基于全频移相网络的电功率精确测量方法  

Precise Power Measurement Based on All-Pass Phase-Shifting Network

作　　者：吴红莲[1] 金向东[1] 魏柠柠[1] 

机构地区：[1]浙江大学信息学院,杭州310027

出　　处：《电力系统及其自动化学报》2006年第1期53-57,共5页Proceedings of the CSU-EPSA

摘　　要：针对越来越多的非线性电气器件及装置对电力系统的影响和危害,提出一种基于全频移相网络的电气参数精确测量方法。该方法适合于测量含有高次谐波的非正弦电路中的电气参量。所设计的全频移相网络能对多种频率信号恒定相移90,°具有优越的相频特性和幅频特性。在高次谐波存在的环境下,对电压、电流信号采样后,直接通过移相网络和简单的数值计算即可实时并精确地测量出无功功率、有功功率等电气参量。最后,对用单片机实现的该测量方法进行仿真和分析,结果表明,该方法具有实时、高精度的优点,并且可以用普通单片机来实现。A method based on all-pass phase-shifting network is proposed for power measurement. The method is suitable for high harmonics non-sinusoidal conditions. The designed network can be used to realize the -90 degree phase shift, which has excellent phase response and amplitude response. Under the high harmonics condition, after sampling the voltage and current signals, the real power, reactive power and other electrical parameters can be accurately and real-timely measured by directly implementing phase-shifting network and some simple calculation. Simulation is performed to analyze the performance of the measurement realized using a SCM. The result demonstrates that the method is real time, high accurate and can be simply realized by a SCM.

关 键 词：全频相移网络 无功功率 有功功率 视在功率 相对移相滤波器 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]