The Day-ahead Joint Steering Committee (JSC) initiated an in-depth investigation of the partial decoupling on the 13th of January
 15.01.2021 11:42
News

During the market coupling process on 13th January a technical issue was experienced that led to a partial decoupling of Italy, and consequently Greece, Slovenia, and Croatia from SDAC (Multi Regional Coupling [MRC]). Whereas Slovenia remained coupled with Italy, the Croatian and Greek day-ahead market prices were calculated in isolation. The following interconnectors were decoupled from SDAC: IT-AT, IT-FR, IT-GR, AT-SI, SI-HR.

The incident was caused by an unforeseeable technical issue at GME and was not caused by the common market coupling algorithm. The issue could not be fixed within the time allocated by the MRC procedures and at 12:45 CET the partial decoupling of the order books of GME, EXAA, BSP, CROPEX, and HEnEx was declared and shadow auctions were triggered for the impacted interconnectors. The final market coupling results for the remaining coupled parties were published at 13:54 CET. The common coupling system worked as expected and ensured the coupling of the remaining part of MRC.

The JSC has initiated an in-depth investigation. A decoupling report summarising the outcome of the investigation and potential lessons learned is expected to be published within a month time.



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