GIS epoxy resin surface charge characteristic and trap energy level distribution representing device and method

A technology of epoxy resin and trap energy level, which is applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of complicated research on working status and aging degree

Inactive Publication Date: 2017-08-15
TIANJIN UNIV
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The special working environment of insulators makes the resea

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  • GIS epoxy resin surface charge characteristic and trap energy level distribution representing device and method
  • GIS epoxy resin surface charge characteristic and trap energy level distribution representing device and method
  • GIS epoxy resin surface charge characteristic and trap energy level distribution representing device and method

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] Such as figure 2 Shown is the test device of the embodiment of the present invention. It is divided into two parts: high-voltage charging device and potential measuring device. The high-voltage charging device is used to charge the surface of the sample through corona discharge, and the potential measuring device is used to measure the electrostatic potential of the epoxy resin surface to be tested. Select a stainless steel needle with a diameter of 1 mm and a tip curvature radius of about 13 μm as the needle electrode 1 of the high-voltage charging device. The height of the needle tip from the sample is 5 mm, and it is located directly above the center of the sample 6. The needle electrode 1 is respectively connected to the ...

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Abstract

The invention discloses a GIS epoxy resin surface charge characteristic and trap energy level distribution representing device and method. The device comprises a high voltage charging device and a potential measuring device. Different types of voltage are applied to the surface of epoxy resin, wherein the applying process is corona discharge. The release time of charges and the potential dissipation process in an epoxy resin insulator trap are calculated. A tdV/dt curve is drawn by analyzing and calculating the measured potential dissipation process to represent the dynamic characteristic of charges on the surface of the epoxy resin insulator and the trap energy level distribution. According to the invention, a surface potential measurement technology and the existing instrument are used to measure the surface charges of an epoxy resin sample under different voltage types; the measurement data are processed mathematically to clarify the transport characteristic of the charges inside the epoxy resin; and the device and the method provide an important theoretical basis for solving the problem of flashover of the epoxy insulator surface and evaluating the aging state, and have the typical guiding significance of engineering practice.

Description

technical field [0001] The invention relates to the technical field of surface charge measurement of GIS epoxy resin insulators, in particular to a method for characterization of surface charge characteristics and trap energy level distribution of GIS epoxy resin under combined action of alternating current and pulse. Background technique [0002] Compared with traditional open-type high-voltage power distribution equipment, gas-insulated combined electrical equipment (GIS) has the advantages of small footprint, high reliability and long maintenance cycle, so it is widely used in urban power plants, power generation substations, metallurgical plants and transmission lines and other occasions. Epoxy resin insulators are used as the main components of GIS, including pot insulators, post insulators and insulating tie rods. The surface flashover of GIS pot insulators is the main form of insulation fault of GIS. The partial discharge in the GIS and the normal field strength of ...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 杜伯学杜强李进梁虎成刘勇薛巨邵
Owner TIANJIN UNIV
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