Partition Of The Power System Fault Nature Based On Extension

In power system operation, transmission lines most prone to fault. Solvingsecurity problem generally use the technology of automatic reclosing, Automaticreclosing device can not correctly partition the nature between transient fault andpermanent fault. When a permanent fault, action of the automatic reclosing devicecauses harm to the power system. Extension provide an effective tool to correctlypartition the nature of transient fault and permanent fault, reduce the number ofreclosing, and to improve stability.This paper presents three element models,that is not fully reflect the nature ofthings from the general model, Fully reflect the nature of things based on the entiremodel and things can be resolved conflicting Extension element model. Improved thedependent function, and partition the power system fault nature. Simulation resultsshow that partition of the power system fault nature based on the whole elementmodeling is more accurate than that based on the Fuzzy mathematical method;Partition of the power system fault nature based on the extension transformation frommodel achieve the desired results, can resolve the contradictions that can not partitionthe power system fault nature accuratelyIn the partition of the power system fault nature question, the method based onExtension is feasible and advantage as compared to Fuzzy mathematicalmethod; Carrying on the extension transformation to the model can resolve theproblem of fault nature partition. the result is also ideal.