Harsprånget hydroelectric power station explained

Harsprånget
Location Map:Sweden
Coordinates:66.9542°N 19.8147°W
Country:Sweden
Location:South of Porjus
Status:Operational
Construction Began:1918 Cancelled 1921
Restarted 1945
Opening:1951
Owner:Vattenfall
Dam Type:Rock-fill dam
Dam Length:1400m (4,600feet)
Dam Height:500NaN0
Dam Volume:6000000m2
Dam Crosses:Lule River
Res Name:Harsprånget Reservoir
Plant Type:C
Plant Turbines:3*110 MW, 1*180 MW, 1*465 MW, All of Francis-type
Plant Hydraulic Head:107 M
Plant Capacity:977 MW
Plant Annual Gen:2,1 TWh (2009)

Harsprånget is a hydroelectric power station located on the Lule River in northern Sweden, just downstream of Porjus.

With a power of 977 MW,[1] it is the largest hydroelectric power station in Sweden, and also the fourth largest in the Nordic countries. The name means "Hare Run" in Swedish. This was also the name of the mighty rapids there, and the name was related to the sharp turns in the rapids, a little similar to the ones a hare does when fleeing. Normal year production is around 2131 GWh. Total fall height is around 107 m.

History

Construction of the station started in 1918. However, recession after World War I cancelled the construction, which was not started again before 1945. It was opened in 1951, then with a power of 330 MW. In 1980, two new turbines were installed which increased the max power to 945 MW. The rated power was later increased further.

Turbines

The turbines are of Francis type with vertical axis and steel spirals.
Units 12345
Capacity 110 MW 110 MW 110 MW 180 MW 475 MW
Maximum water flow 127 m³/s 127 m³/s 127 m³/s 175 m³/s 485 m³/s
Revolutions/min 166,7 r/min 166,7 r/min 166,7 r/min 166,7 r/min 107,1 r/min
Cog diameter 3,6 m 3,6 m 3,6 m 4,2 m 6,6 m
Supplier NOHAB NOHAB NOHAB

Grand total of 977 MW.

Notes and References

  1. Web site: Harsprånget. Vattenfall. https://web.archive.org/web/20141023162450/http://powerplants.vattenfall.com:80/node/332. 23 October 2014. 13 June 2023.