CN106680681A - Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas - Google Patents
Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas Download PDFInfo
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- CN106680681A CN106680681A CN201710201782.9A CN201710201782A CN106680681A CN 106680681 A CN106680681 A CN 106680681A CN 201710201782 A CN201710201782 A CN 201710201782A CN 106680681 A CN106680681 A CN 106680681A
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
The invention relates to a device and method for detecting low temperature breakdown voltage and spectrum of a mixed gas, and belongs to the technical field of high voltage test; the device comprises a SF6 gas mixture charging and recovering device, a low temperature environment setting device, a mixed gas breakdown voltage detecting device and a spectrum collecting device; the method comprises the steps of adjusting distance between electrodes; evacuating a sealed gas chamber and a mixed gas storage tank; filling a cooled mixture into the sealed gas chamber to a set pressure value, and maintaining low temperature; increasing voltage, when the electrodes breakdown, recording oscilloscope readings, and sampling spectrum information when the electrodes breakdown; repeating experiment to get an average value; adjusting the experiment conditions and repeating the experiment; the device and method compensate for experimental measurements in a low temperature environment, and is beneficial for the application of electric equipment in severe cold area and study of micro-parameters of low temperature mixed gas; The device and method can conveniently and accurately control the mixing ratio of the mixed gas, can carry out the recycling and utilization of the mixed gas, can set the temperature of the mixed gas, and the collecting of the spectrum information has a real-time property.
Description
Technical field
The invention belongs to high-tension electricity experimental technique field, and in particular to a kind of mixed gas low temperature breakdown voltage and spectrum are examined
Survey device and method.
Background technology
Since the sixties in 20th century, SF6Gas is because having insulating capacity and excellent arc extinction performance higher extensive
Using in power industry, such as Cubicle Gas-Insulated Switchgear (GIS), gas-break switch (GCB), gas transmission of electricity pipeline
(GIL) etc..However, SF6Some are there are in actual applications not as people's will part：SF6Gas is larger in pressure, environment temperature
Easily liquefied in the case of too low, this makes in extremely frigid zones cold season in winter using being restricted, to the safety of power equipment
Operation constitutes a serious threat；Additionally, SF6The a large amount of of gas produce influence using meeting on the greenhouse effects in the whole world,《Discuss and decide in capital of a country
Book》In, SF6One of restricted six kinds of greenhouse gases are listed in, its global warming coefficient (GWP) is CO223900 times of gas.
For a long time, people are searching SF6Replacement gas carried out numerous studies, but not yet find one kind in insulating properties and arc extinguishing
Aspect of performance can completely substitute SF6Gas, then people be sought for using SF6Mixed gas (such as SF6/N2、SF6/CF4
Mixed gas) as insulation arc-extinguishing medium, the condensing temperature of insulating gas can be not only reduced, and SF can be reduced6Gas
Usage amount.At present, the application to mixed gas in high-voltage switch gear is also in theory study stage, existing experimental study
Be limited under normal temperature state mixed gas breakdown characteristics research, for mixed gas under cryogenic conditions puncture insulation characterisitic and
The problem of plasma spectrometry, needs further research.
The content of the invention
For the deficiency that above-mentioned prior art is present, the present invention provides a kind of mixed gas low temperature breakdown voltage and spectrum inspection
Survey device and method.
