Registration of Systems Connection Points
Registration of Systems Connection Points |
Guidance Note |
Registration of Systems Connection Points
What is a Systems Connections Point?
Grid Supply Points (GSPs) – these are points of connection between the Transmission System and a Distribution System of an LDSO. The LDSO is the Registrant of the Metering System for these sites
Offshore Transmission Connection Point (OTCP) – these are a GSP where the Systems Connection Point is between a Distribution System and an Offshore Transmission System. At an OTCP the National Electricity Transmission System Operator (NETSO) is the Registrant of the Metering System as opposed to the LDSO
Distribution Systems Connection Points (DSCPs) – these are points of connection between two Distribution Systems. The two LDSOs involved determine which will be the Registrant of the Metering System for these sites
BSCP25: Registration of Transmission System Boundary Points, Grid Supply Points, GSP Groups and Distribution Systems Connection Points
To register the Systems Connection Point in Settlements
Alternatively, this information can be completed via the Self-Service Gateway (Elexon Kinnect Customer Solution).
BSCP20: Registration of Metering systems for Central Volume Allocation
To register the Metering System and Meter Technical Details (MTDs) in Settlements
BSCP75: Registration of Meter Aggregation Rules for Volume Allocation Units
To register the Aggregation Rules for the Systems Connection Point and GSP Group in Settlements
Code of Practice 4 (CoP4): The Calibration, Testing and Commissioning Requirements of Metering Equipment for Settlement Purposes
Details the commissioning requirements for the Meters associated with the Systems Connection Point
Where the NETSO or the LDSO owns the measurement transformers then they are responsible for the commissioning of these and passing commissioning information to the MOA. Where measurement transformers are not owned by a BSC Party, the MOA is responsible for the commissioning of all the Metering Equipment.
BSCP02: Proving Test Requirements for Central Volume Allocation Metering systems
Details the requirements for a Proving Test for the Meters associated with the Systems Connection Point
BSCP128: Production, Submission, Audit and Approval of Line Loss Factors
Details the requirements around Line Loss Factors (LLFs) for DSCPs
BSCP32: Metering Dispensations
The Metering Equipment measuring energy flows at a Systems Connection Point should comply with the Code of Practice applicable for the size of that circuit. This BSCP sets out the process for applying for a Metering Dispensation should any aspect of the Metering Equipment, or the location of the measurement transformers, not meet the requirements in the applicable Code of Practice. If required, a Metering Dispensation should be sought as soon as possible as it may not be granted or may be granted on a time limited basis to allow for compliant Metering Equipment to be installed before an agreed date.
bm.unit@Elexon.co.uk for further advice on the registration of Systems Connection Points;
dispensations@Elexon.co.uk for further advice on Metering Dispensations and the submission of BSCP32 forms;
llfs@Elexon.co.uk for further advice on the submission of LLFs and the submission of BSCP128 forms.
NETA@imserv.com for the submission of BSCP20, BSCP25, BSCP75, BSCP02 forms
BMU.registration@nationalgrideso.com and transmissionconnections@nationalgrideso.com for agreeing GSP Ids with the NETSO
Flow Diagram – Registration of a new Grid Supply Point
LDSO Checklist – Registration of a new GSP
BSC / BSCP Reference | Requirement Topic | Requirement Task | Responsible Party(s) | When | √ |
BSCP25/4.3.1 | Agree new GSP ID | NETSO agrees new GSP Id with relevant LDSO(s) | NETSO and LDSO | At least 5 Working Days (WD) before the Commissioning Programme Commencement Date1 |
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BSCP32/3.1.2 | Is a Metering Dispensation required? | If it is identified that the Metering Equipment is not Code of Practice compliant or the measurement transformers are not located at the Defined Metering Point meaning that compensation needs to be applied to the Meters2 , submit BSCP32/4.1 to apply for a Metering Dispensation3 . If loss compensation is to be applied, the values need to be calculated and included in the Metering Dispensation application to be considered by the Electrical Loss Validation Agent prior to decision by the Imbalance Settlement Group. | LDSO | If required and to meet the timescales in the ‘BSCP32 Metering Dispensations Application Key Dates’ document |
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BSCP25/4.3.5 | Registration and allocation of GSP to GSP Group | Elexon to inform relevant LDSO(s) of registration and request initial views regarding which GSP Group the new GSP should be allocated to | Elexon | Within 1 WD of Elexon receiving the registration of new GSP form from the NETSO |
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BSCP25/4.3.6 | Allocation of GSP to GSP Group | Send Elexon initial views on the GSP allocation to a GSP Group | LDSO | Within 2 WD of notice from Elexon |
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BSCP25/4.3.7, 4.3.8 | Allocation of GSP to GSP Group | Elexon will issue a consultation on the allocation of the GSP to a GSP Group. Providing a response to this is optional | LDSO, All Parties | In consultation timescales (consultation is 10 WD) |
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BSCP25/4.3.10 | Allocation of GSP to GSP Group | Elexon will notify relevant LDSOs of the Panel’s decision on the allocation of the GSP to a GSP Group | Elexon | Within 1 WD of the Panel Meeting |
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BSCP25/4.3.14, BSCP20/3.1.3 | Register Metering System | Submit BSCP20/4.1 to register the Metering System and appoint the MOA4 | LDSO | At least 20 WD before the Effective From Date |
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BSCP20/3.1.9 | Submit Meter Technical Details | Submit BSCP20/4.3 to register the Meter Technical details.
