发电机乒乓式转子接地保护电路设计

Circuitry design of ping-pong type grounding fault protection for generator rotor

基于有关文献中几种乒乓式发电机转子接地保护电路的分析,确定了一种较为合理的电路结构,并具体阐述了转子一点接地的检测原理。详细分析了保护电路中各主要环节的特征、电路实现要点及可供选择方案,提出了相关环节的具体实现电路和元件参数。通过对转子一点接地保护的灵敏度分析,证实了该设计的实用价值。

Based on the analysis of ping-pong type grounding fault protection for generator rotor,a more reasonable circuit structure is chosen,and its detecting principle of one-point grounding fault is expatiated. The characteristics of its main parts are analyzed,the outline of its design is explained and the applicable schemes are proposed. The real circuitries of some parts are given and the parameters of some electric elements are specified. The sensitivity of one-point grounding protection for rotor is analyzed,which validates the practical value of the design.