The Sima Power Station is a hydroelectric power station located in Eidfjord Municipality in Vestland, Norway. It stands at the mouth of the Sima River. The facility Lang-Sima operates at an installed capacity of 500 megawatts (670,000 hp), and has an average annual production of 1,212 gigawatt-hours (4,360 TJ). The facility Sy-Sima has an installed capacity of 620 megawatts (830,000 hp), and an average annual production of 1,640 gigawatt-hours (5,900 TJ). Operator is Statkraft.