比率制动电荷量线路差动保护  

Ratio-restraining Differential Protection of Lines Based on Charge

作　　者：孔令号[1] 焦彦军[1] 戴志辉[1] 崇志强[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电力系统自动化》2014年第24期91-95,共5页Automation of Electric Power Systems

基　　金：中央高校基本科研业务费专项资金资助项目(11MG38)~~

摘　　要：文中提出了差动电荷量和制动电荷量的概念,并分析了两者间的关系。提出了将两者作为差动量和制动量的比率制动电荷量线路差动保护判据及其整定原则,利用全波电流识别区内外故障。阐述了保护判据抗电流互感器饱和、避免电容电流影响的思路。仿真验证结果表明：区内故障时,保护判据利用故障后5~10ms内的数据能快速准确识别故障;区外故障时,判据能可靠闭锁。The ideas of differential charge and restraining charge are proposed along with an analysis of their relationship. Based on the ideas, a ratio-restraining differential protection criterion for lines and its setting rules are presented. The protection criterion is able to identify internal and external faults based on full wave current. The idea of avoiding the influence of anti-TA saturation and capacitive current is enumerated. Finally, simulation results show that the proposed protection criterion is capable of quick and accurate identification of an internal fault within 5 - 10 ms and reliable lockout protection during an external fault.

关 键 词：差动电荷量 制动电荷量 全波电流 线路差动保护 

分 类 号：TM773[电气工程—电力系统及自动化]