GIS insulator surface charge accumulation inhibition method based on linear gradient treatment

A surface charge and insulator technology, applied in the field of modified polymer materials and their preparation, can solve the problems of increasing the occurrence of surface flashover, local field strength distortion along the surface of basin insulators, frequent insulator failures, etc., and improve the operation stability. Effect

Inactive Publication Date: 2018-07-24
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even in the demanding 1000kV AC UHV project, epoxy cast insulators still have frequent failures
[0003] It is generally believed that during the operation of GIS/GIL, the surface of the pot insulator will accumulate a large amount of charge under the

Method used

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  • GIS insulator surface charge accumulation inhibition method based on linear gradient treatment
  • GIS insulator surface charge accumulation inhibition method based on linear gradient treatment
  • GIS insulator surface charge accumulation inhibition method based on linear gradient treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 1) Mix the epoxy resin base and curing agent according to the mass ratio of 3:1, and use a mechanical stirrer to stir for 60 minutes to make it evenly mixed; then use an air pump and a vacuum box to degas the epoxy resin mixture for 40 minutes, , the vacuum degree is -0.1MPa; then pour it into a mold coated with a release agent, solidify, cool, and demould, that is.

[0041] 2) Epoxy resin materials are processed by gradient temperature curing method. The curing process is divided into two steps. First, the mold and base material are heated to 70°C for 4 hours, and then heated to 130°C for 4 hours. After complete curing, cool down , Demoulding promptly obtains the epoxy resin insulation sample.

[0042] 3) Gradient design is carried out on the epoxy resin insulation sample according to the strip pattern, that is, its surface is divided into five closely connected rectangles from left to right, and the relative permittivity of the rectangles is reduced in turn: the epoxy...

Embodiment 2

[0046] 1) Mix the epoxy resin base and curing agent according to the mass ratio of 3:1, and use a mechanical stirrer to stir for 90 minutes to make it evenly mixed; then use an air pump and a vacuum box to degas the epoxy resin mixture for 60 minutes, , the vacuum degree is -0.1MPa, and then it is poured into a mold coated with a release agent, solidified, cooled, and demoulded, and the product is obtained.

[0047] 2) Epoxy resin is processed by gradient temperature curing method. The curing process is divided into two steps. First, heat the mold and base material to 70°C for 4 hours, and then heat to 130°C for 4 hours. After complete curing, cool, The epoxy resin insulation sample can be obtained after demoulding.

[0048] 3) The epoxy resin insulation sample is designed according to the gradient of the ring pattern, that is, its surface is divided into five closely connected rings from the inside to the outside, and the relative permittivity of the rings is reduced in turn:...

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Abstract

The invention discloses a GIS insulator surface charge accumulation inhibition method based on linear gradient treatment; the method comprises the following steps: 1, preparing an epoxy resin material; 2, using a gradient temperature solidification method to process the epoxy resin material; 3, carrying out gradient design for the epoxy resin insulation sample: a, splitting the surface of the epoxy resin insulation sample into 5 rectangles tightly connected from left to right, and decreasing the relative dielectric constants of the rectangles in order; b, placing the epoxy resin insulation sample into a magnetron sputtering device, sputtering different positions for different time ranges varying from 0-60min, thus obtaining the epoxy resin material with two dimension gradient distribution. The method can inhibit the insulator surface charge accumulation under an AC voltage, thus improving the insulator voltage withstand performance, and improving the GIS operation stability and powersystem safety.

Description

technical field [0001] The invention belongs to the field of modified polymeric materials in the manufacture of high-voltage equipment and its preparation, and relates to a method based on linear gradient treatment to suppress the accumulation of charges on the surface of GIS insulators. Background technique [0002] In recent years, with the development of high-voltage and large-capacity power transmission in power systems, gas-insulated metal-enclosed switchgear (GIS) and gas-insulated metal-enclosed transmission lines (GIL) have advantages, has been widely concerned and applied. Among them, the pot insulator not only plays the role of mechanical support, but also acts as an electrical insulator, which plays a decisive key role in the safe and stable operation of the entire GIS and GIL. However, even in the demanding 1000kV AC UHV project, epoxy cast insulators still have frequent failures. [0003] It is generally believed that during the operation of GIS / GIL, the surfa...

Claims

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Application Information

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IPC IPC(8): H01B19/00H01B19/02H01B19/04C08L63/00
CPCC08L63/00H01B19/00H01B19/02H01B19/04
Inventor 杜伯学王泽华李进冉昭玉梁虎成
Owner TIANJIN UNIV
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