CN103913682A - Insulating gas insulating performance experiment system and method thereof applied to electrical equipment - Google Patents
Insulating gas insulating performance experiment system and method thereof applied to electrical equipment Download PDFInfo
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- CN103913682A CN103913682A CN201410122442.3A CN201410122442A CN103913682A CN 103913682 A CN103913682 A CN 103913682A CN 201410122442 A CN201410122442 A CN 201410122442A CN 103913682 A CN103913682 A CN 103913682A
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Abstract
The invention provides an insulating gas insulating performance experiment system and a method thereof applied to electrical equipment. The insulating gas insulating performance experiment system and the method thereof applied to the electrical equipment is targeted to the defect of an insulating gas discharging decomposition device. By means of the insulating gas insulating performance experiment system and the method thereof applied to the electrical equipment, an insulating performance experiment of high-low pressure insulating gas in the electrical equipment can be conducted, various defects of a real GIS can be effectively simulated, the insulating performance of various replaced gas and mixed gas of the replaced gas under the experiment condition of different defects, different mixing ratios and different air pressure can be obtained, comparing with SF6 gas under the same experiment condition is conducted, and the experiment basis for replacing the SF6 gas is provided.
Description
Technical field
The invention belongs to the new gas insulating material of high voltage field, be specifically related to experimental system and the method thereof of the New insulated gas-insulated performance that is applied to electrical equipment.
Background technology
SF
6gas has good insulation and arc extinction performance, is widely used in the high voltage electric power equip ment such as gas insulated combined electrical equipment (GIS) and gas-break switch (GCB).But SF
6as a kind of greenhouse gases that atmospheric environment is had to very large harm, the potential value of its greenhouse effect (GWP) is CO
223900 times, and in atmosphere approximately 3200 life-spans, global warming is had to cumulative effect, therefore the United Nations's climate change pact contracting party 1997 sign Kyoto Protocol in, by SF
6gas is classified one of greenhouse gases of six kinds of Limited uses as, requires substantially to limit SF to the year two thousand twenty
6the use of gas.Chinese scholars has been carried out a large amount of research, wishes to find a kind of eco-friendly SF
6place of gas as the new medium in electrical equipment.In view of the requirement of day by day urgent environmental protection, to SF
6the research of place of gas is significant.
As SF
6place of gas, require environmental friendliness, and insulating property exceed SF
6gas or and SF
6gas is comparable.Potential alternative SF
6gas comprise the electronegative gas that some contain F atom, as octafluorocyclobutane (c-C
4f
8), perfluoropropane (C
3f
8), perfluoroethane (C
2f
6), CF3I (CF
3i) etc.Must consider engineering reality to the research of place of gas insulating property, by solid protrusion defect, free metal particle defects, insulator contamination defect, insulator void defects in Reality simulation GIS, insulating property to place of gas under power frequency, direct current, surge voltage are studied, and with the same terms under SF
6gas-insulated performance is compared, and obtains the omnibearing insulating property information of place of gas.
Existing electrical equipment gas-insulated experimental apparatus for capability; as number of patent application " insulating gas shelf depreciation decomposition components multizone detection system and the method thereof " patent that is 201210089955X, the disclosed system of this patent mainly comprises pressure regulator, isolating transformer, halo-free testing transformer, without shelf depreciation protective resistance, capacitive divider, insulating gas electric discharge decomposer, ultra-high frequency antenna, noninductive detection impedance, coupling capacitance, high-speed figure storage oscilloscope and gas chromatograph-mass spectrometer etc.Wherein insulating gas electric discharge decomposer is made up of stainless steel cover plate and glass tank body, adopts solid protrusion defect in pin-plate electrode Reality simulation GIS.The shortcoming that this patent exists: 1) floating potential discharge problem, when trial voltage is higher, between the high-voltage conductive rod of insulating gas electric discharge decomposer and stainless steel cover plate, discharge prior to installing inner electrode, experiment cannot be carried out; 2) distance of pin-plate electrode in can not fine adjustment insulating gas decomposer, by flexible pin-plate electrode distance adjustment that realizes of high-voltage conductive rod, distance adjustment is difficult for realizing and is accurate not; 3) Reality simulation GIS effectively, insulating gas decomposer is withstand voltage is only 0.4MPa, and true GIS withstand voltage be 0.4-0.6MPa, the air pressure being filled with is generally 0.5MPa; 4) insulating gas electric discharge decomposer tank body volume is larger, expends gas, and the price of place of gas is relatively high, as CF
3the price of I gas is SF under same condition
610 times of gas, each test expends a large amount of gas.For the various defects of effective Reality simulation GIS, more accurately obtain SF
6and the insulating property data of place of gas under various voltage types, be necessary existing insulating gas electric discharge decomposer to carry out many-sided improvement.
Summary of the invention
The object of this invention is to provide a kind of insulating gas insulating property experimental system and method thereof that is applied to electrical equipment, can carry out the insulating property experiment of high-low pressure insulating gas in electrical equipment, also the effective various defects of Reality simulation GIS, obtain the insulating property of various place of gas under different defects, different blended composition and division in a proportion, different air pressure and mixed gas thereof, and with same experimental conditions under SF6 gas contrast, for substitute SF6 gas experimental basis is provided.
Such for realizing the technical scheme that the object of the invention adopts, a kind of insulating gas insulating property experimental system that is applied to electrical equipment, this system comprises high-tension electricity generating means, measurement mechanism and insulating gas test unit.
Described high-tension electricity generating means comprises pressure regulator, halo-free testing transformer, puts protective resistance and coupling capacitance without office.The primary side of described pressure regulator is electrically connected with the city of 380V by wire, and the secondary side of described pressure regulator is connected with the primary side of described halo-free testing transformer by cable.Described coupling capacitance has A, two terminals of B.The A terminals series connection of coupling capacitance is put after protective resistance without office, is connected with the high-pressure side of the secondary side of halo-free testing transformer.The B terminals of described coupling capacitance are connected after noninductive detection impedance, are connected with the low pressure end of the secondary side of halo-free testing transformer.The low pressure end ground connection of the secondary side of described halo-free testing transformer.
Described measurement mechanism comprises ultra-high frequency antenna and high-speed figure storage oscilloscope.Described high-speed figure storage oscilloscope has at least two signal access port, one of them signal access port by signal wire be connected with ultra-high frequency antenna, another signal incoming end is connected with the B terminals of coupling capacitance.
Described insulating gas test unit comprises outer tank, inner canister, outer tank gas equipment and the inner canister gas equipment of keeping forging ahead of keeping forging ahead:
Described outer tank comprises the outer tank shell that a stainless steel is made.The hollow circuit cylinder cylinder that described outer tank shell is a left and right open at both ends.With after the outer tank shell of two outer tank cover plates shutoff two ends uncovered, the inside of outer tank shell has impermeability.Outer tank cover plate described in two is made by transparent material.Described ultra-high frequency antenna is arranged on outer tank enclosure interior, and described signal wire penetrates the sidewall of described outer tank shell.The sidewall of described outer tank shell also embeds outer tank high-voltage conductive rod, the first connecting duct and the second connecting duct.
