The excitation system is an important component of synchronous generator whose security is essential for the normal operation of the generator. According to an analysis of excitation system accidents occurring in a large power plant

it is noted that for lack of rules to go by for excitation transformer protection configuration

current protection schemes are not able to respond quickly to the main circuit fault of generator static excitation system. Therefore

a fast protection scheme for generator static excitation system is put forward

and the protection setting method and installation location are given on the basis of simulation. The protection scheme is able to quickly respond to the excitation system failure to avoid serious damage to the system and its principle is simple and easily applied.