发电机励磁回路两点接地保护的研究

A study of the two-point grounding fault protection scheme for excitation winding of generator

针对目前发电机励磁回路两点接地保护不够成熟、死区过大的问题,利用目前使用广泛的发电机乒乓式励磁回路一点接地保护为基础进行拓展,提出了一套较为合理的两点接地保护方案,新的两点接地装置优点突出,简单可靠,具有较好的实际使用价值。

Aiming at the limitation of two-point grounding protection and based on the Ping Pong type grounding protection, this paper puts forward a one-point-to-ground protection scheme by integrating the self checking method of switches. A new and comprehensive two-point-ground protection scheme is proposed. This protection scheme is simple,stable,and practical.