发电机裂相横差保护报警分析与处理  

Analysis and Treatment of Generator Split-Phase Transverse Differential Protection Alarm

作　　者：陈熙平 张杰 张强 CHEN Xi-ping;ZHANG Jie;ZHANG Qiang(Yalong River Hydropower Development Co.,Ltd,Chengdu 610056,China)

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610056

出　　处：《电工电气》2020年第12期39-42,共4页Electrotechnics Electric

摘　　要：介绍了发电机裂相横差保护报警现场检查方法,分析了裂相横差保护报警原因,确认报警原因为发电机中性点电流互感器(CT)故障。对CT故障原因进行分析可知,是运行环境温度长期过高,CT绝缘等级不够,且设备本身存在质量问题等因素造成。对该故障提出了现场改善措施,运行实践表明,该改善措施效果明显。This paper introduces the on-site inspection method of the generator split-phase transverse differential protection alarm,analyzes the cause of the alarm,and confirms that the cause of the alarm is the generator neutral current transformer(CT)fault.By analyzing the causes of CT fault,the operating environment temperature is too high for a long time,the CT insulation class is low,and the equipment itself has quality problems.The field improvement measures are put forward for the fault,and the operation practice shows that the improvement measures are effective.

关 键 词：中性点电流互感器(CT) 裂相横差 保护报警 故障 

分 类 号：TM312[电气工程—电机] TM452