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Porjus Hydroelectric Power Station
Porjus power station ((スウェーデン語:Porjus kraftverk)) is one of the oldest and largest power plants in Sweden, situated near Porjus. It was built 1910-1915 and has a power of 480 MW. Besides three-phase AC, the plant originally also generated single phase 15 Hz AC for railway traction and hence, two single-phase 80 kV power lines ran along the Iron Ore Line Malmbanan where it was transformed down to 16 kV in substations. However this system was later abandoned in favor of rotary converter stations. The original machines for single phase AC were subsequently scrapped.
The construction of the Porjus power station out in the wilderness is considered a pioneering achievement. The material for the founding work had to be carried in backpacks over a 44 km (3000 feet) trail in uninhabited land before any infrastructure was built. In the early 1970s, a new power station was built but the old monumental brick building has been kept as a cultural heritage site with most of the machinery intact, with Vattenfall doing daily tours for visitors during the summertime. The station is actually the third largest.
Just downstream of the station is Harsprånget Hydroelectric power station. With 977 MW, it is the largest hydroelectric power station in Sweden.
==External links==
*, illustrated description of the Iron Ore line and the Porjus Power Station
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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