This defines the Metering Sub-System IDs which are required for the Aggregation Rules | MOA or LDSO5 | At least 16 WD before the Effective From Date |
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BSCP25/4.3.13, BSCP75/3.1.1 | Submit GSP Aggregation Rules | Submit Aggregation Rules for the GSP on BSCP75/4.26 | LDSO | At least 20 WD before the Effective From Date |
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BSCP75/3.1.2 – 3.1.7 | Validate GSP Aggregation Rules | CDCA validates Aggregation Rules and may ask for supporting information. If rules are incorrect they are to be resubmitted and validated until correct. Elexon may also be involved in the validation process | CDCA, Elexon | Within 7 WD of receipt of Aggregation Rules |
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BSCP75/3.1.8 | Provide revised GSP Group Metered Volume Aggregation Rules | CDCA requests that the LDSO provides revised GSP Group Metered Volume7 Aggregation Rules.8 | CDCA | Once GSP Aggregation Rules are valid |
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BSCP25/4.3.13, BSCP75/3.1.9 | Provide revised GSP Group Metered Volume Aggregation Rules | Submit GSP Group Metered Volume Aggregation Rules on BSCP75/4.27 | LDSO | Following request |
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BSCP75/3.1.11 | Provide draft GSP Group Take Aggregation Rules | CDCA to send LDSO revised GSP Group Take9 Aggregation Rules | CDCA | Following receipt of GSP Group Metered Volume Aggregation Rules |
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BSCP75/3.1.12, 3.13 | Validate and Submit GSP Group Take Aggregation Rules | Validate and return signed GSP Group Take Aggregation Rules to CDCA. If there is a contracted (embedded) LDSO involved nominated (host) LDSO to confirm with contracted LDSO that these are correct. | LDSO | Following receipt of revised GSP Group Take Aggregation Rules |
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BSC Section L3.1.2 / CoP4 | Commission Metering Equipment | Commission, in accordance with CoP4 any parts of the Metering Equipment (e.g. measurement transformers) owned by the LDSO and report the findings to the MOA. | LDSO, MOA | As required |
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BSCP02/3.1.7 | Receive result of Proving Test | The CDCA will notify the LDSO of the results of the Proving Test | LDSO, CDCA | Within 1 WD of completing the Proving Test |
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BSC Section K1.4.3 / BSCP25/4.3.1810 | Approval to energise or Withhold energisation | When all parties have met their requirements, including the approval of a Metering Dispensation where appropriate, Elexon will issue an approval to energise If any requirements have not been met, Elexon will issue a withhold energisation notice | Elexon, LDSO, NETSO, CRA, CDCA | Date At least 4 WD before the Effective From Date |
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BSCP75/3.1.14, 3.1.15 | Receive Reports | LDSO receives reports of GSP Aggregation Rules and GSP Group Take Aggregation Rules entered into the system from CDCA | CDCA, LDSO | Prior to effective from date |
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Flow Diagram - Registration of a new circuit at a GSP
LDSO Checklist - Registration of a new circuit at a GSP
BSC / BSCP Reference | Requirement Topic | Requirement Task | Responsible Party(s) | When | √ |
BSCP32/3.1.2 | Is a Metering Dispensation required? | If it is identified that the Metering Equipment is not Code of Practice compliant or the measurement transformers are not located at the Defined Metering Point meaning that compensation needs to be applied to the Meters 2, submit BSCP32/4.1 to apply for a Metering Dispensation3. If loss compensation is to be applied, the values need to be calculated and included in the Metering Dispensation application to be considered by the Electrical Loss Validation Agent prior to decision by the Imbalance Settlement Group. | LDSO | If required and to meet the timescales in the ‘BSCP32 Metering Dispensations Application Key Dates’ document |
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BSCP25/4.5.4, BSCP20/3.1.3 | Register Metering System if required | Submit BSCP20/4.1, to register the Metering System and appoint the MOA if a new MSID is required for the new circuit4 | LDSO | At least 20 WD before the Effective From Date |
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BSCP25/4.5.4, | Update Meter Technical Details | Instruct MOA to update Meter Technical Details4 | LDSO, MOA | At least 20 WD before the Effective From Date |
