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A gas-insulated GIL size effect test electrode device and its production and test methods

A size effect, test electrode technology, applied in the direction of testing dielectric strength, test ship construction, etc., can solve problems such as harsh test conditions, achieve the effect of solving small site, wide application range, and reducing test conditions

Inactive Publication Date: 2021-02-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the test conditions required for EHV and UHV GIL design are too harsh, for example, UHV test halls, UHV power frequency and impulse voltage generators, large-size GIL test chambers, and large quantities of insulating gas supply are required. Difficult problems such as the EHV and UHV GIL design require experimental research

Method used

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  • A gas-insulated GIL size effect test electrode device and its production and test methods
  • A gas-insulated GIL size effect test electrode device and its production and test methods
  • A gas-insulated GIL size effect test electrode device and its production and test methods

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] Among them, 1-cylindrical electrode, 2-cylindrical electrode, 3-metal support and its cover, 4-insulation support cover, 5-insulation support, 6-base; 7-high voltage electrode, 8-basin insulator, 9 - Ground screw.

[0027] The invention provides a simulated GIL test electrode device with different scaling ratios. The device can be used to carry out various high-voltage tests. After fitting the test results and data, the required ultra-high and ultra-high voltage GIL shocks can be deduced. Design value of field strength. The technical solution adopted in the present invention is: design and use a GIL scale model, which includes: coaxial electrodes, electrode brackets and bases; use the device to carry out various tests under high-voltage direct current, power frequency and impact, and obtain corresponding conditions, and deduce the situation in...

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Abstract

The invention relates to a gas-insulated GIL size effect test electrode device and its production and test methods. It consists of a coaxial electrode, an electrode bracket and a base. The coaxial electrode consists of a cylindrical electrode and a cylindrical electrode. The bracket consists of an insulating bracket and a metal bracket. The grounding of the cylindrical electrode is supported by two metal supports, and the cylindrical electrode is a high-voltage electrode supported by an insulating support. The device mainly involves the ratio of the inner diameter of the cylindrical electrode to the outer diameter of the cylindrical electrode. The electric field unevenness of the model must be consistent with the electric field unevenness of the target GIL. The ratio of the inner diameter of the cylindrical electrode to the outer diameter of the cylindrical electrode is between 2.7 and 4.4. During this period, multiple sets of scaled GIL electrode devices can be designed and manufactured according to the test conditions to improve the matching degree of fitting to the target GIL data. The device has a wide range of applications and is suitable for various types of high-voltage tests, including tests under DC, impact, and power frequency. It reduces the amount of insulating gas used in the test, and reduces the limitations of the test site and power supply equipment.

Description

technical field [0001] The invention relates to a gas insulation equipment GIL size effect test electrode device and a test method. Background technique [0002] Gas-insulated transmission line (GIL) is a gas-insulated transmission pipeline, which is similar in structure to the busbar in GIS. It is a transmission technology developed in the late 1960s and early 1970s for use in substations, hydropower stations and underground facilities. . Facing the power transmission market with ever-increasing power transmission capacity and stricter environmental and landscape requirements, EHV and UHV GILs are regarded as an effective alternative to power cables and overhead lines, and their applications are increasingly widespread. GIL is composed of a pair of coaxial aluminum alloy tube conductors, the inner conductor is charged with high voltage and bears the current, the outer shell is grounded, and SF is filled between the two 6 Or other insulating gas medium, and a certain dista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/16
CPCG01R31/16
Inventor 张天然郑宇周文俊喻剑辉
Owner WUHAN UNIV
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