Described inner canister is arranged on the inside of outer tank.Described inner canister comprises an interior tank shell of being made up of transparent material.Described interior tank shell is a hollow circuit cylinder cylinder that upper/lower terminal is uncovered.After the upper end uncovered employing upper cover plate shutoff of described interior tank shell, lower end uncovered employing base shutoff, the inside of interior tank shell has impermeability.Described upper cover plate is made up of teflon, and its middle part embeds tank high-voltage conductive rod.Described inner canister high-voltage conductive rod penetrates one end connecting needle electrode of interior tank shell.It is unsettled that described pin electrode upper end is connected to inner canister high-voltage conductive rod upper and lower end.One end that described outer tank high-voltage conductive rod penetrates outer tank enclosure interior connects wire by high pressure and is connected with inner canister high-voltage conductive rod.Expose outside one end of tank shell outside of described outer tank high-voltage conductive rod is connected with the A terminals of coupling capacitance by high-voltage conducting wires.Described base is made up of stainless steel.Elevation and subsidence regulating device is installed in the below of base.The upper end of described elevation and subsidence regulating device is a lifting shaft.Base is that middle part embeds base insulation sleeve.Described base insulation sleeve is the hollow circuit cylinder cylinder that teflon is made, and passes low voltage conductive bar in this cylindrical drum.Described low voltage conductive bar lower end is connected on described lifting shaft, upper end web joint electrode.Described plate electrode is metal disk, and its upper surface is positioned at the below of pin electrode.Described base embeds a conduit.A mouth of pipe of described conduit outside tank shell inside, another mouth of pipe is connected with the second connecting duct.
The described outer tank gas equipment of keeping forging ahead comprises the first keep forging ahead tracheae, the first baro-vacuum gauge, the first valve, the second valve, the 3rd valve, the first vacuum pump and the first gas cylinder.Described first tracheae of keeping forging ahead is a three-way pipeline, and its three mouths of pipe are installed respectively the first valve, the second valve and the 3rd valve.Keeping forging ahead in described first valve one end and first, tracheae is connected, the other end is connected with described the first connecting duct by pipeline.Keeping forging ahead in described second valve one end and first, tracheae is connected, the other end is connected with the air intake opening of the first vacuum pump.Keeping forging ahead in described the 3rd valve one end and first, tracheae is connected, the other end is connected with the gas outlet of the first gas cylinder.Connect on the pipeline of described the first valve and described the first connecting duct the first baro-vacuum gauge is installed.
The described inner canister gas equipment of keeping forging ahead comprises the second keep forging ahead tracheae, the second baro-vacuum gauge, the 4th valve, the 5th valve, the 6th valve, the second vacuum pump and the second gas cylinder.Described second tracheae of keeping forging ahead is a three-way pipeline, and its three mouths of pipe are installed respectively the 4th valve, the 5th valve and the 6th valve.Keeping forging ahead in described the 4th valve one end and second, tracheae is connected, the other end is connected with described the second connecting duct by pipeline.Keeping forging ahead in described the 5th valve one end and second, tracheae is connected, the other end is connected with the air intake opening of the second vacuum pump.Keeping forging ahead in described the 6th valve one end and second, tracheae is connected, the other end is connected with the gas outlet of the second gas cylinder.Connect on the pipeline of described the 4th valve and described the second connecting duct the second vacuum pump is installed.
Further, in described high-tension electricity generating means, also comprise capacitive divider, one end of described capacitive divider is connected with the A terminals of coupling capacitance, the other end is connected altogether with the low pressure end of the secondary side of halo-free testing transformer.
Further, the junction overcoat grading shield of described outer tank high-voltage conductive rod and high-voltage conducting wires.
Further, in such scheme, embed the conducting rod of outer tank shell or interior tank shell, and penetrate the wire of outer tank shell or interior tank shell, all external insulating sleeves.The tapping of outer tank shell or interior tank shell has all done impermeability processing, ensures that the outer tank and the inner canister that assemble have impermeability.
The method that the present invention also openly adopts above-mentioned experimental system to test, comprises the following steps:
1) install the various piece of experimental system, check the impermeability of inner and outer tank, check whether reliable ground of earth point.The primary side of described pressure regulator does not access power supply.
2) open the first valve and the second valve, close the 3rd valve, start the external tank shell of the first vacuum pump inside and vacuumize.
3) in described the first gas cylinder, SF is housed
6gas.Close the second valve, open after the first valve and the 3rd valve, by the outside tank shell inner inflatable of described the first gas cylinder.
4) open the 4th valve and the 5th valve, close the 6th valve.Starting the internal tank shell of the second vacuum pump inside vacuumizes.
5) in described the second gas cylinder, experimental gas is housed.Close the 5th valve, open after the 4th valve and the 6th valve, by the inside tank shell inner inflatable of described the second gas cylinder.
6) primary side of described pressure regulator access power supply, tests.
The present invention adopts technique scheme, mainly contains following effect:
1) adopt many-sided measure to ensure the accuracy of gas-insulated performance test: by adjustable plate rise fall of electrodes regulating device, to realize the accurate control of pin electrode and plate electrode spacing; The material that the upper cover plate of gas-insulated experimental apparatus for capability inner canister is selected be insulation teflon but not stainless steel has solved floating potential discharge problem.High-voltage conductive rod between gas-insulated experimental apparatus for capability outer tank and inner canister, and high-voltage conductive rod is connected wire tie point with high pressure is all encapsulated in insulation sleeve, avoids being exposed on the external with the bare metal of high pressure, and in outer tank, is filled with the SF of excellent insulation performance
6gas, these two kinds of measures can suppress described outer tank inside, inner canister outside due to the shelf depreciation that metal protrusion causes, the interference of avoiding the local discharge signal of inner canister outside to gather ultra-high frequency signal; Ultra-high frequency antenna is placed in to outer tank inside, the interference of having avoided extraneous low frequency signal to gather ultra-high frequency signal.
2) gas-insulated experimental apparatus for capability outer tank is withstand voltage is 0.3MPa, and independent inner canister is withstand voltage is 0.4MPa, and installs under vacuum or high pressure conditions, in 200 hours, can keep good impermeability.Adopt the mode of the nested inner canister of outer tank, air pressure in outer tank can be offset the air pressure of part inner canister, improve the withstand voltage level of inner canister, in the time that outer tank is filled with 0.2MPa gas, inner canister is withstand voltage has reached 0.6MPa, and the air pressure that is filled with gas in view of true GIS is 0.4～0.6MPa, and this gas-insulated experimental apparatus for capability is the insulating property of stimulated replacement gas in true GIS effectively, with SF6 gas comparison under same condition, for place of gas substitutes SF
6foundation is provided.
