Method for locating fault area of power grid based on multi-dimensional information
A technology for grid fault and regional location, applied in the direction of fault location, etc., can solve the problems of measurement point error, topology change, synchronous timing, etc., to achieve fast and accurate location, reduce the sampling frequency requirements, good robustness and universal The effect of suitability
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[0037] The present invention will be further explained below in conjunction with the drawings.
[0038] Such as figure 1 As shown, a method for locating a grid fault area based on multi-dimensional information of the present invention includes the following steps:
[0039] (1) First, the multi-dimensional feature quantities of n measuring points are expressed in the form of a matrix, as follows:
[0040]
[0041] Among them, n represents the number of samples, s represents the dimension of the fault feature quantity; then x sn Represents the value corresponding to the s-th dimension feature quantity of the n-th sample;
[0042] (2) Normalize the initial data, and the normalized multi-dimensional fault feature matrix X′ is:
[0043]
[0044] (3) Given the classification number c=4 of the optimized cluster analysis, set the iterative stop target threshold ε=10 -5 , Give the initial cluster center P (t) , Set the initial iteration value t = 0;
[0045] (4) Fuzzy membership based on optimiz...
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