Market Domain Data (MDD) expansion
MDD is the central repository of reference data used by Suppliers, Supplier Agents and Local Distribution System Operators (LDSOs) in the retail electricity market. It is essential to the operation of Supplier Volume Allocation Trading Arrangements. Parties such as Suppliers use MDD to register Meter Point Administration Numbers (MPANs), which are unique identification numbers for meters in the retail market. Line Loss Factor Classes (LLFCs) are associated with MDD. LLFCs are multipliers for scaling the amount of electricity that is consumed or generated, to account for losses from electricity distribution networks. Over the past year we have been overseeing a major expansion to MDD resulting from Ofgem’s Targeted Charging Review. The TCR involves major changes to how network charges are set, with the distribution charge aspects being introduced from April 2022. As a result of this, the numbers of LLFCs in MDD more than doubled from 16,000 to approximately 34,000. The number of valid set combinations increased to approximately 408,000, compared with an original estimate of around 420,000. The reduced number results from Elexon working proactively with Parties to achieve a lower number of combinations.
23
Elexon
The enlarged MDD data set with Distribution Network Operator combinations became effective as planned from 1 April 2021. In December 2021, we completed the addition of the Independent Distribution Network Operator MDD combinations following successful Industry and System testing. This has ensured that these combinations are ready to use before Ofgem’s April 2022 deadline.
The benefits of Industry Standing Data
As part of the Helix Progamme the current plan is for MDD and LLF data to become ‘Industry Standing Data’. This means that the process for updating MDD and LLFs will be automated, through the Customer Solution. This will save time and resource for Elexon and the industry, reducing manual effort and the potential for errors. Our customers will also benefit from additional control over their data. We expect to have a minimum viable product available to demonstrate this in 2022.
