By ESS news
An outage in Estonia’s electricity system on January 20 caused both EstLink interconnections between Estonia and Finland to go offline, cutting around 1,000 MW of capacity, equivalent to around 20% of the Baltic region’s winter electricity needs.
The shortfall was initially covered by support from the continental European electricity grid, as the 500 MW AC link between Poland and Lithuania operated at double its rated capacity to compensate. Later, reserve capacity was deployed within the Baltic states.
The oscillations were caused by a 100 MW/200 MWh battery energy storage system in Kiisa, just south of Tallinn, one of the largest battery storage systems in the Baltics. The incident occurred during the final tests of the grid connection, causing the DC cables to trip.
The €100 million facility, developed by Estonian company Evecon in collaboration with French companies Corsica Sole and Mirova, features 54 battery containers supplied by Nidec Conversion.
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