Developing wind power generation is an important energy strategy in China at present. In the past 10 years, China’s wind power generation has developed rapidly. By the end of 2018, China’s installed capacity of wind power generation reached 185000 MW, ranking first in the world, far exceeding any other country in the world, and more than twice that of the United States, ranking second. Wind power generation also ranks first in the world with 36.6 billion kwh.
The rapid development of wind power generation has also promoted the great progress of wind power generation technology in China. China’s wind turbine manufacturers can manufacture generator sets with large single unit capacity. CCTV news and other media reported on April 28 that the first domestic 8mW offshore wind turbine gw175-8mw was hoisted at the Three Gorges Fuqing Xinghua Bay offshore wind farm. This is the wind turbine with the largest single unit capacity that has been hoisted in domestic offshore wind farms, breaking a new record of China’s offshore wind turbine single unit capacity.
How big is the wind turbine with the largest single unit capacity? According to the data, the hub center height of the unit is 110 meters, which is equivalent to the height of a 36 storey building. The length of a single blade is 85.6 meters. The base height plus the height of the blade top can reach about 195 meters. Its impeller diameter is 175 meters. The wind swept area of the wind wheel is equivalent to 3.4 football courts. When the rotation speed is the fastest, the speed of the blade top is close to 100 meters per second. Under the wind speed of about 12 meters / second (the most ideal condition), A single unit can generate 200000 kilowatt hours a day, which can supply 35000 households with electricity.
The research and development and production of large-capacity wind power prototype can help improve the unit wind energy utilization rate, reduce the cost of wind power generation, reduce the area of wind farms, and improve the utilization rate of land and sea, which has many positive meanings. Therefore, wind power manufacturers all over the world are committed to the research and development of larger single unit capacity wind turbines.
However, the eight megawatt wind turbine of the Three Gorges Fuqing wind power plant mentioned above is not the world’s largest. At present, the world’s largest wind turbine is the haliade-x 12MW offshore wind turbine manufactured by general motors of the United States. The blades of this wind turbine are 107 meters long, the diameter of the blade runner is 220 meters, the height of the hub of the turbine is 135 meters, and the maximum height of the blade tip is 260 meters, which is equivalent to the height of an 80 story building, The unit outside the blade weighs 700 tons and can generate 67million kilowatt hours of electricity every year.
