静态励磁引起的发电机轴电压成分辨析  

Identifying and Analyzing the Component of Generator Shaft Voltage Caused by Static Excitation

作　　者：张李军 周平 刘基涛 伏翥 ZHANG Lijun;ZHOU Ping;LIU Jitao;FU Zhu(Dongfang Electric Autocontrol Engineering Co.,Ltd,Deyang 618000,China)

机构地区：[1]东方电气自动控制工程有限公司

出　　处：《大电机技术》2020年第1期16-20,25,共6页Large Electric Machine and Hydraulic Turbine

摘　　要：发电机轴电压有多个可能的影响因素,静态励磁是其中之一。本文介绍了用以分析静态励磁对发电机轴电压在低频和高频两方面造成影响的模型电路,结合在大型汽轮发电机上的轴电压实测录波曲线,强调了静态励磁引起的发电机轴电压成分的波形特征,有助于正确分析轴电压的确实来源。理论分析和测试结果都证明了采取适当的措施可以消除静态励磁对轴电压的影响。本文还简单总结了防止轴电压危害的监视措施及其局限性。This paper introduces the model circuit for analyzing the influence of static excitation on the shaft voltage of generator in low frequency and high frequency.Combining with the measured waveform of shaft voltage on large turbo-generator,the waveform characteristics of the component of the generator shaft voltage caused by static excitation are emphasized in order to help analyzing the exact source of the shaft voltage correctly.Theoretical analysis and test results show that appropriate measures can be taken to eliminate the influence of static excitation on the shaft voltage.This paper also briefly summaries the monitoring means to avoid possible harm of shaft voltage and its limitations.

关 键 词：汽轮发电机 静态励磁 轴电压 轴电流 测量 

分 类 号：TM311[电气工程—电机]