直驱式永磁同步风力发电系统最大功率追踪控制

Maximum Power Point Tracking Control of the Wind Energy Generation System With Direct-driven Permanent Magnet Synchronous Generators

为提高直驱式永磁同步风力发电系统最大功率追踪的效果,根据风力机的输出特性,阐明最佳特性曲线法实现风力发电系统最大功率追踪的原理,分析转速控制和功率控制方案的不足,提出基于最佳电磁转矩给定的最大功率追踪方案和一种适合于永磁同步发电机(pemanent magnet synchronous generator,PMSG)的转子初始位置检测方法。分别构建了以TMS320F2812DSP为控制核心的10kW风力机模拟系统和直驱式永磁同步风力发电系统,进行初始位置的检测、风速稳定和突变时系统的运行实验,实验结果验证了所提出的转子初始位置检测方法和最大功率追踪方案的有效性。

To improve the power point tracking （MPPT） performance of the maximum control of the wind energy generation system （WEGS） with direct-driven permanent magnet synchronous generators （PMSG）, the principle of MPPT control of the WEGS using optical characteristic curve was explained according to wind turbine output characteristics. The advantage and disadvantage of speed and power control in MPPT were analyzed. A novel MPPT control scheme based optimal electromagnetic torque reference and a new method for detecting initial rotor position of the PMSG were proposed. A 10 kW experimental prototype of the WEGS with direct-driven PMSG and the wind turbine simulator controlled by TMS320F2812 DSP have been developed respectively for the experiments of the initial rotor position detection and system operation at steady and step change wind speeds. Experimental results prove the effectiveness of the proposed initial rotor position detection method and the MPPT control scheme.