论文信息 - Study on control system of low speed PM generator direct driven by wind turbine

Study on control system of low speed PM generator direct driven by wind turbine

The rotor of a typical wind turbine rotates at a speed of 20-100 rpm. In conventional wind power plants the generator is coupled with the turbine via a gearbox so that it can rotate at a speed of 1000 r/min or higher. However, the gearbox brings weight, generates noise, needs regular maintenance and increases losses. There is currently a great deal of interest in directly driven generators. In a directly driven, low-speed wind generator no gears are needed and these disadvantages can be avoided. This paper introduces the control system of a permanent magnet (PM) generator direct driven by a variable speed wind turbine with rated power in the region of 10-50 kW. The wind generator can be either grid connected or stand alone as a distributed power supply. The system design, control strategy and implementation method based on the PIC single-chip-computer for a practical 20 kW PM generator direct driven by wind turbine are introduced in detail. The dynamic performance simulation results under optimal power control during the wind speed variation are presented

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