中文摘要：

介绍了传统的基于平均有功功率单相电路谐波与无功电流检测方法,分析了该方法中电压畸变和低通滤波器对该方法带来的不利影响。提出了一种该方法的改进算法,新方法去掉了锁相环,引入平均值理论,从而缩短了系统的固有延时,提高检测的实时性,同时引入反馈,加快了动态响应速度。文章最后对新方法做了仿真,仿真表明,新方法比起传统算法可以更加精确、实时地检测出谐波。

英文摘要：

The traditional single-phase circuits based on the average active power harmonics and reactive current detec-tion methods is introduced, voltage distortion and low-pass filter the adverse effects of the method are analyzed. An improving method is proposed, in which phase-locked loop, is removed, the theory average is introduced, thereby re-ducing the delay inherent in the system, and reducing the detection time. As the introduction of feedback, faster dy-namic response is gotten. At last the simulation is done. Comparing with the traditional algorithm the simulation shows that the method is more accurate, and detects harmonies in real time.