Vargfors Hydroelectric Power Station | |
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Official name | Vargfors kraftstation |
Location | Västerbotten County, Sweden |
Coordinates | 65°01′18″N19°41′09″E / 65.021708°N 19.685783°E Coordinates: 65°01′18″N19°41′09″E / 65.021708°N 19.685783°E |
Purpose | Power |
Status | Operational |
Opening date | 1961 |
Owner(s) | Vattenfall |
Operator(s) | Vattenfall |
Dam and spillways | |
Type of dam | Concrete arch dam |
Impounds | Skellefte River |
Commission date | 1961 |
Hydraulic head | 49 m |
Turbines | 1 Francis- and 1 Kaplan turbine |
Installed capacity | 122 MW |
Annual generation | 452 GWh |
Vargfors Hydroelectric Power Station (Swedish: Vargfors kraftstation) is a run-of-the-river hydroelectric power plant on the Skellefte River in Västerbotten County, Sweden. About 15 km southwest of Vargfors is the urban area Norsjö.
Run-of-river hydroelectricity (ROR) or run-of-the-river hydroelectricity is a type of hydroelectric generation plant whereby little or no water storage is provided. Run-of-the-river power plants may have no water storage at all or a limited amount of storage, in which case the storage reservoir is referred to as pondage. A plant without pondage is subject to seasonal river flows, thus the plant will operate as an intermittent energy source. Conventional hydro uses reservoirs, which regulate water for flood control and dispatchable electrical power.
Hydroelectricity is electricity produced from hydropower. In 2015, hydropower generated 16.6% of the world's total electricity and 70% of all renewable electricity, and was expected to increase about 3.1% each year for the next 25 years.
The Skellefte River is a river in northern Sweden; one of the major Norrland rivers..
The power plant was operational in 1961. It is owned and operated by Vattenfall. [1] [2]
Vattenfall is a Swedish power company, wholly owned by the Swedish state. Beyond Sweden, the company generates power in Denmark, Finland, Germany, the Netherlands, and the United Kingdom.
Vargfors Dam consists of one concrete arch dam and two additional embankment dams.
An arch dam is a concrete dam that is curved upstream in plan. The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, compressing and strengthening the structure as it pushes into its foundation or abutments. An arch dam is most suitable for narrow canyons or gorges with steep walls of stable rock to support the structure and stresses. Since they are thinner than any other dam type, they require much less construction material, making them economical and practical in remote areas.
The power plant contains 1 Francis- and 1 Kaplan turbine-generator. The total nameplate capacity is 122 MW. Its average annual generation is 452 GWh. The hydraulic head is 49 m. [1] Maximum flow is 136 m³/s. [2]
The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts.
The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.
Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum.
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