3) outer tank of gas-insulated experimental apparatus for capability and inner canister are detachable, in some low-pressure experiments, can directly use inner canister to test.Metal protrusion defect in pin-plate electrode Reality simulation GIS in inner canister, can be replaced with pin-plate electrode other multiple electrode models, free metal particle defects, insulator contamination defect and insulator void defects in Reality simulation GIS.Electrode model matches with high-voltage conductive rod, low voltage conductive bar corresponding in inner canister, simple and convenient when replacing.
4) transparent effect of gas-insulated experimental apparatus for capability outer tank cover plate is good, can clearly observe the experimental phenomena in inner canister.
5) can, by gas-insulated experimental apparatus for capability of the present invention for gas-insulated performance test under direct current and surge voltage, only need to change corresponding power generator.
The present invention is widely used in the insulating property experiment of high-low pressure insulating gas in various electrical equipments, can be to SF
6the insulating property of place of gas are launched research, for place of gas substitutes SF
6foundation is provided.
Brief description of the drawings
Fig. 1 is the theory diagram of experimental system of the present invention;
Fig. 2 is the structural representation of the gas-insulated experimental apparatus for capability inner canister outer tank of experimental system of the present invention;
Fig. 3 is the gas-insulated experimental apparatus for capability one-piece construction schematic diagram of experimental system of the present invention.
In figure: 1, pressure regulator, 2, halo-free testing transformer, 3, put protective resistance, 4 without office, capacitive divider, 5, gas-insulated experimental apparatus for capability, 6, ultra-high frequency antenna, 7, noninductive detection impedance, 8, coupling capacitance, 9, high-speed figure storage oscilloscope, 10, outer tank fixed head, 11, outer tank shell, 12, outer tank cover plate, 13, high-voltage conducting wires, 14, grading shield, 15, outer tank high-voltage conductive rod, 16, outer tank insulation sleeve, 17, high pressure connects wire, 18, inner canister high-voltage conductive rod, 19, cover plate insulation sleeve, 20, upper cover plate, 21, upper mounted plate, 22, interior tank shell, 23, base, 24, pin electrode, 25, plate electrode, 26, low voltage conductive bar, 27, base insulation sleeve, 28, plate electrode elevation and subsidence regulating device, 29, pillar, 30, back up pad, 31, ground wire, 32, the first connecting duct, 33, first tracheae of keeping forging ahead, 34, the first baro-vacuum gauge, 35, the first valve, 36, the second valve, 37, the 3rd valve, 38, the first vacuum pump, 39, the first gas cylinder, 40, the second connecting duct, 41, second tracheae of keeping forging ahead, 42, the second baro-vacuum gauge, 43, the 4th valve, 44, the 5th valve, 45, the 6th valve, 46, the second vacuum pump, 47, the second gas cylinder.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, only limits to following embodiment but should not be construed the above-mentioned subject area of the present invention.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacements and change, all should be included in protection scope of the present invention.
Embodiment 1:
The present embodiment discloses a kind of insulating gas insulating property experimental system that is applied to electrical equipment, comprises high-tension electricity generating means, measurement mechanism and insulating gas test unit.
Described high-tension electricity generating means comprises pressure regulator 1, halo-free testing transformer 2, puts protective resistance 3 and coupling capacitance 8 without office.The primary side of described pressure regulator 1 is electrically connected with the city of 380V by wire, and the secondary side of described pressure regulator 1 is connected with the primary side of described halo-free testing transformer 2 by cable.Described coupling capacitance 8 has A, two terminals of B.The A terminals series connection of coupling capacitance 8 is put after protective resistance 3 without office, is electrically connected with the high-pressure side of the secondary side of halo-free testing transformer 2.The B terminals of described coupling capacitance 8 are connected after noninductive detection impedance 7, are electrically connected with the low pressure end of the secondary side of halo-free testing transformer 2.The low pressure end ground connection of the secondary side of described halo-free testing transformer 2.
Described measurement mechanism comprises ultra-high frequency antenna 6 and high-speed figure storage oscilloscope 9.Described high-speed figure storage oscilloscope 9 has at least two signal access port, one of them signal access port by signal wire be connected with ultra-high frequency antenna 6, another signal incoming end is connected with the B terminals of coupling capacitance 8.
Described insulating gas test unit comprises outer tank, inner canister, outer tank gas equipment and the inner canister gas equipment of keeping forging ahead of keeping forging ahead:
Described outer tank comprises the outer tank shell 11 that a stainless steel is made.The hollow circuit cylinder cylinder that described outer tank shell 11 is left and right open at both ends, its inside is inner chamber, outside and the environmental exposure of a hollow.With after the outer tank shell of two outer tank cover plate 12 shutoff 11 two ends uncovered, the inside of outer tank shell 11 has impermeability.Outer tank cover plate 12 described in two is made by transparent material.Described ultra-high frequency antenna 6 is arranged on outer tank shell 11 inside, and described signal wire penetrates the sidewall of described outer tank shell 11, the impermeability of assurance device by insulation sleeve.Described signal wire penetrates the sidewall of described outer tank shell 11.The rubber sleeve of described signal wire outer wall wrap insulate, makes it not affect the impermeability of device.The sidewall of described outer tank shell 11 also embeds outer tank high-voltage conductive rod 15, the first connecting duct 32 and the second connecting duct 40.Described outer tank high-voltage conductive rod 15 external insulating sleeves, its one end penetrates outer tank shell 11 inside, other end tank shell 11 outsides that expose outside.Described the first connecting duct 32 and the second connecting duct 40 are all hollow conduits of open at both ends, mouth of pipe tank shell 11 inside, another mouth of pipe tank shell 11 outsides outside outside.
