300MW机组电跳机保护拒动原因分析及解决方案  

Cause analysis and solution of electric tripping protection refusing to operate for 300 MW Unit

作　　者：叶春明 李勇 孙道阳 张国亮 姚从辉 Ye Chunming;Li Yong;Sun Daoyang;Zhang Guoliang;Yao Conghui(Huaneng Liaocheng Thermal Power Co Ltd,Liaocheng Shandong,252041)

机构地区：[1]华能聊城热电有限公司,山东聊城252041

出　　处：《电子测试》2021年第19期119-120,70,共3页Electronic Test

摘　　要：本文主要介绍300MW机组发变组保护动作后,电跳机出口启动热工ETS,保护拒绝动作的异常事件,经过对事件过程分析及多次试验,确定了电气保护与热工保护之间配合存在的问题,并采取了整改措施,确保电气保护动作后能正确启动热工ETS保护关闭主汽门,防止汽轮机超速事故的发生。This paper mainly introduces the abnormal event that the thermal ETS is started at the outlet of electric tripping and the protection refuses to act after the protection action of generator transformer unit of 300MW unit.Through the analysis of the event process and many tests,the problems existing in the coordination between electrical protection and thermal protection are determined,and the corrective measures are taken to ensure that the thermal ETS can be correctly started and the main steam valve can be closed after the electrical protection action,Prevention of turbine overspeed accident.

关 键 词：电跳机 关主汽门 非电量保护 延时功能 通道滤波参数 

分 类 号：TM621[电气工程—电力系统及自动化]