12:30

200

12:37

235

12:57

245

13:00

245

Name

Acronym

Units

Calculated from point variable:

Acceptance Volume

qA^k_ij(t)

MW

^fqA^k_ijt

Accepted Bid Volume

qAB^kn_ij(t)

MW

^fqAB^kn_ijt

Accepted Bid-Offer Volume

qABO^kn_ij(t)

MW

^fqABO^kn_ijt

Accepted Offer Volume

qAO^kn_ij(t)

MW

^fqAO^kn_ijt

Bid-Offer Volume

qBOⁿ_ij(t)

MW

^fqBOⁿ_ijt

FPN

FPN_ij(t)

MW

^fFPN_ijt

Deemed Standard Product Shape

qDSP^J_ij(t)

MW

^fDSP^J_ijt

a

Energy Account / Virtual Balancing Account

b

Energy Account

c

Demand Control Instruction

d

Day

e

A particular order number of a ranked System Action

f

Point Value Identification Number

g

A particular System Action

H

The higher of two Point Value Identification Numbers f, specified at the same time t for function ^fF(t)

i

BM Unit

j

Settlement Period

J

Quarter Hour

k

Bid-Offer Acceptance Number

L

The lower of two Point Value Identification Numbers f, specified at time t for function ^fF(t)

m

Calendar month (except in Section T)

Balancing Services Adjustment Action (in Section T)

n

Bid-Offer Pair Number

N

Node

p

Trading Party, Contract Trading Party, Imbalance Party or Virtual Lead Party as the case may be

q

The order number of a Ranked Bid Volume or Ranked Offer Volume

r

Trading Unit

s

Market Index Data Provider

S

BSC Season

t

STOR Action Number

u

The Non-Delivery Order Number

v

A particular order number of a ranked System Action

w

System Action, or the order number of a ranked System Action

x

The order number of a Ranked Priced Offer

y

BSC Year

z

Energy Contract Volume Notification or Metered Volume Reallocation Notification as the case may be.

Z

Zone

α

The number 0.45 as specified in Section T2.2.1(b).

The factor α is that proportion of transmission losses to be deducted in total from the BM Unit Metered Volume of BM Units in delivering Trading Units, for the purposes of allocating transmission losses.

For the purposes of the above, transmission losses are defined as the sum of BM Unit Metered Volume over all BM Units (with BM Units that import having a negative value of BM Unit Metered Volume)

QMFR_ziaj

MWh

An Active Energy value in accordance with Section P3.6.2(a).

In relation to any BM Unit i, for any Settlement Period j, QMFR_ziaj is a fixed volume of Active Energy to be allocated to the corresponding Energy Account a, of a Contract Trading Party other than the Lead Party from the Energy Account of the Lead Party to which the associated Metered Volume Reallocation Notification z, refers.

QMPR_ziaj

%

A percentage value in accordance with Section P3.6.2(b).

In relation to any BM Unit i, for any Settlement Period j, QMPR_ziaj is a percentage of the BM Unit Metered Volume to be allocated to the corresponding Energy Account a of a Contract Trading Party other than the Lead Party from the Energy Account of the Lead Party to which the associated Metered Volume Reallocation Notification z, refers.

ABSVD BM Unit Delivered Volume

AQVMD_NLKji

MWh

Has the meaning given to it in Annex S-2 paragraph 7.1.1E.

Acceptance Data

Data (in accordance with Section Q5.3.1) to be submitted by the NETSO pursuant to Section Q6.2.1(e).

Acceptance Volume

qA^k_ij(t)

MW

The quantity determined in accordance with Section T3.4.

The Acceptance Volume is a quantity of absolute MW for any spot time t obtained by interpolating between Point Acceptance Volumes, qA^k_it, derived from the Acceptance Volume Pairs submitted as part of Acceptance Data for BM Unit i,. and derived from Quarter Hour RR Activations using the Replacement Reserve Schedule Methodology Document.

Acceptance Volume Pair

A pair of data items expressed in accordance with Section Q5.3.1(a) and submitted as part of the Acceptance Data pursuant to Section Q6.2.1(e).

The Acceptance Volume Pair is a pair of MW levels each with an associated spot time which describe the absolute MW level at which a BM Unit should operate at those spot times as a result of Acceptance k.

accepted Bid

MWh

Has the meaning given to that term in Annex T-1.

Accepted Bid Volume

qAB^kn_ij(t)

MW

The quantity established in accordance with Section T3.7.2.

The Accepted Bid Volume is the quantity of Bid n being the negative part of the Accepted Bid-Offer Volume accepted as a result of Bid-Offer Acceptance k from BM Unit i at spot times t within Settlement Period j.

Accepted Bid-Offer Volume

qABO^kn_ij(t)

MW

The quantity established in accordance with Section T3.6

The Accepted Bid-Offer Volume is the quantity of Bid or Offer from Bid-Offer Pair n accepted as a result of Bid-Offer Acceptance k, that is not flagged as relating to an RR Instruction, in Settlement Period j from BM Unit i, for any spot time t within Settlement Period j

accepted Offer

MWh

Has the meaning given to that term in Annex T-1.

Accepted Offer Volume

qAO^kn_ij(t)

MW

The quantity established in accordance with . T3.7.1.

The Accepted Offer Volume is the quantity of Offer n being the positive part of the Accepted Bid-Offer Volume accepted as a result of Bid-Offer Acceptance k from BM Unit i at spot times t within Settlement Period j.

Account Bilateral Contract Volume

QABC_aj

MWh

The quantity determined in accordance with Section P4.1.1.

The Account Bilateral Contract Volume is the aggregate of all Energy Contract Volumes relating to Energy Account a in Settlement Period j disregarding those that have been rejected and those contained in Energy Contract Volume Notifications that were refused and represents the energy debited from account a and credited to the other accounts (except in the case of the NETSO) for the purpose of calculating Account Energy Imbalance Volume.

Account Credited Energy Volume

QACE_aj

MWh

The quantity determined in accordance with Section T4.6.1.

The Account Credited Energy Volume is the aggregate of the BM Unit Metered Volumes allocated to Energy Account a in Settlement Period j.

Account Energy Imbalance Cashflow

CAEI_aj

£

The amount determined in accordance with Section T4.7.1.

The Account Energy Imbalance Cashflow is the total cashflow resulting from the Energy Imbalance of Energy Account a in Settlement Period j such that a negative quantity represents a payment to the Trading Party holding Energy Account a and a positive quantity represents a payment by the Trading Party holding Energy Account a.

Account Energy Imbalance Volume

QAEI_aj

MWh

The quantity determined in accordance with Section T4.6.3.

The Account Energy Imbalance Volume is the sum of the Account Credited Energy Volume, plus the Account Period Bid-Offer Volume less the Account Bilateral Contract Volume for Energy Account a, in Settlement Period j.

Account Period Balancing Services Volume

QABS_aj

MWh

The quantity determined in accordance with Section T4.6.2.

The Account Period Balancing Services Volume is the sum of the net quantity of all accepted Bids and Offers, and the net energy associated with delivery of Applicable Balancing Services from all BM Units for which Energy Account a is the Lead Energy Account in Settlement Period j.

Activated Quantity

MW

In respect of a Position, the quantity of energy to be activated.

Activated Quantity forms part of the Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data for each Position and is submitted by the NETSO pursuant to Section Q.

Actual Energy Indebtedness

AEI_p

MWh

The amount determined as such in accordance with Section M1.2.5.

The Actual Energy Indebtedness is the net energy contribution determined to be allocated to a Trading Party for Settlement Periods as defined in Section M1.2.1.

Arbitrage Tagged

Arbitrage Tagged as provided in paragraph 7 of Part 1 of Annex T-1.

Balancing Demand Control Volume

QBDC_cj

MWh

Has the meaning given to it in Section T3.15.3(b).

Balancing Energy Deviation Price

BEDP_j

£/MWh

The price specified in Section T3.23, being an amount equal to zero.

Balancing Mechanism Window Period

In relation to a particular time, the Balancing Mechanism Window Period is the period from that time to the end of the Settlement Period for which Gate Closure has most recently occurred at that time.

The Balancing Mechanism Window Period has a duration of between one and one hour and thirty minutes .

Balancing Services Adjustment Action

m

An individual item in the Balancing Services Adjustment Data for which data is provided pursuant to Section Q6.3.2(b).

Balancing Services Adjustment Buy Action

m

A Balancing Services Adjustment Action for which the Balancing Services Adjustment Volume is positive.

Balancing Services Adjustment Buy Volume

QBSAB^m_j

MWh

The Balancing Services Adjustment Volume in respect of a Balancing Services Adjustment Buy Action.

Balancing Services Adjustment Cost

£

The amount sent by the NETSO as 'Balancing Services Adjustment Cost' in respect of a Balancing Services Adjustment Action in accordance with Section Q6.3.

Balancing Services Adjustment Price

BSAP^m_j

£/MWh

The amount calculated by the SAA and the BMRA as 'Balancing Services Adjustment Price' in respect of a Balancing Services Adjustment Action in accordance with Section Q6.3.

Balancing Services Adjustment Sell Action

m

A Balancing Services Adjustment Action for which the Balancing Services Adjustment Volume is negative.

Balancing Services Adjustment Sell Volume

QBSAS^m_j

MWh

The Balancing Services Adjustment Volume in respect of a Balancing Services Adjustment Sell Action.

Balancing Services Adjustment Volume

QBSA^m_j

MWh

The amount sent by the NETSO as 'Balancing Services Adjustment Volume' in respect of a Balancing Services Adjustment Action in accordance with Section Q6.3.

Bid

The quantity (as provided in Section Q4.1.3(a) or, where applicable, established in Section T3.4B.3) in a Bid-Offer Pair if considered as a possible decrease in Export or increase in Import of the relevant BM Unit at a given time.

Bid Non-Delivery Volume

QNDBⁿ_ij

MWh

The quantity determined in accordance with Section T4.8.10.

The Bid Non-Delivery Volume is the quantity of non-delivery apportioned to Bid n from BM Unit i in Settlement Period j.

Bid Price

PBⁿ_ij

£/MWh

The amount in £/MWh associated with a Bid and comprising part of a Bid-Offer Pair.

Bid-Offer Acceptance Number

k

A number used to identify a particular Acceptance.

Bid-Offer Acceptance Time

T^k_it

Spot time

Has the meaning given to that term in Section Q5.1.11.

Bid-Offer Data

Data (comprising the items set out in Section Q4.1.3) to be submitted by the NETSO pursuant to Section Q6.2.1(d).

Bid-Offer Lower Range

BOLRⁿ_ij(t)

MW

The range determined in accordance with Section T3.4A.3, T3.4A.4 or T3.5.2 (as the case may be).

The Bid-Offer Lower Range is that data calculated for spot times t in Settlement Period j and BM Unit i, for a Bid-Offer Pair with a negative Bid-Offer Pair Number n. It is used to determine the operating range (in absolute MW) below FPN in which a particular Bid-Offer Pair applies.

Bid-Offer Pair

Data which may be submitted in relation to a BM Unit for a Settlement Period, being data that comprises the items set out in Section Q4.1.3, or (where applicable) data created pursuant to Section T3.4B.1.

Bid-Offer Pair Number

n

A number used to identify a particular Bid-Offer Pair.

Values of n are negative for Bid-Offer Pairs that cover operating levels below FPN and positive for those that cover operating levels above FPN.

Bid-Offer Upper Range

BOURⁿ_ij(t)

MW

The range determined in accordance with Section T3.4A.1, T3.4A.2 or T3.5.1 (as the case may be).

The Bid-Offer Upper Range is that data calculated for spot times t in Settlement Period j and BM Unit i, for a Bid-Offer Pair with a positive Bid-Offer Pair Number n. It is used to determine the operating range (in absolute MW) above FPN in which a particular Bid-Offer Pair applies.

Bid-Offer Volume

qBOⁿ_ij(t)

MW

The quantity established in accordance with Section T3.3Section T3.3

The Bid-Offer Volume is the quantity of power increase or decrease available (relative to FPN) from Bid-Offer Pair n, in Settlement Period j for BM Unit i at spot time t. Initially the Bid-Offer Volume for a Bid-Offer Pair is constant across a particular Settlement Period.

BM Unit Allocated Demand Disconnection Volume

BMUADDV_ij

MWh

The quantity submitted in accordance with paragraph 9.6.2 of Annex S-2.

BM Unit Allocated Demand Volume

BMUADV_ij

MWh

The quantity submitted in accordance with paragraph 9.6.2 of Annex S-2.

BM Unit Applicable Balancing Services Volume Data or BM Unit ABSVD

QAS_ij

MWh

In respect of a BM Unit and a Settlement Period, the Applicable Balancing Services Volume Data sent by the NETSO to the SAA pursuant to Section Q6.4.1.

