Method for diagnosing defects of intelligent substation secondary system based on multi-parameter information fusion

Abstract

The invention discloses a method for diagnosing defects of an intelligent substation secondary system based on multi-parameter information fusion. The method comprises the following steps of: 1) establishing an information fusion model for diagnosing the defects of the secondary equipment; 2) establishing an expert database for diagnosing and analyzing the defects of the secondary equipment; 3) collecting original data information of the secondary equipment; 4) performing information fusion; and 5) outputting a diagnosing result. According to the method disclosed by the invention, on the basis of reference to the existing information fusion method, according to the collected reference data and electric power test data, a self-adaptive algorithm is utilized to optimize a network and information induction-deduction technique; the defects of the electric secondary equipment are comprehensively diagnosed; the relation network is constructed by dividing the defect characteristic parameters according to the logic relation between different defect characteristic information; the defect reasons of the secondary equipment can be reflected from different sides; the elementary probability distribution assignment for an evidence is improved according to the output of uncertain reasoning of the evidence; the reliability of the evidence for recognizing single disabled mode is fully reflected.

Description

technical field [0001] The invention relates to a substation fault diagnosis method, in particular to a fault diagnosis method for a secondary system of an intelligent substation based on multi-parameter information fusion, and belongs to the technical field of substation fault analysis. Background technique [0002] The secondary system of an intelligent substation is an important component of power system measurement, protection, and monitoring. A well-run secondary system is crucial to the entire power grid. The reliability requirements of the secondary system of the power system are not only reflected in ensuring the normal power consumption of users and prolonging the service life of equipment, but also ensuring the safe and effective economic operation of the power grid and improving work efficiency. [0003] In the traditional substation, because the secondary system is hard-wired, there is a corresponding logical real circuit, and there is a one-to-one correspondence...

AI Technical Summary

Problems solved by technology

[0004] Due to the diversity and uncertainty of defects in the secondary system of smart substations, there are complex connections between various defects, which makes the defect diagnosis process more complicated, and a single diagnosis method is difficult to meet the needs

Images