CAJ | 학술논문

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。
위제고대용량유원려파기(APF)적내압수평화등효개관빈솔，제출료일충기우모괴화다전평(MMC)적유원려파기공제방법。해공제방법대APF수출적기파전류채용간접전류방식실현유공화무공적해우공제，채용기우정서기파제취기적예측해파전류공제실현대해파전류적보상，연후장간접전류방식화예측해파전류공제방식산생적전압신호작위유APF수출전압적삼고치。동시，위극복전통재파상이맥관조제방식균압공제배절PI공제기번다적결점，대재파상이맥관조제방식주료개진，채용재파상이맥관조제화전용전압배서균압공제상결합적조제방식。통과Matlab/Simulink대기진행료방진험증，해공제방법시정학가행적。
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. This work is supported by National Natural Science Foundation of China (No. 51177137).