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Arc extinguishing and/or insulating electrical equipment

An electrical equipment and arc extinguishing technology, applied in electrical components, switchgear settings, switchgear and other directions, can solve the problems of difficult insulation performance, high price, easy decomposition, etc., to ensure insulation capacity, easy to use, friendly, good The effect of electrical insulation

Active Publication Date: 2020-05-29
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CF 3 I gas is easy to decompose during the application process, and the decomposition products have an impact on arc extinguishing and insulation performance. At the same time, it is expensive, and the average occupational exposure level is 3-4ppm. in which use is prohibited on an industrial scale;
[0012] 3) g 3 Gas (heptafluoroisobutyronitrile gas C 4 f 7 N and CO 2 Mixed gas) and PFK gas (perfluoroketone gas C 5 f 10 O), corresponding medium and high-voltage electrical equipment has been developed and demonstration applications have been carried out, but heptafluoroisobutyronitrile has a certain carcinogenic risk and its own greenhouse effect GWP index is still high, and the liquefaction temperature of perfluoropentanone is very high. Application The environment is limited, and the insulation performance is difficult to meet the needs of high-voltage equipment

Method used

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  • Arc extinguishing and/or insulating electrical equipment
  • Arc extinguishing and/or insulating electrical equipment
  • Arc extinguishing and/or insulating electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] In this embodiment, the power frequency insulation properties of trans-1,1,1,4,4,4-hexafluoro-2-butene assembled at different electrode distances are tested. see figure 1 , is trans-1,1,1,4,4,4-hexafluoro-2-butene / CO in Example 1 2 Mixed gas (HFO-1336mzz(E) / CO 2 ) When the partial pressure of trans-1,1,1,4,4,4-hexafluoro-2-butene is 0.6 bar and the inflation pressure is 7 bar, the graph of power frequency breakdown voltage changing with electrode distance. figure 1 showed that with increasing electrode distance, trans-1,1,1,4,4,4-hexafluoro-2-butene / CO 2 The power frequency breakdown voltage of the mixed gas increases approximately linearly. When the electrode distance is 1mm, the power frequency breakdown voltage is 51kV. When the electrode distance increases to 5mm, the power frequency breakdown voltage is 140kV, and the rate of increase is 26.25kV / mm. The results showed that under a uniform electric field, trans-1,1,1,4,4,4-hexafluoro-2-butene / CO 2 The power freq...

Embodiment 2

[0071] In this embodiment, the power frequency insulation properties of trans-1,1,1,4,4,4-hexafluoro-2-butene assembled at different air pressures are tested. see figure 2 , is trans-1,1,1,4,4,4-hexafluoro-2-butene / CO in Example 2 2 Mixed gas (HFO-1336mzz(E) / CO 2 ) fixed trans-1,1,1,4,4,4-hexafluoro-2-butene partial pressure of 0.7 bar, the graph of power frequency breakdown voltage changing with inflation pressure. figure 2 showed that with the increase of inflation pressure, trans-1,1,1,4,4,4-hexafluoro-2-butene / CO 2 The power frequency breakdown voltage of the mixed gas increases approximately linearly. At 3bar, the power frequency breakdown voltage is 92.3kV. When the air pressure rises to 5bar, the power frequency breakdown voltage is 124.5kV, with a rising rate of 16.1kV / bar. The results showed that under a uniform electric field, trans-1,1,1,4,4,4-hexafluoro-2-butene / CO 2 The power frequency insulation strength of the mixed gas increases linearly with the increase...

Embodiment 3

[0073] In this example, trans-1,1,1,4,4,4-hexafluoro-2-butene / CO 2 Mixed gas and SF 6 The power frequency breakdown voltage test, the results please refer to image 3 , which is trans-1,1,1,4,4,4-hexafluoro-2-butene / CO in Example 3 2 Mixed gas (HFO-1336mzz(E) / CO 2 ) and SF 6 The results of the power frequency breakdown voltage test, the results show that the power frequency when the partial pressure of trans-1,1,1,4,4,4-hexafluoro-2-butene is 0.6bar and the inflation pressure is 1.2bar The breakdown voltage is 52.7kV, with SF 6 The power frequency breakdown voltage under this inflation pressure condition is equivalent, indicating that trans-1,1,1,4,4,4-hexafluoro-2-butene has good insulating properties.

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Abstract

The invention belongs to the technical field of electrical equipment, and relates to arc extinguishing and / or insulating electrical equipment. According to the arc extinguishing and / or insulating electrical equipment of the invention, trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene or a mixed gas containing trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene is used as a medium-voltage and high-voltage arc extinguishing and / or insulating medium; the insulating medium has good electrical insulation and arc extinguishing performance, can greatly improve insulation capability, replaces the filling of SF6 in the arc extinguishing and / or insulating electrical equipment and reduces the influence of SF6 emission on the environment; and therefore, the problem of SF6 emission can be fundamentally solved, and theapplication temperature range of the arc extinguishing and / or insulating electrical equipment can be expanded.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to arc extinguishing and / or insulating electrical equipment. Background technique [0002] Gas insulating medium is widely used in various electrical equipment and is especially used in the insulation of gas-insulated switchgear or its conductive parts. Among them, sulfur hexafluoride (SF 6 ) gas as a gas insulating medium is most widely used in medium-voltage and high-voltage arc extinguishing / insulating electrical equipment. [0003] Sulfur hexafluoride (SF 6 ) gas has excellent arc extinguishing performance and relatively high dielectric strength. Under standard atmospheric pressure, its breakdown voltage is nearly three times that of air. At the same time, the gas is chemically inert, non-toxic, non-flammable, non-explosive and thermodynamically stable. Based on the above advantages, SF 6 Medium-voltage and high-voltage electrical equipment and their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B13/055
CPCH02B13/055
Inventor 唐念李丽周永言
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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