一起热电厂三相电流不平衡现象调查分析  

Investigation and Analysis of a Three Phase Current Unbalance Phenomenon in Thermal Power Plant

作　　者：金百荣[1] 李电[1] 

机构地区：[1]绍兴电力局,浙江绍兴312000

出　　处：《电力电容器与无功补偿》2012年第1期73-77,共5页Power Capacitor & Reactive Power Compensation

摘　　要：介绍了一起热电厂因线路割接后频繁出现三相电流不平衡现象,并根据电能质量在线监测系统历史数据,确认异常原因为上级电网电气化铁道负荷产生的负序电流引起,显示出电铁负荷造成的负序电流污染影响范围十分深远,发电机对系统负序电压十分敏感。A three phase current unbalance phenomenon after replacement of power line in a thermal power plant is introduced. Based on the historical data of on-line power quality monitoring system, it is confirmed that the abnormal phenomenon is caused by the negative sequence current produced by electric railway load from upper power grid; it is shown that the pollution influence of negative sequence current produced by electric railway load is very wide, and the generator is very sensitive to negative sequence voltage.

关 键 词：发电机 电气化铁道 负序电流 三相电流不平衡 

分 类 号：TM727.3[电气工程—电力系统及自动化]