Ulla-Førre


Ulla-Førre is a hydropower complex in Suldal, Hjelmeland and Bykle in Norway. It has an installed capacity of approximately 2,100 MW, and the annual average production is , while its reservoir capacity is about ; at full production, it can last 7—8 months. The complex includes the artificial lake Blåsjø, which is made by dams around above the sea level. The hydroelectric power stations in the complex are Saurdal, Kvilldal, Hylen and Stølsdal, operated by Statkraft.

Blåsjø

Blåsjø is the tenth largest lake in Norway by area. It is located in the municipality of Bykle in Aust-Agder county and the municipalities of Hjelmeland and Suldal in Rogaland county. The lake is about west of the village of Bykle. It has a surface area of. Its surface swings between above sea level depending on seasonal weather and power consumption, and it has a shoreline of about. At the highest regulated water level, Blåsjø contains 3105 million cubic meters of water.

Kvilldal Hydroelectric Power Station

The Kvilldal Power Station is a located in the municipality of Suldal. The facility operates at an installed capacity of 1,240 MW, making it the largest power station in Norway in terms of capacity. Statnett plans to upgrade the western grid from 300 to 420 kV at a cost of 8 billion NOK, partly to accommodate the NSN Link cable from Kvilldal to England.

Saurdal Hydroelectric Power Station

The Saurdal Power Station is a hydroelectric and pumped-storage power station located in the municipality of Suldal. The facility operates at an installed capacity of 674 MW. The average energy absorbed by pumps per year is . The average annual production is .

Hylen Hydroelectric Power Station

The Hylen Power Station is located at the bottom of Hylsfjord in Suldal. It operates at an installed capacity of 160 MW, with an average annual production of. The plant exploits water through a tunnel from the lake Suldalsvatnet.