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Walchensee Hydroelectric Power Station
The Walchensee Power Plant () is a hydroelectric power station in Bavaria Germany. It is a storage power station that is fed water from the Walchensee Lake which is then released into the Kochelsee Lake. The original installed output was 124 MW. The power plant is located south of Kochelsee, about from the village of Walchensee, and generated 300 MW as of 2010. It is one of the largest of its kind in Germany.〔http://apps.eon.com/documents/EWK_Walchensee_2010_ger.pdf〕
==Technical operation==
The power station uses the hydraulic head of about between the Walchensee (acting as the upper reservoir, at above sea level) and the Kochelsee ( a.s.l.) to generate electricity.〔http://www.oberland.de/Woher-kommt-eigentlich-das-Isa.253.0.html〕 Through six ducts connecting the two natural lakes, the water flows to the hydro-electric plant's four Pelton water turbines with single-phase generators and four Francis water turbines with three-phase generators, which then exits into the Kochelsee.〔(【引用サイトリンク】url=http://apps.eon.com/documents/EWK_Walchensee_2010_e_eng.pdf )〕 Because the water level constantly changes, neither lake fully freezes in the wintertime; what does freeze over the lakes is potentially hazardous thin ice. The natural outflow of the Walchensee at Niedernach—over the Jachen to the River Isar—is blocked by a weir, but the natural inflow to the lake is still insufficient to provide enough water to the reservoir for the operation of the power station, so the waters of the Rißbach river are also used.
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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