A method and system for evaluating relay protection setting based on graph signal processing

Abstract

The application discloses a kind of relay protection setting value evaluation method and system based on graph signal processing, obtain the protection setting value of power grid protection and short-circuit current calculation result, and construct sensitivity graph signal based on cooperation relationship;Sensitivity graph signal is carried out graph Fourier transform calculation, and the eigenvalue and GFT coefficient of sensitivity graph signal are obtained;Relay protection setting value is diagnosed and evaluated based on the distribution characteristics of eigenvalue and GFT coefficient.This scheme constructs the protection sensitivity graph signal based on cooperation relationship, and the sensitivity change condition felt by fault branch and adjacent each branch is analyzed by the distribution characteristics of eigenvalue and GFT transform coefficient using graph Fourier transform method, so as to accurately analyze and identify the weak link of power grid relay protection setting value, with high accuracy and practicality.

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