Heat convection testing method and system for composite insulator including artificial defect

Abstract

The invention provides a heat convection testing method and a system for a composite insulator including an artificial defect. The testing method comprises the steps of fixedly embedding a temperature measuring probe in the composite insulator and enabling the temperature measuring probe to be located on the junction face of a silicone rubber sheath and an epoxy resin core rod; adopting a direct current constant voltage source to perform power supply for the resistance defect of the composite insulator; utilizing the temperature measuring probe to perform real-time detection on the internal temperature of the composite insulator in the power supply process, recording the internal defect temperatures under different currents and using an infrared temperature measurement device to shoot and record the surface temperature distribution situation of the composite insulator; and performing compilation and analysis on recorded data to obtain the relation of the outer surface temperature rise and internal actual temperature rise of the composite insulator. The temperature measuring probe improvable in temperature and a special fixing method are adopted, reliable connecting strength, insulating strength and heating power can be achieved, and the measurement accuracy is finally ensured.

Description

technical field [0001] The invention relates to the technical field of detection of composite insulators, in particular to a heat convection test method and system for composite insulators containing artificial defects. Background technique [0002] Composite insulators, due to their light weight, good pollution flashover performance, and not easily damaged, have gradually replaced traditional glass and electric porcelain insulators and are widely used in power systems. As a key equipment of the power grid, the stability and reliability of composite insulators directly affect the safety of the entire power grid. The existing operating experience shows that although the overall operation of composite insulators is in good condition, accidents still occur in some composite insulators. In order to effectively avoid the occurrence and serious failure of composite insulators and cause huge economic losses, early monitoring methods are essential. As a widely used and easy-to-ope...

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Problems solved by technology

[0005] In order to better illustrate the relationship between the temperature rise of the outer surface of the composite insulator (that is, the result of infrared observation) and the actual temperature rise of the interior when the temperature rise occurs inside the composite insulator, a thermal convection test is required, and there is currently no point defect heating in the composite insulator The thermal convection test method

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