The Study Of The Fault Analysis System Of The Power Grid Based On The Fault Record

The establishment of the fault recorder information network enables theconcentration analysis of the fault record data. it is necessary to develop anew fault diagnosis system and a instant system for evaluation of the relayprotection based on the fault record data. This article introduces some filteringmethods and offers the suitable methods for the use of filtering the fault recorddata. The author raises a concept of the relay protection reappearance andanalyses the system structure and its function. Following this, the authorsummarizes the modules of the typical protection devices and studies theprinciple and method to diagnose the fault sector by reappearing the protection.In the end, the author discusses the method to evaluate the action of theprotection devices by virtue of the protection reappearance and the actioninformation gained from the SCADA system.