Technical scheme：
A kind of mixed gas low temperature breakdown voltage and spectrum detection device, including：SF6Mixed gas charge and discharge is filled with recovery
Put, low temperature environment setting device, mixed gas breakdown voltage detection means and spectra collection device；
The SF6Mixed gas charge and discharge includes with retracting device：For depositing SF6It is the gas cylinder of gas, another for depositing
A kind of gas cylinder of gas, mixed gas air accumulator, compressor 1, filter absorption of device, vavuum pump, gas connection pipe road, gas
Flowmeter body G1, air valve K1, gas flowmeter G2, air valve K2, electro connecting pressure gauge G4With air valve K3；
The low temperature environment setting device includes：Temperature control system, compressor 2, heat exchanger, condenser, expansion valve,
Motor and memory；
The mixed gas breakdown voltage detection means includes：Gas sealing system, the resistance for measuring transient high voltages
Hold divider, the oscillograph for showing RC divider low-pressure end output voltage, high-tension electricity generation device and first resistor；Institute
Stating gas sealing system includes：Closed vessel, sealed air chamber, positive electrode, negative electrode, temperature sensor and roll adjustment knob；
The spectra collection device includes：Host computer, phototiming triggering probe, fibre-optical probe and fiber spectrometer；
The gas cylinder is connected with two air inlets of mixed gas air accumulator respectively, the gas flowmeter G1It is gentle
Valve K1It is arranged on storage SF6On the gas cylinder of gas and the gas connection pipe road of mixed gas air accumulator, gas flowmeter G2With
Air valve K2It is arranged on another gas cylinder of gas of storage and the gas connection pipe road of mixed gas air accumulator, is capable of achieving SF6
Gas is mixed with another gas with arbitrary proportion, and electro connecting pressure gauge G is provided with the mixed gas air accumulator4, for examining
Two kinds of partial pressures of gas in mixed gas air accumulator are surveyed, mixed gas air accumulator gas outlet is connected respectively by gas connection pipe road
Compressor and vavuum pump are connect, vavuum pump connection filters absorption of device, and compressor 1 is mixed with heat exchanger by gas connection pipe road
Gas input connection is closed, air valve K is provided with gas connection pipe road3；The compressor 1 is used in mixed gas air accumulator
Mixed gas insufflation gas sealing system, or the mixed gas in gas sealing system are recycled to mixed gas air accumulator
In；
The gas vent connection gas input of compressor 2 of the heat exchanger, the drive end of compressor 2 connection motor,
The gas output end of compressor 2 connection condenser one end, condenser other end connection memory, memory connection expansion valve, expansion
The gas access of valve connection exchanger, heat exchanger and expansion valve are connected with temperature control system output end respectively, temperature control
System input connects temperature sensor；
The sealed air chamber is placed in closed vessel, and sealed air chamber's side wall is provided with window, and closed vessel side is provided with
Temperature sensor, sealed air chamber one end is provided with roll adjustment knob, and positive electrode and negative electrode are arranged in sealed air chamber, positive electrode and negative
The distance between electrode can be adjusted by the adjusting knob above sealed air chamber, and sealed air chamber is connected by gas connection pipe road
The mixed gas output end of heat exchanger, is provided with pressure gauge G on gas connection pipe road3, positive electrode and negative electrode respectively with height
Piezoelectric generating apparatus positive output end and negative output terminal are connected, and the high-pressure side of RC divider is connected to the first electricity of protection circuit
One end of resistance, the other end connection high-tension electricity generation device positive output end of first resistor, the low-pressure end connection of RC divider is shown
Ripple device, the earth terminal ground connection of RC divider；
The fiber spectrometer and host computer are connected by data wire, for gathering spectral information light in gas sealing system
Synchronous triggering probe and fibre-optical probe are connected with fiber spectrometer respectively, and the phototiming triggering probe and fibre-optical probe lead to respectively
The center crossed between sealed air chamber's side window alignment positive electrode and negative electrode.
Using mixed gas low temperature breakdown voltage and the breakdown voltage and spectral method of detection of spectrum detection device, including such as
Lower step：
Step 1：The distance between positive electrode and negative electrode in sealed air chamber are adjusted by adjusting knob；
Step 2：Open compressor 1 mixed gas in sealed air chamber are recycled in mixed gas air accumulator, remove close
Remaining gas in envelope air chamber, opens vavuum pump and vacuumizes mixed gas air accumulator, and is taken out by filtering absorption of device discharge
The residual gas for taking；
Step 3：Adjusting air valve K1With air valve K2, observation electro connecting pressure gauge G4, control gas cylinder is to mixed gas gas storage
Inflated in tank；
Step 4：Mixed gas air accumulator opens air valve K by after gas mixing3, mixed gas are transferred to by compressor 1
Low temperature environment setting device；
Step 5：Mixed gas are transferred to sealed air chamber after low temperature environment setting device is cooled down；
When mixed gas low temperature breakdown voltage and spectrum detection device include temperature initialization system and temperature sensor,
The temperature of low temperature needed for being set in temperature control system, temperature control system obtains blanket gas room temperature by temperature sensor
Degree, and controlling stream crosses the mixed gas cooling velocity of low temperature environment setting device, blanket gas indoor temperature is reached setting value；
When sealed air chamber is connected with pressure gauge G3When, pressure gauge G3Whether pressure reaches setting in real-time monitoring sealed air chamber
Pressure values, are to close K3, perform step 6, otherwise, continue to be input into mixed gas to sealed air chamber；
Step 6：High-tension electricity generation device applies to continue elevated voltage to the positive electrode in sealed air chamber and negative electrode；
Step 7：When the positive electrode in sealing chamber and negative electrode gap breakdown, positive electrode forms electric arc etc. with negative electricity interpolar
Gas ions, high-tension electricity generation device stops pressurization；
Step 8：Breakdown voltage shows and records through RC divider in oscillograph；
Step 9：Phototiming triggers probe detection to after arc light, and fiber spectrometer begins through fibre-optical probe collection electric arc etc.