BM Unit Chargeable Demand

CBMUD_ij

MWh

The amount determined in accordance with Section T8.

The BM Unit Chargeable Demand is the amount of Demand for a BM Unit which has been adjusted to remove electricity consumed by Generation or Storage Facility under the conditions of the Generation license, which should be subject to the Final Consumption Levy.

BM Unit Credit Assessment Export Capability

BMCAEC_i

MW

The quantity determined in accordance with Section M1.6.1(a).

BM Unit Credit Assessment Import Capability

BMCAIC_i

MW

The quantity determined in accordance with Section M1.6.1(b).

BM Unit Identification Number

i

A unique identifier for each BM Unit.

BM Unit Metered Volume

QM_ij

MWh

In respect of a Settlement Period:

(i) in relation to a BM Unit (other than an Interconnector BM Unit) comprising CVA Metering Systems, the Metered Volume (as determined in accordance with Section R);

(ii) in relation to an Interconnector BM Unit of an Interconnector User, the quantity determined in accordance with Section R7.4.2 (but without prejudice to Section T1.4.6);

(iii) in relation to an Interconnector BM Unit allocated to an Interconnector Error Administrator, the quantity determined in accordance with Section T4.1; and

(iv) in relation to a Supplier BM Unit, the quantity determined in accordance with Section T4.2.1 and

(v) in relation to a Secondary BM Unit, the quantity determined in accordance with Section T4.2A.1.

BM Unit MSID Pair Data

Has the meaning given to that term in Section S paragraph 10.1.3.

BM Unit Period Non-Delivery Charge

CND_ij

£

The amount determined in accordance with Section T4.8.13.

The BM Unit Period Non-Delivery Charge is the total non-delivery charge associated with the non-deliver of Bids or Offers for BM Unit i in Settlement Period j.

Buy Price Price Adjustment

BPAj

£/MWh

The amount sent by the NETSO as the ‘Buy Price Price Adjustment’ in accordance with Section Q6.3.

CADL Flagged

CADL Flagged as provided in paragraph 3 of Part 1 of Annex T-1.

Classified Ranked Set

One of the Classified Ranked Sets as provided in paragraph 8 of Part 1 of Annex T-1.

Continuous Acceptance Duration

CAD^k_i

Minutes

Has the meaning given to that term in paragraph 12.3 of Annex T-1.

Continuous Acceptance Duration Limit

CADL

Minutes

The value established and from time to time revised and approved in accordance with Section T1.9.

Corrected Component

CORC_iNj

MWh

The quantity submitted in accordance with paragraph 9.3.3 of Annex S-2.

Corrected MSID ABSVD Component

CORABSVDC_i2Nj

Has the meaning given to it in Annex S-2 paragraph 9.3.5.

Credit Assessment Credited Energy Volume

CAQCE_iaj

MWh

The amount determined in accordance with Section M1.2.3.

The Credit Assessment Credited Energy Volume is the contribution to a Trading Party’s Credit Assessment Energy Indebtedness from BM Unit i and Energy Account a in Settlement Period j.

Credit Assessment Energy Indebtedness

CEI_pj

MWh

The amount determined as such in accordance with Section M1.2.2.

The Credit Assessment Energy Indebtedness is the net energy contribution determined to be allocated to a Trading Party for Settlement Periods as defined in Section M1.2.1.

Credit Cover

CC_p

£

Is defined in Annex X-1

Credit Cover Error Compensation

CCEC_p

£

Has the meaning given to that term in Section M4.1.1.

The Credit Cover Error Compensation is the aggregate payment that may be made to a Trading Party in relation to a Credit Cover Error.

Credit Cover Error Erroneous Rejection Flag

FLAG_pj

Has the value determined in accordance with Section M4.2.3.

The Credit Cover Error Erroneous Rejection Flag is a flag indicating whether Settlement Period j was determined erroneously to fall within a Credit Default Rejection Period for Trading Party p.

Credit Cover Error Imbalance Amount

ECB_pj

£

The amount determined as such in accordance with Section M4.2.3.

The Credit Cover Error Imbalance Amount represents the Energy Imbalance related compensation that may be paid to a Trading Party in relation to Settlement Period j, as a consequence of a Credit Cover Error.

Credit Cover Error Interest Amount

ECA_pj

£

The amount determined as such in accordance with Section M4.2.2.

The Credit Cover Error Interest Amount represents the interest related compensation that may be paid to a Trading Party in relation to Settlement Period j, as a consequence of a Credit Cover Error.

Credit Cover Error Rejection Volume

REJ_aj

MWh

The quantity determined in accordance with Section M4.2.3.

The Credit Cover Error Rejection Volume represents an assessment of the change (whether positive or negative) in the quantity of energy that would have been allocated to Energy Account a, of Trading Party P, in Settlement Period j, had Energy Contract Volume Notifications and Data relating to Metered Volume Reallocation Notifications not been rejected in accordance with Sections P2.5.2, and P3.5.2, by virtue of Trading Party P being in Level 2 Credit Default.

Credit Cover Percentage

CCP_pj

%

Has the meaning given to that term in Section M3.1.1.

Credited Energy Volume

QCE_iaj

MWh

The quantity determined in accordance with Section T4.5.1.

Daily Party BM Unit Cashflow

CBM_p

£

The amount determined in accordance with Section T3.12.2.

Daily Party Energy Imbalance Cashflow

CAEI_p

£

The amount determined in accordance with Section T4.7.3.

Daily Party Information Imbalance Charge

CII_p

£

The amount determined in accordance with Section T4.3.8.

Daily Party Non-Delivery Charge

CND_p

£

The amount determined in accordance with Section T4.8.15

Daily Party Residual Settlement Cashflow

RCRC_p

£

The amount determined in accordance with Section T4.10.4.

Daily Party RR Cashflow

CRR_p

£

The amount determined in accordance with T3.25.2.

Daily Party RR Instruction Deviation Cashflow

CDR_p

£

The amount determined in accordance with T3.25.3.

Daily System Operator Cashflow

CSO

£

The amount determined in accordance with Section T4.9.2.

DC Limits

MW and/or %

Is defined in Annex X-1.

De Minimis Acceptance Threshold

DMAT

MWh

The value established and from time to time revised and approved in accordance with Section T1.8.

De Minimis Tagged

De Minimis Tagged as provided in paragraph 6 of Part 1 of Annex T-1.

Deemed Standard Product Bid Volume

qDSPB^J_ij(t)

MW

The quantity established in accordance with Section T3.19.2.

The Deemed Standard Product Bid Volume is the quantity of Bid being the negative part of the Deemed Standard Product Volume created as a result of a Quarter Hour RR Activation from BM Unit i at spot times t in Quarter Hour J.

Deemed Standard Product Offer Volume

qDSPO^J_ij(t)

MW

The quantity established in accordance with Section T3.19.1.

The Deemed Standard Product Offer Volume is the quantity of Offer being the positive part of the Deemed Standard Product Volume created as a result of a Quarter Hour RR Activation from BM Unit i at spot times t in Quarter Hour J.

Deemed Standard Product Point Variables

qDSP^J_ijt

MW

A MW level and associated time created in accordance with Section T3.1.5(c).

A Point Acceptance Volume, created from Quarter Hour RR Activation Data, is a level in absolute MW for spot time t and BM Unit i, used to imply the acceptance of one or more Replacement Reserve Bids.

Deemed Standard Product Shape

qDSP^J_ij(t)

MW

The quantity established in accordance with Section T3.17.1.

The Deemed Standard Product Shape is a quantity of absolute MW for any spot time t obtained by interpolating between Deemed Standard Product Point Variables, qDSP^J_ijt, derived from the Quarter Hour RR Activation Data submitted as part of the Quarter Hour Auction Result Data for an Replacement Reserve Auction Period

Deemed Standard Product Volume

qDSPV^J_ij(t)

MW

The quantity established in accordance with Section T3.18.1.

The Deemed Standard Product Volume is the quantity of Bid or Offer accepted as a result of a Quarter Hour RR Activation from BM Unit i at spot times t in Quarter Hour J.

Default Funding Share

FSD_pm

Has the meaning given to that term in Section D1.3.1(b).

Delivering Transmission Losses Adjustment.

TLMO⁺_j

The factor determined as such in accordance with Section T2.3.1.

The factor used in the determination of the Transmission Loss Multiplier for BM Units in Delivering Trading Units in Settlement Period j

De-Rated Margin Forecast

MWh

The forecast submitted in accordance with Section Q6.1.25.

Emergency Acceptance

An Acceptance which falls within Section Q5.1.3(b).

Emergency Flagged Ranked Set

One of the Emergency Flagged Ranked Sets as provided in paragraph 5 of Part 1 of Annex T-1.

End Point Demand Control Level

MW

Has the meaning given to that term in Section T3.15(b).

Energy Contract Volume

ECQ_zabj

MWh

An Active Energy value in accordance with Section P2.6.1.

Energy Credit Cover

ECC_p

MWh

Has the meaning given to that term in Section M2.4.1.

Energy Indebtedness

EI_pj

MWh

Has the meaning given to that term in Section M1.2.1.

Erroneous Energy Indebtedness

EEI_pj

MWh

The amount determined as such in accordance with Section M4.2.2.

The Erroneous Energy Indebtedness represents an assessment of that amount of Energy Credit Cover that a Trading Party would have had to establish in Settlement Period j, in order to avoid being in level 1 credit default based on the erroneous calculation of Energy Indebtedness.

Final Loss of Load Probability

LoLP_j

In relation to a Settlement Period, the final probability to be provided by the NETSO in accordance with the Loss of Load Probability Calculation Statement and Section Q6.7.2 or Q6.8.4, as applicable.

Final Ranked Set

The Final Ranked Set as provided in paragraph 11.3 of Part 1 of Annex T-1.

First-Stage Flagged

First-Stage Flagged in accordance with paragraph 3, 4 or 5 of Part 1 of Annex T-1.

Flagged (and Unflagged)

Have the meanings given to those terms in paragraph 1.4 of Annex T-1.

Flow Direction

Indicates the direction of the flow of energy associated with a Position.

Flow Direction forms part of the Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data for each Position and is submitted by the NETSO pursuant to Section Q.

Forecast Total Power Park Module Generation

MW

The forecast of total generation across all Power Park Modules metered by the NETSO in accordance with CC6.5.6 of the Grid Code.

FPN

FPN_ij(t)

MW

The quantity established in accordance with Section T3.2.1.

The final physical notification for BM Unit is the level of import or export (as the case may be) that the Party expects to import or export from BM Unit i, in Settlement Period j, in the absence of any Balancing Mechanism Acceptances from the NETSO.

The value of FPN_ij(t) is calculated for spot times t in Settlement Period by linear interpolation from the discrete values of Point FPN submitted.

Network Gas Supply Imbalance Adjustment Volume

QNGSIA_ij

MWh

Has the meaning given to that term in Section T3.9.2A.

Network Gas Supply Total Bid Payment

TNGSB_i

£

Has the meaning given to that term in Section T3.12A.1.

GB Need Met Data

Data (comprising the items set out in Section Q5.6.3) to be submitted by the NETSO pursuant to Section Q6.2C.1(d).

GC Limits

MW and/or %

Is defined in Annex X-1.

General Funding Share

FSG_pm

Has the meaning given to that term in Section D1.2.1(d).

In relation to month m, a Trading Party’s General Funding Share reflects its proportionate share of the aggregate of certain BSCCo Charges for that month.

Generating Plant Demand Margin

OCNMFD or OCNMFW

MW

Has the meaning given to that term in OC2 of the Grid Code.

Generic Line Loss Factor

A Line Loss Factor established for a class of Metering System as provided for in Section K1.7.2.

Gross Contract MWh

MWh

The value established in accordance with Annex D-3 paragraph 3.2.

The Gross Contract MWh is the gross aggregate of all Energy Contract Volumes and Metered Volume Fixed Reallocations relating to a Trading Party over a given month.

GSP Group Metered Volume

MWh

In relation to any GSP Group and any Settlement Period, a Metered Volume representing the algebraic sum of:

(i) the quantity of Active Energy flowing into a GSP Group at Grid Supply Points connected to that GSP Group and at Distribution Systems Connections Points connected to that GSP Group, and

(ii) the quantity of Active Energy flowing out of a GSP Group at Grid Supply Points connected to that GSP Group and at Distribution Systems Connections Points connected to that GSP Group

but disregarding Exports and Imports at Boundary Points in that GSP Group.

GSP Group Take

MWh

In relation to any GSP Group and any Settlement Period, shall be determined as follows:

GSPGT = GMV + I – E

where:

GSPGT means the GSP Group Take for that GSP Group and that Settlement Period;

GMV means the GSP Group Metered Volume for that GSP Group and that Settlement Period;

I means the magnitude of the quantities of Imports at CVA Boundary Points in that GSP Group (as at the Transmission Boundary) for that Settlement Period; and

E means the magnitude of the quantities of Exports at CVA Boundary Points in that GSP Group (as at the Transmission Boundary) for that Settlement Period.

