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

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.