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Evaluation method of aging degree of operational composite insulator

A composite insulator, aging degree technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problems of poor accuracy, not involving the volume resistivity characteristics of high-temperature vulcanized silicone rubber, etc., to achieve simple operation, improve accuracy, and ensure reliability. running effect

Inactive Publication Date: 2014-09-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, these methods cannot give quantitative discrimination results, and their accuracy is poor, and none of the existing detection methods involves the volume resistivity characteristics of high-temperature vulcanized silicone rubber, and the volume resistivity is the impact on the operation of high-voltage transmission lines The largest parameter is also the best indicator for judging the aging degree of high-temperature vulcanized silicone rubber, so it is necessary to explore a method for accurately evaluating the aging degree of composite insulators based on volume resistivity

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Embodiment Construction

[0030] The invention provides a method with simple operation, accurate detection and the ability to quantitatively judge the aging degree of composite insulators.

[0031] Concrete steps of the present invention are:

[0032] a. Sample collection: Use a special slicer to cut a disc-shaped sample on the surface of the composite insulator removed by hanging the net. The sample is a disc-shaped sample with a diameter of 20mm and a thickness of 1.3mm.

[0033] b. Clean the sample: Use absolute ethanol to clean the surface of the sample, and then use deionized water to clean the surface of the sample, and then put it in a drying oven and dry it at 303K for 24 hours.

[0034] c. Test sample: Aging test is carried out by using a self-made three-electrode volume resistivity test device. The volume resistivity device is specially designed for small samples after hanging net operation. The measuring element is placed in a temperature-adjusted shielding box as a whole. This shielding me...

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Abstract

An evaluation method of the aging degree of an operational composite insulator comprises the steps of firstly utilizing a three-electrode volume resistivity test device to measure the volume resistivity of a round-slice high-temperature silicon sulfide rubber sampler which is cut from the surface of the net-hanging operational composite insulator at different temperatures, plotting a curve, calculating the linear fitting R2 of the curve, and finally comprehensively determining the aging degree of the composite insulator according to the change situation of the linear fitting R2 of the curve and the volume resistivity of the round-slice high-temperature silicon sulfide rubber sampler. According to the present invention, the aging degree of the composite insulator is determined comprehensively according to the change situation of the linear fitting R2 of the curve and the volume resistivity of the round-slice high-temperature silicon sulfide rubber sampler, so that the operation is simple and convenient, and the accuracy of the evaluation result is improved, and accordingly, the reliable operation of a high voltage power transmission line is guaranteed.

Description

technical field [0001] The invention relates to a method for evaluating the material aging degree of a composite insulator according to the variation of volume resistivity with temperature. 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 degree of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 梁英陈逸昕梁培松刘云鹏花广如
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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