CN110297164A - Sulfur hexafluoride decomposition product extraction element and system based on different faults type - Google Patents
Sulfur hexafluoride decomposition product extraction element and system based on different faults type Download PDFInfo
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- CN110297164A CN110297164A CN201910511979.1A CN201910511979A CN110297164A CN 110297164 A CN110297164 A CN 110297164A CN 201910511979 A CN201910511979 A CN 201910511979A CN 110297164 A CN110297164 A CN 110297164A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/20—Preparation of articles or specimens to facilitate testing
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Abstract
The present invention relates to the protections of power equipment and fault diagnosis technology field; more particularly to the sulfur hexafluoride decomposition product extraction element based on different faults type, including, test chamber; it is wherein connected with high pressure on an electrode including the cavity for placing a pair of discharge electrodes, in cavity and introduces component；Negative pressure generating device is connected with test chamber, for vacuumizing to cavity；SF6Gas source is connect with test chamber, for injecting SF into cavity6Gas；Heating device is arranged in SF6Between gas source and test chamber, for the SF to injection cavity6Gas is heated；And decomposition product collecting, it is connected with test chamber；The different faults type includes partial discharges fault and overheating fault；SF can be obtained6Decomposition product of the gas medium under different discharge defects and Superheated steam drier achievees the purpose that the state of insulation inside accurate judgement equipment to obtain the content and proportionate relationship of the decomposition product under different discharge defects and Superheated steam drier.
Description
Technical field
The present invention relates to the protections of power equipment and fault diagnosis technology field, more particularly to based on different faults type
Sulfur hexafluoride decomposition product extraction element and system, for simulating SF6Air insulating device occur simultaneously partial discharges fault and
The case where overheating fault, and extraction and analysis obtains SF6Gas decomposition product, thus to improve SF6Resolution theory and electrical equipment
Chemical diagnosis technology provides corresponding experimental basis.
Background technique
SF6Gas as one of most important dielectric of power industry, be widely used in high-voltage circuitbreaker, GIS,
The high-tension apparatuses such as GIL, mutual inductor.Because electric fields uniform degree is to SF6The influence of gas-insulated performance is big more than the influence to air,
Lead to SF6Requirement of the air insulating device to electric field strength uniformity is high.But as the miniaturization of equipment and built-in electrical insulation are empty
Between densification, the work field strength in such high-tension apparatus is often very high.
On the one hand, since the assembly technology of equipment, the selection of manufacture material, transport and installation etc. are easily asked
Topic, makes may have various defects inside equipment, and such as equipment hot-spot, built-in loosening, there are metal tip, insulation along face
Defect, insulative air gap defect etc.；In the process of running, insulating properties is in electricity, heat, mechanical and environment for another aspect transformer equipment
Etc. can gradually degrade under the collective effect of factors, cause the mechanical strength or decreasing insulating of insulation system.With operation year
The increase of limit, the defect that above-mentioned two aspect is formed can gradually develop seriously, in the extraneous inducement such as overvoltage, heavy load or operation
Under, insulation breakdown or flashover will be caused.And the SF in high-tension apparatus6Gas medium is because of partial discharge, overheat, micro- water and disruptive discharge
When equal Hidden faults or catastrophic discontinuityfailure, it may occur that decompose and destroy, complicated chemical reaction occurs, generates new product.
Under different faults type, SF6Decomposition product (new product) content and proportionate relationship there is also differences.
Accordingly, it is desirable to provide a kind of SF based on different faults type6Decomposition product extraction element, will pass through analysis SF6
The content and proportionate relationship of decomposition product of the gas medium under different discharge defects and Superheated steam drier, reach accurate judgement and set
The purpose of standby internal state of insulation.
Summary of the invention
The technical problem to be solved by the present invention is to how under different faults type obtain SF6Decomposition product, provide
SF based on different faults type6Decomposition product extraction element can obtain SF6Gas medium is in different discharge defects and excessively hot
Decomposition product under failure is reached inside accurate judgement equipment with will pass through the content and proportionate relationship of analysis decomposition product
The purpose of state of insulation.
