Method of Power Grid Fault Diagnosis Using Intuitionistic Fuzzy Petri Nets with Inhibitor Arcs

Aiming at the uncertainty of information in power grid fault diagnosis and meeting the requirements of real-time online fault diagnosis, A method of power grid fault diagnosis using intuitionistic fuzzy Petri Nets with inhibitor arcs is proposed, in which the effect of inhibitor arcs to the relay protection configuration is considered, and intuitionistic fuzzy logic is employed to deal with the uncertain alarm messages/information. Firstly, according to the topology analysis of power grid and relay protection configuration setting rules, the Petri Nets with inhibitor arcs is used to reflect the protection logic relationship on the model structure. Then, the intuitionistic fuzzy set is taken into account to handle the complex fault data situation of certain information and uncertain information. Finally, the results of testing cases using the IEEE-39 node system show that this method can effectively deal with the mis-operation of multiple circuit breakers in complex data environment and accurately diagnose complex faults of power grid under uncertain information.