China is rich in wind energy resources and has great potential for developing wind power. According to relevant information, China's land wind resources can be developed 2.38 billion kilowatts, offshore wind resources can be developed about 200 million kilowatts. The wind energy resources in China are relatively concentrated, and the potential wind energy resources in coastal islands account for about 80% of the national total in the "Three Norths" (North, Northeast and Northwest) and southeastern coastal areas. The geographical distribution of wind resources and coal resources is highly coincident Degrees, and the power load is an inverse distribution.
The permanent magnet synchronous wind power generator has become the focus of another important wind power generator following doubly-fed induction wind turbine due to the advantages of low mechanical loss, high operation efficiency and low maintenance cost. It has been gradually put into use. The basic structure of permanent magnet synchronous wind power generation system is shown in Fig. 1, which is mainly composed of wind turbine, permanent magnet synchronous motor, frequency converter and transformer.