High Reference Temperature

Degrees celsius

The daily average temperature for Great Britain which was exceeded on twelve (12) percent (%) of days during a thirty year historic period.

High Reference Transmission Energy

MWh

The daily aggregate Transmission Energy which was exceeded on twelve (12) percent (%) of days during a thirty year historic period.

Indicated Constraint Boundary Margin

MELNGC

MW

The import and export constraint limits for a BMRS Zone.

The import constraint limit being calculated as the boundary transfer limit minus the Demand Forecast plus the sum of Maximum Export Limits for exporting BM Units and the export constraint limit being calculated as the boundary transfer limit plus the Demand Forecast minus the sum of Maximum Export Limits for exporting BM Units

Indicated Demand

INDDEM

MW

The half-hour average MW expected demand in each Settlement Period calculated as the sum of all Physical Notifications for that Settlement Period prevailing at the time of the forecast and for BM Units for which the Physical Notifications are negative, i.e. will be importing energy.

Indicated Generation

INDGEN

MW

The half-hour average MW expected generation in each Settlement Period calculated as the sum of all Physical Notifications for that Settlement Period prevailing at the time of the forecast and for BM Units for which the Physical Notifications are positive, i.e. will be exporting energy.

Indicated Imbalance

IMBALNGC

MW

Has the meaning given to that term in the Grid Code.

Calculated as the difference between the sum of all Physical Notifications for exporting BM Units (i.e. the Indicated Generation) and the Transmission System Demand forecast

Indicated Margin

MW

Has the meaning given to that term in the Grid Code.

Calculated as the difference between the sum of all Maximum Export Limits for exporting BM Units and the Transmission System Demand forecast

Indicative Loss of Load Probability

In relation to a Settlement Period, the indicative probability to be provided by the NETSO in accordance with the Loss of Load Probability Calculation Statement and Sections Q6.8.2 and Q6.8.3.

Indicative Net Imbalance Volume

INIV_j

MWh

The Indicative Net Imbalance Volume calculated in accordance with Section V2.6.5.

Indicative Period Accepted Bid Volume

IRRAB^kn_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Period Accepted Offer Volume

IRRAO^kn_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Period Balancing Mechanism Bid Cashflow

ICBⁿ_ij

£

The amount determined in accordance with Section V2.6.6.

Indicative Period Balancing Mechanism Offer Cashflow

ICOⁿ_ij

£

The amount determined in accordance with Section V2.6.6.

Indicative Period BM Unit Total Accepted Bid Volume

IQABⁿ_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Period BM Unit Total Accepted Offer Volume.

IQAOⁿ_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Period RR BM Unit Cashflow

ICRR_iJ

£

The quantity determined in accordance with Section V2.6.6A

Indicative Period RR Total Accepted Bid Volume

IRRABⁿ_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Period RR Total Accepted Offer Volume

IRRAOⁿ_ij

MWh

The quantity determined in accordance with Section V2.6.4

Indicative Quarter-Hour RR Cashflow

ICCR_iJ

£

The quantity determined in accordance with Section V2.6.6A

Indicative System Buy Price

ISBP_j

£/MWh

The Indicative System Buy Price calculated in accordance with Section V2.6.5.

Indicative System Sell Price

ISSP_j

£/MWh

The Indicative System Sell Price calculated in accordance with Section V2.6.5.

Information Imbalance Charge

CII_ij

£

The amount determined in accordance with Section T4.3.6.

The Information Imbalance Charge is the charge applicable to the associated Lead Party as a result of the difference in FPN data as modified by Acceptances and BM Unit Metered Volume from BM Unit i in Settlement Period j.

Information Imbalance Price

IIP_j

£/MWh

The price specified in Section T4.3.5, being an amount equal to zero.

Initial Energy Credit Cover

IECC_p

MWh

The amount determined as such in accordance with Section M4.2.2.

The Initial Energy Credit Cover is the amount of Credit Cover that a Trading Party p has in place at the start of a Credit Cover Error Period.

Initial National Demand Out-Turn

INDO

MW

The demand metered by the NETSO taking into account transmission losses but not including station transformer load, pumped storage demand or Interconnector demand. References to INDO in Section Q6.1.13 and in Table 1 of Section V Annex V-1 mean the half-hour average INDO for a Settlement Period. References to INDO in Section G3.1.4 mean the spot time INDO measured by the NETSO in accordance with that paragraph.

Initial Ranked Set

One of the Initial Ranked Sets of System Actions as provided in paragraph 2.1(c) of Part 1 of Annex T-1.

Initial Transmission System Demand Out-Turn

ITSDO

MW

The half-hour average MW demand metered by the NETSO taking into account transmission losses and including station transformers load, pumped storage demand and Interconnector demand.

Interconnector Metered Volume

IMV_j

MWh

Is defined in Annex X-1.

The net aggregate volume of Active Energy, determined as at the Transmission System Boundary, which flowed from or to the relevant Interconnector in Settlement Period j.

Interconnector Schedule Data

Data (comprising the items set out in Section Q5.6.4) to be submitted by the NETSO pursuant to Section Q6.2C.1(d).

Line Loss Factor

Means a multiplier which, when applied to data from a CVA Metering System connected to a Boundary Point on a Distribution System, converts such data into an equivalent value at the Transmission System Boundary.

Line Loss Factor Class

LLFC

A set of SVA Metering Systems defined by a Licensed Distribution System Operator relating to any one or more of its Distribution System(s) that are assigned the same Line Loss Factor for the relevant Settlement Period.

Loss of Load Probability

In relation to a Settlement Period, the Final Loss of Load Probability or the Indicative Loss of Load Probability as the context so requires.

Low Reference Temperature

Degrees celsius

The daily average temperature for Great Britain which was exceeded on eighty eight (88) percent (%) of days during a thirty year historic period.

Low Reference Transmission Energy

MWh

The daily aggregate Transmission Energy which was exceeded on eighty eight (88) percent (%) of days during a thirty year historic period.

Main Funding Share

FSM_pm

Has the meaning given to that term in Section D1.2.1(a).

The Main Funding Share represents a Trading Party’s proportionate share of the aggregate Credited Energy Volumes for month m.

Market Index Price

PXP_sj

£/MWh

In relation to a Market Index Data Provider and a Settlement Period, the price data to be provided by that Market Index Data Provider in accordance with the Market Index Definition Statement or (where applicable) deemed in accordance with Section T4.3A.1.

Market Index Volume

QXP_sj

MWh

In relation to a Market Index Data Provider and a Settlement Period, the volume data to be provided by that Market Index Data Provider in accordance with the Market Index Definition Statement or (where applicable) deemed in accordance with Section T4.3A.1.

Market Price

MP_j

£/MWh

Has the meaning given to that term in Section T4.3A.2.

Maximum Delivery Period

Has the meaning given to that term in BC1 of the Grid Code.

Maximum Delivery Volume

Has the meaning given to that term in BC1 of the Grid Code.

Maximum Export Limit

Has the meaning given to that term in BC1 of the Grid Code.

Maximum Import Limit

Has the meaning given to that term in BC1 of the Grid Code.

Metered Credit Assessment Credited Energy Volume

MAQCE_iaj

MWh

is defined in Section M1.2.4A.

The Metered Credit Assessment Credited Energy Volume is the contribution to a Trading Party’s Metered Energy Indebtedness from BM Unit i and Energy Account a in Settlement Period j.

Metered Energy Indebtedness

MEI_pj

MWh

is defined in Section M1.2.4A.

The Metered Energy Indebtedness is the net energy contribution determined to be allocated to a Trading Party for Settlement Periods as defined in Section M1.2.4A.

Metered Volume Fixed Reallocation

QMFR_iaj

MWh

A MWh value determined in accordance with Section P4.3.1.

In relation to any BM Unit i, for any Settlement Period j, Metered Volume Fixed Reallocation means, for Energy Account a of a Contract trading Party, the aggregate of all Metered Volume Reallocation Notification Fixed Data for Metered Volume Reallocation Notifications relating to such Energy Account.

Metered Volume Percentage Reallocation

QMPR_iaj

%

A percentage value determined in accordance with Section P4.3.1.

In relation to any BM Unit i, for any Settlement Period j, Metered Volume Percentage Reallocation means, for Energy Account a of Contract Trading Party, the aggregate of all Metered Volume Reallocation Notification Percentage Data for Metered Volume Reallocation Notifications relating to such Party.

Minimum Non-Zero Time

Has the meaning given to that term in BC1 of the Grid Code.

Minimum Zero Time

Has the meaning given to that term in BC1 of the Grid Code.

Monthly Consumption-Charging Net SVA Costs

MCNSC_m

£

Has the meaning given to that term in Section D4.1(d).

Monthly Default Costs

MDC_m

£

Has the meaning given to that term in Section D4.1(e).

Monthly Net Main Costs

MNMC_m

£

Has the meaning given to that term in Section D4.1(d).

Monthly payment

P_pm

£

Has the meaning given to that term in Annex D 4 1.1.

Monthly Production-Charging SVA Costs

MPSC_m

£

Has the meaning given to that term in Section D4.1(d).

MSID Pair Data

The data comprising the data items pursuant to Section S10.1 and may be:

(i) BM Unit MSID Pair Data; or

(ii) Non BM Unit ABSVD MSID Pair Data

MSID Pair Delivered Volume

MPDV

MWh

The amount determined in accordance with Section Q6.4.10 or S11.1.1.

.MSID Pair Delivered Volume is such volumes of Active Energy notified to the SVAA by the NETSO for the purposes of calculating Non BM Unit ABSVD (SNBABSVD_ij); or by the Virtual Lead Party for the purposes of aggregating Secondary BM Unit Supplier Delivered Volume (VBMUSDV_iZj).

National Demand

Has the meaning given to the term National Demand as defined in the Grid Code.

Net Imbalance Volume

NIV_j

MWh

Has the meaning given to that term in paragraph 14.1 of Annex T-1.

NIV Tagged

NIV Tagged as provided in paragraph 9 of Part 1 of Annex T-1.

Non BM Unit Applicable Balancing Services Volume Data or Non BM Unit ABSVD

The following data:

(i) Non BM Unit ABSVD MSID Pair Data ;

(ii) the associated MSID Pair Delivered Volume.

Non BM Unit ABSVD MSID Pair Data

Has the meaning given to that term in Section Q 6.4.8.

Non-BM STOR Instructed Volume

MWh

The volume of Short Term Operating Reserve instructed by the NETSO outside of the balancing mechanism in order to increase generation or reduce demand.

Non-BM STOR Instruction

A Short Term Operating Reserve instruction given by the NETSO outside of the balancing mechanism in order to increase generation or reduce demand.

Non-Delivered Bid Charge

CNDBⁿ_ij

£

The amount determined in accordance with Section T4.8.12.

The Non-Delivered Bid Charge is a charge in Settlement Period j, that may relate to an accepted Bid n, that is determined not to have been delivered (either wholly or in part) from BM Unit i.

Non-Delivered Bid Price

NDPBⁿ_ij

£/MWh

The amount determined in accordance Section T4.8.19, T4.8.20 and T4.8.21.

The amount in £/MWh associated with an Accepted Bid (being an Accepted Bid or a downward Quarter Hour RR Activation) that is allocated to Period BM Non-Delivered Bid Volume.

Non-Delivered Offer Charge

CNDOⁿ_ij

£

The amount determined in accordance with Section T4.8.11.

The Non-Delivered Offer Charge is a charge in Settlement Period j, that may relate to an accepted Offer n, that is determined not to have been delivered (either wholly or in part) from BM Unit i.

Non-Delivered Offer Price

NDPOⁿ_ij

£/MWh

The amount determined in accordance Section T4.8.16, T4.8.17 and T4.8.18.

The amount in £/MWh associated with an Accepted Offer (being an Accepted Offer or an upward Quarter Hour RR Activation) that is allocated to Period BM Non-Delivered Offer Volume.

Non-Delivery Order Number

u

The number allocated to an Offer or Bid in accordance with Section T4.8.4 or T4.8.8.

The Non-Delivery Order Number (u) is an index used to rank non-delivered Offers or Bids from a BM Unit in a particular Settlement Period in order to determine the order of allocation the Period BM Unit Non-Delivered Offer Volume, or the Period BM Unit Non-Delivered Bid Volume.

Non-Working Day Credit Assessment Load Factor

NWDCALF_i

Is defined in Annex X-1.

The factor is used to establish the BM Unit Credit Assessment Export Capability and BM Unit Credit Assessment Import Capability for BM Unit i on a CALF Non-Working Day determined for the purposes of Credit Assessment Load Factor.

