Evaluation method for running state of power transmission line

Abstract

The invention discloses an evaluation method for the running state of a power transmission line. The method comprises that faults, emergency or severe defects and common and typical defect data over the years of parts in the power transmission line are arranged, parameters of the parts of the power transmission line are quantified, and a multidimensional matrix used for principle component analysis is constructed; key parameters of the parts in the power transmission line are determined; a Bayes network structure of the running state of the parts in the power transmission line is constructed, and the parts in the Bayes network structure include basic and protective facilities, towers, grounding wires, insulator chains, armor clamps, lightning-protection facilities, grounding devices and line protective zones; the state probabilities of the parts are calculated to construct a condition probability table; and defects of the parts of the power transmission line are evaluated. A mathematical model for evaluation parameters of different parts is established on the basis of the principle component analysis method, and the efficiency in obtaining evaluation indexes is improved.

Description

technical field [0001] The invention relates to the technical field of power system operation safety, and more specifically, relates to a method for evaluating the operation state of a transmission line. Background technique [0002] The overhead transmission line is the main artery of the power system, shouldering the heavy responsibility of transmitting electric energy, and is an important part of the power system. Since the overhead transmission line is put into operation, it must ensure its power transmission capacity as well as the level of safety and reliability of operation. The safe operation of the entire power system has brought different degrees of influence and threat. In this way, with the rapid growth of my country's electric power construction, the scale of the power network is increasing day by day, which puts forward higher requirements for the safe and stable operation, monitoring and protection of overhead transmission lines. [0003] At present, carryin...

AI Technical Summary

Problems solved by technology

[0004] However, the operation of high-voltage transmission lines presents the characteristics of wide distribution, harsh geographical environment and complex meteorological environment. The existing monitoring and evaluation mostly focus on the evaluation of a certain state (such as icing, pollution), lack of overall evaluation, evaluation The model is single, most of them are evaluation guidelines, there are few studies on intelligent algorithms, the evaluation parameters are not uniform, and the validity and redundancy of evaluation parameters are often ignored

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