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Southwest Windpower (SWWP) was a wind turbine manufacturer established in 1987 based in Flagstaff, Arizona, United States.The company specialized in small, reliable battery charging wind generators that complement photovoltaics (solar energy or PV) in supplying energy to rural areas.
Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled with a yaw system. Most have a gearbox, which turns the slow rotation of the blades into a quicker rotation that is more suitable to drive an electrical generator. [ 40 ]
Wind turbines also generate noise. At a distance of 300 metres (980 ft), this may be around 45 dB, which is slightly louder than a refrigerator. At 1.5 km (1 mi), they become inaudible. [131] [132] There are anecdotal reports of negative health effects on people who live very close to wind turbines. [133]
Do it yourself or DIY-wind turbine construction has been made popular by magazines such as OtherPower and Home Power. [38] Organizations such as Practical Action have designed DIY wind turbines that can be easily built by communities in developing nations and are supplying concrete documents on how to do so. [39] [40]
This is useful for large variable speed wind turbines, because wind speed can change suddenly. When a gust of wind hits a wind turbine, the blades try to speed up, but a synchronous generator is locked to the speed of the power grid and cannot speed up. So large forces are developed in the hub, gearbox, and generator as the power grid pushes back.
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Oregon ranks among the top ten states with the most wind power installed. Climbing from 1 percent in the early 2000s (decade), wind power accounted for 12.4 percent of total electricity generated in Oregon during 2013. [11] [12] In 2009, 691 MW of wind-powered capacity was added in Oregon, the fourth biggest increase in the U.S. that year. [13]
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