基于DFT的非同步采样情况下相量测量误差研究综述  

Survey of phasor measurement errors on DFT-based non-synchronous sampling

作　　者：闫常友[1] 张涛[2] 杨奇逊[1] 

机构地区：[1]华北电力大学电力工程系,北京102206 [2]北京四方继保自动化有限公司,北京100085

出　　处：《继电器》2004年第10期80-84,共5页Relay

摘　　要：首先介绍了相量测量及其标准,然后简单描述了DFT和递归DFT算法。电网的频率往往是波动的,使采样很难做到对被测信号进行整周期截断,FFT算法的栅栏效应和泄漏现象将会导致较大的测量误差[8]。讨论了几种常用的减小误差的方法,最后说明了相量误差校正的现实性和重要性。This paper introduces the measurement and the standard of phasor measurement, and then presents DFT and recursive DFT algrithm generally. The frequency of the grid is always fluctuating, which makes the sampling signals non-synchronous. And the railing effect and leakage of FFT algorithm will result in obvious measurement errors.This paper discusses several methods of diminishing several measurement errors, and indicates the feasibility and fundamentality of error correction for phasor measurement in a conclusion.

关 键 词：相量测量 相量误差 DFT 同步采样 傅里叶算法 频谱分析 

分 类 号：TM933[电气工程—电力电子与电力传动]