Normal Reference Temperature

Degrees celsius

The daily average temperature for Great Britain which was exceeded on fifty (50) percent (%) of days during a thirty year historic period.

Normal Reference Transmission Energy

MWh

The daily aggregate Transmission Energy which was exceeded on fifty (50) percent (%) of days during a thirty year historic period.

Notice to Deliver Bids

Has the meaning given to that term in BC1 of the Grid Code.

Notice to Deliver Offers

Has the meaning given to that term in BC1 of the Grid Code.

Notice to Deviate from Zero

Has the meaning given to that term in BC1 of the Grid Code.

Offer

The quantity (as provided in Section Q4.1.3(a) or, where applicable, established in Section T3.4B.3) in a Bid-Offer Pair if considered as a possible increase in Export or decrease in Import of the relevant BM Unit at a given time.

Offer Non-Delivery Volume

QNDOⁿ_ij

MWh

The quantity determined in accordance with Section T4.8.6.

The Offer Non-Delivery Volume is the quantity of non-delivery apportioned to Offer n from BM Unit i in Settlement Period j.

Offer Price

POⁿ_ij

£/MWh

The amount in £/MWh associated with an Offer and comprising part of a Bid-Offer Pair.

Offtaking Transmission Losses Adjustment

TLMO^-_j

The factor determined as such in accordance with Section T2.3.1.

The factor used in the determination of the Transmission Loss Multiplier for BM Units in Offtaking in Trading Units in Settlement Period j

Output Usable

MW

Has the meaning given to that term in the Grid Code.

Out-Turn Temperature

Degrees celsius

A single value deemed to be representative of the temperature for Great Britain as measured at midday.

PAR Tagged

PAR Tagged as provided in paragraph 11 of Part 1 of Annex T-1.

Party Daily Reallocation Proportion

Has the meaning given to that term in Section G1.3.

Party Submitted Expected Volumes

PSEV

MWh

The volume submitted by the Party which represents the Party’s forecast of expected volumes per Settlement Period for all MSID Pairs not selected for Baselining within a BMU providing Balancing Services

Period Accepted Bid Volume

QAB^kn_ij

MWh

The quantity established in accordance with Section T3.8.2.

The Period Accepted Bid Volume is the volume of Bid n, accepted in respect of BM Unit i, in Settlement Period j, as a result of Acceptance k, where that Acceptance is not flagged as relating to an RR Schedule.

Period Accepted Offer Volume

QAO^kn_ij

MWh

The quantity established in accordance with Section T3.8.1.

The Period Accepted Offer Volume is the volume of Offer n, accepted in respect of BM Unit i, in Settlement Period j as a result of Acceptance k, where that Acceptance is not flagged as relating to an RR Schedule.

Period BM Unit Balancing Services Volume

QBS_ij

MWh

The quantity determined in accordance with Section T4.3.2.

The Period BM Unit Balancing Services Volume is the sum of the net quantity of accepted Bids and Offers and the net quantity of energy associated with delivery of Applicable Balancing Services from BM Unit i in Settlement Period j.

Period BM Unit Bid Cashflow

CBⁿ_ij

£

The amount determined in accordance with Section T3.10.2.

The Period BM Unit Bid Cashflow is the total cashflow resulting from accepted volumes of Bid n from BM Unit i in Settlement Period j.

Period BM Unit Cashflow

CBM_ij

£

The amount determined in accordance with Section T3.11.1.

The Period BM Unit Cashflow is the total cashflow resulting from all accepted Bids and Offers from BM Unit i in Settlement Period j.

Period BM Unit Non Chargeable Demand

NCBMUD_ij

MWh

The amount determined in accordance with Annex S-2 3.11 which is used in Section T8.

The Period BM Unit Non Chargeable Demand is the amount of Demand for a BM Unit which has been consumed by Generation or Storage Facility under the conditions of the Generation license which should not be subject to the Final Consumption Levy.

Period BM Unit Demand Disconnection Volume

QDD_ij

MWh

The quantity established in accordance with Section R8.2.1.

The Period BM Unit Demand Disconnection Volume is the volume of energy for BM Unit i in Settlement Period j that was subject to Demand Disconnection.

Period BM Unit Non-Delivered Bid Volume

QNDB_ij

MWh

The quantity determined in accordance with Section T4.8.2.

The Period BM Unit Non-Delivered Bid Volume is the quantity of non-delivered Bids from BM Unit i in Settlement Period j.

Period BM Unit Non-Delivered Offer Volume

QNDO_ij

MWh

The quantity determined in accordance with Section T4.8.1.

The Period BM Unit Non-Delivered Offer Volume is the quantity of non-delivered Offers from BM Unit i in Settlement Period j.

Period BM Unit Offer Cashflow

COⁿ_ij

£

The amount determined in accordance with Section T3.10.1.

The Period BM Unit Offer Cashflow is the total cashflow resulting from accepted volumes of Offer n from BM Unit i in Settlement Period j.

Period BM Unit Total Accepted Bid Volume

QABⁿ_ij

MWh

The quantity established in accordance with Section T3.9.2.

The Period BM Unit Total Accepted Bid Volume is the quantity of Bid n, accepted in respect of BM Unit i, in Settlement Period j, as a result of all Acceptances that are not flagged as relating to an RR Schedule.

Period BM Unit Total Accepted Offer Volume

QAOⁿ_ij

MWh

The quantity established in accordance with Section T3.9.1.

The Period BM Unit Total Accepted Offer Volume is the quantity of Offer n, accepted in respect of BM Unit i, in Settlement Period j, as a result of all Acceptances that are not flagged as relating to an RR Schedule.

Period Deemed Standard Product Bid Volume

DSPB^J_ij

MWh

The quantity established in accordance with Section T3.20.2.

The Period Deemed Standard Product Bid Volume is the volume of Bid, accepted in respect of BM Unit i, in Settlement Period j as a result of an acceptance of a Replacement Reserve Bid in Quarter Hour J.

Period Deemed Standard Product Offer Volume

DSPO^J_ij

MWh

The quantity established in accordance with Section T3.20.1.

The Period Deemed Standard Product Offer Volume is the volume of Offer, accepted in respect of BM Unit i, in Settlement Period j as a result of an acceptance of a Replacement Reserve Bid in Quarter Hour J.

Period Expected Metered Volume

QME_ij

MWh

The quantity determined in accordance with Section T4.3.3.

The Period Expected Metered Volume is the quantity of energy that a particular BM Unit i, is expected to export or import in Settlement Period j, after taking account of any accepted offers or bids.

Period FPN

FPN_ij

MWh

The quantity determined in accordance with T4.3.1.

The Period FPN is the integrated MWh of energy implied by integrating the Final Physical Notification for BM Unit i over Settlement Period j.

Period Information Imbalance Volume

QII_ij

MWh

The quantity determined in accordance with Section T4.3.4.

The Period Information Imbalance Volume is the difference between the BM Unit Metered Volume and the Period Expected Metered Volume for BM Unit i in Settlement Period j.

Period RR Accepted Bid Volume

RRAB^kn_ij

MWh

The quantity established in accordance with Section T3.8.4.

The Period RR Accepted Bid Volume is the volume of Bid n, accepted in respect of BM Unit i, in Settlement Period j, as a result of Acceptance k, where that Acceptance is flagged as relating to an RR Schedule.

Period RR Accepted Offer Volume

RRAO^kn_ij

MWh

The quantity established in accordance with Section T3.8.3.

The Period RR Accepted Offer Volume is the volume of Offer n, accepted in respect of BM Unit i, in Settlement Period j as a result of Acceptance k, where that Acceptance is flagged as relating to an RR Schedule.

Period RR BM Unit Cashflow

CRR_ij

£

The amount determined in accordance with Section T3.11B.1.

The Period RR BM Unit Cashflow is the total cashflow resulting from all Quarter Hour RR Activations from BM Unit i in Settlement Period j.

Period RR Total Accepted Bid Volume

RRABⁿ_ij

MWh

The quantity established in accordance with Section T3.9.4.

The Period RR Total Accepted Bid Volume is the quantity of Bid n, accepted in respect of BM Unit i, in Settlement Period j, as a result of all Acceptances that are flagged as relating to an RR Schedule.

Period RR Total Accepted Offer Volume

RRAOⁿ_ij

MWh

The quantity established in accordance with Section T3.9.3.

The Period RR Total Accepted Offer Volume is the quantity of Offer n, accepted in respect of BM Unit i, in Settlement Period j, as a result of all Acceptances that are flagged as relating to an RR Schedule.

Period Secondary BM Unit Delivered Proportion

SP_iji2

MWh

This quantity is determined in accordance with Section T4.3B.3.

Period Secondary BM Unit Delivered Volume

QSD_ij

_or

QSD_i2j

MWh

This quantity is determined in accordance with Section T4.3B.2.

This quantity is represented by the acronym QSD_i2j in paragraph T4.3B.4 for the sole reason that the formula in this paragraph refers to both Primary BM Units and Secondary BM Units.

Period Secondary BM Unit Non-Delivered Volume

QSND_ij

MWh

This quantity is determined in accordance with Section T4.3B.1.

Period Secondary BM Unit Supplier Delivered Volume

QSD_iji2

MWh

This quantity is determined in accordance with Section T4.3B.4.

Period Supplier BM Unit Delivered Volume

QBSD_ij

MWh

This quantity is determined in accordance with Section T4.3B.5.

Point Acceptance Volume

qA^k_it

MW

A MW level and associated time created in accordance with Section T3.1.2(c)

A Point Acceptance Volume submitted as part of Acceptance Volume Pair, is a level in absolute MW for spot time t and BM Unit i, used to imply the acceptance of one or more Offers and/or Bids.

Point Bid-Offer Volume

^fqBOⁿ_ijt

MW

A MW level and associated time in accordance with Section T3.1.2(b).

The Point Bid-Offer Volume is one of two MW quantities each with the same or different associated spot time t, determined for each Bid-Offer Pair n, for BM Unit i in Settlement Period j.

Point FPN

^fFPN_ijt

MW

A MW quantity and associated time in accordance with Section T3.1.2(a).

Point FPN data is a series of one or more MW spot values submitted for spot times t in Settlement Period j for BM Unit i. It is used to determine the values of Final Physical Notification.

Point Value Identification Number

f

A number used to differentiate two values of a point variable determined for the same spot time and established for Point FPN values in Section T3.1.2(a) and for Point Bid-Offer Volumes in Section T3.1.2(b).

Position

The identifier for a specific period of time submitted to the SAA pursuant to Section T3.1.5 with associated Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data.

Each Position is an identifier determined by reference to a Replacement Reserve Auction Period Resolution Type. For a PT60 there will be one Position associated with the relevant Replacement Reserve Auction Period, for a PT30 there will be two Positions associated with the relevant Replacement Reserve Auction Period and for a PT15 there will be four Positions associated with the relevant Replacement Reserve Auction Period. The SAA will convert Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data associated with each Position into Quarter Hour data pursuant to Section T3.1.5.

Price Average Reference Volume

PAR

MWh

The volume determined in accordance with Section T1.10.1

Quarter Hour

A period of fifteen minutes beginning on the hour or each quarter hour thereafter and in accordance with paragraph 4.3A of this Annex X-2.

Quarter Hour GB Need Met

For each Quarter Hour, data derived from GB Need Met Data pursuant to Section T3.1.5.

Quarter Hour Interconnector Schedule

For each Quarter Hour, data derived from Interconnector Schedule Data pursuant to Section T3.1.5.

Quarter Hour RR Activated Quantity

For each Quarter Hour, the MW level derived from Replacement Reserve Auction Result Data pursuant to Section T3.1.5.

Quarter Hour RR Activation

For each Quarter Hour, data derived from Replacement Reserve Activation Data pursuant to Section T3.1.5.

Quarter Hour RR Activation Data

Data (comprising the items set out in Section Q5.6.2) to be submitted by the NETSO pursuant to Section Q6.2C.1(d).

Quarter Hour RR Activation Price

£/MWh

The price associated with a RR Activation as defined in Section Q5.6.2(e).

Quarter Hour RR Activation Volume

RRAV_iJ

MWh

The quantity established in accordance with Section T3.9.5.

The RR Activation Level multiplied by the Quarter Hour duration in hours, for a given Quarter Hour RR Activation.

Quarter Hour RR Cashflow

CCR_iJ

£

The amount determined in accordance with Section T3.11A.1.

The Quarter Hour RR Cashflow is the total cashflow resulting from a RR Activations from BM Unit i in Quarter Hour J.

Quarter Hour Volume GB Need Met

VGB^J

MWh

For each Quarter Hour, data derived from Quarter Hour Interconnector Schedule pursuant to Annex T1 paragraph 1.2.(b).vii or paragraph 1.2.(c).vii

Quarter Hour Volume Interconnector Schedule

VI^J

MWh

For each Quarter Hour, data derived from Quarter Hour Interconnector Schedule pursuant to Annex T1 paragraph 1.2.(b).viii or paragraph 1.2.(c).viii

Ranked Set

Has the meaning given to that term in paragraph 1.2 of Annex T-1.

