Planned National Grid ESO Balancing Mechanism Outage

What is happening?

We have been notified by National Grid Electricity System Operator (NG ESO) that there will be a Balancing Mechanism (BM) planned maintenance outage between 10:10 (BST) and 14:40 (BST) on Thursday 24 October 2019. The BM outage will impact most of the data published on the Balancing Mechanism Reporting Service (BMRS). Updates for the outage status will be posted on the BRMS System Warning, before and after the planned outage.

How will I be affected?

National Grid ESO has advised us that the planned outage will affect the following communications:

  • Electronic Data Transfer (EDT)
  • Electronic Data Logging (EDL)
  • Balancing Services Adjustment Data (BSAD)
  • Market Operation Data Interface System (MODIS)

They have asked Parties to note that from the start of the planned outage, both Trading and Control Points should not use Electronic Data Transfer (EDT) or Electronic Data Logging (EDL), as this will result in re-declarations being rejected with a R999 error message.

Similarly, when the systems are returning, re-declarations should not be submitted (although the EDL link may appear available) until a notification is issued confirming the end of the planned outage. During the planned outage, balancing actions will be carried out by verbal instructions to the control points.

As the MODIS system relies on BM information, the De-Rated Margin (DRM) and Loss of Load Probability (LoLP) files will not be sent and the remaining files will be queued until after the outage.

The flow of BSAD (both DISBSAD and NETBSAD), to BSC Central Services will also be disrupted during this period and though the half-hourly indicative Settlement calculations will continue, they will use default data. The BMRS will not re-run indicative Settlement calculations on any impacted Settlement periods following the completion of this planned outage.

Furthermore, the Balancing Mechanism Reporting Service (BMRS) data normally received from National Grid ESO will not be updated via:

  • the BMRS website
  • APIs
  • Data Push Service

This includes REMIT and European Transparency Regulation (ETR) data sent from National Grid’s MODIS system and as a result, there will be a delay for BMRS in sending ETR to ENTSO-e Transparency Platform from BMRS.

Only Parties who currently submit their REMIT data via Elexon Portal will not be impacted by this outage and the data will continue to be published on BMRS as normal.

What do I need to do?

You do not need to take any specific action but just note the impact to parties during this planned outage.

Do I need to take any further action?




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