GIL (gas insulated metal enclosed transmission line) epoxy resin surface charge measuring device and method

A technology of epoxy resin and surface charge, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of complex research on working status and aging degree

Inactive Publication Date: 2017-05-31
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The special working environment of insulators in GIL makes the r

Method used

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  • GIL (gas insulated metal enclosed transmission line) epoxy resin surface charge measuring device and method
  • GIL (gas insulated metal enclosed transmission line) epoxy resin surface charge measuring device and method
  • GIL (gas insulated metal enclosed transmission line) epoxy resin surface charge measuring device and method

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Embodiment Construction

[0030] 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.

[0031] 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 function of the high-voltage charging device is to inject charges to the surface of the sample, and the potential measuring device is used to measure the electrostatic potential of the sample surface. In the high-voltage charging device, a stainless steel needle with a diameter of 1 mm and a tip curvature radius of about 13 μm is selected 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 respectiv...

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Abstract

The invention discloses a GIL (gas insulated metal enclosed transmission line) epoxy resin surface charge measuring device and method. The device comprises a high-voltage charging device and a potential measurement device; different types of voltage actions are exerted on the GIL epoxy resin surface to be measured; a voltage boosting process is corona discharge; the charge trapping and trapping-out states are calculated; the specimen surface potential dissipation curves, different position potential distribution curves and the specimen trap energy level density distribution curves after the action by different types of corona are drawn; a GIL epoxy resin surface charge measuring result is obtained; the charge transportation characteristics are analyzed; the aging state and the service life of epoxy resin are accurately judged. By using a surface potential measuring technology and the existing instruments, the epoxy resin specimen surface charges under the actions of different voltage types are measured; the measuring data is subjected to mathematical processing; the transportation characteristics of the charges inside the epoxy resin are found out; the important theoretical basis is provided for solving the epoxy insulator surface flashover problem and the aging state evaluation problem; typical engineering practical guiding significance is realized.

Description

technical field [0001] The invention relates to the technical field of charge measurement on the surface of a GIL epoxy resin insulating part, in particular to a method for measuring the surface charge of a GIL epoxy resin based on the combined action of DC pulses. Background technique [0002] In recent years, with the development of high-voltage direct current transmission technology, more and more countries have begun to pay attention to and study its advantages in the field of power transmission, and have established high-voltage direct current transmission systems. As a new type of power transmission, gas-insulated metal-enclosed transmission line (GIL) can be applied to large-capacity, long-distance HVDC transmission systems due to its advantages of large transmission capacity, low loss, and high reliability. Epoxy resin is cheap to manufacture, has excellent mechanical and electrical properties, and is used to manufacture the main insulating parts of GIL, including po...

Claims

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Application Information

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IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 杜伯学杜强李进梁虎成刘勇韩涛薛巨邵
Owner TIANJIN UNIV
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