泵站6 kV系统改造后机组不能启动的原因分析与故障排除  

Cause Analysis and Troubleshooting of Unit Failure to Start after Reconstruction of 6 kV System in Weicun Pumping Station

作　　者：王亚乒 杨金忠 WANG Yaping;YANG Jinzhong(Changzhou Urban Flood Control Project Management Department,Changzhou 213127,China;Menghe Town Rural Work Bureau,Xinbei District,Changzhou 213129,China)

机构地区：[1]常州市城市防洪工程管理处,江苏常州213127 [2]常州市新北区孟河镇农村工作局,江苏常州213129

出　　处：《电工技术》2021年第21期115-116,共2页Electric Engineering

摘　　要：魏村泵站6 kV系统改造后,高压同步电机水泵机组不能启动,经原因分析和故障排查发现是由励磁装置中可控硅触发顺序不正确导致的。阐述了可控硅元件导通与关断条件,通过三相交流电源波形图和三相桥式整流电路,分析三相桥式整流电路输出可控的直流电流必须满足的条件,并提出了故障排除方法,可为三相桥式可控整流电路的同步(定相)问题提供借鉴。After the reconstruction of 6 kV system in Weicun pumping station,the high voltage synchronous motor pump unit could not be started.Through cause analysis and troubleshooting,it is found that the trigger sequence of thyristor in excitation device is incorrect.The on and off conditions of thyristor element are introduced.Through the waveform diagram of three-phase AC power supply and three-phase bridge rectifier circuit,the conditions that the three-phase bridge rectifier circuit must meet to output controllable DC current are analyzed.The troubleshooting method is proposed,which can provide reference for the synchronization(phasing)problem of three-phase bridge controllable rectifier circuit.

关 键 词：同步电机 励磁装置 触发 同步(定相) 

分 类 号：TM307[电气工程—电机]