P350 Draft reference Network Mapping Statement consultation 2022-23

This consultation seeks views on the draft reference Network Mapping Statement  for use in the allocation of Transmission Loss Factors (TLFs) for BSC Year 2022-2023. 


Who will this impact?

Trading parties are invited to express their views on this draft reference Network Mapping Statement, in particular whether they agree with the following:

  • Volume Allocation Unit (VAU) to Node Mapping
  • Node to Zone Mapping
  • BM Unit to Zone Mapping
  • That the draft reference network mapping statement achieves the requirements detailed in the P350 legal text (paragraph 4.3 of Annex T-2)

About the Network Mapping Statement

The NMS uses historic data from a ‘Reference Year’ (RY), running from 1 September to 31 August each year, for use in the following BSC Year.

This NMS contains data relating to the RY 2020-21 for use in the BSC Year 2022-23.

The VAU to Node mappings are used to convert Metered Volume data for Volume Allocation Units into power flows by Node. These power flows by Node, along with associated Network Data provided by the NETSO, and the Distribution System Operator, are used to derive Nodal Transmission Loss Factors (TLFs) through use of the Load Flow Model (LFM), as defined in the LFM Specification.

Once the Load Flow Model has been run, Node to Zone mappings are used to derive Zonal TLFs from Nodal TLFs and Zone to Balancing Mechanism (BM) Unit mappings are used to allocate a TLF to every BM Unit (section 6).

How to respond

Please download and complete the consultation response form and email it to [email protected] by 17:00 on Tuesday 14 September 2021. Please us the Subject of ‘Draft Reference Network Mapping Statement’ in your email.

Any responses received after the deadline may not receive due consideration.

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