An air gap discharge voltage great reduction prediction method

Abstract

An air gap discharge voltage great reduction prediction method comprises the following steps: S1, selecting a training sample: selecting atmospheric condition parameters and corresponding air gap discharge voltage, the atmospheric condition parameters comprising air pressure, temperature, wind speed, relative humidity and illumination; S2, network training: taking the air pressure, the temperature, the wind speed, the relative humidity and the illumination in the training sample in the step S1 as input, taking the marked air gap discharge voltage as output, constructing a four-layer BP neuralnetwork, and training the network; And S3, air gap discharge voltage prediction: inputting air pressure, temperature, wind speed, relative humidity and illumination collected in real time and respective variations into the network trained in the step S2, so as to predict whether the air gap discharge voltage is greatly reduced or not. According to the prediction method, reference can be provided for operation and maintenance personnel, and targeted protection is carried out on the external insulation of the electric power system to reduce flashover accidents.

Description

Technical field [0001] The present invention relates to the technical field of on-line monitoring of electrical equipment, and more specifically, to a method for predicting a large decrease in air gap discharge voltage. Background technique [0002] The discharge characteristic of the air gap is an important basis for the external insulation design of high-voltage transmission and transformation. According to the discharge theory, the discharge voltage of the air gap is affected by atmospheric conditions (air pressure, temperature, humidity, etc.). [0003] In view of the influence of atmospheric conditions on the discharge voltage, a large number of experimental studies have been carried out at home and abroad, but they mainly focus on the prediction of the discharge voltage, and the research on the substantial reduction of the discharge voltage is relatively lacking. Summary of the invention [0004] In order to overcome at least one defect in the prior art, the present invention...

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Problems solved by technology

[0003] In view of the influence of atmospheric condition parameters on the discharge voltage, a large number of experimental studies have been carried out at home and abroad, but they mainly focus on the prediction of the discharge voltage, and there is relatively little research on the significant reduction of the discharge voltage.

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