The spectral information of gas ions, is sent to host computer；
Step 10：Host computer analyzes spectral information.
Beneficial effect：A kind of mixed gas low temperature breakdown voltage of the invention and spectrum detection device and method and existing skill
Art is compared, with following advantage：
(1) under measurement low temperature environment mixed gas breakdown voltage, the vacancy that measurement is tested under low temperature environment is made up, to tight
Cold area power equipment application has certain Research Significance；
(2) under measurement low temperature environment mixed gas plasma spectrometry, to research low-temperature mixed gas microcosmic parameter tool
There is breakthrough；
(3) mixed gas air accumulator is believed that zero leakage, and gas with various is entered by different air inlets, greatly ensure that
Mixed gas can be sufficiently mixed, and prevent lamination, electro connecting pressure gauge, the flowmeter control being equipped with by air accumulator surface
Gas flow rate, convenient accurate control mixed gas mixing ratio；
(4) recycle and reuse of mixed gas can be completed, the utilization of resources is improved and is saved experimental cost, can realized substantially
SF6To the zero-emission in air；
(5) low temperature environment setting device can be very good to set the temperature experiment of mixed gas not by ambient temperature shadow
Ring, it is ensured that the reliability of experiment；
(6) fibre-optical probe and phototiming triggering probe can produce the spectral information of collection in a flash of electric arc and be saved in
Host computer, with real-time.
Brief description of the drawings
Fig. 1 is the mixed gas low temperature breakdown voltage and spectrum detection device schematic diagram of one embodiment of the present invention, its
In, 1 is SF6Mixed gas charge and discharge and retracting device, 2 is low temperature environment setting device, and 3 is that mixed gas breakdown voltage detects dress
Put, 4 is spectra collection device, and 5 is the gas cylinder for depositing SF6 gases, and 6 is the high pressure gas for depositing another gas
Bottle, 7 is mixed gas air accumulator, and 8 is compressor, and 9 to filter absorption of device, and 10 is vavuum pump, and 11 is gas connection pipe road, 12
It is compressor, 13 is heat exchanger, and 14 is condenser, and 15 is expansion valve, and 16 is motor, and 17 is memory, and 18 is temperature control
System processed, 19 is RC divider, and 20 is oscillograph, and 21 is high-tension electricity generation device, and 22 is first resistor, and 23 hold for closing
Device, 24 is sealed air chamber, and 25 is positive electrode, and 26 is negative electrode, and 27 is temperature sensor, and 28 is window, and 29 is roll adjustment knob, 30
It is host computer, 31 is that phototiming triggers probe, and 32 is fibre-optical probe, and 33 is fiber spectrometer；
Fig. 2 is the mixed gas low temperature breakdown voltage and spectral method of detection flow chart of one embodiment of the present invention.
Specific embodiment
One embodiment of the present invention is elaborated below in conjunction with the accompanying drawings.
SF6After the gas that will not be reacted with another kind, such as nitrogen, carbon tetrafluoride, carbon dioxide mixing, root
According to the Dalton laws of partial pressure, by controlling SF in mixed gas6The partial pressure of gas is so as to adjust SF6With the mixing ratio of another gas,
I.e.
In formula：nA、nBIt is two kinds of molal quantitys of gas；pA、pBIt is two kinds of partial pressures of gas, i.e., after two kinds gas mixings
The pressure for undertaking, therefore SF in mixed gas can be controlled by controlling two kinds of pressure ratios of gas6The content of gas.
