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220kVGIL insulator voltage-sharing method based on non-linear conductive epoxy resin

An epoxy resin, 220kvgil technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complex electric field distribution at the gas-solid interface under DC

Inactive Publication Date: 2019-06-07
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrical conductivity of epoxy resin composites varies with the electric field and temperature, which makes the electric field distribution of the gas-solid interface more complicated under direct current.

Method used

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  • 220kVGIL insulator voltage-sharing method based on non-linear conductive epoxy resin
  • 220kVGIL insulator voltage-sharing method based on non-linear conductive epoxy resin
  • 220kVGIL insulator voltage-sharing method based on non-linear conductive epoxy resin

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Embodiment Construction

[0027] The present invention will be further described below by specific examples. The embodiments of the present invention are intended to enable those skilled in the art to better understand the present invention, and do not limit the present invention in any way.

[0028] 1. Establish a simplified GIL model, with figure 1 Shown is the section view of the simulated geometry model of the simplified basin insulator. This paper intends to apply 220kV DC voltage to the above insulator in the simulation calculation.

[0029] 2. Set the electrical, thermal and basic parameters of the GIL guide rod, as shown in Attached Table 1. set SF 6 Normal temperature and pressure is 0.4Mpa, SF under 0.4Mpa 6 The parameters of the gas part are shown in Table 2. The thermal conductivity of gas increases with the increase of temperature, but in a considerable pressure range, the thermal conductivity of gas changes little with temperature and can be ignored. SF 6 The formula for the varia...

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Abstract

The invention discloses a 220kV GIL insulator voltage-sharing method based on non-linear conductive epoxy resin. The method comprises the following steps: 1) establishing a simplified GIL model; 2) setting various electrical, thermal and basic parameters of different materials of the GIL: setting the normal temperature pressure of SF6 to be 0.4 Mpa; and 3) establishing a finite element model of the direct current GIL, and performing mesh generation on the model. After the non-linear conductive epoxy resin is adopted to replace a common epoxy resin insulator, the surface electric field distortion degree of the insulator is greatly improved compared with that of the common epoxy insulator. The uniformity of electric field intensity distribution of the upper and lower surfaces is obviously improved, and the maximum value of the electric field intensity of the upper surface of the insulator is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of high-voltage equipment, and relates to a method for equalizing voltage of 220kV GIL insulators based on nonlinear conductance epoxy resin. Background technique [0002] Gas Insulated Transmission Line (GIL) technology has become the first choice to replace overhead transmission lines and power cables for power transmission in special environments due to its advantages of large transmission capacity and low loss. The distribution of the electric field at the gas-solid interface is an important factor that determines the reliable operation of DC gas-insulated pipelines. Especially under load conditions, the heating of the guide rod produces a temperature gradient in the radial direction of the insulator, resulting in distortion of the electric field, and insulation failures are prone to occur during operation. The electrical conductivity of epoxy resin composites varies with the electric field and temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 杜伯学张程梁虎成李进王浩鸣房晟辰
Owner TIANJIN UNIV
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