To achieve the above object, the present invention is achieved by the following technical programs: the hexafluoro based on different faults type
Change sulphur decomposition product extraction element, including, test chamber, including the cavity for placing a pair of discharge electrodes, in cavity its
In be connected with high pressure on an electrode and introduce component；Negative pressure generating device is connected with test chamber, for vacuumizing to cavity；
SF6Gas source is connect with test chamber, for injecting SF into cavity6Gas；Heating device is arranged in SF6Gas source and test
Between container, for the SF to injection cavity6Gas is heated；And decomposition product collecting, it is connected with test chamber；
The different faults type includes partial discharges fault and overheating fault.
The further preferred scheme of the present invention are as follows: the discharge electrode includes the pin electrode and plate electrode of alternate setting；It is described
Pin electrode or plate electrode are equipped with for adjusting needle-plate spacing distance adjustor；The pedestal of distance adjustor is fixed with test chamber,
The pin electrode or plate electrode are fixed on the adjustable side of distance adjustor；At adjustable side and pedestal relative displacement, the pin electrode
The distance between plate electrode also can increase with it or reduce.
The further preferred scheme of the present invention are as follows: the test chamber includes upper cover plate, cylinder and lower cover plate；Upper and lower lids
It is fastened on cylinder by long bolt, forms the cavity between the cylinder and two cover boards.
The further preferred scheme of the present invention are as follows: the cylinder is equipped with visor, and there are two visor is set, two visors are about chamber
The axle center of body is symmetrical arranged.
The further preferred scheme of the present invention are as follows: bleeding point is provided on the test chamber, bleeding point is equipped with pumping high temperature
Solenoid valve；The negative pressure generating device is connected with the pumping high-temperature solenoid valve.
The further preferred scheme of the present invention are as follows: one is provided on the test chamber for being passed through SF6Gas or discharge are decomposed
The charge and discharge port of product, charge and discharge port are equipped with main road high-temperature solenoid valve, and the first high-temperature solenoid valve other end is equipped with tee tube, institute
State SF6The heated device of gas source is connected with a nozzle of tee tube, another pipe of the decomposition product collecting and tee tube
Mouth is connected.
The further preferred scheme of the present invention are as follows: the heating device is electric heater unit or combustion type heating device；It is described
The air inlet of heating device is through a heat-insulated coil pipe and the SF6Gas source is connected, one high pressure check valve of gas outlet of heating device
It is connected with a nozzle of the tee tube.
The further preferred scheme of the present invention are as follows: the gas source includes air container, manual switch valve, pressure regulator valve, pressure gauge
And vent valve；When being inflated to the test chamber, the SF that is stored in air container6Followed by manual switch valve, pressure regulation
Valve, pressure gauge and vent valve enter heating device.
The further preferred scheme of the present invention are as follows: the decomposition product collecting includes branch high-temperature solenoid valve, heat exchanger,
Counterbalance valve, exhaust valve and overheat test manual switch valve；Another nozzle of the branch high-temperature solenoid valve and the tee tube
It is connected, the other end of branch high-temperature solenoid valve is connected with the air inlet of heat exchanger；The counterbalance valve, exhaust valve respectively with a threeway
The connector of connector is connected, and another connector of three-way connection is docked with the exhaust outlet of heat exchanger, overheat test manual switch valve
The other end of exhaust valve is set.
Another object of the present invention is to provide a kind of test operation system, including control cabinet and it is based on different faults type
SF6Decomposition product extraction element；Control discharge operation, air supplying operation and heating operation are respectively provided on the control cabinet
Operation panel.
In conclusion the invention has the following advantages: passing through simulation SF6Shelf depreciation is occurring for air insulating device
When the case where failure and/or overheating fault, SF in corresponding situation is acquired6Gas decomposition product, will pass through subsequent analysis SF6Gas
Body decomposition product reaches to obtain the content and proportionate relationship of the decomposition product under different discharge defects and Superheated steam drier
The purpose of state of insulation inside to accurate judgement equipment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1.
