220kV高频保护拒动事件调查

The investigation of the resist - operation in 220kV high frequency protection

结合某次220kV高频保护动作跳闸的录波图，分析了导致高频保护拒动的技术原因，以及在录波图上和装置上的特殊表现方式，提出了完善的整改措施，旨在引起继电保护人员对高频通道反措工作的重视。

Combining with the recorded diagram in certain 220kV high frequency protection tripping, the paper analyzes the technical reason leading to the high frequency protection resist -operation and the special performance in the recorded diagram and device. Besides, the paper presented perfect improvement measure in order to bringing about the attention of the relay protection staff to the accident preventive measure in high frequency channel.