As shown in figure 1, a kind of mixed gas low temperature breakdown voltage and spectrum detection device of present embodiment, including：SF6
Mixed gas charge and discharge and retracting device 1, low temperature environment setting device 2, mixed gas breakdown voltage detection means 3 and spectra collection
Device 4；
The SF6Mixed gas charge and discharge includes with retracting device 1：For depositing SF6The gas cylinder 5 of gas, for depositing
The gas cylinder 6 of another gas, mixed gas air accumulator 7, compressor 8, filter absorption of device 9, the connection of vavuum pump 10, gas
Pipeline 11, gas flowmeter G1, air valve K1, gas flowmeter G2, air valve K2, air valve K3With electro connecting pressure gauge G4。
Another gas is gas of the liquefaction point below -50 DEG C, including nitrogen, carbon dioxide, carbon tetrafluoride, lazy
Property gas.
The low temperature environment setting device 2 includes：It is compressor 12, heat exchanger 13, condenser 14, expansion valve 15, electronic
Machine 16, memory 17 and temperature control system 18.
The mixed gas breakdown voltage detection means 3 includes：Gas sealing system, the resistance for measuring transient high voltages
Hold divider 19, the oscillograph 20 for showing RC divider low-pressure end output voltage, the electricity of high-tension electricity generation device 21, first
22 and pressure gauge G of resistance3；The gas sealing system includes：Closed vessel 23, sealed air chamber 24, positive electrode 25, negative electrode 26,
Temperature sensor 27 and roll adjustment knob 29, the side of sealed air chamber 24 are provided with window 28, and temperature sensor 27 is arranged on closing to be held
The side of device 23.The one end of sealed air chamber 24 is provided with roll adjustment knob 29.Closed vessel 23 isolates sealed air chamber 24 with external environment, protects
Hold short time experiment low temperature environment.
The spectra collection device 4 includes：Host computer 30, phototiming triggering probe 31, fibre-optical probe 32 and fiber spectrum
Instrument 33.
The gas cylinder 5 and gas cylinder 6 are connected with two air inlets of mixed gas air accumulator 7 respectively, and gas
Gas flowmeter G is respectively equipped with body connecting line 111, air valve K1With gas flowmeter G2, air valve K2, it is capable of achieving SF6Gas with
Another gas is mixed with arbitrary proportion；Electro connecting pressure gauge G is provided with mixed gas air accumulator 74, mixed gas air accumulator 7
Gas outlet connects compressor 8 and vavuum pump 10 respectively by gas connection pipe road 11, and the connection of vavuum pump 10 filters absorption of device 9；
Compressor 8 is connected by gas connection pipe road 11 with the mixed gas input of heat exchanger 13, is set on gas connection pipe road 11
It is equipped with air valve K3.The mixed gas air accumulator 7 is provided with protection device, for when gas pressure in mixed gas air accumulator 7
Compressor 8 is controlled to disconnect automatically during more than setting value.It is described to have electro connecting pressure gauge G4In for detecting mixed gas air accumulator
Two kinds of partial pressures of gas, the compressor 8 is used to for the mixed gas in mixed gas air accumulator 7 to be filled with sealed air chamber 24
In, or the mixed gas in sealed air chamber 24 are recycled in mixed gas air accumulator 7.The vavuum pump 10 is used for will sealing
Air chamber 24 or mixed gas air accumulator 7 are vacuumized.
The gas vent connection gas input of compressor 12 of the heat exchanger 13, the drive end of compressor 12 connection is electronic
Machine 16, the gas output end of compressor 12 connection condenser 14 one end, the other end of condenser 14 connection memory 17, memory 17 connects
Connect expansion valve 15, the gas access of the connection exchanger 13 of expansion valve 15, heat exchanger 13 and expansion valve 15 respectively with temperature control
The output end of system 18 is connected.
Before mixed gas flow through low temperature environment setting device, low temperature environment setting device, compressor starts compression are opened
It is used to produce the gas of low temperature environment in the device, the gas after compression is delivered to the condenser being connected with compressor, condenser
Gas after compression is changed into liquid storage in holder, liquid is delivered to heat exchanger by holder by expansion valve, heat
Exchanger is transferred to mixed gas sealed air chamber after evaporation endothermic is lowered the temperature to the mixed gas for flowing through heat exchanger.