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BSCP20/3.1.9 or BSCP20/3.5.1 | Submit Meter Technical Details | Submit BSCP20/4.3 to register the Meter Technical details. This defines the Metering Sub-System IDs which are required for the Aggregation Rules | MOA or LDSO5 | At least 16 WD before the Effective From Date (BSCP20/3.1.9 for a new Metering System) or at least 20 WD before the Effective From Date (BSCP20/3.5.1 for changes to Meter Technical Details) |
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BSCP25/4.5.3, BSCP75/3.1.1 | Submit GSP Aggregation Rules | Submit Aggregation Rules for the GSP on BSCP75/4.26 | LDSO | At least 20 WD before the Effective From Date |
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BSCP75/3.1.2 – 3.1.7 | Validate GSP Aggregation Rules | CDCA validates Aggregation Rules and may ask for supporting information. If rules are incorrect they are to be resubmitted and validated until correct. Elexon may also be involved in the validation process | CDCA, Elexon |
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BSC Section L3.1.2 / CoP4 | Commission Metering Equipment | Commission, in accordance with CoP4 any parts of the Metering Equipment (e.g. measurement transformers) owned by the LDSO and report the findings to the MOA. | LDSO, MOA | As required |
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BSCP02/3.1.7 | Receive result of Proving Test | The CDCA will notify the LDSO of the results of the Proving Test | LDSO, CDCA | Within 1 WD of completing the Proving Test |
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BSC Section K1.4.3 / BSCP25/4.3.1810 | Approval to energise or Withhold energisation | When all parties have met their requirements, including the approval of a Metering Dispensation where appropriate, Elexon will issue an approval to energise
If any requirements have not been met, Elexon will issue a withhold energisation notice | Elexon, LDSO, NETSO, CRA, CDCA | Date At least 4 WD before the Effective From Date |
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BSCP75/3.1.14, 3.1.15 | Receive Reports | LDSO receives reports of GSP aggregation rule entered into the system from CDCA | CDCA, LDSO | Prior to effective from date |
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Systems Connection Point Metering not at Defined Metering Point
Flow diagram – Registration of a new DSCP
LDSO Checklist – Registration of a new DSCP
BSC / BSCP Reference | Requirement Topic | Requirement Task | Responsible Party(s) | When | √ |
BSCP25/4.2.3, BSCP20/3.1.3 | Register Metering System | Submit BSCP20/4.1 to register the Metering System and appoint the MOA4 12 | LDSO who is the registrant of the Metering System | At Least 50 WD before Effective From Date |
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BSCP128/2.5.1 | Register Line Loss Factors (LLFs) | Calculate LLFs and submit Calculation Self-Assessment Document (BSCP128 Appendix 10) containing these to Elexon | LDSO who is the Registrant of the Metering System13 | At Least 50 WD before Effective From Date |
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BSCP32/3.1.2 | Is a Metering Dispensation required? | If it is identified that the Metering Equipment is not Code of Practice compliant or the measurement transformers are not located at the Defined Metering Point meaning that compensation needs to be applied to the Meters, submit BSCP32/4.1 to apply for a Metering Dispensation3 If loss compensation is to be applied, the values need to be calculated and included in the Metering Dispensation application to be considered by the Electrical Loss Validation Agent prior to decision by the Imbalance Settlement Group. | LDSO who is the Registrant of the Metering System | If required and to meet the timescales in the ‘BSCP32 Metering Dispensations Application Key Dates’ document |
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BSCP128/2.3.18 | Register (LLFs) | Elexon will provide a report of the audit of LLFs and notify the LDSO whether their LLFs were approved by the Panel and of any non-compliances to be addressed | Elexon, LDSO who is the Registrant of the Metering System | Report within 10 WD of submission of LLFs. Notification of Panel approval within 2 WD of Panel meeting considering LLFs |
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BSCP25/4.2.1 | Register DSCP | Submit BSCP25/5.214 form to register the DSCP to the CRA | LDSO who is the Registrant of the Metering System | At least 20 WD prior to the Energisation Date of the first circuit of the DSCP |
