Analysis of tripping accident of 500kV circuit breaker in a power plant

Through a 500kV circuit breaker fault tripping accident was analyzed, and the entire fault development process was analyzed by protecting the trip loop, the DC power supply loop inspection, and the secondary equipment situation such as fault recording and protection action, and the cause of the fault was determined. In order to prevent similar accidents from happening again, it is proposed technical measures to set the signal with excessive voltage deviation to the background and telekinesis.