Inverter setting mismatch triggers 1GW HVDC outage between Estonia and Finland

In January 2026, a technical incident occurred in Estonia during testing of the new 100MW Hertz 1 (Kiisa) battery energy storage system (BESS). The event triggered protective relays, resulting in the emergency shutdown of over 1GW of HVDC capacity, specifically the EstLink 1 and EstLink 2 interconnectors. The root cause was an incorrect parameter configuration//SCADAS.ECRead More