一种远程非同步的工频信号相位差测量方法  

Remote asynchronous measurement method for phase difference of power-frequency signals

作　　者：傅中君[1,2] 王建宇[1] 周根元[2] 白凤娥[2] 欧云[3] 

机构地区：[1]南京理工大学,南京210094 [2]江苏理工学院,常州213001 [3]常州外国语学校,常州213001

出　　处：《仪器仪表学报》2015年第5期1039-1046,共8页Chinese Journal of Scientific Instrument

基　　金：常州市科技计划项目(CC20130029)资助

摘　　要：该方法采用非整数谐波分析算法抑制长范围和短范围频谱泄漏,引入220 V市电信号作为参考信号实现相位差的远程测量和非同步测量,通过牛顿迭代初相计算方法精确计算类正弦信号的初相和相位差。仿真实验和工程应用证明:本文方法可以在±1%频率漂移范围内远程非同步地精确测量正弦和类正弦信号的相位差,具有较高的工程应用价值。The phase difference measurement of power-frequency signals is widely used in power systems and other fields. A remote asynchronous phase difference measurement method based on the non-integer discrete fourier transform（ NIDFT） is presented in this paper.This method adopts the NIDFT algorithm to suppress the long-range and short-range spectral leakage significantly,and uses the 220 V power signal as a reference to measure the phase difference remotely and asynchronously. Furthermore,the initial phase calculation method based on Newton iteration is adopted to accurately calculate the initial phase and phase difference of sine-like signals. Simulations and engineering applications show that this method can measure the phase difference of sine and sine-like signals within the frequency drift range of ± 1%,accurately,remotely and asynchronously. Therefore,this method has a promising future in engineering applications.

关 键 词：相位差 工频信号 谐波分析 非整数谐波分析 初相 

分 类 号：TM933[电气工程—电力电子与电力传动] TH701[机械工程—仪器科学与技术]