微机保护装置滤除衰减直流分量的算法分析  

Analysis on Filtering Algorithm for Decaying DC Component in Microcomputer-Based Relay

作　　者：胡明 

机构地区：[1]许继集团公司,许昌461000

出　　处：《电力系统及其自动化学报》2005年第4期36-40,共5页Proceedings of the CSU-EPSA

摘　　要：能否滤除非系统频率整数倍的谐波和衰减的直流分量是衡量保护算法抗干扰能力的重要特征。对傅里叶算法及其改进算法进行了分析,并介绍了小矢量算法的相关理论,对各种算法的滤除谐波和衰减直流分量的能力进行了分析和比较,最后给出了结论:当故障电流信号中存在衰减直流分量时,采用并联补偿傅氏算法能够兼顾速度和精度。A protection algorithm can be judged as having strong capability of anti-interference if it can eliminate decaying direct current component and high harmonic whose frequency is not the integer times of system base-frequency. After introducing the correlative theory of phaselet algorithm and analyzing Fourier algorithm and improved Fourier algorithm, the ability of eliminating harmonic current and decaying direct current component of these algorithms are analyzed and compared ,and conclusions are given.

关 键 词：微机保护算法 直流分量 傅里叶算法 小矢量算法 

分 类 号：TM771[电气工程—电力系统及自动化]