Fig. 2 is the structural schematic diagram of test chamber on station in embodiment 2.
Fig. 3 is the structural schematic diagram of decomposition product collecting on station in embodiment 2, heating device and gas source.
In figure: 1, cavity；11, upper cover plate；12, cylinder；13, lower cover plate；14, it is evacuated high-temperature solenoid valve；15, main road high temperature
Solenoid valve；16, tee tube；21, pin electrode；22, plate electrode；23, distance adjustor；24, high pressure introduces component；3, negative pressure generates dress
It sets；31, it is evacuated manual switch valve；32, high-temp pressure sensor；33, radiator coil tube；4, heating device；41, high pressure check valve；
42, heat-insulated coil pipe；43, the first temperature sensor；44, second temperature sensor；5, gas source；51, air container；52, it opens manually
Close valve；53, pressure regulator valve；54, pressure gauge；55, vent valve；6, decomposition product collecting；61, branch high-temperature solenoid valve；62, it changes
Hot device；63, three-way connection；64, counterbalance valve；65, exhaust valve；66, overheat test manual switch valve.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
The present embodiment is only explanation of the invention, is not limitation of the present invention, and those skilled in the art exist
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in the present invention
Scope of the claims in all by the protection of Patent Law.
Embodiment 1: it as shown in Figure 1, showing the sulfur hexafluoride decomposition product extraction element based on different faults type, wraps
Include test chamber, negative pressure generating device 3, SF6Gas source 5, heating device 4 and decomposition product collecting 6.Here different faults
Type includes partial discharges fault and overheating fault.
Test chamber is wherein connected with high pressure on an electrode in cavity 1 including the cavity 1 for placing a pair of discharge electrodes
Introduce component 24.Test chamber includes upper cover plate 11, cylinder 12 and lower cover plate 13.Upper and lower lids 13 are fastened on by long bolt
On cylinder 12, cavity 1 is formed between cylinder 12 and two cover boards.Cylinder 12 is equipped with visor (not shown), and visor is equipped with two
A, two visors are symmetrical arranged about the axle center of cavity 1.Test chamber uses vertical structure, upper cover plate 11, cylinder 12 and lower cover
Plate 13 is all made of 304 stainless steel materials；Visor uses quartz glass, a diameter of 50mm.Upper cover plate 11, cylinder 12 and lower cover plate
Sealing material between 13 uses high temperature sealing material, and heatproof is greater than 800 DEG C.Test chamber allowable stress 0.6MPa with
Interior, the resistance to of visor is pressed within 2MPa.
Discharge electrode includes the pin electrode 21 and plate electrode 22 of alternate setting.Plate electrode 22 is rounded, diameter 50mm, position
In 1 inner upper of cavity.In the present embodiment, plate electrode 22 introduces component 24 by external high pressure and accesses 380v-110kv's
High voltage is illustrated here with 100kv.Pin electrode 21 is located at 1 lower inside of cavity, tip and 22 face of plate electrode,
The other end is equipped with for adjusting needle-plate spacing distance adjustor 23, and the pedestal of distance adjustor 23 and adjustable side are adopted in the present embodiment
It is threadedly coupled to realize roll adjustment, needle-plate spacing is up to 30mm.The pedestal of distance adjustor 23 is fixed with test chamber, needle electricity
Pole 21 is fixed on the adjustable side of distance adjustor 23, and adjustable side wears lower cover plate 13 and between lower cover plate 13 using vacuum shaft sealed knot
Structure.At adjustable side and pedestal relative displacement, the distance between pin electrode 21 and plate electrode 22 also can increase with it or reduce.It removes
Except this, pin electrode 21 and plate electrode 22 can replace specification as needed, also can transposition.
Bleeding point is provided on test chamber, bleeding point is equipped with pumping high-temperature solenoid valve 14.Negative pressure generating device 3 and pumping
High-temperature solenoid valve 14 is connected, for vacuumizing to cavity 1.The gas outlet of negative pressure generating device 3 is equipped with pumping manual switch
The other side of valve 31, pumping manual switch valve 31 is connected with the gas tank for storing dry air or nitrogen (as working gas).
