电工技术学报2012，Vol.27Issue(8)：179-186,8.
基于综合阻抗比较原理的广域继电保护算法
A Study of Wide-Area Protection Algorithm Based on Integrated Impedance Comparison
摘要
Abstract
This paper extends integrated impedance protection to multiple terminal transmission system in order to realize wide area protection,and discusses integrated impedance definitions and calculation analysis.The integrated impedance reflects line capacitive reactance when external fault occurs,and its magnitude reaches several kilo-ohms and its impedance angle is in-90°or so.In contrast,the amplitude of integrated impedance is no more than 600？ and impedance angle is about ？？ ～90° when internal fault occurs.Then,the three-step protection scheme is also presented based on the different situation analyses caused by wide-area protection differential current activated,which always realizes transmission system reliable protection when internal fault,measurement errors or substation DC disappear occur.Simulation tests based on IEEE 10-machine and 39-bus system illustrate that this algorithm could be set conveniently and could select phase naturally,the fault estimation results are immune to distributed capacitive current and grounding resistance,which has helpful applied prospect in wide area protection domain.关键词
广域继电保护/综合阻抗/保护算法/保护分区/过渡电阻Key words
Wide area relaying protection/integrated impedance/protection algorithm/protection zone/grounding resistance分类
信息技术与安全科学引用本文复制引用
李振兴,尹项根,张哲,何志勤..基于综合阻抗比较原理的广域继电保护算法[J].电工技术学报,2012,27(8):179-186,8.基金项目
国家自然科学基金资助项目（50877031 （）
50837002） （）
