Power distribution network fault diagnosis system and method based on multi-source information

Abstract

The invention discloses a power distribution network fault diagnosis system and method based on multi-source information. The system comprises a data collection layer, a knowledge representation layer and a fault diagnosis layer, wherein the data collection layer collects fault warning information in each power distribution substation and provides the collected information for the knowledge representation layer in time sequence; the knowledge representation layer describes and buffers data of all kinds of data sources of the information and provides all kinds of heterogeneous data for the fault diagnosis layer in a unified data view mode; the fault diagnosis layer makes different diagnosis methods according to the different data sources, a fault result is comprehensively judged finally, and the diagnosis result is used for analysis after an accident. The utilization rate of the fault information is improved, the reliability of the fault diagnosis is ensured, the fault reason, the fault influence degree and the like are analyzed preliminarily after a fault happens, the analysis result can assist operating personnel in building a timely and effective power distribution network fault repairing strategy, and the power supply reliability of a power distribution network is improved.

Description

technical field [0001] The invention relates to the field of electric power distribution network, in particular to a system and method for automatic fault diagnosis of distribution network based on multi-source information. Background technique [0002] The distribution network has many types of electrical equipment, short lines, many branch lines, complex types of switchgear equipment, rough manufacturing process of some early switchgear, poor quality and performance, and its protection and control automation is far inferior to that of the transmission network. The probability of its failure is much greater than that of the transmission network, which affects the improvement of the reliability of the power supply of the power grid. [0003] At present, the main problems faced in the fault diagnosis of distribution network are: [0004] (1) Distribution network fault diagnosis mainly relies on the circuit breaker and switch displacement information provided by distribution ...

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Problems solved by technology

[0004] (1) Distribution network fault diagnosis mainly relies on the circuit breaker and switch displacement information provided by distribution automation for simple fault location, but the overall coverage of existing distribution automation terminals is low, accounting for only 1% of all distribution equipment sites 8.4%, the information interaction between the master station of the original distribution automation system and other systems adopts a point-to-point method, and there are often cases where information collection is not in place, which seriously restricts the development of distribution network fault diagnosis

[0005] (2) So far, the fault diagnosis of the distribution network has mainly focused on the research of manual fault location, single-phase ground fault fault line selection, fault isolation and power supply restoration, and has not yet been able to use the distribution transformer call test of the distribution network. Data, 95598 manual platform, FTU alarm information, distribution network topology and other multi-source information for in-depth research on fault diagnosis, and there is no complete system of distribution network fault diagnosis analysis theory

[0006] In addition, the current accident analysis after the fault of the distribution network needs to manually go through the accident site investigation and statistical analysis to give the corresponding results, which prolongs the power supply recovery time and is very detrimental to improving the reliability of power supply

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