Ulla-Førre

Ulla-Førre
The artificial lake Blåsjø and Storvassdammen
Interactive map of Ulla-Førre
CountryNorway
StatusOperational
OwnerStatkraft
Reservoir
CreatesBlåsjø
Total capacity3.1 km3 (0.74 cu mi)
Active capacity7.8 TWh (28 PJ)[1]
Surface area84.48 km2 (32.62 sq mi)
Normal elevation930–1,055 metres
(3,051–3,461 feet)
List of power stations:
Kvilldal Hydroelectric Power Station
Installed capacity1,240 MW (1,660,000 hp)
Annual generation3,517 GWh (12,660 TJ)
Saurdal Hydroelectric Power Station
Installed capacity640 MW (860,000 hp)
Annual generation1,335 GWh (4,810 TJ)
Hylen Hydroelectric Power Station
Installed capacity160 MW (210,000 hp)
Annual generation583 GWh (2,100 TJ)
Stølsdal Hydroelectric Power Station
Installed capacity17 MW (23,000 hp)
Annual generation51 GWh (180 TJ)

Ulla-Førre is a hydropower complex in Southern Norway. It is situated along the borders of Suldal Municipality and Hjelmeland Municipality (in Rogaland county) and Bykle Municipality (in Agder county), Norway. It has an installed capacity of approximately 2,100 megawatts (2,800,000 hp), and the annual average production is 4.45 terawatt-hours (16.0 PJ) (1987–2006), while its reservoir capacity is about 7.8 TWh (28 PJ); at full production, it can last seven to eight months.[1] The complex includes the artificial lake Blåsjø, which is made by dams around 1,000 metres (3,300 ft) above the sea level. The hydroelectric power stations in the complex are Saurdal, Kvilldal, Hylen and Stølsdal, operated by Statkraft.[2]

Blåsjø

Blåsjø is the tenth largest lake in Norway by area. It is located on the border of Bykle Municipality in Agder county and Hjelmeland Municipality and Suldal Municipality in Rogaland county. The lake is about 20 kilometres (12 mi) west of the village of Bykle. It has a surface area of 84.48 square kilometres (32.62 sq mi). Its surface swings between 930 and 1,055 metres (3,051 and 3,461 ft) above sea level depending on seasonal weather and power consumption, and it has a shoreline of about 200 kilometres (120 mi).[3] At the highest regulated water level, Blåsjø contains 3,105,000,000 cubic metres (4.061×109 yd3) of water.

Kvilldal Hydroelectric Power Station

The Kvilldal Power Station is a located in Suldal Municipality. The facility operates at an installed capacity of 1,240 megawatts (1,660,000 hp), making it the largest power station in Norway in terms of capacity.[4] Statnett plans to upgrade the western grid from 300 kV to 420 kV at a cost of 8 billion kr,[5][6] partly to accommodate the North Sea Link cable[7] from Kvilldal to Blyth, UK.[8]

Saurdal Hydroelectric Power Station

The Saurdal Power Station is a hydroelectric and pumped-storage power station located in Suldal Municipality. The facility operates at an installed capacity of 674 megawatts (904,000 hp) (in 2015). The average energy absorbed by pumps per year is 1,189 GWh (4,280 TJ) (in 2009 to 2012). The average annual production is 1,335 GWh (4,810 TJ) (up to 2012).[9]

Hylen Hydroelectric Power Station

The Hylen Power Station is located at the bottom of Hylsfjorden in Suldal Municipality. It operates at an installed capacity of 160 megawatts (210,000 hp), with an average annual production of 583 GWh (2,100 TJ). The plant exploits water through a tunnel from the lake Suldalsvatnet.[10]

References

  1. ^ a b "Om kraftmarkedet og det norske kraftsystemet – NVE". nve.no (in Norwegian). 31 October 2019. Archived from the original on 13 February 2020. Blåsjø er med en kapasitet på 7,8 TWh Norges største magasin. Det rommer tre års normaltilsig, men kan med full produksjon tømmes i løpet av om lag 7–8 måneder.
  2. ^ Pleym, Arne G.; Tøndevold, Erik; Ystanes, Karl (2007). Ulla-Førre 1982–2007. Statkraft Energi AS – Region Vest-Norge.
  3. ^ Rosvold, Knut A., ed. (26 November 2024). "Blåsjø". Store norske leksikon (in Norwegian). Foreningen Store norske leksikon. Retrieved 16 March 2026.
  4. ^ Rosvold, Knut A., ed. (26 November 2024). "Kvilldal kraftverk". Store norske leksikon (in Norwegian). Foreningen Store norske leksikon. Retrieved 16 March 2026.
  5. ^ "Western corridor". Statnett. Archived from the original on 11 March 2016. Retrieved 24 February 2016.
  6. ^ "Vestre korridor" (in Norwegian). Statnett. 15 September 2023. Archived from the original on 11 March 2016. Retrieved 24 February 2016.
  7. ^ "Oppstart av arbeid på Vestre korridor". 15 September 2023. Archived from the original on 11 March 2016. Retrieved 24 February 2016.
  8. ^ "Cable to the UK". Statnett. Archived from the original on 30 October 2014. Retrieved 24 February 2016.
  9. ^ Rosvold, Knut A., ed. (26 November 2024). "Saurdal kraftverk". Store norske leksikon (in Norwegian). Foreningen Store norske leksikon. Retrieved 16 March 2026.
  10. ^ Rosvold, Knut A., ed. (26 November 2024). "Hylen kraftverk". Store norske leksikon (in Norwegian). Foreningen Store norske leksikon. Retrieved 16 March 2026.

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