摘要
通过对电流互感器(TA)饱和时电流特点的分析,提出了一种用于微机母线保护装置的TA饱和检测方案。该方案与基于瞬时值比率制动的差动保护相结合,在区外故障且TA饱和发生的情况下能够可靠闭锁保护,当发生区外转区内故障时能够快速开放保护。已有采用此方案的微机母线保护装置在电力系统中运行。
Based on the features of saturated current analyzed, the detecting method of TA saturation used in microcomputer bus protection is presented in this paper. Combined with sampling arithmetic for differential current protection, this method ensured that bus protection can be locked reliably when external fault and TA saturation and disparked quickly when internal fault occur after external fault. Some protective relays using the theory has been served in electric power system.
出处
《电力科学与工程》
2008年第8期14-16,共3页
Electric Power Science and Engineering
关键词
微机母线保护
TA饱和检测
microcomputer bus protection
TA saturation check