Described inner canister is arranged on the inside of outer tank.Described inner canister comprises an interior tank shell 22 of being made up of transparent material.Described interior tank shell 22 is the hollow circuit cylinder cylinders that upper/lower terminal is uncovered, and its inside is inner chamber, outside and the environmental exposure of a hollow.Referring to accompanying drawing, described interior tank shell 22 be axially perpendicular to surface level, the axially parallel of described outer tank shell 11 is in surface level.Therefore, just in time can observe by the transparent cover plate at outer tank shell 11 two ends the situation of interior tank shell 22 inside.After uncovered employing upper cover plate 20 shutoff in upper end of described interior tank shell 22, uncovered employing base 23 shutoff in lower end, the inside of interior tank shell 22 has impermeability.In embodiment, described upper cover plate 20 and base 23 are all to have certain thickness disk.Described upper cover plate 20 is made up of teflon, and its middle part embeds tank high-voltage conductive rod 18.Described inner canister high-voltage conductive rod 18 penetrates one end connecting needle electrode 24 of interior tank shell 22.It is unsettled that described pin electrode 24 upper ends are connected to inner canister high-voltage conductive rod 18 upper and lower ends.One end that described outer tank high-voltage conductive rod 15 penetrates outer tank shell 11 inside connects wire 17 by high pressure and is connected with inner canister high-voltage conductive rod 18.Expose outside one end of tank shell 11 outsides of described outer tank high-voltage conductive rod 15 is connected with the A terminals of coupling capacitance 8 by high-voltage conducting wires 13.Described base 23 is made up of stainless steel.Elevation and subsidence regulating device 28 is installed in the below of base 23.The upper end of described elevation and subsidence regulating device 28 is lifting shafts.The middle part of base 23 embeds base insulation sleeve 27.The middle part that is disc-shaped base 23 has axial through hole.Described base insulation sleeve 27 is hollow circuit cylinder cylinders that teflon is made, the upper and lower open at both ends of this cylindrical drum, and middle through low voltage conductive bar 26, the outer wall of base insulation sleeve 27 contacts with the hole wall of the axially extending bore of base 23.Described low voltage conductive bar 26 lower ends are connected on described lifting shaft, upper end web joint electrode 25.Base 23 middle parts.Described plate electrode 25 is metal disks, and its upper surface is positioned at the below of pin electrode 24.Start elevation and subsidence regulating device 28, change the height of described lifting shaft, just can adjust the distance between upper surface and the pin electrode 24 of plate electrode 25.A conduit of described base 23 inner embeddings.A mouth of pipe of described conduit outside tank shell 11 inside, another mouth of pipe is connected with the second connecting duct 40.
The described outer tank gas equipment of keeping forging ahead comprises the first keep forging ahead tracheae 33, the first baro-vacuum gauge 34, the first valve 35, the second valve 36, the 3rd valve 37, the first vacuum pump 38 and the first gas cylinder 39.Described first tracheae 33 of keeping forging ahead is three-way pipelines, and its three mouths of pipe are installed respectively the first valve 35, the second valve 36 and the 3rd valve 37.Keeping forging ahead in described first valve 35 one end and first, tracheae 33 is connected, the other end is connected with described the first connecting duct 32 by pipeline.Keeping forging ahead in described second valve 36 one end and first, tracheae 33 is connected, the other end is connected with the air intake opening of the first vacuum pump 38.Keeping forging ahead in described the 3rd valve 37 one end and first, tracheae 33 is connected, the other end is connected with the gas outlet of the first gas cylinder 39.Connect on the pipeline of described the first valve 35 and described the first connecting duct 32 the first baro-vacuum gauge 34 is installed.
The described inner canister gas equipment of keeping forging ahead comprises the second keep forging ahead tracheae 41, the second baro-vacuum gauge 42, the 4th valve 43, the 5th valve 44, the 6th valve 45, the second vacuum pump 46 and the second gas cylinder 47.Described second tracheae 41 of keeping forging ahead is three-way pipelines, and its three mouths of pipe are installed respectively the 4th valve 43, the 5th valve 44 and the 6th valve 45.Keeping forging ahead in described the 4th valve 43 one end and second, tracheae 41 is connected, the other end is connected with described the second connecting duct 40 by pipeline.Keeping forging ahead in described the 5th valve 44 one end and second, tracheae 41 is connected, the other end is connected with the air intake opening of the second vacuum pump 46.Keeping forging ahead in described the 6th valve 45 one end and second, tracheae 41 is connected, the other end is connected with the gas outlet of the second gas cylinder 47.Connect on the pipeline of described the 4th valve 43 and described the second connecting duct 40 the second vacuum pump 46 is installed.
In embodiment, in described high-tension electricity generating means, also comprise capacitive divider 4, one end of described capacitive divider 4 is connected with the A terminals of coupling capacitance 8, the other end is connected altogether with the low pressure end of the secondary side of halo-free testing transformer 2.
As preferably, the junction overcoat grading shield 14 of described outer tank high-voltage conductive rod 15 and high-voltage conducting wires 13.
Embodiment 2:
The present embodiment discloses a kind of insulating gas insulating property experimental system that is applied to electrical equipment, and its primary structure is with embodiment 1.
In the present embodiment, the primary side of described pressure regulator 1 is electrically connected with the city of 380V by wire, described pressure regulator 1 secondary side is by cable and the described commercial product of halo-free testing transformer 2() primary side is connected, the rated capacity of described halo-free testing transformer 2 is 60kVA, high-low pressure winding no-load voltage ratio is 60kV/400V, and rated current is 1.0A/150A.The secondary side high-pressure side of described halo-free testing transformer 2 is put protective resistance 3 without office and is connected with described by cable, so that circuit is carried out to current-limiting protection.
In the outer tank part of the present embodiment, outer tank shell 11 is cylindrical shape stainless steel, described outer tank fixed head 10 materials are stainless steel, circular, be welded on the two ends of described outer tank shell 11, mate with described outer tank shell 11, described outer tank cover plate 12 materials are the good cylindrical organic glass of transparent effect, in order to observe described outer tank closed test phenomenon.The shape of described outer tank fixed head 10 and outer tank cover plate 12 matches, and all contains equally distributed 6～10 screws that match, and realizes the fastening of described outer tank fixed head 10 and outer tank cover plate 12 by bolt.Between described outer tank fixed head 10 and outer tank cover plate 12, ensure the impermeability of outer tank by conventional mosaic mode and Sealing Technology.Described outer tank shell 11 external diameters are 450～550mm, thickness 15～20mm, length 650～750mm, described outer tank fixed head 10 and outer tank cover plate 12 external diameters are 500～600mm, described outer tank fixed head 10 thickness are 15～20mm, described outer tank cover plate 12 thickness are 20～25mm, and described screwhole diameter is 25～30mm.Directly over described outer tank shell, center arranges the through hole of one 40～50mm, embeds described outer tank insulation sleeve 16, and described outer tank high-voltage conductive rod 15 embeds the through hole of 8～12mm of described outer tank insulation sleeve 16 centers settings.Described outer tank high-voltage conductive rod 15 upper ends connect high-voltage conducting wires 13, and described grading shield 14 is enclosed within the junction of described outer tank high-voltage conductive rod 15 upper ends and described high-voltage conducting wires, suppresses the generation of shelf depreciation.
