Partition of the power system fault nature based on extension

Extension provide an effective tool to correctly partition the nature of transient fault and permanent fault, reduce the number of reclosing and to improve stability. This paper presents three element models, that is not fully reflect the nature of things from the general model. Fully reflect the nature of things based on the entire model and things can be resolved conflicting extension element model. Improved the dependent function, and partition the power system fault nature. Simulation results show that partition of the power system fault nature based on the whole element modeling is more accurate than that based on the fuzzy mathematical method; Partition of the power system fault nature based on the extension transformation from model achieve the desired results, can resolve the contradictions that can not partition the power system fault nature accurately.