采用动态测量技术实现转子一点接地保护

Realizing rotor grounding protection by adopting dynamic measurement

对传统外加直流电源的转子一点接地保护方案进行分析,发现该方案有明显的缺点。缺点主要有:保护灵敏度低、保护死区大、无法根据接地故障电阻值动作、无励磁状态下并无实际保护作用。通过理论分析,结合采用计算机自动控制技术,提出采用动态测量技术实现转子一点接地保护的方案,可以较好地解决传统外加直流电源的转子一点接地保护方案中的问题,更好地实现转子一点接地保护。

Through the analysis of traditional rotor grounding protection with adscititious DC source, this paper finds out that the scheme had obviously defects, such as： low sensitivity, exsiting large invalid area, no protection in no excitation state. A new scheme with dynamic measurement method is proposed to complete rotor grounding protection, it can solve the default which exists in traditional scheme.