SF6Gas source 5, connect with test chamber, for injecting SF into cavity 16Gas.Heating device 4 is arranged in SF6
Between gas source 5 and test chamber, for the SF to injection cavity 16Gas is heated.Decomposition product collecting 6, with test
Container is connected, and collects decomposition product after the end of the test.
In the present embodiment, one is provided on test chamber for being passed through SF6Gas or the charge and discharge port that decomposition product is discharged,
Charge and discharge port is equipped with main road high-temperature solenoid valve 15, and 15 other end of main road high-temperature solenoid valve is equipped with tee tube 16.SF6Gas source 5 passes through
Heating device 4 is connected with a nozzle of tee tube 16, and decomposition product collecting 6 is connected with another nozzle of tee tube 16.
Gas source 5 includes air container 51, manual switch valve 52, pressure regulator valve 53, pressure gauge 54 and vent valve 55.To test
When container is inflated, the SF that is stored in air container 516Followed by manual switch valve 52, pressure regulator valve 53, pressure gauge 54 and put
Air valve 55 enters heating device 4.
In the present embodiment, heating device 4 is that electric heater unit 4(can also use combustion type heating device 4), heating dress
4 power about 0.5 to 1kW are set, flow when heated is 1.0g/s, and in 1.0MPa, adjustable temperature range exists allowable stress
200 DEG C~650 DEG C.The air inlet of heating device 4 is through a heat-insulated coil pipe 42 and SF6Gas source 5 is connected, the gas outlet of heating device 4
It is connected through a high pressure check valve 41 with a nozzle of tee tube 16.
Decomposition product collecting 6 include branch high-temperature solenoid valve 61, heat exchanger 62, counterbalance valve 64, exhaust valve 65 and
Overheat test manual switch valve 66.Branch high-temperature solenoid valve 61 is connected with another nozzle of tee tube 16, branch high-temperature solenoid valve
61 other end is connected with the air inlet of heat exchanger 62.Counterbalance valve 64, exhaust valve 65 connector with a three-way connection 63 respectively
It is connected, another connector of three-way connection 63 is docked with the exhaust outlet of heat exchanger 62, and the setting of overheat test manual switch valve 66 exists
The other end of exhaust valve 65.In the present embodiment, heat exchanger 62 uses water cooling heat exchanger 62, and overheated gas exchanges heat by water cooling
After the cooling of device 62 and heat dissipation, temperature should be lower than 100 DEG C；The settable back pressure ranges of counterbalance valve 64 are 0.2~0.6MPa.
The present embodiment specific operation process is as follows,
1, the preparation before high temperature needle-plate discharge test, including
The first step is powered, connects SF6Gas source 5(heating device 4) air inlet pipeline and negative pressure generating device 3 work air pipe
(work gas can be nitrogen or compressed air).
The air pressure of negative pressure generating device 3 is set 0.5~0.6MPa by second step.Open pumping high-temperature electric
Then magnet valve 14 opens pumping manual switch valve 31, extracts the residual air in cavity 1.Observe high-temp pressure sensor 32
It has been shown that, display absolute pressure reach the limit of negative pressure generating device 3 when being 10kpa or so, close pumping high-temperature electromagnetic at this time
Valve 14 and pumping manual switch valve 31.
Third step adjusts the adjusting knob of distance adjustor 23, observes the needle plate for reaching and needing away from numerical value by form.
SF is arranged in 4th step6The outlet pressure of air container 51 is 0.5MPa, then sets SF by pressure regulator valve 536Gas
The inlet pressure of body.Lead to pressure rise in view of that can expand after gas heating, can preset input pressure herein is 0.05MPa.
5th step sets required gas temperature, begins to warm up to the energization of heating device 4.When heating element temperature
When reaching the numerical value of needs, main road high-temperature solenoid valve 15 and vent valve 55 are opened, observes the display of gas temperature at this time, judgement is
It is no to meet test requirements document, if error is larger, heating temperature should be reset.
