Composite insulator interface detection method

A technology of composite insulators and detection methods, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effect of improving accuracy and prolonging the boiling time

Inactive Publication Date: 2016-08-31
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Application Information

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Problems solved by technology

The patent number is 201210110874.3, and the patent name is "a method and system for detecting the interface of composite insulators", which proposes a solution that can effectively identify the debonding defect at the interface between the sheath and the mandrel. This solution uses 100h The water diffusion test standard is 100μA;

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Embodiment Construction

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] There are many defects at the interface of composite insulators, but there is no specific detection method for the debonding defect at the interface between the sheath and the mandrel, that is, the defect of the bonding quality at the interface between the sheath and the mandrel. The invention provides a method for detecting debonding defects at the interface between the sheath and mandrel of a composite insulator. During the experiment, the debonding defects will become more obvious, there will be moisture intrusion in the defect, and the conductivity of the material will increase. At this time, a gradually rising voltage is applied to the composite insulator, and the current density at the defect will increase. Then the leakage current will increas...

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Abstract

The invention discloses a composite insulator interface detection method. The method comprises the following steps of sampling from composite insulators to be detected to acquire an experiment group insulator and a reference group insulator, and then carrying out a water boiling experiment on the experiment group insulator, wherein water boiling time is 300h; installing the reference group insulator and the experiment group insulator on an electrode structure of a respective high voltage circuit and applying a voltage on the electrode structure; through a leakage current detection apparatus in the high voltage circuit, detecting leakage currents of the experiment group insulator and the reference group insulator, and simultaneously, through a surface temperature tester, testing surface temperatures of the experiment group insulator and the reference group insulator; and according to the leakage currents and the surface temperatures of the experiment group insulator and the reference group insulator, determining whether an interface of a sheath of each composite insulator to be detected and a core rod has a debonding type defect. By using the method, the insulator whose interface has the defect or hydrolysis resistance performance is poor can be effectively determined.

Description

technical field [0001] The invention relates to the detection field of insulator interface, in particular to a detection method of composite insulator interface. Background technique [0002] The interface quality of composite insulators is closely related to the overall operating performance. In recent years, many insulators in my country have broken due to interface defects, causing huge economic losses to the power grid and seriously affecting the development of the national economy. [0003] The water diffusion test method is currently the most effective method for testing the bonding performance of the interface of composite insulators. Internationally, in the earlier IEC61109-1992 and the newer IEC62217-2012, it is recommended to use the method of boiling for 100h, and the leakage current does not exceed 1000μA to detect it. In China, people pay more and more attention to the interface defects. , the latest GB / T19519-2014 has reduced the 100h water diffusion test stan...

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张福增王黎明何子兰成立
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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