Registered Capacity

MW

Has the meaning given to that term in the Grid Code.

Remaining Period BM Unit Non-Delivered Bid Volume

RQNDB^u_ij

MWh

The quantity determined as such in accordance with Section T4.8.10

The Remaining Period BM Unit Non-Delivered Bid Volume is the amount of Non-Delivered Bid Volume remaining to be allocated to Bid u from BM Unit i in Settlement Period j.

Remaining Period BM Unit Non-Delivered Offer Volume

RQNDO^u_ij

MWh

The quantity determined as such in accordance with Section T4.8.6.

The Remaining Period BM Unit Non-Delivered Offer Volume is the amount of Non-Delivered Offer Volume remaining to be allocated to Offer u from BM Unit i in Settlement Period j.

Replacement Buy Price

RBP_j

£/MWh

The Replacement Buy Price determined in accordance with paragraph 15 of Part 2 of Annex T-1.

Replacement Price

RP_j

£/MWh

Means either the Replacement Buy Price or the Replacement Sell Price as determined in accordance with paragraph 15 of Part 2 of Annex T-1, and Replacement Pricing shall have the same meaning.

Replacement Price Average Reference Volume

RPAR

Has the meaning given to that term in Section T1.11.1.

Replacement Reserve Activation Data

Data (comprising the items set out in Section Q5.6.2) to be submitted by the NETSO pursuant to Section Q6.2C.1(d).

Replacement Reserve Activation Price

RRAP_J

£/MWh

The price associated with a Position.

Replacement Reserve Activation Price forms part of the Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data for each Position and is submitted by the NETSO pursuant to Section Q.

Replacement Reserve Activation Time

Spot time

Has the meaning given to that term in Section Q5.6.1.

Replacement Reserve Aggregated Unpriced System Buy Action

RRAUSB_j

In respect of each Quarter Hour within a Replacement Reserve Auction Period, an aggregated unpriced System Buy Action derived from Replacement Reserve Auction Result Data.

Replacement Reserve Aggregated Unpriced System Sell Action

RRAUSS_j

In respect of each Quarter Hour within a Replacement Reserve Auction Period, an aggregated unpriced System Sell Action derived from Replacement Reserve Auction Result Data.

Replacement Reserve Auction Period

A period of sixty minutes in relation to which Replacement Reserve Auction Result Data is associated pursuant to Section Q5.6 and which period corresponds to two complete Settlement Periods with the start of that Replacement Reserve Auction Period coinciding with the Settlement Period that begins on the hour.

Replacement Reserve Auction Period Resolution Type

Indicates the period of time within the Replacement Reserve Auction Period that the associated Replacement Reserve Activation Data, GB Need Met Data and Interconnector Schedule Data relate to.

A Replacement Reserve Auction Period Resolution Type may be categorised as PT60 which is comprised of a single period of sixty minutes, PT30 which is comprised of two periods of thirty minutes or PT15 which is comprised of four periods of fifteen minutes.

Replacement Reserve Auction Result Data

Data (comprising the items set out in Section Q5.6.1) to be submitted by the NETSO pursuant to Section Q6.2C.1(d).

Replacement Reserve Bid

Has the meaning given to the term TERRE Bid as defined in the Grid Code.

Replacement Reserve Bid Data

In relation to a Replacement Reserve Bid, the data comprising the items set out in the TERRE Data Validation and Consistency Rules (as defined under the Grid Code) to be submitted by the Lead Party of a BM Unit pursuant to Section Q4.3.3 and by the NETSO pursuant to Section Q6.2C.1(d).

Replacement Reserve Bid Price

£/MWh

The price associated with a Replacement Reserve Bid.

Replacement Reserve Instructed Bid Deviation Volume

IBD_ij

MWh

The quantity established in accordance with Section T3.22.2.

The Replacement Reserve Bid Deviation Volume is the volume of Bid, in respect of BM Unit i, in Settlement Period j as a result of all acceptances of a Replacement Reserve Bids in that Settlement Period compared to the volume of Bid determined to be the Total Period Deemed Standard Product Bid Volume for that Settlement Period.

Replacement Reserve Instructed Offer Deviation Volume

IOD_ij

MWh

The quantity established in accordance with Section T3.22.1.

The Replacement Reserve Offer Deviation Volume is the volume of Offer, in respect of BM Unit i, in Settlement Period j as a result of all acceptances of a Replacement Reserve Offers in that Settlement Period compared to the volume of Offer determined to be the Total Period Deemed Standard Product Offer Volume for that Settlement Period.

Replacement Reserve Period Instructed Bid Deviation Cashflow

CDB_ij

£

The cashflow determined in accordance with T3.23.2.

Replacement Reserve Period Instructed Offer Deviation Cashflow

CDO_ij

£/MWh

The amount determined in accordance with T3.23.1.

Replacement Reserve Period Instruction Deviation Cashflow

CDR_ij

£

The cashflow determined in accordance with T3.24.1.

Replacement Sell Price

RSP_j

£/MWh

The Replacement Sell Price determined in accordance with paragraph 15 of Part 2 of Annex T-1.

Replacement-Priced Ranked Set

The Replacement-priced Ranked Set as provided in paragraph 10.4 of Part 1 of Annex T-1.

Reserve Scarcity Price

RSVP_j

£/MWh

In respect of a Settlement Period, the price determined in accordance with Section T3.13.

Residual Cashflow Reallocation Cashflow

RCRC_aj

£

The cashflow determined in accordance with Section T4.10.3.

The Residual Cashflow Reallocation Cashflow is the cashflow to Energy Account a in Settlement Period j resulting from the reallocation the Total System Residual Cashflow.

Residual Cashflow Reallocation Proportion

RCRP_aj

The proportion determined in accordance with Section T4.10.2.

The Residual Cashflow Reallocation Proportion is a fraction expressing the proportion of the Total System Residual Cashflow to be allocated to Energy Account a in Settlement Period j.

RR Schedule

A MW profile constructed by the SAA that provides a baseline for RR Activations with ramping considerations.

This MW profile is processed by Settlement in the same way as Bid-Offer Acceptance but not settled under Bid-Offer Prices.

Run-Down Rate(s)

Has the meaning given to that term in BC1 of the Grid Code.

Run-Up Rate(s)

Has the meaning given to that term in BC1 of the Grid Code.

Secondary BM Unit AMSID Pair Data

Has the meaning given to that term in Section S paragraph 10.1A

Secondary BM Unit Delivered Volume

QVBMD_i2NKji

MWh

The quantity determined in accordance with 7.1.1D Annex S-2.

Secondary BM Unit Supplier Delivered Volume

VBMUSDV_i2ji

MWh

The Secondary BM Unit half hourly Supplier Delivered Volumes determined by the SVAA pursuant to paragraph 9.6.1C of Annex S-2.

Second-Stage Flagged

Second-Stage Flagged in accordance with paragraph 8 of Part 1 of Annex T-1.

Sell Price Price Adjustment

SPAj

£/MWh

The amount sent by the NETSO as the ‘Sell Price Price Adjustment’ in accordance with Section Q6.3.

Settlement Expected Volumes

SEV

MWh

The quantity determined in accordance with 7.3.5 Annex S-2.

Settlement Period

j

A period of thirty minutes beginning on the hour or the half-hour and in accordance with paragraph 4.3 of this Annex X-2.

Settlement Period Duration

SPD

Hours

0.5 hours.

Site Specific Line Loss Factor

A Line Loss Factor established for a single Metering System as provided in Section K1.7.2.

Small Scale Third Party Generating Plant Limit

SSTPGPL

The quantity established in accordance with Section L1.5

The Small Scale Third Party Generating Plant Limit is the maximum generation capacity (measured at the Boundary Point) of the aggregate Small Scale Third Party Generating Plant connected to a Distribution System at a single Boundary Point.

SO-Flagged Ranked Set

One of the SO-Flagged Ranked Sets as provided in paragraph 4 of Part 1 of Annex T-1.

Stable Export Limit

Has the meaning given to that term in BC1 of the Grid Code.

Stable Import Limit

Has the meaning given to that term in BC1 of the Grid Code.

Start Point Demand Control Level

MW

Has the meaning given to that term in Section T3.15(a)(a).

STOR Action

An Accepted Offer derived from a STOR Flagged BOA taken by the NETSO during a STOR Availability Window in order to increase generation or reduce demand.

STOR Action Price

STAP^t_j

£/MWh

In relation to each STOR Action, the price determined in accordance with Section T3.14

STOR Instructed Volume

QSIV^t_j

MWh

The Period Accepted Offer Volume in respect of each STOR Action instructed by the NETSO in order to increase generation or reduce demand.

Submitted Bid-Offer Pair

A Bid-Offer Pair in respect of which the NETSO submits Bid-Offer Data pursuant to Section Q6.2.

Supplier BM Unit Non BM ABSVD

SNBABSVD_ij

MWh

The amount determined by the SVAA pursuant to Annex S-2 paragraph 9.6.1C.

Surplus

SPLD or SPLW

MW

Has the meaning given to that term in OC2 of the Grid Code

SVA (Production) Funding Share

FSPS_pm

Has the meaning given to that term in Section D1.2.1(c).

In relation to a month m, the SVA (Production) Funding Share represents a Party’s proportionate share of aggregate Credited Energy Volumes for Production BM Units for that month.

System Action

w

Has the meaning given to that term in paragraph 1.2 of Annex T-1.

System Action Price

SAP ^w_j

£/MWh

Has the meaning given to that term in paragraph 1.2 of Annex T-1.

System Buy Action

QSB^w_j

MWh

Has the meaning given to that term in paragraph 1.2 of Annex T-1.

System Buy Price

SBP_j

£/MWh

The price determined in accordance with Section T4.4.2.

System Demand Control Volume

QSDC_cj

MWh

Has the meaning given to it in Section T3.15.3(a).

System Operator Cashflow

CSO_j

£

The amount determined in accordance with Section T4.9.1.

The System Operator Cashflow is the amount paid by or to the System Operator in Settlement Period j in relation to the settlement of the Balancing Services.

System Sell Action

QSS^w_j

MWh

Has the meaning given to that term in paragraph 1.2 of Annex T-1.

System Sell Price

SSP_j

£/MWh

The price determined in accordance with Section T4.4.3.

System Warning

Has the meaning given to that term in BC1 of the Grid Code.

System Zone

Has the meaning given to that term in the Grid Code.

TLM-adjusted BM Unit Chargeable Demand

TCBMUD_ij

MWh

The amount determined in accordance with Section T8.1.3.

Total Instantaneous Out-Turn Generation

MW

The total instantaneous generation metered by the NETSO in accordance with CC6.5.6 of the Grid Code.

Total Metered Capacity

MW

The total value of the Registered Capacity of all Power Park Modules metered by the NETSO in accordance with CC6.5.6 of the Grid Code.

Total AMSID Pair Delivered Volume

TAPDVj

MWh

The amount determined in accordance with Annex S-2 3.11.3.

Total MSID Pair Delivered Volume

TMPDVj

MWh

The amount determined in accordance with Annex S-2 3.10.1B.

Total Output Usable

MW

Means the sum of Output Usables (as defined in the Grid Code) excluding (unless expressly stated otherwise in the Code) expected Interconnector transfer capacity.

Total Period Applicable Balancing Services Volume

TQAS_j

MWh

The amount determined in accordance with Section T4.6.5.

The Total Period Applicable Balancing Services Volume is the net quantity of energy associated with delivery of Applicable Balancing Services by all BM Units in Settlement Period j.

Total Period Deemed Standard Product Bid Volume

TDSPB_ij

MWh

The quantity established in accordance with Section T3.21.2.

The Total Period Deemed Standard Product Bid Volume is the volume of Bid, accepted in respect of BM Unit i, in Settlement Period j as a result of all acceptances of a Replacement Reserve Bid in that Settlement Period.

Total Period Deemed Standard Product Offer Volume

TDSPO_ij

MWh

The quantity established in accordance with Section T3.21.1.

The Total Period Deemed Standard Product Offer Volume is the volume of Offer, accepted in respect of BM Unit i, in Settlement Period j as a result of all acceptances of a Replacement Reserve Bid in that Settlement Period.

Total Period Out-Turn Generation

MW

In respect of a Settlement Period, the total generation for that Settlement Period as metered by the NETSO in accordance with CC6.5.6 of the Grid Code.

Total Specified BSC Charges

TSC_pm

£

The sum of the Specified BSC Charges for Trading Party p relating to month m.

Total System Cashflow

TCBM_j

£

The amount determined in accordance with Section T3.12.1.