In the inner canister part of the present embodiment, described interior tank shell 22 materials are the good cylindrical shape organic glass of transparent effect, to observe the experimental phenomena of tank interior.Described interior tank shell 22 embeds in described base 23 by sealing tightening technology, and described base 23 materials are stainless steel, and center arranges a through hole, embeds described base insulation sleeve 27, and at 4 equally distributed screws of arranged outside.Described upper mounted plate 21 materials are stainless steel, are embedded in described interior tank shell 22 tops by sealing tightening technology, match with described interior tank shell 22.Described upper cover plate 20 materials are cylindrical teflon, shape and described upper mounted plate 21 form fit.Described upper mounted plate 21 and upper cover plate 20 all contain equally distributed 6～10 screws that match, and realize being fastenedly connected of upper mounted plate 21 and upper cover plate 20 by bolt.Between described upper mounted plate 21 and upper cover plate 20, ensure the impermeability of inner canister by conventional mosaic mode and Sealing Technology.Described interior tank shell 22 external diameters are 280～320mm, thickness 25～30mm, height 180～220mm, described upper cover plate 20 external diameters are 330～370mm, thickness 25～30mm, and described base external diameter is 340～380mm, thickness is 20～25mm, and described screwhole diameter is 20～25mm.Described cover plate insulation sleeve 19 embeds the through hole that reserved aperture, upper cover plate 20 centers is 40～50mm, described inner canister high-voltage conductive rod 18 embeds the through hole that described reserved aperture, cover plate insulation sleeve 19 centers is 8～12mm, and described inner canister high-voltage conductive rod 18 lower ends and described pin electrode 24 are fixed.Described low voltage conductive bar 26 embeds described base insulation sleeve 27, the affixed described plate electrode 25 in described low voltage conductive bar 26 upper ends, lower end connects described plate electrode elevation and subsidence regulating device 28, and described plate electrode elevation and subsidence regulating device 28 lower ends are through the through hole at described back up pad 30 centers.Described back up pad 30 is placed in described outer tank inside center position, and 4 equally distributed screws are set, and matches with 4 screws of described base 23, realizes the fastening of described back up pad 30 and described base 23 by pillar 29.
In the present embodiment, described pin electrode 24 and plate electrode 25 materials are brass, and described pin electrode 24 upper ends and described inner canister high-voltage conductive rod 18 lower ends are affixed by screw thread, length is 40～60mm, wherein, length of needlepoint is 4～6mm, needle tip radius-of-curvature 0.2～0.4mm.Described plate electrode 25 downside centers arrange a screw, and affixed by screw thread with described low voltage conductive bar 26 upper ends, described plate electrode 25 diameters are 80～100mm, thickness 8～12mm, edge radius-of-curvature 4～6mm.Distance between described pin electrode 24 and plate electrode 25 regulates by described plate electrode elevation and subsidence regulating device.
Described plate electrode elevation and subsidence regulating device 28 materials are brass, and upper end (being telescopic end) connects described low voltage conductive bar 27, and lower end is connected with outer tank shell 11 by exposed copper ground wire 31.By regulating the knob of described plate electrode elevation and subsidence regulating device 28 lower ends, control described plate electrode 25 and move up and down, realize the distance adjustment between described pin electrode 24 and plate electrode 25.Knob often revolves and turns around, and described plate electrode 25 rises or decline 1mm.
Described insulation sleeve material is all teflon, and described high-voltage conductive rod and low voltage conductive bar material are all brass.Described outer tank insulation sleeve 16 external diameters are 40～50mm, length 100～120mm, and center arranges a through hole, the nested described outer tank high-voltage conductive rod 15 matching, described outer tank high-voltage conductive rod 15 diameter 8～12mm, length 150～180mm.Described cover plate insulation sleeve 19 external diameters are 40～50mm, length 50～60mm, and center arranges a through hole, the nested described inner canister high-voltage conductive rod 18 matching, described inner canister high-voltage conductive rod 18 diameter 8～12mm, length 100～120mm.Described base insulation sleeve 27 external diameters are 40～50mm, length 40～50mm, and center arranges a through hole, the nested described low voltage conductive bar matching 26, described low voltage conductive bar 26 diameter 8～12mm, length 100～120mm.
Described inner canister entirety is enclosed within described outer tank, described inner canister connects wire 17 by high pressure and is connected with described outer tank with ground wire 31, described high pressure connects wire 17 two ends and connects respectively described inner canister high-voltage conductive rod 18 and outer tank high-voltage conductive rod 15, described ground wire 31 one end are connected with described plate electrode elevation and subsidence regulating device 28, one end is welded on described outer tank shell 11, described outer tank shell 11 ground connection.
In the present embodiment, described first gets tracheae 33 and second gets the high temperature resistant and corrosion resistant polyfluortetraethylene pipe that tracheae 41 is 1～8mm for commercial external diameter.
Described ultra-high frequency antenna 6 is the commercial external small-sized accurate TEM electromagnetic horn sensor of one, be placed in the inside of described gas-insulated performance test apparatus 5 outer tanks, the outside of described gas-insulated performance test apparatus 5 inner canisters, greatly reduce outer signals and disturb, the degree of discharge of insulating gas in the inner canister described in having reacted more accurately.Described ultra-high frequency antenna 6 is connected with the signal access port of described high-speed figure storage oscilloscope 9 by signal cable line, in order to monitor the ultra-high frequency signal of insulating gas in described inner canister.
Described high-speed figure storage oscilloscope 9 is commercial product, sampling rate is 20GS/s, analog bandwidth is 1GHz, memory length is 48MB, be connected with noninductive detection impedance 7 series connection points with described ultra-high frequency antenna and described coupling capacitance 8 by signal cable line, gather and analyze in order to the ultra-high frequency signal to shelf depreciation and pulse signal.
Embodiment 3
Be applied to an insulating gas insulating property experimental system for electrical equipment, with embodiment 1 or 2, the external diameter of the described outer tank shell of gas-insulated experimental apparatus for capability is 450mm, and thickness is 15mm, and length is 650mm.Described outer tank fixed head external diameter is 500mm, and thickness is 15mm, and described outer tank cover plate external diameter is 500mm, and thickness is 20mm, and the screw external diameter on described outer tank fixed head and outer tank cover plate is 25mm.Described outer tank insulation sleeve external diameter is 40mm, and length is 100mm, and described outer tank high-voltage conductive rod external diameter is 8mm, and length is 150mm.In described gas-insulated experimental apparatus for capability, the external diameter of tank shell is 280mm, and thickness is 20mm, is highly 180mm.The external diameter of described inner canister upper mounted plate is 330mm, and thickness is 20mm, and described upper cover plate external diameter is 330mm, and thickness is 25mm, and the screw external diameter on described upper mounted plate and upper cover plate is 20mm.Described base external diameter is 330mm, and thickness is 20mm.Described upper cover plate insulation sleeve external diameter is 40mm, and length is 50mm, and described inner canister high-voltage conductive rod external diameter is 8mm, and length is 100mm.Described base insulation sleeve external diameter is 40mm, and length is 40mm, and described low voltage conductive bar external diameter is 8mm, and length is 100mm.Described pin electrode length is 40mm, and length of needlepoint is 4mm, and needle tip radius-of-curvature is 0.2mm.Described plate electrode external diameter is 80mm, and thickness is 8mm, and edge radius-of-curvature is 4mm.Described first to get tracheae external diameter be 6mm, and described second to get tracheae be 3mm at the external diameter of described outer tank interior section, is 6mm at the external diameter of described outer tank exterior section.
