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Prediction method for ageing state of composite insulator

A technology of composite insulators and aging state, applied in the field of voltage and insulation, to achieve good evaluation results and small prediction value errors

Inactive Publication Date: 2016-07-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the results obtained by this test method cannot be directly applied to predict the future aging trend of operating composite insulators

Method used

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  • Prediction method for ageing state of composite insulator
  • Prediction method for ageing state of composite insulator
  • Prediction method for ageing state of composite insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] A number of composite insulator samples under different environmental factors and time factors were selected, and the sample information is shown in Table 3:

[0060] table 3

[0061]

[0062]

[0063] According to the prediction formula, the predicted value Q of the trap charge of the multiple composite insulator samples is obtained tsc , and test the measured value Q of the sample trap charge, as shown in Table 4, the error is within 16%, which has a good prediction effect.

[0064] Table 4

[0065]

[0066] Prediction of value Q according to the amount of trap charge tsc Determine the aging grade of the sample to be tested, and predict the aging trend of the composite insulator over time from the graph of the trapped charge and the service life obtained in the interface of the composite insulator aging state evaluation system.

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Abstract

The invention relates to a prediction method for the ageing state of a composite insulator.The prediction method includes the steps that a multi-dimensional prediction model, about environment elements (the contamination degree, humidity and ultraviolet intensity) and operation years, of trap parameters (trap charge quantity) is set up, trap charge quantities of multiple samples are tested, equivalent time of each environment element is calculated according to operation environment and operation years of the composite insulator to determine a prediction formula, and the influence factor of the environment elements to ageing of the composite insulator is obtained.The relation between the trap parameters of space charges of a silicone rubber material of the composite insulator and the elements such as the operation time and the operation environment is determined, and the ageing trend of the operating composite insulator along with the operation time in the complex environment elements can be predicted accurately.It can be known by comparing with actual test values that the prediction value error is small and is within 16%, and a good evaluation effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of voltage and insulation, and in particular relates to a method for predicting the aging state of a composite insulator. Background technique [0002] The statistical results show that the degradation of the insulation performance of composite insulators is mostly caused by the aging of silicone rubber materials. The aging of silicone rubber material itself is a microscopic change process, so it is often impossible to accurately describe its aging process and state by using macroscopic electrical and mechanical characteristic test methods, let alone predict its future aging trend. [0003] Thermally stimulated current (TSC) is a relatively advanced method for studying the aging state of composite insulators. This method can obtain the space charge trap parameters of the silicone rubber material of the composite insulator in operation. However, the results obtained by this test method cannot be directly app...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04
CPCG06F30/20G06F2119/04G06Q10/04
Inventor 屠幼萍王璁王景春梁栋李天福姜艺楠龚博
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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