A power cable condition evaluation method based on momentum BP neural network

Abstract

The invention relates to a power cable state evaluation method based on momentum BP neural network, which comprises the following steps: momentum BP neural network with momentum factor is established;the neural network is trained by collecting multi-group data of power cable state index, the weight of the neural network is adjusted gradually by output value, target value, weight change and momentum factor of the neural network, so that the error between output value and target value is minimized globally, after the training, the power cable state index data to be evaluated is inputted to themomentum BP neural network, and the running state of the power cable is judged. Momentum BP neural network has fast convergence and minimal global error. The method can quickly and accurately establish the mapping relationship between power cable status index data and evaluation conclusion, evaluate power cable status comprehensively and accurately, and provide scientific basis for cable operationand condition-based maintenance.

Description

technical field [0001] The invention relates to a power cable state evaluation method, in particular to a power cable state evaluation method based on a momentum BP neural network, which belongs to the technical field of power equipment diagnosis. Background technique [0002] With the improvement of urban construction's requirements for the reliability and aesthetics of power grid power supply, cables have been used more and more, and the cable rate of lines has become an important criterion for measuring the level of power grid construction in a city. However, cables are generally buried deep underground. During long-term operation, irreversible damage and defects will be caused due to external force, moisture, corrosion, aging and other reasons. Potential failures may occur, threatening the safety and quality of power supply. [0003] At present, the evaluation of the operating status of domestic power cables mainly relies on testing methods such as insulation resistance...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of a single basis for evaluating the state of power cables at present. The existing evaluation methods can only evaluate whether there is a defect in a certain aspect or part of the cable, and there is a lack of a method that can integrate various test data and parameters of the cable. , a method for comprehensively analyzing the operating state of the cable, the present invention provides a method for evaluating the state of the power cable, which can analyze a variety of given operating data of the power cable, accurately evaluate the operating state of the power cable, and provide a basis for condition-based maintenance

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