A CAUSE EFFECT MODEL FOR POWER SYSTEM FAULT DIAGNOSIS

Since expert system technology has an edge over the conventional methods in a particular domain of problems confronted at Energy Management Systemsa is evident from more than 200 research papers, exploring the feasibility of such applications. The major premises for this research work is identified as developing an expert system for fault diagnosis with model based reasoning approach which can cater to realistic power systems and accommodate all possible complexities. The fault diagnosis model includes a sample of existing protection schemes along with their respective relay codes with PLC signals. This model entails all substation structures like one - and - half breaker ring bus, etc. Based on operation of relays and circuit breakers the system reasons out the faulted section along with the undesirable operation of protective elements. The developed expert system is tested on a 24 bus sample power system which demonstrated favorable results.