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Turbines used in wind farms for commercial production of electric power are usually three-bladed. These have low torque ripple, which contributes to good reliability. The blades are usually colored white for daytime visibility by aircraft and range in length from 20 to 80 meters (66 to 262 ft).
Alstom Wind (Spain) – subsidiary of General Electric since 2015; Enron Wind (now defunct) – wind-turbine manufacturing assets bought by General Electric in 2002; Fuji Heavy Industries (Japan) – the wind turbine business was acquired by Hitachi in 2012; Gamesa (Spain) NEG Micon (Spain) – was bought by Gamesa; NEG Micon – now part of Vestas
This list also includes the most powerful onshore wind turbines, although they are relatively small compared to the largest offshore ones. As of June 2024, the most powerful wind turbine in operation is the world's first 18MW semi-direct drive offshore wind turbine, developed by Dongfang Electric Corporation. [ 1 ]
The first municipal use of multiple wind-electric turbines in the USA may have been a five turbine system in Pettibone, North Dakota in 1940. These were commercial Wincharger units on guyed towers. [16] In 1980, the world's first wind farm, consisting of twenty 30 kW wind turbines was installed at Crotched Mountain, in New Hampshire. [17]
Share of electricity production from wind, 2023 [54] Wind energy penetration is the fraction of energy produced by wind compared with the total generation. Wind power's share of worldwide electricity usage in 2021 was almost 7%, [55] up from 3.5% in 2015. [56] [57] There is no generally accepted maximum level of wind penetration.
At Golden Hills (Wind Energy projects, California) dogs found 71 bat fatalities in 55 searches compared to 1 bat found by humans in 69 searches within the same search plots over the same season ...