Conical insulator with VFTO suppression function

A technology of insulators and cones, applied in the field of power equipment, can solve the problems of charge accumulation on the surface of insulators and unstable operation of GIS equipment, etc., and achieve the effects of reducing electric field distortion, inhibiting charge accumulation, and maintaining reliability

Pending Publication Date: 2017-11-24
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a tapered insulator with VFTO suppression function to solve the problem of unstable operation of GIS equipment caused by the accumulation of charges on the surface of the insulator under the action of VFTO

Method used

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  • Conical insulator with VFTO suppression function
  • Conical insulator with VFTO suppression function
  • Conical insulator with VFTO suppression function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 1 A schematic structural diagram of a tapered insulator with a VFTO suppression function provided in the embodiment of the present application. see figure 1 , the conical insulator includes: a central insert 1 , an insulating zone 2 , a creepage zone 3 and a fixing flange 4 . Wherein, the central insert 1 is arranged on the top of a hollow cone, and the cone is divided into two parts, wherein one end close to the central insert 1 is an insulating area 2, and the rest is a creepage area 3, and the creepage The bottom of zone 3 is connected to the fixing flange 4 . That is to say, the longitudinal section of the insulator is a "V"-shaped structure.

[0028] Optionally, the material of the insulating region 2 is epoxy resin-based aluminum oxide, wherein the content of aluminum oxide is any value between 10% and 15%, such as 13%. It should be noted that the contents mentioned in this application all refer to mass percentage.

[0029] Optionally, the material of ...

Embodiment 2

[0040]The various parts of the tapered insulator provided in Example 1 of the present application, including the central insert 1, the insulating area 2, the creepage area 3 and the fixing flange 4, are integrated connection structures, rather than being connected by bolts, screws, etc. . This embodiment mainly describes the preparation method of the tapered insulator.

[0041] The integrated tapered insulator provided in the embodiment of the present application is prepared by vacuum casting. During the operation of GIS, under the action of VFTO, charges will be introduced on the surface of the insulator. Compared with the bolt connection, the integrated connection structure is beneficial to reduce the resistance of the insulator itself, and facilitate the dissipation of the charges accumulated on the surface of the insulator.

[0042] Specifically, the preparation method of the integrated tapered insulator provided in the embodiment of the present application is as follows...

Embodiment 3

[0047] In this example, tapered insulators with 0%, 10% and 15% of non-linear fillers added in the creepage zone 3 were used to carry out VFTO wave application experiments to test the dissipation effect of the tapered insulator on the surface charge. As follows.

[0048] image 3 The VFTO waveform diagram applied at the center insert 1 provided in the embodiment of the present application. Apply the VFTO wave at the central insert 1 of each of the above-mentioned conical insulators, and collect the surface potential data from the high-voltage electrode to the fixed flange 4 on the surface of each conical insulator, and obtain the following: Figure 4 The potential diagram of the high voltage electrode to the fixing flange 4 of the insulator is shown.

[0049] From Figure 4 It can be seen that in creepage region 3, the insulator with 0% addition of nonlinear material has the highest surface potential, followed by the insulator with 10% addition, and the insulator with 15% a...

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Abstract

The invention relates to the technical field of electric power equipment, in particular to a conical insulator with a VFTO suppression function. The conical insulator includes a center insert, an insulation area, a creepage area and a fixed flange, wherein the center insert is arranged at the top end of a hollow cone, and the end, close to the center insert, of the cone is provided with the insulation area, and the area except the insulation area is the creepage area; the bottom of the creepage area is connected with the fixed flange. When an external VFTO acts on the surface of the insulator, the resistivity of nonlinear packing in the local area of the creepage area decreases rapidly under the action of transient high voltage provided by the VFTO, so that charges accumulated on the surface of the insulator are dissipated in the propagation direction of the creepage area and the fixed flange, and therefore charge accumulation which is formed on the surface of the conical insulator by the VFTO is inhibited; therefore, the reliability of the insulator is maintained, electric field distortion on the surface of the insulator is reduced, and the stability of running of GIS equipment is improved.

Description

technical field [0001] The present application relates to the technical field of power equipment, in particular to a tapered insulator with a VFTO suppression function. Background technique [0002] GIS (Gas Insulated Switchgear, gas-insulated metal-enclosed combined electrical appliances) has many characteristics such as small footprint and space volume, safe and reliable operation, little influence from the natural environment, good breaking performance of circuit breakers, and convenient installation, so it is widely used in In the AC substation. Insulators are very important insulating parts in GIS, which play the roles of fixing, insulating and sealing. [0003] At present, the insulators commonly used in GIS equipment include central inserts, insulating areas and connection seats. When VFTO (Veryfast transient overvoltage, fast transient overvoltage) acts on the surface of the insulator, the insulator cannot dissipate the charge, which causes the insulator to withsta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/42H01B17/38
CPCH01B17/38H01B17/42
Inventor 何顺何金良李传扬谭向宇彭晶
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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