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Successful start of the joint regional testing of the DE-AT-PL-4M MC (Interim Coupling) Project

The Nominated Electricity Market Operators (NEMOs) and Transmission System Operators (TSOs) from Austria, Germany, Poland and the 4M Market Coupling (4M MC) countries, namely the Czech Republic, Hungary, Romania and Slovakia, hereby inform stakeholders about the successful start of the joint regional testing phase of the project on 25th January 2021.


In this first phase of testing (Full Integration Testing – FIT) the project parties will run end-toend functional tests at regional level, performed with the objective to simulate the production environment, which should demonstrate the functionality between all systems involved in the
market coupling process. After the successful completion of the FIT phase, the project parties will test the operational procedures during the Simulation Integration Testing (SIT) phase. Such end-to-end procedural tests will also be executed at a wider European level, together with all parties of the Single Day-ahead Market Coupling (SDAC). Project parties are currently planning to organize Member Tests with the participation of market participants in the second half of April 2021. In order to provide market participants with detailed information about these tests, as well as about the expected changes in current processes, a joint workshop is expected to be organized by the project in due time before the foreseen Member Tests. Market participants will receive details about the planned workshop, as well as an information package about the expected changes in daily processes in the upcoming weeks.

The DE-AT-PL-4M MC Project, also referred to as Interim Coupling aims to connect the borders of 4M MC with the Multi-Regional Coupling (MRC) by introducing Net Transmission Capacity based (NTC-based) implicit capacity allocation on six borders (PL-DE, PL-CZ, PLSK, CZ-DE, CZ-AT, HU-AT). This will mark the start of the so called “enduring phase” of SDAC, during which there will be one European Single Day-Ahead Coupling only, where MRC and 4M MC are coupled.

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