The Total System Cashflow is the total payments and charges in respect of settlement of Balancing Services action for all BM Units, disregarding any Non-Delivered Offer Charges and Non-Delivered Bid Charges.

Total System Energy Imbalance Cashflow

TCEI_j

£

The amount determined in accordance with Section T4.7.2.

The Total System Energy Imbalance Cashflow is the total cashflow resulting from the Settlement of Energy Imbalances, summed over all Energy Accounts in Settlement Period j.

Total System Energy Imbalance Volume

TQEI_j

MWh

The quantity determined in accordance with Section T4.6.4.

Total System Energy Imbalance Volume is the sum over all Energy Accounts of the Account Energy Imbalance Volume..

Total System Information Imbalance Charge

TCII_j

£

The amount determined in accordance with Section T4.3.7.

The Total System Information Imbalance Charge is the total charge for information imbalances, summed over all BM Units in Settlement Period j.

Total System Non-Delivery Charge

TCND_j

£

The amount determined in accordance with Section T4.8.14.

The Total System Non-Delivery Charge is the BM Unit Period Non-Delivery Charge summed over all BM Units in Settlement Period j.

Total System Residual Cashflow

TRC_j

£

The amount determined in accordance with Section T4.10.1.

The Total System Residual Cashflow is the surplus or deficit of funds remaining to be reallocated after the Settlement of Energy Imbalances, Information Imbalances, the Balancing Mechanism (including non-delivery) and the System Operator BM Charge.

Total System RR Cashflow

TCRR_j

£

The amount determined in accordance with Section T3.25.1.

The Total System RR Cashflow is the summation of Quarter Hour RR Cashflow (CRR_iJ) across all BM Units i and across both Quarter Hours J falling within a given Settlement Period j.

Trading Unit Delivery Mode

A flag identifying whether a Trading Unit was a delivering Trading Unit or an offtaking Trading Unit determined in accordance with Section T6.1.3.

Trading Unit Export Volume

QTUE_rj

MWh

The volume determined in accordance with Section T6.1.1.

Trading Unit Import Volume

QTUI_rj

MWh

The volume determined in accordance with Section T6.1.2.

Transmission Energy

MWh

The integral with respect to time of National Demand.

Transmission Loss Factor

TLF_ij

The factor specified in Section T2.2.1(a).

The Transmission Loss Factor is that factor used to allocate transmission losses on a locational basis to BM Unit i in Settlement Period j.

Transmission Loss Factor Adjustment

TLFA_S

The value determined in accordance with paragraph 9.1 of Annex T-2.

The Transmission Loss Factor Adjustment is the value calculated to ensure that, as far as possible, the Adjusted Seasonal Zonal TLF (ATLF_ZS) values have a zero net aggregate effect on Delivering Transmission Losses Adjustment (TLMO⁺_j) values.

Transmission Loss Multiplier

TLM_ij

The multiplier calculated in accordance with Section T2.3.1(a) or (b).

The Transmission Loss Multiplier is the factor applied to BM Unit i in Settlement Period j in order to adjust for Transmission Losses.

Transmission System Demand

Has the meaning given to the term National Electricity Transmission System Demand as defined in the Grid Code.

Transmission System Frequency

Hertz

The Frequency of the Transmission System.

Unsubmitted Bid-Offer Pair

Has the meaning given to that term in Section T3.4B.2.

Utilisation Price

£/MWh

The amount sent by the NETSO as a utilisation payment in respect of a STOR Action which:

(i) in relation to a BM STOR Action shall be the Offer Price; and

(ii) in relation to a Non-BM STOR Action shall be the Balancing Services Adjustment Cost.

Value of Lost Load

VoLL

£/MWh

Has the meaning given to it in Section T1.12.1.

Working Day Credit Assessment Load Factor

WDCALFi

Is defined in Annex X-1.

The factor is used to establish the BM Unit Credit Assessment Export Capability and BM Unit Credit Assessment Import Capability for BM Unit i on a CALF Working Day determined for the purposes of Credit Assessment Load Factor.

Zonal Transmission System Demand

The forecast quantity of Transmission System Demand in a BMRS Zone.

AEI_p

MWh

Actual Energy Indebtedness

BEDP_j

£/MWh

Balancing Energy Deviation Price

BMCAEC_i

MW

BM Unit Credit Assessment Export Capability

BMCAIC_i

MW

BM Unit Credit Assessment Import Capability

BMUADDV_ij

MWh

BM Unit Allocated Demand Disconnection Volume

BMUADV_ij

MWh

BM Unit Allocated Demand Volume

BOLRⁿ_ij(t)

MW

Bid-Offer Lower Range

BOURⁿ_ij(t)

MW

Bid-Offer Upper Range

BPA_j

£/MWh

Buy Price Price Adjustment

BSAP^m_j

£/MWh

Balancing Services Adjustment Price

CAD^k_i

Minutes

Continuous Acceptance Duration

CADL

Minutes

Continuous Acceptance Duration Limit

CAEI_aj

£

Account Energy Imbalance Cashflow

CAEI_p

£

Daily Party Energy Imbalance Cashflow

CALF_i

Credit Assessment Load Factor

CAP

£/MWh

Credit Assessment Price

CAQCE_iaj

MWh

Credit Assessment Credited Energy Volume

CBM_ij

£

Period BM Unit Cashflow

CBM_p

£

Daily Party BM Unit Cashflow

CBMUD_ij

MWh

BM Unit Chargeable Demand

CBⁿ_ij

£

Period BM Unit Bid Cashflow

CCEC_p

£

Credit Cover Error Compensation

CC_p

£

Credit Cover

CCP_pj

%

Credit Cover Percentage

CCR_iJ

Quarter Hour RR Cashflow

CDB_ij

£

Replacement Reserve Period Instructed Bid Deviation Cashflow

CDO_ij

£/MWh

Replacement Reserve Period Instructed Offer Deviation Cashflow

CDR_ij

£

Replacement Reserve Period Instruction Deviation Cashflow

CDR_p

£

Daily Party RR Instruction Deviation Cashflow

CEI_pj

MWh

Credit Assessment Energy Indebtedness

CGCAEI_aj

£

Claim Group non-corrected Account Energy Imbalance Cashflow

CII_ij

£

Information Imbalance Charge

CII_p

£

Daily Party Information Imbalance Charge

CNDBⁿ_ij

£

Non-Delivered Bid Charge

CND_ij

£

BM Unit Period Non-Delivery Charge

CNDOⁿ_ij

£

Non-Delivered Offer Charge

CND_p

£

Daily Party Non-Delivery Charge

COⁿ_ij

£

Period BM Unit Offer Cashflow

CORC_iNj

MWh

Corrected Component

CORABSVDC_i2Nj

Corrected MSID ABSVD Component

CRR_ij

£

Period RR BM Unit Cashflow

CRR_p

£

Daily Party RR Cashflow

CSO

£

Daily System Operator BM Cashflow

CSO_j

£

System Operator BM Cashflow

DMAT

MWh

De Minimis Acceptance Threshold

DSPB^J_ij

MWh

Period Deemed Standard Product Bid Volume

DSPO^J_ij

MWh

Period Deemed Standard Product Offer Volume

ECA_pj

£

Credit Cover Error Interest Amount

ECB_pj

£

Credit Cover Error Imbalance Amount

ECC_p

MWh

Energy Credit Cover

ECQ_zabj

MWh

Energy Contract Volume

EEI_pj

MWh

Erroneous Energy Indebtedness

EI_pj

MWh

Energy Indebtedness

f

Point Value Identification Number

^fFPN_ijt

MW

Point FPN

FLAG_pj

Credit Cover Error Erroneous Rejection Flag

FPN_ij

MWh

Period FPN

FPN_ij(t)

MW

FPN

^fqBOⁿ_ijt

MW

Point Bid-Offer Volume

FSG_pm

General Funding Share

FSM_pm

Main Funding Share

FSPS_pm

SVA (Production) Funding Share

i

BM Unit Identification Number

IBD_ij

MWh

Replacement Reserve Instructed Bid Deviation Volume

ICBⁿ_ij

£

Indicative Period Balancing Mechanism Bid Cashflow

ICOⁿ_ij

£

Indicative Period Balancing Mechanism Offer Cashflow

IECC_p

MWh

Initial Energy Credit Cover

IIP_j

£/MWh

Information Imbalance Price

IMBALNGC

MW

Indicated Imbalance

IMV_j

MWh

Interconnector Metered Volume

INDDEM

MW

Indicated Demand

INDGEN

MW

Indicated Generation

INDO

MW

Initial National Demand Out-Turn

INIV_j

MWh

Indicative Net Imbalance Volume

IOD_ij

MWh

Replacement Reserve Instructed Offer Deviation Volume

IQABⁿ_ij

MWh

Indicative Period BM Unit Total Accepted Bid Volume

IQAOⁿ_ij

MWh

Indicative Period BM Unit Total Accepted Offer Volume

ISBP_j

£/MWh

Indicative System Buy Price

ISSP_j

£/MWh

Indicative System Sell Price

ITSDO

MW

Initial Transmission System Demand Out-Turn

j

Settlement Period

k

Bid-Offer Acceptance Number

LLFC

Line Loss Factor Class

LoLP_j

Final Loss of Load Probability

m

Balancing Services Adjustment Action

MAQCE_iaj

MWh

Metered Credit Assessment Credited Energy Volume

MDC_m

£

Monthly Default Costs

MEI_pj

MWh

Metered Energy Indebtedness

MELNGC

MW

Indicated Constraint Boundary Margin

MNMC_m

£

Monthly Net Main Costs

MPDV

MWh

MSID Pair Delivered Volume

MP_j

Market Price

MPSC_m

£

Monthly Production-Charging SVA Costs

n

Bid-Offer Pair Number

NCBMUDij

MWh

Period BM Unit Non Chargeable Demand

NDPBⁿ_ij

£/MWh

Non-Delivered Bid Price

NDPOⁿ_ij

£/MWh

Non-Delivered Offer Price

NIV_j

MWh

Net Imbalance Volume

NTEBVA_j

MWh

NIV Tagged EBVA

NTESVA_j

MWh

NIV Tagged ESVA

NUEBVA_j

MWh

NIV Untagged EBVA

NUESVA_j

MWh

NIV Untagged ESVA

NWDCALF_i

Non-Working Day Credit Assessment Load Factor

OCNMFD

MW

Generating Plant Demand Margin (daily value)

OCNMFW

MW

Generating Plant Demand Margin (weekly value)

PAR

MWh

Price Average Reference Volume

PBⁿ_ij

£/MWh

Bid Price

POⁿ_ij

£/MWh

Offer Price

PXP_sj

£/MWh

Market Index Price

QABC_aj

MWh

Account Bilateral Contract Volume

QAB^kn_ij

MWh

Period Accepted Bid Volume

qAB^kn_ij(t)

MW

Accepted Bid Volume

QABⁿ_ij

MWh

Period BM Unit Total Accepted Bid Volume

qABO^kn_ij(t)

MW

Accepted Bid-Offer Volume

QABS_aj

MWh

Account Period Balancing Services Volume

QACE_aj

MWh

Account Credited Energy Volume

QAEI_aj

MWh

Account Energy Imbalance Volume

qA^k_ij(t)

MW

Acceptance Volume

qA^k_it

MW

Point Acceptance Volume

QAO^kn_ij

MWh

Period Accepted Offer Volume

qAO^kn_ij(t)

MW

Accepted Offer Volume

QAOⁿ_ij

MWh

Period BM Unit Total Accepted Offer Volume

QAS_ij

MWh

BM Unit Applicable Balancing Services Volume Data or BM Unit ABSVD

QBDC_cj

MWh

Balancing Demand Control Volume

qBOⁿ_ij(t)

MW

Bid-Offer Volume

QBSAB^m_j

MWh

Balancing Services Adjustment Buy Volume

QBSA^m_j

MWh

Balancing Services Adjustment Volume

QBSAS^m_j

MWh

Balancing Services Adjustment Sell Volume

QBSD_ij

MWh

Period Supplier BM Unit Delivered Volume

QBS_ij

MWh

Period BM Unit Balancing Services Volume

QCE_iaj

MWh

Credited Energy Volume

QDD_ij

MWh

Period BM Unit Demand Disconnection Volume

qDSPB^J_ij(t)

MW

Deemed Standard Product Bid Volume

qDSP^J_ij(t)

MW

Deemed Standard Product Shape

qDSP^J_ijt

MW

Deemed Standard Product Point Variables

qDSPO^J_ij(t)

MW

Deemed Standard Product Offer Volume

qDSPV^J_ij(t)

