An Implementation Method for Power System Fault Diagnosis Expert System

During a power system fault, a great deal of unprocessed alarm messages is generated by EMS or SCADA system. It is too difficult for the operator to cope with and it may cause misjudgment. An implementation method of fault diagnosis expert system by alarm messages relative to state change of circuit breakers is presented. The expert system has been developed. A concept of hierarchic fault diagnosis by protection messages is put forward.