TV二次回路多点接地引起的纵联保护误动分析  

Pilot Protection Malfunction Analysis Caused by TV Secondary Circuit Multi-point Earthing

作　　者：张国辉 王昕 王军 赵斌超 黄秉青 

机构地区：[1]国网山东省电力公司电力科学研究院,济南250003

出　　处：《山东电力技术》2017年第1期32-35,共4页Shandong Electric Power

摘　　要：分析两起由TV二次回路多点接地引起纵联保护误动作案例,并对纵联保护误动的机理进行研究。当TV二次回路存在多个接地点时,分析发生接地故障时二次回路中性线上的偏移电压特性,发现导致纵联保护不正确动作的原因是方向元件误判。The mechanism of the pilot protection malfunction is studied based on the analysis of two pilot protection malfunctions caused by TV secondary circuit multi-point earthing.Offset voltage characteristics of the secondary circuit neutral line is analyzed when there are several ground points in the TV secondary circuit, and it is find that the cause of incorrect action of pilot protection is the direction element misjudgment.

关 键 词：TV二次回路 多点接地 纵联保护误动 机理分析 

分 类 号：TM77[电气工程—电力系统及自动化]