Communication note

11 May 2022: The Market Coupling Steering Committee (MCSC) initiated an in-depth investigation of the partial decoupling on the 10 of May

During the market coupling process on 10 May a technical issue was experienced that led to a partial decoupling.

  • Country/Bidding zone decoupled from a market point of view from SDAC: Slovakia
  • Order book decoupled from the SDAC process: OKTE

The following interconnectors were decoupled from SDAC: CZ-SK, SK-HU, DE_50Hz-PL/CZ, PL-DE_50Hz/CZ/SK, CZ-DE_50Hz, CZ-PL, SK-PL, DE_50Hz-PL

The incident was caused by a technical issue at OKTE. The party reported that the issue occurred in their local trading system. The issue could not be resolved within the time allocated by the SDAC procedures and partial decoupling was declared. The final market coupling results for the remaining coupled parties were published at 13:41 CET and they were confirmed at 13:52 CET. The common coupling system worked as expected and ensured the coupling of the remaining part of SDAC.

The MCSC has initiated an in-depth investigation. A decoupling report summarising the outcome of the investigation and potential lessons learned is expected to be published before long.



OPCOM is the Romanian Electricity and Gas Market Operator. Since 2000, OPCOM has been committed to strengthen a marketplace where energy and environmental certificates are traded in conditions of transparency and integrity. Today, the trading portfolio offered by OPCOM ranges from electricity products to gas products, as well as green certificates. More than 900 companies are using the products available for trading on short-term electricity, gas and green certificates markets as well as on term markets for electricity, gas and green certificates bilateral contracts. In addition to this role, OPCOM is responsible for settlement of the transactions concluded on short-term energy markets, Balancing Market as well as the Imbalances of the Balancing Responsible Parties. OPCOM also manages the Green Certificates Register. Today, OPCOM is acting as Registered Reporting Mechanism under REMIT managing more than 480 reporting agreements on its electricity and gas markets. OPCOM was designated by the Romanian Energy Regulatory Authority as Nominated Electricity Market Operator (NEMO) in accordance with the Regulation (EU) 2015/1222 for fulfilling tasks related to the coupling of the day-ahead and intraday markets.

OPCOM applies the Quality Management System complying with ISO 9001 - SR EN ISO 9001, respectively the Information Security Management System complying with ISO/IEC 27001 - SR EN ISO/IEC 27001, both systems being certified by Lloyd's Register LRQA.

For more information about OPCOM, please visit us at www.opcom.ro

Communication note 11.5.2022