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BSCP20/3.1.9 | Submit Meter Technical Details | Submit BSCP20/4.3 to register the Meter Technical details. This defines the Metering Sub-System IDs which are required for the Aggregation Rules | MOA or LDSO who is the Registrant of the Metering System5 | At least 16 WD before the Effective From Date |
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BSCP25/4.2.4, BSCP75/3.1.1 | Submit DSCP Aggregation Rules | Submit Aggregation Rules for the DSCP on BSCP75/4.26 | LDSO who is the Registrant of the Metering System | At least 20 WD before the Effective From Date |
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BSCP75/3.1.2 – 3.1.7 | Validate DSCP Aggregation Rules | CDCA validates Aggregation Rules and may ask for supporting information. If rules are incorrect they are to be resubmitted and validated until correct. Elexon may also be involved in the validation process | CDCA, Elexon | Within 7 WD of receipt of Aggregation Rules |
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BSCP75/3.1.8 | Provide revised GSP Group Metered Volume Aggregation Rules | CDCA requests that the LDSOs provide revised GSP Group Metered Volume7 Aggregation Rules8 | CDCA | Once DSCP Aggregation Rules are valid |
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BSCP25/4.2.4, BSCP75/3.1.9 | Provide revised GSP Group Metered Volume Aggregation Rules | Submit GSP Group Metered Volume Aggregation Rules on BSCP75/4.27 for BOTH affected GSP Groups | The host LDSOs responsible for submitting the GSP Group Metered Volume Allocation Rules for each GSP Group connected to the DSCP | Following request |
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BSCP75/3.1.11 | Provide draft GSP Group Take Aggregation Rules | CDCA to send BOTH LDSOs revised GSP Group Take9 Aggregation Rules | CDCA | Following receipt of GSP Group Metered Volume Aggregation Rules |
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BSCP75/3.1.12, 3.13 | Validate and Submit GSP Group Take Aggregation Rules | Validate and return signed GSP Group Take Aggregation Rules to CDCA. If there is a contracted (embedded) LDSO involved nominated (host) LDSO to confirm with contracted LDSO that these are correct. | Both LDSOs | Following receipt of revised GSP Group Take Aggregation Rules |
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BSC Section L3.1.2 / CoP4 | Commission Metering Equipment | Commission, in accordance with CoP4 any parts of the Metering Equipment (e.g. measurement transformers) owned by the LDSO and report the findings to the MOA. | LDSO, MOA | As required |
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BSCP02/3.1.7 | Receive result of Proving Test | The CDCA will notify the LDSO of the results of the Proving Test | LDSO who is the Registrant of the Metering System, CDCA | Within 1 WD of completing the Proving Test |
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BSC Section K1.4.3 / BSCP25/4.2.10, 4.2.1110 | Approval to energise or Withhold energisation | When all parties have met their requirements, including the approval of a Metering Dispensation where appropriate, ELEXON will issue an approval to energise If any requirements have not been met, ELEXON will issue a withhold energisation notice | ELEXON, both LDSOs, CRA, CDCA | Date At least 4 WD before the Effective From Date |
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BSCP75/3.1.14, 3.1.15 | Receive Reports | LDSOs receive reports of DSCP Aggregation Rule and GSP Group Take Aggregation Rule entered into the system from CDCA | CDCA, LDSO who is the Registrant of the Metering System | Prior to effective from date |
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Flow Diagram – Registration of a new circuit at a DSCP
LDSO Checklist – Registration of a new circuit at a DSCP
BSC / BSCP Reference | Requirement Topic | Requirement Task | Responsible Party(s) | When | √ |
BSCP25/4.5.4, BSCP20/3.1.3 | Register Metering System | Submit BSCP20/4.1 to register the Metering System and appoint the MOA4 15 if a new MSID is required for the new circuit. | LDSO who is the Registrant of the Metering System | At Least 50 WD before Effective From Date |
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BSCP128/2.5.1 | Register Line Loss Factors (LLFs) | Calculate LLFs and submit Calculation Self-Assessment Document (BSCP128 Appendix 10) containing these to Elexon if new LLFs are required due to the new circuit | LDSO who is the Registrant of the Metering System16 | At Least 50 WD before Effective From Date if new site; or At Least 40 WD before Effective From Date if submission of revised LLFs for an existing site owing to the new circuit |
