采用不同判据的纵联零序方向保护运行风险分析  

作　　者：于洋 杨瑞金 邵庆祝 俞斌 杨铖 栾喜臣 麦立 张骏 

机构地区：[1]国网安徽省电力有限公司调度控制中心,安徽合肥230022 [2]国网安徽省电力有限公司检修公司,安徽合肥230022

出　　处：《科技创新与应用》2019年第34期60-62,65,共4页Technology Innovation and Application

摘　　要：纵联零序方向保护为适应弱电强磁的运行环境,增加了负序功率辅助判据等功能,然而在实际应用中,出现了线路两侧采用不同判据的纵联零序方向保护配合错误的问题。文章从某220kV线路发生的一起区外误动的事故出发,对故障分量和装置的动作行为进行了深入分析,并提出了改进措施。The longitudinal zero-sequence direction protection is suitable for the operating environment of weak electric and strong magnetic,and the functions of negative sequence power assisted criterion are added.However,in practical applications,the longitudinal zero-sequence direction protection coordination error with different criteria on both sides of the line appears.In this paper,from the accident of a 220kV line that has been misfired outside the area,the fault component and the action behavior of the device are analyzed in depth,and improvement measures are proposed.

关 键 词：零序方向 负序方向 弱电强磁 

分 类 号：TM773[电气工程—电力系统及自动化]