330 MW发电厂厂用电零序保护越级跳闸原因分析及处理  

Cause Analysis and Treatment of Override Tripping of AuxiliaryPower Zero Sequence Protection in 330 MW Power Plants

作　　者：雷振山 郭海骏 杨勇 康振华 朱佳 LEI Zhenshan;GUO Haijun;YANG Yong;KANG Zhenhua;ZHU Jia(Guoneng Zhumadian Thermal Power Co.,Ltd.,Zhumadian,Henan 463000)

机构地区：[1]国能驻马店热电有限公司,河南驻马店463000

出　　处：《能源科技》2024年第5期58-61,73,共5页Energy Science and Technology

摘　　要：国能驻马店热电有限公司(以下简称驻马店公司)1号机组厂变A分支零序过流动作跳闸,厂用电快切装置闭锁切换,导致6 kV IA段母线失电。对机组跳机原因进行分析,并提出了全新的6 kV厂用电设备微机综合保护装置校验及开关实际分闸时间测定方法,对分析保护时限配合以及实际厂用电保护定值整定的可靠性具有一定的参考价值。In Guoneng Zhumadian Thermal Power Co.,Ltd.(hereinafter referred to as the Zhumadian Company),the zero-sequence overcurrent action of the branch A of No.1 unit auxiliary transformer tripped,and the block switching of auxiliary power fast switchover device led to the loss-of-power of 6 kV section-IA bus.This paper analyzes the causes of the unit tripping,and puts forward new methods for checking the microcomputer integrated protection device of 6kV house-service equipment and measuring the actual opening time of the switch,thus providing certain references for analyzing the coordination of protection time limit and the reliability of setting the actual auxiliary power protection setting.

关 键 词：零序过流 闭锁切换 实际分闸时间 可靠性 

分 类 号：TM621[电气工程—电力系统及自动化]