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BSCP32/3.1.2 | Is a Metering Dispensation required? | If it is identified that the Metering Equipment is not Code of Practice compliant or the measurement transformers are not located at the Defined Metering Point meaning that compensation needs to be applied to the Meters, submit BSCP32/4.1 to apply for a Metering Dispensation3 If loss compensation is to be applied, the values need to be calculated and included in the Metering Dispensation application to be considered by the Electrical Loss Validation Agent prior to decision by the Imbalance Settlement Group. | LDSO who is the Registrant of the Metering System | If required and to meet the timescales in the ‘BSCP32 Metering Dispensations Application Key Dates’ document |
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BSCP128/2.3.18 | Register LLFs | Elexon will provide a report of the audit of LLFs and notify the LDSO whether their LLFs were approved by the Panel and of any non-compliances to be addressed | Elexon, LDSO who is the Registrant of the Metering System | Report within 10 WD of submission of LLFs. Notification of Panel approval within 2 WD of Panel meeting considering LLFs |
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BSCP25/4.5.1 | Register DSCP | Submit BSCP25/5.2 form to register the new circuit at DSCP to the CRA | LDSO who is the Registrant of the Metering System | At least 20 WD prior to the Circuit Energisation Date |
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BSCP25/4.5.4, BSCP20/3.1.3 | Update Meter Technical Details | Instruct MOA to update Meter Technical Details4 | LDSO, MOA | At least 20 WD before the Effective From Date |
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BSCP20/3.1.9 or BSCP20/3.5.1 | Submit Meter Technical Details | Submit BSCP20/4.3 to register the Meter Technical details. This defines the Metering Sub-System IDs which are required for the Aggregation Rules | MOA or LDSO who is the Registrant of the Metering System5 | At least 16 WD before the Effective From Date (BSCP20/3.1.9 for a new Metering System) or at least 20 WD before the Effective From Date (BSCP20/3.5.1 for changes to Meter Technical Details) |
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BSCP25/4.5.3, BSCP75/3.1.1 | Submit DSCP Aggregation Rules | Submit Aggregation Rules for the DSCP on BSCP75/4.26 | LDSO who is the Registrant of the Metering System | At least 20 WD before the Effective From Date |
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BSCP75/3.1.2 – 3.1.7 | Validate DSCP Aggregation Rules | CDCA validates Aggregation Rules and may ask for supporting information. If rules are incorrect they are to be resubmitted and validated until correct. Elexon may also be involved in the validation process | CDCA, Elexon | Within 7 WD of receipt of Aggregation Rules |
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BSC Section L3.1.2 / CoP4 | Commission Metering Equipment | Commission, in accordance with CoP4 any parts of the Metering Equipment (e.g. measurement transformers) owned by the LDSO and report the findings to the MOA. | LDSO, MOA | As required |
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BSCP02/3.1.7 | Receive result of Proving Test | The CDCA will notify the LDSO of the results of the Proving Test | LDSO who is the Registrant of the Metering System, CDCA | Within 1 WD of completing the Proving Test |
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BSC Section K1.4.3 / BSCP25/4.5.9, 4.5.1010 | Approval to energise or Withhold energisation | When all parties have met their requirements, including the approval of a Metering Dispensation where appropriate, Elexon will issue an approval to energise
If any requirements have not been met, Elexon will issue a withhold energisation notice | Elexon, both LDSOs, CRA, CDCA | Date At least 4 WD before the Effective From Date |
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BSCP75/3.1.14, 3.1.15 | Receive Reports | LDSO receives reports of DSCP aggregation rule aggregation rule entered into the system from CDCA | CDCA, LDSO who is the Registrant of the Metering System | Prior to effective from date |
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Changes to Metering Equipment at Systems Connection Points
Need more information?
