非正弦电压下的单相无功电流检测方法

Detection method of single phase reactive current under non-sinusoidal voltage

在检测单相电路的无功电流时,瞬时无功理论在电压正弦时能够检测出系统的无功电流,但是需要构造三相电路,算法复杂,实时性差并且在电压非正弦时出现了检测误差.为了消除检测误差,采用一种单相无功电流检测新方法,通过检测出系统基波电压的相位值和简化算法来准确检测出系统的无功电流.理论分析和仿真验证表明,在电压非正弦时此算法可以准确地检测出系统的无功电流.

The reactive current can be detected accurately by the traditional theory of instantaneous reactive power when the voltage is sinusoidal in detected single phase.The traditional theory must build three phases before detection.The algorithm is complex and the real-time performance is bad.At the same time,the traditional theory leads to calculation error when the voltage is non-sinusoidal.A simple detection algorithm of single-phase reactive current is used for eliminating calculation error.The reactive curre...