The on-going integration of the European electricity system leads to a growing need for cooperation and harmonisation of the system balancing policies across Europe. The need for harmonisation has been recognized by Agency for the Cooperation of Energy Regulators (ACER) and led to the “Framework Guidelines on Electricity Balancing”, published in September 2012.
The objective of the System Balancing Management Comparison project is to discuss and better understand the merits of the different system balancing schemes applied by the leading Transmission System Operators (TSOs) in Europe. The comparison project shall improve the insight in the differences between the system balancing practices of the TSOs.
Phase 1 of the project has been undertaking in 2013. It helped to identify a number of indicators, which were easily available at the TSOs. It also included qualitative description of the various balancing regimes. The main achievement of phase 1 was to make the most important indicators of system balancing, such as the imbalance volumes, the contracted reserved capacity, the available reserve margins and the resulting Area Control Error, comparable.
Phase 2, helped to analyse a limited number of selected issues in greater detail in order to improve the understanding of any differences. It also helped to identify “best practice”. The project contributed to the prioritization of the issues that may provide the most useful input into the TSOs harmonisation work.
The outcome of phase 2 provided a contribution to the TSOs to identify the merits and shortcomings in both the institutional system balancing framework as well as the different system balancing practices. Participating TSOs in phase 2 are Elia System Operators NV, Energinet.dk, NationalGrid, TenneT TSO GmbH and TenneT B.V.
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