摘要
以瞬时无功功率理论为基础,对传统的三相四线谐波电流检测方法进行了误差分析。在此基础上,提出了一种改进的实时检测谐波电流方法:即在低通滤波器之后加入PI调节器,同时用A相正序基波单元代替传统的锁相环获取A相正序电压。通过与传统方法进行仿真比较,证明了这种改进检测方法的实时性与正确性。
Based on the instantaneous reactive power theory, a new real-time method for three-phase four-wire harmonic current detection is proposed. Two modified points are presented. One is to add a PI regulator after LPF, the other is to replace the traditional PLL by a fundamental positive sequence voltage selected unit. By simulation of MATLAB, the new method is proved to be able to improve the accuracy of harmonic current detection and meet the request of dynamic compensation.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2005年第3期8-12,共5页
Journal of North China Electric Power University：Natural Science Edition
