永磁直驱风力发电机输出电压控制策略

针对永磁直驱风力发电系统中机侧变换器交流侧与直流侧电压幅值之比不匹配的问题，提出一种永磁同步发电机输出交流电压的控制策略。所提控制策略是基于转子磁链定向下，来分析定子d轴电流分量i_sd与电机输出电压U_s之间的空间矢量关系，通过设定U_s的d轴最大分量为U_sdmax,来调节i_sd大小使输出电压与直流侧电压满足比例关系。并在仿真平台中搭建了永磁直驱风力发电机输出电压控制策略的仿真模型，该控制模型可以调节永磁同步发电机输出电压的幅值，使机侧变换器直流侧电压与交流侧电压满足比例关系，也验证了该控制策略的正确性和可行性。

Output Voltage Control Strategy of Permanent Magnet Direct-driven Wind Generator

In order to solve the problem of voltage amplitude ratio mismatch between AC side and DC side of generator side converter in PMSG wind power generation system, a control strategy to control the output voltage of the PMSG is proposed. The proposed control strategy is based on rotor flux orientation to analyze the space vector relationship between the stator d-axis current component isd and the motor output voltage Us. By setting the maximum d-axis component of Us as Usdmax, the isd size is adjusted to make the output voltage and DC side voltage meet the ratio relationship. And a simulation model of output voltage control strategy for permanent magnet direct-driven wind generator is built in the simulation platform. The simulation model can regulate the amplitude of output voltage of PMSG and make the DC side voltage of the side converter meet the voltage proportion of the AC side voltage. It also verifies the correctness and feasibility of the control strategy.