6th step is observed the pressure registration of cavity 1 in real time, should sequentially be closed if reaching the pressure of needs in gas replenishment process
Main road high-temperature solenoid valve 15, vent valve 55, manual switch valve 52 are closed, and disconnects heating power supply.
8th step after the pressure and temperature of cavity 1 reaches requirement, can start to carry out discharge test.
2, the preparation before overheat test includes,
The first step sets the pipeline back pressure in superheating process by counterbalance valve 64, can lead in the case where heating device 4 is not turned on
It is whether suitable to detect back pressure to cross change gas supply air pressure.
SF is arranged in second step6The outlet pressure of air container 51 is 0.5MPa, then sets SF by pressure regulator valve 536Gas
The inlet pressure of body.Lead to pressure rise in view of that can expand after gas heating, can preset input pressure herein is 0.05MPa.
Third step sets required gas temperature, begins to warm up to the energization of heating device 4.When heating element temperature
When reaching the numerical value of needs, main road high-temperature solenoid valve 15 and vent valve 55 are opened, observes the display of gas temperature at this time, judgement is
It is no to meet test requirements document, if error is larger, heating temperature should be reset.
4th step carries out overheat experiment, and exhaust valve 65 and overheat test manual switch valve 66 are opened after the completion of overheat, will
Cross thermal medium (SF6Decomposition product in test) it is discharged into sampling bottle and closes heating device 4.
Embodiment 2: as shown in Figures 2 and 3, formula in a kind of test operation system, including control cabinet and embodiment 1 is shown
The SF based on different faults type6Decomposition product extraction element.Control discharge operation, gas supply are respectively provided on control cabinet
The operation panel of operation and heating operation.It is additionally provided on test chamber and is passed for the high temperature pressure of the detection internal pressure in pumping
The collection tube of sensor 32, high-temp pressure sensor 32 is connected to through radiator coil tube 33 with test chamber.In order in Control experiment container
The temperature of 4 gas outlet of temperature and heating device of gas, test chamber are equipped with the first temperature sensor 43, high pressure check valve 41
Second temperature sensor 44 is equipped between heating device 4.High-temp pressure sensor 32, the first temperature sensor 43 and the second temperature
The registration of degree sensor 44 is shown on operation panel.Control cabinet major function is realized to pilot system each unit/device
Electrical connection, data show, motion action and control comprising 1 operation cabinet of discharging chamber, air supply unit operation cabinet, heating fill
Set 4 control cabinets, instrument valve mounting plate.
Claims (10)
1. the sulfur hexafluoride decomposition product extraction element based on different faults type, which is characterized in that including,
Test chamber is wherein connected with high pressure introducing group on an electrode in cavity including the cavity for placing a pair of discharge electrodes
Part；
Negative pressure generating device is connected with test chamber, for vacuumizing to cavity；
SF6Gas source is connect with test chamber, for injecting SF into cavity6Gas；
Heating device is arranged in SF6Between gas source and test chamber, for the SF to injection cavity6Gas is heated；And
Decomposition product collecting, is connected with test chamber；
The different faults type includes partial discharges fault and overheating fault.
2. sulfur hexafluoride decomposition product extraction element according to claim 1, it is characterised in that: the discharge electrode includes
The pin electrode and plate electrode of alternate setting；The pin electrode or plate electrode are equipped with for adjusting needle-plate spacing distance adjustor；
The pedestal of distance adjustor is fixed with test chamber, and the pin electrode or plate electrode are fixed on the adjustable side of distance adjustor；It is adjusting
When end is with pedestal relative displacement, the distance between the pin electrode and plate electrode also can increase with it or reduce.
3. sulfur hexafluoride decomposition product extraction element according to claim 1 or 2, it is characterised in that: the test chamber
Including upper cover plate, cylinder and lower cover plate；Upper and lower lids are fastened on cylinder by long bolt, between the cylinder and two cover boards
Form the cavity.
4. sulfur hexafluoride decomposition product extraction element according to claim 3, it is characterised in that: the cylinder is equipped with view
Mirror, there are two visor is set, two visors are symmetrical arranged about the axle center of cavity.
