【摘要】 为了解决谐波电流检测方法中锁相环和低通滤波器所引起的检测误差和延时问题,该文对单相电路的有功电流分离法进行了深入研究,提出了一种新的谐波电流检测方法。该方法去掉了锁相环,引入了反馈,从而解决了锁相环对检测准确性的影响,加快了动态响应速度,补偿了低通滤波器的延时。理论分析和仿真验证表明,该方法可以准确、实时地检测谐波电流。更多还原

【Abstract】 In order to reduce the error of the phase lock loop(PLL) and compensate the delay of the low pass filter on harmonics detection, in the paper, the method of separating active currents in single-phase circuit is studied deeply and a new detecting method is proposed . The PLL is omitted and feedback is introduced in this method, so that the effect of the PLL on the detection accuracy is solved, the speed of dynamic response is accelerated and the delay of low pass filter is compensated. It is testified through analysis and simulation, that the method has litter delay time and good real-time quality.更多还原