低频电压注入式励磁回路接地保护应用问题的研究  

Research on Several Field Circuit Ground Protections with Low Frequency Voltage Injection

作　　者：张侃君[1] 胡刚[1] 董永德[1] 夏勇军[1] 

机构地区：[1]湖北省电力试验研究院,武汉430077

出　　处：《湖北电力》2009年第3期40-43,共4页Hubei Electric Power

摘　　要：文章对国内目前已经投入运行的三种低频电压注入式励磁回路接地保护进行介绍。并对保护的原理、计算方法、计算误差、硬件电路以及保护的一些应用问题进行了分析。此外,根据保护在特大型水轮发电机组中的运行情况,对三种保护的优缺点进行了比较。In the paper,three field circuit ground protections with low frequency voltage injection which have been used are introduced. The protection principle, calculation method, calculation error, hardware circuit and some application problems are analyzed. Furthermore, the merits and defects of these protections are compared based on the protection＇s operating condition in huge hydro-generator.

关 键 词：发电机 励磁回路接地保护 低频电压注入式 接地电阻 

分 类 号：TM774[电气工程—电力系统及自动化]