This paper presents an intelligent alarm processing system based respectively on network configuration model and Petri nets model. By analyzing breaker tripping messages, this alarm processing system can identify fault component or possible fault area, and by considering both relay actuating and breaker tripping messages, it can identify the determined fault component, and if needed, the malfunctioning breaker or malfunctioning relay. This alarm processing system will be implemented on East China Power System to serve as an assistant tool for the operators to take correct and swift actions during emergency conditions.
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