平行双回线系统中线路纵联方向保护动作特性研究  

Action Characteristic of Transmission Line Pilot Protection in Parallel Double-Circuit Lines System

作　　者：项忠华 陈晓东 叶远波[2] 

机构地区：[1]国网宣城供电公司,安徽宣城242000 [2]国网安徽省电力公司调度控制中心,安徽合肥230022

出　　处：《安徽电气工程职业技术学院学报》2015年第1期25-29,共5页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：文章深入研究了故障发生时电磁环网系统中线路保护的动作行为,当平行双回线路在强磁弱电联系运行方式下,一回线路末端发生接地故障时,非故障线路纵联零序方向保护会误动,而纵联负序方向保护不会误动。文章提出了一种新的基于负序方向元件综合判据,针对零序方向保护容易误动的情况,对新型的负序方向元件作为纵联方向保护进行了研究。The paper makes a deep research on the line relay operation behavior when the electromagnetic loop network system has the fault. When a ground fault occurs on the parallel double-circuit lines under the strong-magnetic and weak-current operation condition,the pilot zero sequence directional protection of the non-fault line may mal-function,while the pilot negative sequence directional protection is not so. To avoid the mal-function of the zero sequence,a new comprehensive criterion based on negative sequence directional element is proposed,a new pilot negative sequence directional protection scheme is also researched in this paper.

关 键 词：同杆多回线 强磁弱电 负序方向元件 线路保护 

分 类 号：TM773[电气工程—电力系统及自动化]