300MW机组6kV厂用电动机低电压保护误跳闸分析  

Analysis on the fault trip of under voltage protection for 6kV plant motor in 300MW Unit

作　　者：申爱兵[1] 韩军厂 

机构地区：[1]沈阳工程学院研究生部,沈阳110136 [2]国家电网大连培训中心,辽宁大连116023

出　　处：《沈阳工程学院学报（自然科学版）》2013年第3期251-253,共3页Journal of Shenyang Institute of Engineering:Natural Science

摘　　要：发电厂厂用电动机的低电压保护接线正确与否,是机组安全运行的根本保证.以湖南某2×300 MW机组电厂1#机整组启动前进行发电机空载特性试验期间,手动降低发电机励磁电流时,现场运行的6kV电动机全部跳闸,电气试验因此中断的事故为例,通过对设计院和开关厂家安装图,以及现场6kV电动机开关的实际安装接线的比较分析,得出了事故发生的具体原因,并提出了相应的处理措施.In the thermal power plant,it is the fundamental guarantee for the safe operation of the generator that the wiring of the under voltage protection of the plant motors served for the generator.In this paper,the fact is introduced that the electrical experiments on the No.1 generator in a 2×300 MW thermal power plant in Hunan Province were interrupted because all of the plant motors of the generator tripped when the field current was decreased with manual operation during the no-load characteristic test to the generator before the unit will be launched.Through the comparative analysis of the installation drawings offered by the design institute and switch factory respectively,and the actual installation wiring in the plant,the exact cause of the accident is given,and the corresponding treatment is proposed too.

关 键 词：低电压保护 保护逻辑图 测控装置 闭锁 

分 类 号：TM307[电气工程—电机]