Embodiment 4
Be applied to an insulating gas insulating property experimental system for electrical equipment, with embodiment 1,2 or 3.The external diameter of the described outer tank shell of gas-insulated experimental apparatus for capability is 550mm, and thickness is 20mm, and length is 750mm.Described outer tank fixed head external diameter is 600mm, and thickness is 20mm, and described outer tank cover plate external diameter is 600mm, and thickness is 25mm, and the screw external diameter on described outer tank fixed head and outer tank cover plate is 30mm.Described outer tank insulation sleeve external diameter is 50mm, and length is 120mm, and described outer tank high-voltage conductive rod external diameter is 12mm, and length is 180mm.In described gas-insulated experimental apparatus for capability, the external diameter of tank shell is 320mm, and thickness is 30mm, is highly 220mm.The external diameter of described inner canister upper mounted plate is 370mm, and thickness is 25mm, and described upper cover plate external diameter is 370mm, and thickness is 30mm, and the screw external diameter on described upper mounted plate and upper cover plate is 25mm.Described base external diameter is 370mm, and thickness is 25mm.Described upper cover plate insulation sleeve external diameter is 40mm, and length is 60mm, and described inner canister high-voltage conductive rod external diameter is 12mm, and length is 120mm.Described base insulation sleeve external diameter is 50mm, and length is 50mm, and described low voltage conductive bar external diameter is 12mm, and length is 120mm.Described pin electrode length is 60mm, and length of needlepoint is 6mm, and needle tip radius-of-curvature is 0.4mm.Described plate electrode external diameter is 100mm, and thickness is 10mm, and edge radius-of-curvature is 5mm.Described first to get tracheae external diameter be 8mm, and described second to get tracheae be 3mm at the external diameter of described outer tank interior section, is 8mm at the external diameter of described outer tank exterior section.
Embodiment 5
The present embodiment discloses the method that the insulating gas insulating property experimental system that is applied to electrical equipment described in a kind of employing 1～4 any embodiment is tested,
Comprise the following steps:
1) install the various piece of experimental system, check the impermeability of inner and outer tank, check whether reliable ground of earth point.The primary side of described pressure regulator 1 does not access power supply.
2) open the first valve 35 and the second valve 36, close the 3rd valve 37, start the first vacuum pump 38 external tank shell 11 inside and vacuumize.Until the first baro-vacuum gauge 34 registrations while being-0.005～-0.01MPa, stop bleeding.
3) in described the first gas cylinder 39, SF is housed
6gas.Close the second valve 36, open after the first valve 35 and the 3rd valve 37, by outside tank shell 11 inner inflatable of described the first gas cylinder 39.Make outer tank shell 11 inside there is 1 atmospheric pressure.
4) open the 4th valve 43 and the 5th valve 44, close the 6th valve 45.Starting the second vacuum pump 46 vacuumizes interior tank shell 22 inside.Until the second baro-vacuum gauge 42 registrations while being-0.005～-0.01MPa, stop bleeding.
5) in described the second gas cylinder 47, experimental gas is housed.Close the 5th valve 44, open after the 4th valve 43 and the 6th valve 45, by inside tank shell 22 inner inflatable of described the second gas cylinder 47.Make interior tank shell 22 inside there is 1 atmospheric pressure.
6) primary side of described pressure regulator 1 access power supply, tests.
Embodiment 6
The present embodiment discloses the method that the insulating gas insulating property experimental system that is applied to electrical equipment described in a kind of employing 1～4 any embodiment is tested, and its main step is with embodiment 5.
An insulating gas insulating property experimental technique that is applied to electrical equipment, concrete steps are as follows:
1) Preparatory work of experiment
1-1) checking experiment wiring
Carry out high-potting, must ensure safety.Before experiment, carefully check wiring, guarantee the correctness of connection line, especially will note the ground wire reliable ground of experimental provision.
1-2) clean experimental provision and ultra-high frequency antenna is installed
Hang up ground rod at the described series connection point without shelf depreciation protective resistance 7 and capacitive divider 8; take the outer tank cover plate 12 of described gas-insulated experimental apparatus for capability 5 outer tank one sides apart; from the described inner canister of the inner taking-up of described outer tank; take the upper cover plate 20 of described inner canister apart; clean described inner canister upper cover plate 20 inwalls, base 23 inwalls, interior tank shell 22 inwalls, pin electrode 24, plate electrode 25, inner canister high-voltage conductive rod 18, low voltage conductive bar 26, cover plate insulation sleeve 19 and base insulation sleeve 27 with anhydrous alcohol; remove impurity, ensure the accuracy of experiment.
After drying up with hair-dryer, affixed described inner canister upper cover plate 20 and upper mounted plate 21, regulate described plate electrode elevation and subsidence regulating device 28, makes described pin electrode 24 and the spacing of plate electrode 25 in requirement of experiment, spacing adjustable extent 0～45mm, more described inner canister is put back to described outer tank inside.In described outer tank inside, ultra-high frequency antenna 6 is placed in the relevant position of described inner canister outside, connects described high-speed figure storage oscilloscope 9 by signal cable line.Last affixed described outer tank cover plate 12 and outer tank fixed head 10.
1-3) the impermeability of detection gas-insulated experimental apparatus for capability
Open the first valve 35, the second valve 36, close the 3rd valve 37, open the 4th valve 43, the 5th valve 44, close the 6th valve 45, respectively described gas-insulated experimental apparatus for capability 5 outer tanks and inner canister are vacuumized with the first described vacuum pump 38 and the second vacuum pump 46, in the time that the first described baro-vacuum gauge 34 and the second baro-vacuum gauge 42 registrations are all-0.005～-0.01MPa, stop bleeding, leave standstill 10～12 hours, observe described the first baro-vacuum gauge 34 and the second baro-vacuum gauge 42 registrations, if without significant change, illustrate that described gas-insulated experimental apparatus for capability 5 vacuum-tightnesses are good, if described the first baro-vacuum gauge 34 or the second baro-vacuum gauge 42 registration generation significant changes, carry out the detection of vacuum-tightness again after related device is overhauled.Open the first valve 35, the 3rd valve 37, close the second valve 36, open the 4th valve 43, the 6th valve 45, close the 5th valve 44, be filled with successively the N of 0.3MPa, 0.5MPa with the first described gas cylinder 39 and the second gas cylinder 47 to described gas-insulated experimental apparatus for capability 5 outer tanks and inner canister
2, leave standstill 10～12 hours, observe described the first baro-vacuum gauge 34 and the second baro-vacuum gauge 42 registrations, if without significant change, illustrate that described gas-insulated experimental apparatus for capability 5 high pressure impermeability are good; If described the first baro-vacuum gauge 34 or the second baro-vacuum gauge 42 registration generation significant changes, carry out the bubble-tight detection of high pressure after related device is overhauled again.