MW

Deemed Standard Product Volume

QNGSIA_ij

MWh

Network Gas Supply Imbalance Adjustment Volume

QII_ij

MWh

Period Information Imbalance Volume

QME_ij

MWh

Period Expected Metered Volume

QMFR_iaj

MWh

Metered Volume Fixed Reallocation

QMFR_ziaj

MWh

Metered Volume Reallocation Fixed Data

QM_ij

MWh

BM Unit Metered Volume

QMPR_iaj

%

Metered Volume Percentage Reallocation

QMPR_ziaj

%

Metered Volume Reallocation Percentage Data

QNDB_ij

MWh

Period BM Unit Non-Delivered Bid Volume

QNDBⁿ_ij

MWh

Bid Non-Delivery Volume

QNDO_ij

MWh

Period BM Unit Non-Delivered Offer Volume

QNDOⁿ_ij

MWh

Offer Non-Delivery Volume

QSB^w_j

System Buy Action

QSDC_cj

MWh

System Demand Control Volume

QSD_{ij or} QSD_i2j

MWh

Period Secondary BM Unit Delivered Volume

QSD_iji2

MWh

Period Secondary BM Unit Supplier Delivered Volume

QSIV^t_j

MWh

STOR Instructed Volume

QSND_ij

MWh

Period Secondary BM Unit Non-Delivered Volume

QSS^w_j

System Sell Action

QTUE_rj

MWh

Trading Unit Export Volume

QTUI_rj

MWh

Trading Unit Import Volume

QVBMD_i2NKij

MWh

Secondary BM Unit Delivered Volume

QXP_sj

MWh

Market Index Volume

RBP_j

£/MWh

Replacement Buy Price

RCRC_aj

£

Residual Cashflow Reallocation Cashflow

RCRC_p

£

Daily Party Residual Settlement Cashflow

RCRP_aj

No Units

Residual Cashflow Reallocation Proportion

REJ_aj

MWh

Credit Cover Error Rejection Volume

RPAR

Replacement Price Average Reference Volume

RP_j

£/MWh

Replacement Price

RQNDB^u_ij

MWh

Remaining Period BM Unit Non-Delivered Bid Volume

RQNDO^u_ij

MWh

Remaining Period BM Unit Non-Delivered Offer Volume

RRAB^kn_ij

MWh

Period RR Accepted Bid Volume

RRABⁿ_ij

MWh

Period RR Total Accepted Bid Volume

RRAO^kn_ij

MWh

Period RR Accepted Offer Volume

RRAOⁿ_ij

MWh

Period RR Total Accepted Offer Volume

RRAP_J

£/MWh

Replacement Reserve Activation Price

RRAUSB_j

Replacement Reserve Aggregated Unpriced System Buy Action

RRAUSS_j

Replacement Reserve Aggregated Unpriced System Sell Action

RRAV_iJ

MWh

Quarter Hour RR Activated Volume

RSP_j

£/MWh

Replacement Sell Price

RSVP_j

£/MWh

Reserve Scarcity Price

SAP^w_j

System Action Price

SBP_j

£/MWh

System Buy Price

SNBABSVD_ij

MWh

Supplier BM Unit Non BM ABSVD

SPA_j

£/MWh

Sell Price Price Adjustment

SPBMEI_aij

MWh

Settlement Period BM Unit Energy Indebtedness

SPD

h

Settlement Period Duration

SP_iji2

MWh

Period Secondary BM Unit Delivered Proportion

SPLD

MW

Surplus (daily value)

SPLW

MW

Surplus (weekly value)

SSP_j

£/MWh

System Sell Price

SSTPGPL

Small Scale Third Party Generating Plant Limit

STAP^t_j

£/MWh

STOR Action Price

TCBM_j

£

Total System BM Cashflow

TCBMUDij

MWh

TLM-adjusted BM Unit Chargeable Demand

TCEI_j

£

Total System Energy Imbalance Cashflow

TCII_j

£

Total System Information Imbalance Charge

TCND_j

£

Total System Non-Delivery Charge

TCRR_j

£

Total System RR Cashflow

TDSPB_ij

MWh

Total Period Deemed Standard Product Bid Volume

TDSPO_ij

MWh

Total Period Deemed Standard Product Offer Volume

TNGSB_i

£

Network Gas Supply Total Bid Payment

T^k_it

Spot time

Bid-Offer Acceptance Time

TLFA_S

Transmission Loss Factor Adjustment

TLF_ij

Transmission Loss Factor

TLM_ij

No Units

Transmission Loss Multiplier

TLMO⁺_j

Delivering Transmission Losses Adjustment.

TLMO^-_j

Offtaking Transmission Losses Adjustment

TQAS_j

MWh

Total Period Applicable Balancing Services Volume

TQEI_j

MWh

Total System Energy Imbalance Volume

TRC_j

£

Total System Residual Cashflow

TSC_pm

£

Total Specified BSC Charges

u

Non-Delivery Order Number

VBMUSDV_i2ij

MWh

Secondary BM Unit Supplier Delivered Volume

VoLL

£/MWh

Value of Lost Load

w

System Action

WDCALF_i

Working Day Credit Assessment Load Factor

a

refers to a Data Aggregator or, as the context may require in paragraph 3.5 of Annex S-2, to a Data Aggregator appointed by a Primary Supplier against a Primary SVA Metering System Number and a Data Aggregator appointed by an associated Secondary Supplier against a Secondary SVA Metering System Number;

a1

refers to a Data Aggregator appointed by a Primary Supplier against a Primary SVA Metering System Number K1;

a1.1

refers to a Data Aggregator appointed by a Primary Supplier against a Primary SVA Metering System Number K1.1;

an

refers to a Data Aggregator appointed by a Secondary Supplier against a Secondary SVA Metering System Number Kn;

an.1

refers to a Data Aggregator appointed by a Secondary Supplier against a Secondary SVA Metering System Number Kn.1;

(aa)

refers to an Analysis Class;

(ai)

refers to an Adjusted Interval;

j

refers to a Settlement Period;

i

refers to a BM Unit;

i2

refers to a Secondary BM Unit (where applicable);

(nn)

refers to an individual value of the Regression Coefficient (RC) or of the Matrix of Regression Coefficients (MRC), according to the context;

(vv)

refers to a Consumption Component Class (not for line losses) associated with Consumption Component Class N;

(vvn)

refers to a Consumption Component Class (not for line losses) associated with Consumption Component Class N for which the data aggregation type is ‘N’;

q

refers to a calendar quarter;

d(q)

refers to the number of days in a calendar quarter;

C

refers to a Standard Settlement Configuration;

G

refers to a Supplier Volume Reporting Group;

H

refers to a GSP Group;

J

refers to a Settlement Register;

K

Refers to a Metering System associated with an SVA Non-Final Demand Facility; and refers to an SVA Metering System Number and/or Asset Metering System associated with the provision of a Balancing Service;

K1

refers to a Primary SVA Metering System Number;

K1.1

refers to the "virtual" Primary SVA Metering System Number where Section K2.5.4(c)(ii) applies to the Primary Supplier;

Kn

refers to a Secondary SVA Metering System Number;

Kn.1

refers to the "virtual" Secondary SVA Metering System Number where Section K2.5.4(c)(ii) applies to the Secondary Supplier;

L

refers to a Line Loss Factor Class;

N

refers to a Consumption Component Class;

N(c)

refers to a non half hourly active import Consumption Component Class;

P

refers to a Profile Class;

Q

refers to a Profile;

R

refers to a valid combination of Time Pattern Regime and Standard Settlement Configuration;

T

refers to a Settlement Day;

X

refers to a Time Pattern Regime;

Y

refers to a calendar year;

Z

refers to a Supplier or, as the context may require in paragraph 3.5 of Annex S-2, to the Suppliers acting in the capacity of Primary Supplier and associated Secondary Supplier(s) in respect of a particular Shared SVA Metering System;

Z1

refers to a Supplier acting in the capacity of Primary Supplier in respect of a Shared SVA Metering System; and

Zn

refers to a Supplier acting in the capacity of Secondary Supplier in respect of a Shared SVA Metering System.

Σ_a

=

summed over all Data Aggregators (a);

Σ_(ai)

=

summed over all Adjusted Intervals ((ai)) associated with the spot time in question for all Time Pattern Regimes associated with a particular Standard Settlement Configuration;

Σ_j

=

summed over all Settlement Periods;

Σ_N

=

summed over all Consumption Component Classes (N) where, in such summation, values associated with Consumption Component Classes associated with Third Party Generating Plant comprised in SVA Metering Systems shall be subtracted and values associated with all other Consumption Component Classes shall be added, except in the case of Σ_N(AA) and Σ_N(EAC) for the purposes of Annex S-1 paragraph 2;

Σ_N(n)

=

summed over all those Consumption Component Classes (N) for which the data aggregation type is ‘N’ and where, in such summation, values associated with Consumption Component Classes associated with Third Party Generating Plant comprised in SVA Metering Systems shall be subtracted and values associated with all other Consumption Component Classes shall be added;

Σ_T

=

summed over all Settlement Days (T) in a particular Meter Advance Period;

Σ_Z

=

summed over all Suppliers (Z);

Σ^K_J

=

summed over all Settlement Registers (J) in a particular SVA Metering System (K);

Σ_K^NonDiff

=

summed over all Asset Metering Systems “K” allocated to a BM Unit in accordance with paragraph S10.1A.2(e)(i)

Σ_K^Diff

=

summed over all Asset Metering Systems “K” allocated to a BM Unit in accordance with paragraph S10.1A.2(e)(ii)

Σ^NL_K

=

summed over all SVA Metering Systems (K) within a particular Line Loss Factor Class (L) and Consumption Component Class (not for line losses) (N);

Σ^(vv)L_K

=

summed over all SVA Metering Systems (K) within a Line Loss Factor Class (L) and Consumption Component Class (for line losses) associated with a particular Consumption Component Class (not for line losses) ((vv));

Σ^(vv)_LK

=

summed over all Line Loss Factor Classes (L) and Metering Systems K within a Consumption Component Class (for losses) associated with a particular Consumption Component Class (not for losses) ((vv));

Σ^N_LPR

=

summed over all kWh readings within a Settlement Class (LPR) itself within a particular Consumption Component Class (N);

Σ^N(n)_LPR

=

summed over all kWh readings within a Settlement Class (LPR) itself within a particular Consumption Component Class (N) for which the data aggregation type is ‘N’;

Σ^(vv)_L

=

summed over all Line Loss Factor Classes (L) within a Consumption Component Class (for losses) associated with a particular Consumption Component Class (not for losses) ((vv));

Σ^(vvn)_L

=

summed over all Line Loss Factor Classes (L) within a Consumption Component Class (for losses) associated with a particular Consumption Component Class (not for line losses) for which the data aggregation type is ‘N’ ((vvn));

Σ^(vv)_PR

=

summed over all Profile Classes (P) and Time Pattern Regimes within Standard Settlement Configuration (R) within a Consumption Component Class (for losses) associated with a particular Consumption Component Class (not for losses) ((vv));

Σ^(vvn)_PR

=

summed over all Profile Classes (P) and Time Pattern Regimes within Standard Settlement Configuration (R) within a Consumption Component Class (for losses) associated with a particular Consumption Component Class (not for line losses) for which the data aggregation type is ‘N’ ((vvn));

Σ^HZLPR_K

=

summed over all non half hourly SVA Metering Systems (K) by Settlement Class (HLPR) for a particular Supplier (Z); and

Σ^H_Z

=

summed over all Suppliers (Z) active within a particular GSP Group (H).

Σ_ON

=

summed over all Settlement Periods in a Settlement Day for which the Modified Switched Load State Indicator (SQNEW_Cj) has been determined as equal to one by the Supplier Volume Allocation Agent;

Σ_OFF

=

summed over all Settlement Periods in a Settlement Day for which the Modified Switched Load State Indicator (SQNEW_Cj) has been determined as equal to zero by the Supplier Volume Allocation Agent;

Σ_N(AA)

=

summed over all Consumption Component Classes N that are associated with Annualised Advances;

Σ_N(EAC)

=

summed over all Consumption Component Classes N that are associated with Estimated Annual Consumptions;

Σ^m_d

=

summed over all Settlement Days in a month

Σ_N(HHA)

=

summed over all Consumption Component Classes that are associated with actual values and with half hourly data aggregation in relation to Metering Systems which are 100kW Metering Systems save those which are associated with SVA Generation and SVA Generation line losses;

Σ_N(HHE)

=

summed over all Consumption Component Classes that are associated with estimated values and with half hourly data aggregation in relation to Metering Systems which are 100kW Metering Systems save those which are associated with SVA Generation and SVA Generation line losses.