BSCP02: Proving Test Requirements for Central Volume Allocation Metering systems
BSCP20: Registration of Metering systems for Central Volume Allocation
BSCP25: Registration of Transmission System Boundary Points, Grid Supply Points, GSP Groups and Distribution Systems Connection Points
BSCP32: Metering Dispensations
BSCP75: Registration of Meter Aggregation Rules for Volume Allocation Units
BSCP128: Production, Submission, Audit and Approval of Line Loss Factors
Code of Practice 4 (CoP4): The Calibration, Testing and Commissioning Requirements of Metering Equipment for Settlement Purposes
bm.unit@Elexon.co.uk for further advice on the registration of Systems Connection Points;
dispensations@Elexon.co.uk for further advice on Metering Dispensations and the submission of BSCP32 forms;
llfs@Elexon.co.uk for further advice on the submission of LLFs and the submission of BSCP128 forms.
NETA@imserv.com for the submission of BSCP20, BSCP25, BSCP75, BSCP02 forms
BMU.registration@nationalgrideso.com and transmissionconnections@nationalgrideso.com for agreeing GSP Ids with the NETSO
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1 Commissioning Programme Commencement Date (CPCD) as defined in the Connection and Use of System Code (CUSC) in relation to a particular User in the Construction Agreement
2 The Systems Connection Point Metering Equipment should be as defined in Code of Practice. For economic reasons, at Shared GSPs (where there are two or more Distribution Systems connecting to the Transmission System at the same busbar, see below) the Metering Equipment may still be on the Supergrid Transformers - such arrangement may require a Metering Dispensation.
3 The Metering Dispensation form requires an MSID. If this is not known at this stage, TBC can be included on the form and updated when known. Or an MSID can be reserved by contacting the CRA and registered at a later stage.
4 This form appoints the MOA, however the MOA may object to the appointment if they don’t believe that they are the MOA for the Metering System
5 Normally this step is completed by the MOA
6 Guidance on writing Aggregation Rules can be found in the Aggregation Rules’ Guidance
7 GSP Group Metered Volume is the algebraic sum of: the Active Energy flowing into Grid Supply Points connected to the GSP Group and at DSCPs connected to that GSP Group, and the quantity of Active Energy flowing out of a GSP Group at Grid Supply Points connected to the GSP Group and at DSCPs connected to the GSP Group only.
8 Note that these steps are often not completed as the CDCA writes the GSP Group Take Aggregation Rules from its own knowledge of the GSP Group
9 GSP Group Take (GSPGT) is determined as GSPGT = GSP Group Metered Volume + I – E
where: I means the magnitude of the quantities of Imports at CVA Boundary Points in that GSP Group (as at the Transmission Boundary) and, E means the magnitude of the quantities of Exports at CVA Boundary Points in that GSP Group (as at the Transmission Boundary).
10Section K1.4.3 requires Elexon to issue the approval to energise notice when all registration requirements are complete. BSCP25 requires the CRA to inform the NETSO and the LDSO not to energise the circuits if the registration is not complete. In practise Elexon issues withhold energisation instructions.
11 A Shared GSP is defined in BSCP25 as a Systems Connection Point at which the Transmission System is connected to two or more Distribution Systems
12 BSCP75 convention for a DSCP is export is from the Registrant’s GSP Group and import is to the Registrant’s GSP Group
13 If necessary, both LDSOs will need to discuss and agree the Line Loss Factor Value but this must be submitted by the LDSO who is Registrant of the Metering System.
14 Alternatively, this information can be completed via the Self-Service Gateway (Elexon Kinnect Customer Solution).
15 BSCP75 convention for a DSCP is export is from the Registrant’s GSP Group and import is to the Registrant’s GSP Group
16 If necessary, both LDSOs will need to discuss and agree the Line Loss Factor Value but this must be submitted by the LDSO who is Registrant of the Metering System.
17 In cases where the measurement transformers were installed by the LDSO on or after 6 November 2014, the MOA will request the Commissioning record from the LDSO if they need to re-commission Metering Equipment following material change. Where the measurement transformers were installed before 6 November 2014 the MOA at the time of the original install should hold the measurement transformers commissioning records.