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St. Leon Wind Farm is Manitoba's first wind farm, in St. Leon, Manitoba, Canada. In the first phase 63 wind turbines were erected over a area, capable of delivering 99 megawatts (MW).〔(St. Leon Wind Farm )〕 In 2011 a further 10 turbines were purchased, expanding the capacity of the project to 120 megawatts.〔http://www.winnipegfreepress.com/breakingnews/the-winds-picking-up.html Martin Cash ''The Wind's Picking Up'', Winnipeg Free Press July 27, 2011〕 ==Wind turbines== Each turbine has three blades made with carbon fiber and balsa wood. Each blade is long. The nacelle containing the gearbox and generator is mounted on a tubular steel tower. The assembly of blades, hub, gearbox, and generator, in total weighs around 220 tonnes. The blades turn at 14 revolutions per minute when the generator is turning at 1200 RPM; the speed increase makes the generator more compact and the overall system more efficient.〔http://www.gov.mb.ca/stem/energy/wind/files/stleons_wind_brochure.en.pdf Province of Manitoba brochure on the St. Leon wind farm, retrieved 2010 Nov 23〕 Each tower has a concrete foundation which extends between below grade. The generators produce AC power at around 600 Volts and 60 Hertz. Each tower has a step-up transformer connecting the turbine by an underground cable to the 35 kV overhead wood pole line collection network. The collection network connects the turbines to a step-up transformer station, where the voltage is increase to 230 kV and connection is made to the Manitoba Hydro transmission network. Manitoba Hydro has a 25-year power purchase agreement with Algonquin Power Income Fund, which owns and operates the wind farm. The Danish-built turbines are designed to operate on wind speeds between . In very cold weather, or lower, the units are shut down. About 90% of the year there is sufficient wind to operate the turbines, although not necessarily at full output. In recent years the project has generated at a 35-to-40% annual capacity factor, due to its favorable site. The array is dispersed over of farmland on the Pembina Escarpment, about south-west of Winnipeg, Manitoba, in the rural municipalities of Lorne and Pembina. About five per cent of the area is covered by access roads and foundation sites, leaving the rest available for crops or cattle grazing. Each of the fifty area landowners is paid for the use of the land occupied by a turbine. The capital cost of the first phase of the project was around C$200 million. About $30 million was provided by the federal Wind Power Production Incentive. The 2011 expansion cost an additional $30 million; the additional turbines were in operation by the spring of 2012. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「St. Leon Wind Farm」の詳細全文を読む スポンサード リンク
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