The mixed gas sealed air chamber 24 is placed in closed vessel 23, and sealed air chamber 24 is cylinder, Ground Diameter
100mm, 500mm high, side wall is made up of lucite, and the side wall of sealed air chamber 24 is provided with quartzy form i.e. window 28, positive electricity
Pole 25 and negative electrode 26 can use plate electrode, rod-plate electrode or needle to board electrode, and there is chamfering at the edge of electrode to prevent side
Edge effect.Positive electrode 25 and negative electrode 26 are arranged in sealed air chamber 24, and the distance between positive electrode 25 and negative electrode 26 can be with
Adjusted by the adjusting knob 29 of the top of sealed air chamber 24, sealed air chamber 24 connects the mixing of heat exchanger 13 by gas pipeline
Gas output end.On the gas pipeline that sealed air chamber is connected with heat exchanger pressure gauge is being provided with sealed air chamber lower end
G3, the gas pressure situation of sealed air chamber is entered for monitoring.The input of temperature control system 18 connects temperature sensor 27, just
Electrode 25 and negative electrode 26 are connected with the positive output end of high-tension electricity generation device 21 and negative output terminal respectively；The height of RC divider 19
Press bond is used for one end of the first resistor 22 of protection circuit, the other end connection high-tension electricity generation device 21 of first resistor 22
Positive output end, the low-pressure end connection oscillograph 20 of RC divider 19, the earth terminal ground connection of RC divider 19.First electricity
Resistance 22 uses water resistance.
The high-tension electricity generation device includes：ZDFI-1200kV/50mA types DC voltage generator, TZF400-400 types
Resitstance voltage divider, TCF400-200 types impulse voltage divider and MWF400-0.25 type impulse capacitors.
The fiber spectrometer 33 and host computer 30 are connected by data wire, phototiming triggering probe 31 and fibre-optical probe 32
It is connected with fiber spectrometer 33 respectively, phototiming triggering probe 31 and fibre-optical probe 32 are directed at positive electricity by quartzy form 28 respectively
Center between pole 25 and negative electrode 26.
As shown in Fig. 2 using mixed gas low temperature breakdown voltage and the mixed gas low temperature breakdown potential of spectrum detection device
Pressure and spectral method of detection, comprise the following steps：
Step 1：The distance between positive electrode and negative electrode in sealed air chamber are adjusted by adjusting knob；
Step 2：Be recycled to mixed gas in sealed air chamber in mixed gas air accumulator by compressor, removes sealed air chamber
Interior remaining gas, opens vavuum pump and vacuumizes mixed gas air accumulator, and discharges the residual of extraction by filtering absorption of device
Residual air body；
Step 3：Adjusting air valve K1With air valve K2, observation electro connecting pressure gauge G4, control gas cylinder is to mixed gas gas storage
Inflated in tank；
Step 4：Mixed gas air accumulator opens air valve K by after gas mixing3, mixed gas are transferred to low temperature environment and set
Determine device；
Step 5：Mixed gas are transferred to sealed air chamber after low temperature environment setting device is cooled down：
Step 5-1：Mixed gas are input into heat exchanger mixed gas input；
Step 5-2：It is used to produce the gas of low temperature environment in compressor starts compression low temperature environment setting device, will compresses
Gas afterwards delivers to the condenser being connected with compressor；
Step 5-3：Gas after compression is changed into liquid storage in holder by condenser；
Step 5-4：Liquid is delivered to heat exchanger by holder by expansion valve, and heat exchanger is by evaporation endothermic to flowing through
After the mixed gas cooling of heat exchanger, mixed gas sealed air chamber is transferred to；
Step 5-5：The blanket gas room temperature that temperature control system is obtained according to setting cryogenic temperature and by temperature sensor
The mixed gas cooling velocity of degree, control heat exchanger and expansion valve, and then controlling stream over-heat-exchanger, makes blanket gas Indoor Temperature
Degree reaches setting value；
Step 5-6：Pressure gauge G3Whether pressure reaches setting pressure values in real-time monitoring sealed air chamber, is, closes K3, holds
Row step 6, otherwise, continues to be input into mixed gas to sealed air chamber；
Step 6：High-tension electricity generation device applies to continue elevated voltage to the positive electrode in sealed air chamber and negative electrode；
Step 7：When the positive electrode in sealing chamber and negative electrode gap breakdown, after positive electrode and negative electricity interpolar insulation breakdown
Arc-plasma is formed, high-tension electricity generation device stops pressurization；
Step 8：Breakdown voltage shows and records through RC divider in oscillograph；
Step 9：Phototiming triggers probe detection to after arc light, and fiber spectrometer gathers arc plasma by fibre-optical probe
The spectral information of body, and it is sent to host computer；
Step 10：Host computer analyzes spectral information.
