Circuit breaker operation characteristics analysis method using IED of digital substation

摘要

The present invention relates to a method for analyzing the operating characteristics of a circuit breaker using an intelligent electronic device (IED) of a digital substation, Acquiring the excitation timing data of the trip coil in the breaker, acquiring the change timing data of the contact a in the breaker, acquiring the excitation timing data of the closing coil in the breaker, when the phase current flowing through the breaker is 0 acquiring data, measuring the opening time when the circuit breaker is opened, measuring the breaking time when the circuit breaker is opened, measuring the value of the coil current when the circuit breaker is opened, the closing time when the circuit breaker is closed It may include the steps of measuring, diagnosing whether the data measured in each step is within a normal range, and generating an alarm when any one of the diagnostic results is out of the normal range. According to the present invention, it is possible to analyze the operation characteristics of a circuit breaker without installing a separate circuit breaker operation characteristic analysis device by using the data in the IED of the digital substation.