1-4) be filled with experimental gas to gas-insulated experimental apparatus for capability
Open the first valve 35, the second valve 36, close the 3rd valve 37, described gas-insulated experimental apparatus for capability 5 outer tanks are vacuumized with the first described vacuum pump 38, in the time that the first described baro-vacuum gauge 34 registrations are-0.005～-0.01MPa, stop bleeding.Close the second valve 36, open the 3rd valve 37, with described SF
6gas cylinder 39 is filled with the SF of certain pressure intensity to described outer tank
6gas, SF
6the insulating property that gas is good can suppress the interference to experiment of the shelf depreciation that described outer tank inside, inner canister outside causes due to metal protrusion.Open the 4th valve 43, the 5th valve 44, close the 6th valve 45, described gas-insulated experimental apparatus for capability 5 inner canisters are vacuumized with the second described vacuum pump 46, close the 5th valve 44, open the 6th valve 45, be filled with the gas that will carry out insulating property experiment of 1 air pressure left and right with described gas cylinder 47 to described inner canister, described inner canister is carried out to gas washing, reduce experimental error, gas scrubbing repeats 2～3 times.The last experimental gas that is filled with again certain pressure intensity to described inner canister.
2) carry out gas-insulated performance test
2-1) measure partial discharge inception voltage
The 1st) after step completes, ground rod is taken outside safe distance, regulate described pressure regulator 1, slowly rising experimental voltage, and respectively the signal cable line that connects described ultra-high frequency antenna 6 and noninductive detection impedance 7 is connected to two passages of described oscillograph 9, observe the waveform of the shelf depreciation electromagnetic signal receiving by described ultra-high frequency antenna 6 on described oscillograph 9 and the pulse signal gathering by described noninductive detection impedance 7, in the time there is local discharge signal, record the now output voltage of described pressure regulator 1, be designated as U
st, the partial discharge inception voltage that this voltage is insulating gas.
2-2) produce stable shelf depreciation and gather local discharge signal
Continue to regulate described pressure regulator 1, the experimental voltage that slowly raises, to experimental voltage be 2-1) U of pacing amount
st1.2～1.5 times, between the pin-plate electrode in described gas-insulated experimental apparatus for capability 5, produce stable shelf depreciation, record is the output voltage of described pressure regulator 1 now, and record respectively two electromagnetic signal waveform and pulse signal waveforms on passage with described high-speed figure storage oscilloscope 9, and Wave data.
2-3) breakdown test
Continue to regulate described pressure regulator 1, slowly rising experimental voltage, the output voltage of the pressure regulator 1 described in keeping one's eyes open, and the experimental phenomena in described gas-insulated experimental apparatus for capability 5 is observed in attention, in the time that described pressure regulator 1 output voltage is undergone mutation, record the now output voltage of pressure regulator 1, be designated as U
b, the voltage breakdown that this voltage is insulating gas.
3) experiment power cut-off
First hang ground rod, described gas-insulated experimental apparatus for capability 5 inner canisters are vacuumized with the second described vacuum pump 46, and be filled with N
2carry out gas washing, gas washing repeats 2～3 times, prevents in described inner canister because testing the corrosion of the corrosive gas decomposing to described inner canister.Described gas-insulated experimental apparatus for capability 5 outer tanks are vacuumized with the first described vacuum pump 38, and be filled with the air of 1 air pressure.
Embodiment 6
The insulating gas air pressure of regulation experiment carries out gas-insulated performance test again:
At embodiment 5 the 2nd) after step completes, not yet carry out the 3rd) when the work of step, the inner canister of gas-insulated experimental apparatus for capability 5 is vacuumized with the second described vacuum pump 46, described inner canister is carried out to gas washing, gas washing repeats 2～3 times, then is filled with the insulating gas of certain air pressure to described inner canister.Repeat the 2nd) step, records the insulating property experimental data of insulating gas under this air pressure.
So repeat experiment, can obtain the insulating property experimental data of insulating gas under different air pressure, same electrode separation.
Embodiment 7
Adjust the spacing of pin-plate electrode and carry out again gas-insulated performance test:
At embodiment 5 the 2nd) after step completes, not yet carry out the 3rd) when the work of step, respectively the inner and outer tank of described gas-insulated experimental apparatus for capability 5 are vacuumized, and pass into the air of 1 air pressure.Take the outer tank cover plate 12 of described outer tank one side apart, by regulating described plate electrode elevation and subsidence regulating device 28, controlling described pin electrode 24 and the spacing of plate electrode 25 is required fixed value, finally by the outer tank cover plate 12 of affixed described outer tank one side of screw.Repetition first-4. walk (2) step, records the insulating property experimental data of insulating gas under this electrode separation.So repeat experiment, can obtain the insulating property experimental data of insulating gas under same air pressure, Different electrodes spacing.
Embodiment 8
Electric discharge decomposition components is analyzed:
At embodiment 5 2-2) or 2-3) after step completes, according to requirement of experiment collection and analyze shelf depreciation decomposition components or disruptive discharge decomposition components.The collection of the decomposition components of first discharging, described pressure regulator registration is reduced to 0, hang ground rod, close the 4th valve 43 and the 6th valve 45, open the 5th valve 44, open the second described vacuum pump 46, by the 4th valve 43, residual gas between the 5th valve 44 and the 6th valve 45 is emptying, close the 5th valve 44, close described the second vacuum pump 46, second tracheae of keeping forging ahead being connected with described the second vacuum pump 46 is connected to gas production bag, open successively the 4th valve 43, the 5th valve 44, gather the electric discharge decomposition components of certain content, then close the 4th valve 43, the 5th valve 44.Finally use described gas chromatograph-mass spectrometer that the electric discharge decomposition components collecting is analyzed, probe into the relation of electric discharge decomposition components and discharge time, the severe degree of discharging etc., for the shelf depreciation decomposition mechanism of different insulative gas and the research of pattern-recognition lay the foundation.
