负序电压对主变微机保护装置应用的影响

Effects of negative sequence voltage on application of microprocessor protectors for main transformers

通过对一起主变压器微机继电保护装置误动作的分析,阐述了负序电压对主变压器微机型纵差保护装置和复合电压过电流保护装置的影响,并对主变压器微机保护装置应用中存在的问题进行了深入探讨,提出了应对措施。

Based on analysis on a misoperation of microprocessor based relay protectors for main transformers, the effects of negative sequence voltage on microprocessor based longitudinal differential protec- tion and complex voltage overcurrent protection of main transformers were elaborated. Problems existing in the application of microprocessor protectors for main transformers were discussed thoroughly, and counter- measures were put forward.