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中文摘要：
为提高大容量有源滤波器（APF）的耐压水平和等效开关频率,提出了一种基于模块化多电平（MMC）的有源滤波器控制方法。该控制方法对APF输出的基波电流采用间接电流方式实现有功和无功的解耦控制,采用基于正序基波提取器的预测谐波电流控制实现对谐波电流的补偿,然后将间接电流方式和预测谐波电流控制方式产生的电压信号作为有APF输出电压的参考值。同时,为克服传统载波相移脉宽调制方式均压控制环节PI控制器繁多的缺点,对载波相移脉宽调制方式做了改进,采用载波相移脉宽调制和电容电压排序均压控制相结合的调制方式。通过Matlab/Simulink对其进行了仿真验证,该控制方法是正确可行的。
英文摘要：
In order to improve withstand voltage level and equivalent switching frequency,the paper proposes a new control method of active power filter（APF） based on modular multilevel converter（MMC）.The control method realizes the decoupling control of active and reactive power by indirect current loop,compensates harmonics current by predictive current loop based on the positive sequence fundamental extractor.The indirect current control along with the predictive current control will generate a combined voltage reference to APF output voltage.Meanwhile,in order to overcome the shortcomings of a large number of PI controller in carrier phase shifted pulse width modulation,the paper uses modulation of the carrier phase shifted PWM along with voltage balancing strategy based on sort of capacitors voltage.Simulation results in MATLAB/Simulink show that the method is correct and feasible.
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