Fault-tolerant online fault location method for distribution network based on predictive correction technology

Abstract

The invention provides a distribution network fault tolerance on-line fault location method based on a prediction correction technology. The method comprises the steps that the independent region topology connection and the power flow transmission relation of a distribution network are used to establish a distribution network priority structure identification matrix; based on an independent region over-current information vector set and the distribution network priority structure identification matrix, a fault independent region decision matrix is constructed; fault independent region fault identification coefficients are determined, and a failed independent region is identified; the independent region is used as a basic dividing limit to establish a switch function model described by an algebra relation; prediction and correction models of fault region identification of the distribution network are constructed; and a prediction correction algorithm is used to identify a single feeder fault or a complicated multi-fault section of the distribution network. The method provided by the invention has the advantages of high information distortion fault tolerance ability, high versatility, high reliability, global convergence, convenient realization and high fault identification efficiency, and can effectively identify any complex multi-short circuit fault section of the distribution network.

Description

technical field [0001] The present invention relates to the technical field of electric power system intelligent distribution network, and more specifically, relates to a fault-tolerant online fault location method of distribution network based on predictive correction technology. Perform accurate online identification. Background technique [0002] The distribution network is directly connected to users, and its operation level directly affects the quality and reliability of power supply on the user side. Among them, the rapid and efficient identification of fault locations in the distribution network is an important technical measure to improve its operation level. Traditional fault location methods include manual line inspection, fault recording method, and complaint telephone method. The above methods have low fault location efficiency, and the accuracy of fault location needs to be further improved. [0003] With the improvement of distribution network automation and i...

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problems of low reliability and low identification efficiency of the distribution network fault location method, and provides a distribution network fault-tolerant online fault location method based on predictive correction technology, which not only has high fault tolerance, but is simple and convenient to implement and With good numerical calculation stability and reliability, it is suitable for online fault location of single fault or complex multiple faults in large-scale distribution network

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