Device for insulating material surface flashover experiment and using method thereof

A technology of insulating materials and flashover along the surface, which is applied in the direction of testing dielectric strength, etc., can solve the problems of difficult structure control, waste of working time, environmental pollution, etc., and achieve the effect of reducing the number of opening times

Active Publication Date: 2015-07-08
JILIN ELECTRIC POWER RES INST +2
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  • Abstract
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Problems solved by technology

This results in frequent replacement of insulating sample materials in the experimental chamber and multiple replacements of gas components and pressures. Researchers repeat the opening of the experimental chamber, placing samples, vacuuming, standing still, inflating, experimenting, and exhausting. Not only was a lot of work time wasted, but it made SF 6 Excessive use of gas, causing environmental polluti

Method used

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  • Device for insulating material surface flashover experiment and using method thereof
  • Device for insulating material surface flashover experiment and using method thereof
  • Device for insulating material surface flashover experiment and using method thereof

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Embodiment Construction

[0035] Such as figure 1 As shown, the device of the present invention comprises a test cavity (1), a support device (2), a flowmeter (5), a gas cylinder (7), a molecular pump (8), a low pressure switch (9), an oscilloscope (11), a high pressure Power supply (13) etc. Among them, the experimental cavity (1) is a closed cavity made of stainless steel, and there are high and low pressure sleeves, suction and air inlets, and observation windows on the cavity, and the flow meter (5) is a gas flow meter. The connected solenoid valve (6) is used to adjust the flow rate of the incoming gas. Gas cylinders (7) consist of two cylinders, one carrying SF 6 gas, another carrying experiment required with SF 6 The mixed gas and the two kinds of gas are controlled by the solenoid valve (6) and the flow meter (5) connected to it to control the inflation speed, and finally reach the required experimental gas mixing ratio. The cylinder (7) is filled with SF 6 Gas, the molecular pump (8) is c...

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Abstract

The invention provides a device for insulating material surface flashover experiment in SF6. Compared with a previous single-pole-pair or multi-pole-pair connecting rod type experimental cavity, the device of the invention can be used to simultaneously study the experiment characteristics of surface flashover under the same atmospheric pressure and different electrode distances and the experiment characteristics of surface flashover under the same flashover distance and different gas pressures, thus realizing the study of multiple insulating samples in a single experiment. Therefore, the number of opening times of the experimental cavity can be reduced, the experimental time and cost are saved, and the use and leakage of SF6 gas are reduced. The device of the invention has the advantages of simple structure, convenient operation, cost saving, high repeatability, and the like.

Description

technical field [0001] The present invention relates to the technical field of product design, especially in the field of SF 6 A device for surface flashover experiments of insulating materials in gas. Background technique [0002] According to statistical analysis, the vast majority of GIS (Gas Insulated Switchgear, gas insulated fully enclosed combined electrical appliances) currently use SF 6 Gas acts as an insulating medium. This is because SF 6 The gas has high electrical insulation strength and excellent arc extinguishing performance, and is widely used in the insulation system of various high-voltage equipment. However in GIS, SF 6 Surface discharge often occurs at the interface between gas and insulating materials. When the discharge develops to penetrate the two poles and break down the entire air gap along the surface, the surface discharge will evolve into a surface flashover. Flashover occurs along the surface in GIS, which will make SF 6 The gas decomposes...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 林海丹刘熊梁义明邵涛章程孙友群
Owner JILIN ELECTRIC POWER RES INST
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