【摘要】 为了解决谐波电流检测方法中锁相环和滤波器所引起的检测误差和延时问题,对单相电路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,引入了平均值理论,解决了锁相环对检测准确性和低通滤波器对检测实时性的影响,提高了检测的准确性,加快了动态响应速度。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(P LL) a nd compensate the delay of the low pass filter(LPF) on harmonics detection,the method of separating active currents in single-phase circuit is studied deeply and a new detecting method is proposed.T he PLL is omitted and average theory is used in this method,s o that the problem of detecting accuracy induced by PLL and real-time induced by LPF is solved,the detection accuracy is improved and the speed of dynamic response is accelerated.It is testified through analysis and simulation,that the method has little delay time and has a good real-time quality.更多还原