Claims (4)
1. the insulating gas insulating property experimental system that is applied to electrical equipment, is characterized in that:
Comprise high-tension electricity generating means, measurement mechanism and insulating gas test unit;
Described high-tension electricity generating means comprises pressure regulator (1), halo-free testing transformer (2), puts protective resistance (3) and coupling capacitance (8) without office; The primary side of described pressure regulator (1) is electrically connected with the city of 380V by wire, and the secondary side of described pressure regulator (1) is connected with the primary side of described halo-free testing transformer (2) by cable; Described coupling capacitance (8) has A, two terminals of B; The A terminals series connection of coupling capacitance (8) is put after protective resistance (3) without office, is connected with the high-pressure side of the secondary side of halo-free testing transformer (2); The B terminals of described coupling capacitance (8) are connected after noninductive detection impedance (7), are connected with the low pressure end of the secondary side of halo-free testing transformer (2); The low pressure end ground connection of the secondary side of described halo-free testing transformer (2);
Described measurement mechanism comprises ultra-high frequency antenna (6), high-speed figure storage oscilloscope (9) and gas chromatograph-mass spectrometer; Described high-speed figure storage oscilloscope (9) has at least two signal access port, one of them signal access port by signal wire be connected with ultra-high frequency antenna (6), another signal incoming end is connected with the B terminals of coupling capacitance (8);
Described insulating gas test unit comprises outer tank, inner canister, outer tank gas equipment and the inner canister gas equipment of keeping forging ahead of keeping forging ahead:
Described outer tank comprises the outer tank shell (11) that a stainless steel is made; Described outer tank shell (11) is the hollow circuit cylinder cylinder of a left and right open at both ends; With after the outer tank shell (11) of two outer tank cover plates (12) shutoff two ends uncovered, the inside of outer tank shell (11) has impermeability; Outer tank cover plate (12) described in two is made by transparent material; Described ultra-high frequency antenna (6) is arranged on outer tank shell (11) inside, and described signal wire penetrates the sidewall of described outer tank shell (11); The sidewall of described outer tank shell (11) also embeds outer tank high-voltage conductive rod (15), the first connecting duct (32) and the second connecting duct (40);
Described inner canister is arranged on the inside of outer tank; Described inner canister comprises an interior tank shell (22) of being made up of transparent material; Described interior tank shell (22) is a hollow circuit cylinder cylinder that upper/lower terminal is uncovered; After the uncovered employing upper cover plate in upper end (20) shutoff of described interior tank shell (22), the uncovered employing base in lower end (23) shutoff, the inside of interior tank shell (22) has impermeability; Described upper cover plate (20) is made up of teflon, and its middle part embeds tank high-voltage conductive rod (18); Described inner canister high-voltage conductive rod (18) penetrates one end connecting needle electrode (24) of interior tank shell (22); It is unsettled that described pin electrode (24) upper end is connected to inner canister high-voltage conductive rod (18) upper and lower end; Described outer tank high-voltage conductive rod (15) penetrates the inner one end of outer tank shell (11) and connects wire (17) by high pressure and be connected with inner canister high-voltage conductive rod (18); Described outer tank high-voltage conductive rod (15) the outside one end of tank shell (11) that exposes outside is connected with the A terminals of coupling capacitance (8) by high-voltage conducting wires (13); Described base (23) is made up of stainless steel; Elevation and subsidence regulating device (28) is installed in the below of base (23); The upper end of described elevation and subsidence regulating device (28) is a lifting shaft; The middle part of base (23) embeds base insulation sleeve (27); Described base insulation sleeve (27) is the hollow circuit cylinder cylinder that teflon is made, and passes low voltage conductive bar (26) in this cylindrical drum; Described low voltage conductive bar (26) lower end is connected on described lifting shaft, upper end web joint electrode (25); Described plate electrode (25) is metal disk, and its upper surface is positioned at the below of pin electrode (24); Described base (23) embeds a conduit; A mouth of pipe of described conduit outside tank shell (11) inside, another mouth of pipe is connected with the second connecting duct (40);
The described outer tank gas equipment of keeping forging ahead comprises the first keep forging ahead tracheae (33), the first baro-vacuum gauge (34), the first valve (35), the second valve (36), the 3rd valve (37), the first vacuum pump (38) and the first gas cylinder (39); Described first tracheae (33) of keeping forging ahead is a three-way pipeline, and its three mouths of pipe are installed respectively the first valve (35), the second valve (36) and the 3rd valve (37); Keeping forging ahead in described the first valve (35) one end and first, tracheae (33) is connected, the other end is connected with described the first connecting duct (32) by pipeline; Keeping forging ahead in described the second valve (36) one end and first, tracheae (33) is connected, the other end is connected with the air intake opening of the first vacuum pump (38); Keeping forging ahead in described the 3rd valve (37) one end and first, tracheae (33) is connected, the other end is connected with the gas outlet of the first gas cylinder (39); Connect on the pipeline of described the first valve (35) and described the first connecting duct (32) the first baro-vacuum gauge (34) is installed;
The described inner canister gas equipment of keeping forging ahead comprises the second keep forging ahead tracheae (41), the second baro-vacuum gauge (42), the 4th valve (43), the 5th valve (44), the 6th valve (45), the second vacuum pump (46) and the second gas cylinder (47); Described second tracheae (41) of keeping forging ahead is a three-way pipeline, and its three mouths of pipe are installed respectively the 4th valve (43), the 5th valve (44) and the 6th valve (45); Keeping forging ahead in described the 4th valve (43) one end and second, tracheae (41) is connected, the other end is connected with described the second connecting duct (40) by pipeline; Keeping forging ahead in described the 5th valve (44) one end and second, tracheae (41) is connected, the other end is connected with the air intake opening of the second vacuum pump (46); Keeping forging ahead in described the 6th valve (45) one end and second, tracheae (41) is connected, the other end is connected with the gas outlet of the second gas cylinder (47); Connect on the pipeline of described the 4th valve (43) and described the second connecting duct (40) the second vacuum pump (46) is installed.
2. the insulating gas insulating property experimental system that is applied to electrical equipment according to claim 1, it is characterized in that: in described high-tension electricity generating means, also comprise capacitive divider (4), one end of described capacitive divider (4) is connected with the A terminals of coupling capacitance (8), the other end is connected altogether with the low pressure end of the secondary side of halo-free testing transformer (2).
3. the insulating gas insulating property experimental system that is applied to electrical equipment according to claim 1, is characterized in that: the junction overcoat grading shield (14) of described outer tank high-voltage conductive rod (15) and high-voltage conducting wires (13).
4. the method that the insulating gas insulating property experimental system that is applied to electrical equipment described in employing 1～3 any one claim is tested, is characterized in that, comprises the following steps:
1) install the various piece of experimental system, check the impermeability of inner and outer tank, check whether reliable ground of earth point; The primary side of described pressure regulator (1) and power supply disconnect;
2) open the first valve (35) and the second valve (36), close the 3rd valve (37), start the first vacuum pump (38) and externally vacuumize tank shell (11) inside;
3) in described the first gas cylinder (39), SF is housed
6gas; Close the second valve (36), open after the first valve (35) and the 3rd valve (37), by outwards tank shell (11) inner inflatable of described the first gas cylinder (39);
4) open the 4th valve (43) and the 5th valve (44), close the 6th valve (45); Starting the second vacuum pump (46) internally vacuumizes tank shell (22) inside;
5) in described the second gas cylinder (47), experimental gas is housed; Close the 5th valve (44), open after the 4th valve (43) and the 6th valve (45), by inwardly tank shell (22) inner inflatable of described the second gas cylinder (47);
6) primary side of described pressure regulator (1) access power supply, tests.
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