5. sulfur hexafluoride decomposition product extraction element according to claim 1 or 2, it is characterised in that: the test chamber
On be provided with bleeding point, bleeding point is equipped with pumping high-temperature solenoid valve；The negative pressure generating device and the pumping high-temperature solenoid valve
It is connected.
6. sulfur hexafluoride decomposition product extraction element according to claim 1 or 2, it is characterised in that: the test chamber
On be provided with one for being passed through SF6Gas or the charge and discharge port that decomposition product is discharged, charge and discharge port are equipped with main road high-temperature solenoid valve,
The main road high-temperature solenoid valve other end is equipped with tee tube, the SF6The heated device of gas source is connected with a nozzle of tee tube, described
Decomposition product collecting is connected with another nozzle of tee tube.
7. sulfur hexafluoride decomposition product extraction element according to claim 6, it is characterised in that: the heating device is electricity
Heating device or combustion type heating device；The air inlet of the heating device is through a heat-insulated coil pipe and the SF6Gas source is connected, and adds
One high pressure check valve of gas outlet of thermal is connected with a nozzle of the tee tube.
8. sulfur hexafluoride decomposition product extraction element according to claim 6, it is characterised in that: the gas source includes gas storage
Container, manual switch valve, pressure regulator valve, pressure gauge and vent valve；When being inflated to the test chamber, it is stored in air container
SF6Enter heating device followed by manual switch valve, pressure regulator valve, pressure gauge and vent valve.
9. sulfur hexafluoride decomposition product extraction element according to claim 6, it is characterised in that: the decomposition product is collected
Pipeline includes branch high-temperature solenoid valve, heat exchanger, counterbalance valve, exhaust valve and overheat test manual switch valve；The branch is high
Warm solenoid valve is connected with another nozzle of the tee tube, the air inlet phase of the other end and heat exchanger of branch high-temperature solenoid valve
Even；The counterbalance valve, exhaust valve are connected with the connector of a three-way connection respectively, another connector and heat exchanger of three-way connection
Exhaust outlet docking, the other end of exhaust valve is arranged in overheat test manual switch valve.
10. a kind of test operation system, including control cabinet and any one as described in claim 7-9 based on different faults
The sulfur hexafluoride decomposition product extraction element of type；Control discharge operation, air supplying operation are respectively provided on the control cabinet
With the operation panel of heating operation.
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Cited By (4)
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| CN111595991A (en) * | 2020-05-28 | 2020-08-28 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride electrical decomposition intermediate product extraction device and extraction method |
| CN111638433A (en) * | 2020-06-10 | 2020-09-08 | 广西电网有限责任公司电力科学研究院 | Experimental equipment and method for partial discharge decomposition of insulating silicone oil with adjustable environmental humidity |
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| CN113406488A (en) * | 2021-06-16 | 2021-09-17 | 国网安徽省电力有限公司电力科学研究院 | GIS internal overheating fault test device and test method |
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| CN111595991A (en) * | 2020-05-28 | 2020-08-28 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride electrical decomposition intermediate product extraction device and extraction method |
| CN111595991B (en) * | 2020-05-28 | 2022-08-12 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride electrical decomposition intermediate product extraction element |
| CN111638433A (en) * | 2020-06-10 | 2020-09-08 | 广西电网有限责任公司电力科学研究院 | Experimental equipment and method for partial discharge decomposition of insulating silicone oil with adjustable environmental humidity |
| CN112578018A (en) * | 2020-11-24 | 2021-03-30 | 广东电网有限责任公司电力科学研究院 | Novel device and method for testing decomposition and composite characteristics of environment-friendly insulating gas |
| CN112578018B (en) * | 2020-11-24 | 2022-01-11 | 广东电网有限责任公司电力科学研究院 | Device and method for testing decomposition and composite characteristics of insulating gas |
| CN113406488A (en) * | 2021-06-16 | 2021-09-17 | 国网安徽省电力有限公司电力科学研究院 | GIS internal overheating fault test device and test method |
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