330 MW发电机定子3次谐波接地信号频发的原因及故障消除  

Causes of Frequent Occurrence of Stator Third Harmonic Grounding Signal of 330 MW Generator and Its Fault Elimination

作　　者：姜海涛 孙春明 王泽朋 闫鹏寿 王继东 JIANG Haitao;SUN Chunming;WANG Zepeng;YAN Pengshou;WANG Jidong(Gansu Power Investment Jinchang Power Generation Co.,Ltd.,Jinchang 737202,China)

机构地区：[1]甘肃电投金昌发电有限责任公司,甘肃金昌737202

出　　处：《通信电源技术》2023年第2期246-248,共3页Telecom Power Technology

摘　　要：针对某电厂330 MW发电机定子3次谐波接地信号频繁报警,根据现场对发电机一次回路检查,发电机保护说明书内容及保护定值进行查阅,通过定子3次谐波接地信号发出前后的数据分析和现场检查综合判断,利用机组停运机会查明了发电机定子3次谐波接地信号频发的原因,确保发电机出现问题的概率大幅度减少,保证了机组的稳定运行。In view of the frequent alarm of the third harmonic grounding signal of the 330 MW generator stator in a power plant,according to the on-site inspection of the generator primary circuit,the contents of the generator protection manual and the protection settings,through the data analysis before and after the sending of the third harmonic grounding signal of the stator and the comprehensive judgment of the on-site inspection,the reason for the frequent occurrence of the third harmonic grounding signal of the generator stator was found out by using the opportunity of unit shutdown,The probability of generator problems is greatly reduced,and the stable operation of the unit is ensured.

关 键 词：发电机 定子接地 3次谐波 故障消除 

分 类 号：TM31[电气工程—电机]