Σ^H_i

=

summed over all Supplier BM Units (i) associated with a particular GSP Group (H);

Σ^HZ_i

=

summed over all Supplier BM Units (i) associated with a particular GSP Group (H) and Supplier (Z);

Σ^HPR_ZL

=

summed over all Suppliers (Z) and Line Loss Factor Classes (L) for Standard Settlement Configuration and Time Pattern Regime combination (R) in Profile Class (P) within GSP Group (H);

Σ^HPR_T

=

summed over all Settlement Days (T) contained within the Calculation Period for which one or more values of TAA_HZLPR was determined for Standard Settlement Configuration and Time Pattern Regime combination (R) in Profile Class (P) within GSP Group (H);

Σ^HPC_R

=

summed over all Standard Settlement Configuration and Time Pattern Regime combinations (R) valid for Standard Configuration (C) and Profile Class (P) within GSP Group (H);

Σ^HPCT_R

=

summed over all Standard Settlement Configuration and Time Pattern Regime combinations (R) valid for Standard Settlement Configuration (C) in Profile Class (P) within GSP Group (H) for Settlement Day (T);

Σ^HPC_ZL

=

summed over all Suppliers (Z) and Line Loss Factor Classes (L) for any one valid combination of Standard Settlement Configuration and Time Pattern Regime for Standard Settlement Configuration (C) in Profile Class (P) within GSP Group (H);

Σ^HPT_C

=

summed over all Standard Settlement Configurations (C) for Profile Class (P) within GSP Group (H) for Settlement Day (T);

Σ^HP_T

=

summed over all Settlement Days (T) for Profile Class (P) within GSP Group (H).

Σ_N(AI)

=

summed over all Consumption Component Classes N that are associated with active import.

Σ^ZqG

=

summed by Supplier (Z) over a calendar quarter (q) by Supplier Volume Reporting Group (G);

K1_HPC and K2_HPC

Numbers

Baseload Profile Consumption during the ‘on’ and ‘off’ periods respectively of switched load Time Pattern Regimes for a valid Standard Settlement Configuration associated with switched load, determined pursuant to paragraph 6.6 of Annex S-2.

SIX_PM

Minutes

The time duration from the start of the Settlement Day to 1800 hours Greenwich Mean Time on that Settlement Day, determined pursuant to paragraph 6.5 of Annex S-2.

ABSVD BM Unit Delivered Volume

AQVMD_NLKji

MWh

The quantity determined in accordance with paragraph 7.1.1E of Annex S-2.

Adjusted Interval

A period of time associated with a particular Time Pattern Regime based on a time period for which the associated Settlement Registers record Metered Data and determined pursuant to paragraph 6.4 of Annex S-2.

Adjusted Interval End Time

A time associated with a particular Time Pattern Regime and Standard Settlement Configuration determined pursuant to paragraph 6.4 of Annex S-2.

Adjusted Interval Start Time

A time associated with a particular Time Pattern Regime and Standard Settlement Configuration determined pursuant to paragraph 6.4 of Annex S-2.

Allocated BM Unit’s Demand Disconnection Volume

ABDD_iaNLKj

kWh

The half hour Demand Disconnection volume of a Metering System determined pursuant to paragraph 3.8 of Annex S-2.

Allocated BM Unit’s Metering System Metered Consumption

ABMMMC_iaNLKj

kWh

The half hour metered Consumption of a Metering System determined pursuant to paragraph 3.6 of Annex S-2.

Allocated Metering System Metered Consumption

AVMMC_HZaNLKji

MWh

The quantity determined in accordance with paragraph 3.9.2 of Annex S-2.

The Allocated Metering System Metered Consumption is the Half Hourly metered volume per Settlement Period of SVA Metering Systems

Allocated Asset Metering System Metered Consumption

AAVMMC_HNLKj

kWh

The quantity determined in accordance with paragraph 3.9.2A of Annex S-2.

The Allocated Asset Metering System Metered Consumption is the Half Hourly metered volume per Settlement Period of Asset Metering Systems

”AMSID Declaration Boundary Point Export”

ADBPE_Di

kWh

The quantity determined in accordance with paragraph 3.11.2 of Annex S-2.

The AMSID Declaration Boundary Point Export” is the total metered Line Loss Adjusted Export for an EMR AMSID Declaration.

”AMSID Declaration Boundary Point Import”

ADBPI_Dj

kWh

The quantity determined in accordance with paragraph 3.11.2 of Annex S-2.

The AMSID Declaration Boundary Point Import” is the total metered Line Loss Adjusted Import for an EMR AMSID Declaration.

”AMSID Declaration Generation Export”

ADGE_Dj

kWh

The quantity determined in accordance with paragraph 3.11.2 of Annex S-2.

The AMSID Declaration Generation Export” is the total metered Line Loss Adjusted Export from a Generator or Storage Facility for an EMR AMSID Declaration.

”AMSID Declaration Generation Import”

ADGI_Dj

kWh

The quantity determined in accordance with paragraph 3.11.2 of Annex S-2.

The AMSID Declaration Generation Import” is the total metered Line Loss Adjusted Import to a Generator or Storage Facility for an EMR AMSID Declaration.

”AMSID Declaration Non‑Chargeable Proportion”

ADNCP_Dj

kWh

The quantity determined in accordance with paragraph 3.11.2 of Annex S-2.

The AMSID Declaration Non‑Chargeable Proportion is a number between 0.0 and 1.0 inclusive representing the proportion of Boundary Point Imports to the Import MSIDs included in the Declaration that are deemed Non-Chargeable in that Settlement Period

Asset Metering System Metered Consumption

AMMC _Kj

kWh

The half hourly metered Consumption for a SVA Metering System, determined pursuant to paragraph 3.5 of Annex S-2.

Asset Metering System Metered Consumption

VMMC _HNLKj

MWhkWh

The Metering System Metered Consumption for an Asset Metering System, determined pursuant to paragraph 7.1.1C of Annex S-2.

Allocated Supplier’s Demand Disconnection Volume

ASDD_HZaNLKj

kWh

The half hour Demand Disconnection volume of a SVA Metering System determined pursuant to paragraph 3.7 of Annex S-2.

Allocated Supplier’s Metering System Metered Consumption

ASMMC_HZaNLKj

kWh

The half hour metered Consumption of a SVA Metering System determined pursuant to paragraph 3.5 of Annex S-2.

AMSID Pair Data

The data comprising the data items pursuant to Section S10.1A

AMSID Pair Delivered Volume

AMPDV_j

MWh

AMSID Pair Delivered Volume is such volumes of Active Energy notified by the Virtual Lead Party in relation to an AMSID Pair and each Associated MSID Pair for the purposes of aggregating Secondary BM Unit Supplier Delivered Volume (VBMUSDV_iZj)

Alternative Average Fraction of Yearly Consumption

AAFYC_HPC

A value set from time to time by the Panel for one or more multi‑register Standard Settlement Configurations, and used in place of the corresponding Average Fraction of Yearly Consumption value for the purpose of calculating profile coefficients pursuant to paragraph 5.1 of Annex S-2.

Analysis Class

A combination of Season Type and Day Type.

Annual Fraction of Yearly Consumption Adjustment

AFYCA_HPC

The difference due to rounding between unity and the sum of the Unadjusted Average Fraction of Yearly Consumption Values for a Standard Settlement Configuration and Profile Class within a GSP Group, determined pursuant to paragraph 5.1 of Annex S-2.

Annualised Advance

AA_KR

kWh

An estimation of the Meter Advance on a Settlement Register over a period of a year determined pursuant to paragraph 4.3 of Annex S-2.

Annualised Advance Adjustment Factor

AAAF_KR

Number

A factor used in the determination of Estimated Annual Consumption and determined pursuant to paragraph 4.3 of Annex S-2.

Asset Meter Register Consumption

AMRC_KJj

kWh

The half hourly metered Consumption for a Settlement Register within an Asset Metering System.

Average Fraction Of Yearly Consumption

AFYC_HPR

An estimate of the fraction of the total Consumption of a multi-register Standard Settlement Configuration attributable to each Settlement Register of that Standard Settlement Configuration pursuant to paragraph 4.4 of Annex S-2.

Base Fraction

BF_HPC

Number

The deemed proportion of Consumption for a Switched Load Metering System which is baseload determined pursuant to paragraph 6.6 of Annex S-2.

Baseload Profile

The half-hourly profile of all non-switched loads in the Profile Class population, including non-switched loads taken during the periods when the switched load registers are recording Consumption and referred to in paragraph 6.6 of Annex S-2.

Baseload Profile Coefficient

BAP_HQj

Number

One of the Basic Period Profile Coefficients which correspond to the Baseload Profile associated with a Switched Load Metering System, determined pursuant to paragraph 6.6 of Annex S-2.

Basic Period Profile Coefficient

P_HQj

Number

A number determined pursuant to paragraph 6.5 of Annex S-2 and representing the fraction of annual Consumption in a given Settlement Period for a particular profile.

BM Unit Allocated Demand Disconnection Volume

BMUADDV_ij

MWh

The disconnection volume per Settlement Period for a Supplier BM Unit determined pursuant to paragraph 9.6.1A of Annex S-2.

BM Unit Allocated Demand Volume

BMUADV_ij

MWh

The energy volume per Settlement Period for a Supplier BM Unit determined pursuant to paragraph 9.6.1 of Annex S-2.

BM Unit Disconnection Matrix

BMDM_iaLPR

A matrix of data as determined pursuant to paragraph 8.2 of Annex S-2.

BM Unit Purchase Matrix

BMPM_iaLPR

A matrix of data as determined pursuant to paragraph 8.1 of Annex S-2.

BM Unit’s Demand Disconnection Volume

BMDD_iaNj

MWh

The half hourly Demand Disconnection volume, determined by a Half Hourly Data Aggregator pursuant to paragraph 3.8 of Annex S-2, or by the SVAA pursuant to paragraph 7.1 of Annex S-2.

BM Unit’s Demand Disconnection Volume (Losses)

BMDDL_iaNj

MWh

The line losses determined by a Half Hourly Data Aggregator as resulting from the BM Unit’s Demand Disconnection Volume pursuant to paragraph 3.8 of Annex S-2, or by the SVAA pursuant to paragraph 7.2 of Annex S-2.

BM Unit’s Metered Consumption

BMMC_iaNLj

MWh

The half hourly metered Consumption, determined by a Half Hourly Data Aggregator pursuant to paragraph 3.6 of Annex S-2, or by the SVAA pursuant to paragraph 7.1 of Annex S-2.

BM Unit’s Metered Consumption (Losses)

BMMCL_iaNLj

MWh

The line losses determined by a Half Hourly Data Aggregator as resulting from the BM Unit’s Metered Consumption pursuant to paragraph 3.6 of Annex S-2, or by the SVAA pursuant to paragraph 7.2 of Annex S-2.

BM Unit’s Profiled Consumption

BMPC_iLPRj

MWh

A Supplier BM Unit’s non half hourly Consumption profiled per Settlement Period for a particular Consumption Component Class, determined pursuant to paragraph 8.1 of Annex S-2.

BM Unit’s Profiled Disconnection

BMPD_iLPRj

MWh

A Supplier BM Unit’s non half hourly Demand Disconnection volume profiled per Settlement Period for a particular Consumption Component Class, determined pursuant to paragraph 8.2 of Annex S-2.

Calculation Period

The period of consecutive Settlement Days (typically but not necessarily one year in duration) on whose Supplier Purchase Matrix data the calculation of Average Fractions of Yearly Consumption pursuant to paragraph 5.1 of Annex S-2 is based.

Certificate of Supply

For the purposes of Annex S-2 the Estimated Annual Consumption for a Non Qualifying Unmetered Supply as provided from time to time by Public Distribution Service Operator.

Clock Interval

A combination of seasons, dates, days and times defining the period over which Consumption is recorded by a Settlement Register the details of which are provided pursuant to paragraph 5.1.1 of Annex S-2.

Consumption

MWh

The amount of electricity produced by a SVA Generator or used by an SVA Customer.

Consumption Component Class

A classification of half hourly Consumption and/or electricity produced or used by an Asset which comprises one element from each of the following categories as shown in Table X-8:

• metered or unmetered;

• consumption or SVA generation;

• SVA Metering System with or without Metering System specific line losses (but a SVA Metering System without Metering System specific line losses can only be combined with unmetered Consumption);

• Consumption without line losses or line losses;

• based on actual or estimated half hourly; or

• based on Annualised Advance or Estimated Annual Consumption.

Consumption Data

That part of the Supplier Purchase Matrix containing the values of Total Annualised Advance, Total Metered Estimated Annual Consumption and Total Unmetered Consumption.

Co-ordinated Universal Time

UTC

Number

Bears the same meaning as in the document Standard Frequency and Time Signal Emission, International Telecommunication Union - RTF.460(ISBN92-61-05311-4) (colloquially referred to as Rugby Time).

Corrected Component

CORC_iNj

MWh

The Consumption for a Supplier BM Unit's Consumption Component Class after the application of the GSP Group Correction Factor, determined pursuant paragraph 9.3 of Annex S-2.