电厂辅机控制接线错误引起的故障分析  

Power plant auxiliary control wiring error caused by the failure analysis

作　　者：王爱明 

机构地区：[1]湖北华电江陵发电有限公司,湖北荆州434100

出　　处：《华电技术》2017年第1期58-60,共3页HUADIAN TECHNOLOGY

摘　　要：在火力发电厂辅助系统中,380 V电源回路的控制电源一般采用380 V/220 V隔离变压器来提供。隔离变压器的一次侧接至马达控制中心的母线上,隔离变压二次侧通过隔离开关为控制回路提供电源。辅助系统中功能相同的2台电机一般都互有联锁,不同电机控制回路的隔离变压器二次侧火线在接线端子上距离很近,如果隔离变压器一次侧或二次侧接线不一致,将会导致不同电机控制电源火线间存在电压差,当两火线误碰时会造成2台电机同时跳闸。In the thermal power plant auxiliary system,380 V power supply circuit of control power generally use 380 V /380 V isolation transformer to provide. The isolation transformer primary side connected to the motor control center( MCC) on the bus,isolation transformer secondary side by isolating switch power supply for control circuit. Auxiliary system function in the same 2 motors are generally interlock with each other,different motor control circuit of isolation transformer secondary side wire on the terminals are close,if the isolation transformer primary side and secondary side connection is not consistent,will lead to different voltage difference between motor control power supply wire,when two wire mistake touch two motor trip at the same time.

关 键 词：火电厂 辅助系统 控制接线 故障分析 

分 类 号：TM621[电气工程—电力系统及自动化]