220kV钧州变电站过电压保护误动事故分析及改造方案的研究  

The overvoltage protection’s mistake to move trouble analysis of the 220 kV Junzhou transformer substation and the research of the reformation project

作　　者：叶东印 库永恒 倪有仁 贾占领 

机构地区：[1]许昌供电公司,河南许昌461000

出　　处：《电力系统保护与控制》2008年第24期97-100,共4页Power System Protection and Control

摘　　要：针对220kV钧州变电站过电压保护误动事故,通过对电压互感器的一次设备和二次回路做全面的检验,对过电压保护动作的过程和事故录波报告进行详细的分析,确认了手动合北母电压互感器刀闸过程中产生的较长时间的操作过电压直接进入交流电压二次回路是产生本次事故的根本原因。在现有基础上改进电压互感器开口三角绕组的二次回路设计原理,加装操作过电压进入PT二次回路的隔离措施,是完全可以解决现在过电压保护运行时存在的问题,满足继电保护的需要。The honored state transformer substation overvoltage protection moves the accident by mistake in view of 220KV, through makes the comprehensive examination to a voltage transformer＇s equipment and the secondary circuit, records the wave to the overvoltage protection movement＇s process and the accident to report that carries on the detailed analysis, confirmed north manual gathers the long time switching surge which in the female voltage transformer knife switch process produces directly to enter the alternating voltage secondary circuit has this accident＇s basic reason. Improves the voltage transformer aperture triangle winding＇s secondary circuit principle of design in the existing foundation, the addition switching surge enters the PT secondary circuit＇s quarantine measures, the problem which is now definitely may solve when overvoltage protection movement exists, satisfies the relay protection the need.

关 键 词：电压互感器 过电压保护 电磁暂态过程 电压并列 

分 类 号：TM63[电气工程—电力系统及自动化] TM77