应用于配电网电容电流检测的相位比较方法  

The Method of Phase Comparison Applied to Capacitor Current Detection in Distribution Network

作　　者：张杰[1] 郑逸凡 ZHANG Jie;ZHENG Yifan(Hubei Collaborative Innovation center for high-efficiency utilization of solar energy in Hubei University of Technology, Hubei, Wuhan 430000,China)

机构地区：[1]湖北工业大学太阳能高效利用湖北省协同创新中心,湖北武汉430068

出　　处：《湖北工业大学学报》2019年第1期44-47,共4页Journal of Hubei University of Technology

摘　　要：配电网电容电流测量方法中,二频法和谐振法都需要测量电压互感器开口三角形侧电压、电流信号的相位差来进行相应的计算,因此提出一种带FIR数字工频滤波的相位比较方法,该相位比较方法包括FIR数字工频滤波单元、相位延时消除单元以及相位比较单元,对各单元原理和实现过程进行了详细的介绍,并通过仿真验证所提方法的正确性。结果表明该方法可以消除电力系统工频干扰,精确测量电压互感器开口三角形侧电压、电流相位差。In the capacitance current measurement method of distribution network, both the two-frequency method and the resonant method need to measure the phase difference of the open triangular side voltage and current of the voltage transformer to carry on the corresponding calculation. In this paper, a phase comparison method with FIR digital power frequency filter is proposed. The phase comparison method includes FIR digital power frequency filter unit, phase delay cancellation unit and phase comparison unit. The principle and the implementation process of each unit are introduced in detail in this paper, and the correctness of the proposed method is verified by simulation. The results show that this method can eliminate the power frequency interference and accurately measure phase difference of the open triangular side voltage and current.

关 键 词：电容电流测量 FIR数字工频滤波 相位比较 

分 类 号：TM930.12[电气工程—电力电子与电力传动]