CAJ | 학술논문

　　为实现脉冲宽度调制(pulse width modulation，PWM)整流器的功率预测，采用直接功率预测算法，并设置了3个控制目标，即消除负序电流、消除有功功率波动、消除无功功率波动。为提高控制精度，采用T/4延时法(T=0.02 s)，只提取正序电流分量和负序电压分量，无需提取负序电流分量，进而针对3个控制目标分别进行不同的功率项补偿。算例结果证明了该方法的有效性。
　　위실현맥충관도조제(pulse width modulation，PWM)정류기적공솔예측，채용직접공솔예측산법，병설치료3개공제목표，즉소제부서전류、소제유공공솔파동、소제무공공솔파동。위제고공제정도，채용T/4연시법(T=0.02 s)，지제취정서전류분량화부서전압분량，무수제취부서전류분량，진이침대3개공제목표분별진행불동적공솔항보상。산례결과증명료해방법적유효성。
To implement power control of pulse width modulation (PWM) rectifier, a control algorithm based on direct power prediction is adopted and three control objectives, namely the elimination of negative-sequence current, the elimination of active power fluctuation and the elimination of reactive power fluctuation, are set. To improve control accuracy, the time-delay of quarter cycle is utilized where the length of a cycle is 0.02 s, thus only positive-sequence current component and negative-sequence voltage component are extracted, and it is not needed to extract negative-sequence current component;and then different power compensations for the three control objectives are performed respectively. Case calculation results show that the proposed method is effective.