Composite insulator interface detection method

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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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; however, it can be obtained through tests that even though some products have lost their adhesiveness when they are boiled, their 100h water diffusion results are still close to or lower than the standard value, so the 100h water diffusion test standard of 100μA is urgent Need to adjust to improve the accuracy of the test results

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