For wind power generation, the concept of how many levels of wind power is used is too rough. Due to different generator capacities, the requirements for wind speed are also somewhat different. However, generally if the wind speed exceeds 3m/s, the wind turbine can generate electricity. However, wind power generation does not depend on how high the local wind speed can reach, but on how long the local wind farm that generates electricity for this wind turbine can operate per year. Based on the current wind power subsidy price set by the state, if the power generation time is less than 2,000 hours that year, there will be no profit.
Permanent land acquisition is generally based on the machine position of 25*25 meters. If there is a box-type transformer, it must be added. The land occupied by the booster station is also subject to permanent land acquisition.
Attempts to use wind power to generate electricity began as early as the beginning of the twentieth century. In the 1930s, Denmark, Sweden, the Soviet Union and the United States applied rotor technology from the aviation industry and successfully developed some small wind power devices.
This kind of small wind turbine is widely used in windy islands and remote villages. The cost of generating electricity is much lower than that of a small internal combustion engine. However, the power generation capacity at that time was relatively low, mostly below 5 kilowatts.
Extended information:
China’s development:
2006 In 2007, China had a total of 6,469 wind turbines, of which MW units accounted for 21.2%. In 2007, this proportion jumped to 38.1%, an increase of 16.9 percentage points. In 2007, the cumulative installed capacity of global wind power reached 94,100 MW, an increase of 27% from 74,200 MW in the previous year.
In 2007, China's installed wind power capacity was 6.05 million kilowatts, achieving the 2010 planning target three years ahead of schedule; in the six years from 2001 to 2007, China's wind power installed capacity increased 14 times; in 2007 alone , China's wind power installed capacity increased by 3.449 million kilowatts, which is more than the cumulative total of China's wind power in history. With the rapid development of the wind power industry, the supply of wind power equipment exceeds demand.
Baidu Encyclopedia-Wind Turbine