Multi-dimensional parameter assessment method of aging degree of running composite insulator

Abstract

The invention provides a multi-dimensional parameter assessment method of an aging degree of a running composite insulator. The method comprises the following steps: firstly measuring hardness, hydrophobicity, a surface defect area, an infrared absorption peak corresponding to a Si-O-Si group, a trap charge amount and a flashover voltage of a high-temperature vulcanized silicone rubber test sample of an umbrella skirt of a target composite insulator; then performing quantitative processing on the measured data, and scoring the aging degrees of the processed feature parameters; performing weighted summation on the scores of the feature parameters to obtain a comprehensive feature parameter characterizing the aging degree of the composite insulator; and finally determining the aging degree of the insulator according to a corresponding relation between the size of the comprehensive feature parameter and the grade of the aging degree. According to the multi-dimensional parameter assessment method provided by the invention, the microscopic electrical characteristics and microscopic physical and chemical characteristics of the umbrella skirt material of the composite insulator are combined with macroscopic characteristics to realize the comprehensive assessment of the aging degree of the composite insulator. By adoption of the method, the one-sidedness of the traditional assessment method is avoided, and thus the accuracy of an assessment result is guaranteed.

Description

technical field [0001] The invention relates to a method capable of accurately evaluating the aging degree of a composite insulator in operation, and belongs to the technical field of insulators. Background technique [0002] At present, most of the poles and towers of high-voltage transmission lines are insulated from the lines by composite insulators, and the shed and sheath of composite insulators are generally made of high-temperature vulcanized silicone rubber. During the long-term hanging network operation, high-temperature vulcanized silicone rubber is affected by high-intensity electric fields and light, heat, rain, pollution, etc. in the environment, and serious aging problems will occur. In order to ensure the reliable operation of high-voltage transmission lines, it is necessary to detect the aging degree of composite insulators. [0003] There are many methods for detecting the aging degree of silicone rubber composite insulators, such as analyzing the aging deg...

AI Technical Summary

Problems solved by technology

Most of these methods are evaluated based on a single aging index, resulting in a certain one-sidedness in the evaluation results.

For example, the invention patent with application number 201210386969.8 discloses a method for evaluating the operating state of composite insulators, which uses the test results of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and thermal stimulation current measurement (TSC) Evaluate the composite insulator from a microscopic point of view, and optimize the weight of each parameter based on the BP neural network algorithm, and finally calculate the operating state of the composite insulator, but it does not consider the influence of the macroscopic properties of the material on the aging state

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