双端注入式转子接地保护在无刷励磁发电机中的运用  

Study on rotor one point to ground fault protection for brushless exciting generator

作　　者：王佼[1] 徐岩[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《黑龙江电力》2011年第6期463-466,共4页Heilongjiang Electric Power

摘　　要：无刷励磁发电机通常采用单端注入式原理构成转子一点接地保护,针对该保护无法计算接地故障位置的问题,介绍了双端注入式转子接地保护原理、接地电阻计算方法和保护动作判据,并采用Matlab/Simulink软件构建转子一点接地故障仿真模型。仿真试验结果表明,双端注入式原理能够满足无刷励磁发电机实际运行需要的精度和灵敏度。In view of the problem of current one end voltage injection type of rotor ground fault protection used in brushless exciting generator, this paper advances changing the terminal lead of generator rotor by brush lifting device and using the principle of two ends voltage injection type to build one - point ground protection. This paper analyzes the principle of two ends voltage injection type rotor ground fault protection and what the emulation experiment based on Matlab/Simulink software manifest is that the scheme can satisfy the needs of preciseness and delicacy for brushless exciting generator.

关 键 词：无刷励磁 一点接地保护 举刷装置 励磁电压 仿真 

分 类 号：TM341[电气工程—电机]