励磁变低压侧单相接地引起的转子接地保护动作分析及故障排查

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英文篇名：Action Analysis and Troubleshooting of Rotor Ground Protection Caused by Single-phase Grounding at Excitation Variable Low Voltage Side 作者：薛丽丽 ; 刘森林 英文作者：XUE Lili;LIU Senlin;Yalong River Hydropower Development Co.,Ltd.;Sichuan Vocational Institute of Management; 关键词：发电机 ; 转子一点接地 ; 动作分析 ; 故障排查 英文关键词：generator;;rotor one-point grounding;;action analysis;;troubleshooting 中文刊名：NCSD 英文刊名：China Water Power & Electrification 机构：雅砻江流域水电开发有限公司;四川管理职业学院; 出版日期：2019-01-15 出版单位：中国水能及电气化 年：2019 期：No.166 语种：中文; 页：NCSD201901007 页数：3 CN：01 ISSN：11-5543/TK 分类号：33-35

摘要

近年来,发电机容量不断增大,转子作为发电机十分重要的旋转部件,其承受的力矩也越来越大,要求也越来越高,且转子在高速旋转中易发生一点接地,故大部分发电机均配置了转子一点接地保护。文章对励磁变低压侧单相接地引起的转子接地保护动作进行了分析,为同行故障排查提供参考。
        The capacity of the generator has been increasing,and the rotor,as an important rotating part of the generator,bears more and more torque,and more and more demands are proposed in recent years. In addition,the rotor is prone to one-point grounding in high-speed rotation. Therefore,most generators are equipped with rotor one-point ground protection.The rotor ground protection action caused by single phase grounding on excitation variable low voltage side is analyzed in the paper,which provides reference for peer troubleshooting.

引文

[1]王维俭.电气主设备继电保护原理与应用[M]. 2版.北京:中国电力出版社,2001:214.
    [2]陈俊,王均帆,严伟,等.励磁变压器低压侧单相接地故障在线识别方法[J].电力自动化设备,2014,11(34):149-152.
    [3]李翔,韩浩,赵强.发电机大轴接地碳刷引起跳机事故的分析和处理[J].东北电力技术,2005(6):36-37.