基于参数辨识原理的输电线路智能保护方法  

Intelligent Protection Method for Transmission Line Based on Parameter Identification Principle

作　　者：罗显通[1] 文雨[2] 杨莹 

机构地区：[1]重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆市电力公司调度通信中心,重庆400014 [3]重庆沙坪坝供电局,重庆400030

出　　处：《华东电力》2010年第5期681-685,共5页East China Electric Power

基　　金：高等学校学科创新引智计划(111计划)项目(B08036)

摘　　要：智能电网对继电保护的智能化提出了更高的要求,寻求快速准确地反应故障,实现电网故障在线辨识的保护方法,是智能保护的发展方向。通过合理设置阀值,结合两种基于参数辨识原理的单端快速测距算法,提出一种智能保护方法。该方法依据粗略计算过渡电阻的大小选择测距算法,使保护更加快速准确地判断故障。EMTP仿真表明该保护算法计算时间短,不受过渡电阻及系统运行方式的影响,能快速准确地求取故障点到保护安装处的距离。The smart grid has set a higher request to the intellectualization of relay protection.Seeking a protection method of fast and accurately responding to the faults and realizing online identification of the power grid faults is the development direction of intelligent protection.By reasonably setting the threshold values and combined with two fast single-terminal fault location algorithms based on the parameter identification principle,an intelligent protection method was proposed.The method selected the location algorithm through roughly estimating the transition resistance,which enabled the protection to diagnose the faults more quickly and accurately.EMTP simulation showed that the protection algorithm required short computation time and was not influenced by the transition resistance and the system operation mode.The algorithm could also quickly and accurately calculate the distance between the fault position and the protection installation.

关 键 词：智能保护 参数辨识 故障距离 瞬时序分量 EMTP仿真 

分 类 号：TM72[电气工程—电力系统及自动化]