Abstract

Power system fault diagnosis is an important means to ensure the safe andstable operation of power system. According to the specific situation ofChina’s current power grid automation level, a hierarchical fault diagnosismethod based on switch trip signal, protection information and fault record-ing information is proposed. This method can not only diagnose simple faultand complex fault, but also judge fault type and phase, and complete faultlocation, which provides reliable guarantee for operators to quickly removefault and resume operation. The diagnosis method based on this principle hasgood application effect in simulation test.

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