比例谐振双馈风力发电双PWM变换器的研究

双PWM变换器是双馈风力发电系统的控制核心，传统的控制方式多是结合PI控制器的。在电网不平衡的情况下PI控制方法很难保证控制需求。本文采用了PR（比例谐振）控制方法，该控制器可以在保证系统无静差输出和转子侧有功功率和无功功率解耦控制的同时，省去耦合项和前馈补偿项，减少坐标变换的次数，还可以有效的减小电网频率偏移对逆变器输出电感电流的影响，从而提高了控制算法的精度和电网的电能质量。通过仿真试验结果分析验证了系统的可行性与正确性。

Proportion Resonance Doubly-fed Wind Power Generation Double PWM Converter

Double PWM converter is the control core of doubly-fed wind power system. The traditional control mode is more combined with PI controller.Under the power grid is not balanced, PI control method is very difficult to guarantee control requirements. This paper used the PR (proportion resonance) control method, The controller can guarantee the system without the static sent output and rotor side active power and reactive power decoupling control , and saves coupling term and a feed-forward compensation, reduces the number of coordinate transformation, still can effectively reduce the power grid frequency offset influence the inductance current of the inverter output , so as to improve the control precision of the algorithm and the grid power quality. Through the simulation test and the results analysis verify the feasibility and accuracy of the theory.