关于发电机转子接地保护几个问题的探讨

Study on Issues of Generator Rotor Earth Fault Protection

分析了轴电压吸收回路以及接地碳刷与大轴间接触电阻对发电机转子接地保护的影响,并分别提出了相应的对策和注意事项。可通过延长电子开关切换周期或方波电源周期消除轴电压吸收回路的影响,应保持接地碳刷与转子大轴间接触良好。探讨了旋转励磁机组转子接地保护的构成方式,建议采用定期检测方式。

This paper analyzes the influences of shaft voltage absorbing circuit and brush touching of generator rotor earth fault protection. Some countermeasures and advices are presented resistance on the performance Prolonging period of electric switches and injected square voltage is suggested to eliminate the influence of shaft voltage. It is necessary for rotor earth fault protection to keep good-touching of grounding brush and rotor shaft. Rotor earth fault protection configuration of revolving excitation generator is investigated subsequently, and periodical detecting mode is commended.