It is more comprehensive spectral information under acquisition different condition in present embodiment, also proceeds as follows：
Repeat step 6-10, measures the voltage and spectral information when the positive electrode and breakdown negative electrode in 6 sealing chambers；
Host computer calculates breakdown voltage average value, and analyzes spectral information；
Adjusting knob increases the distance between positive electrode and negative electrode in sealed air chamber, and step 6-10 is repeated several times, and measures
Breakdown voltage average value and spectral information during Different electrodes spacing；
Using mixed gas in compressor extraction sealed air chamber；
Regulation ratio of gas mixture, under different ratio of gas mixture, adjusts electrode distance, and step 6-10 is repeated several times,
Measure the breakdown voltage average value and spectral information during different ratio of gas mixture；
Regulation cryogenic temperature, at a temperature of Different hypothermia, adjusts ratio of gas mixture and electrode distance, repeat step 6-
10, breakdown voltage average value and spectral information during measurement different temperatures.
Claims (5)
1. a kind of mixed gas low temperature breakdown voltage and spectrum detection device, it is characterised in that including：SF6Mixed gas charge and discharge with
Retracting device, low temperature environment setting device, mixed gas breakdown voltage detection means and spectra collection device；
The SF6Mixed gas charge and discharge includes with retracting device：For depositing SF6The gas cylinder of gas, for depositing another kind
The gas cylinder of gas, mixed gas air accumulator, compressor 1, filter absorption of device, vavuum pump, gas connection pipe road, gas stream
Gauge G1, air valve K1, gas flowmeter G2, air valve K2, electro connecting pressure gauge G4With air valve K3；
The mixed gas breakdown voltage detection means includes：Gas sealing system, the capacitance-resistance point for measuring transient high voltages
Depressor, the oscillograph for showing RC divider low-pressure end output voltage, high-tension electricity generation device and first resistor；The gas
Body sealing system includes：Closed vessel, sealed air chamber, positive electrode, negative electrode and roll adjustment knob；
The spectra collection device includes：Host computer, phototiming triggering probe, fibre-optical probe and fiber spectrometer；
The gas cylinder is connected with two air inlets of mixed gas air accumulator respectively, the gas flowmeter G1With air valve K1
It is arranged on storage SF6On the gas cylinder of gas and the gas connection pipe road of mixed gas air accumulator, gas flowmeter G2And air valve
K2It is arranged on another gas cylinder of gas of storage and the gas connection pipe road of mixed gas air accumulator, the mixed gas
Electro connecting pressure gauge G is provided with air accumulator4, for detecting two kinds of partial pressures of gas, gaseous mixture in mixed gas air accumulator
Body air accumulator gas outlet connects compressor 1 and vavuum pump respectively by gas connection pipe road, and vavuum pump passes through gas connection pipe road
Connection filters absorption of device, and compressor 1 is by being provided with air valve K3Gas connection pipe road and low temperature environment setting device be input into
End connection；
The sealed air chamber is placed in closed vessel, and sealed air chamber's side wall is provided with window, and sealed air chamber one end is provided with roll adjustment rotation
Button, positive electrode and negative electrode are arranged in sealed air chamber, and the distance between positive electrode and negative electrode can be by sealed air chamber
Side adjusting knob regulation, sealed air chamber by gas connection pipe road connect low temperature environment setting device output end, positive electrode and
Negative electrode is connected with high-tension electricity generation device positive output end and negative output terminal respectively, and the high-pressure side of RC divider is connected to protect
Protect one end of the first resistor of circuit, the other end connection high-tension electricity generation device positive output end of first resistor, RC divider
Low-pressure end connection oscillograph, RC divider earth terminal ground connection；
The fiber spectrometer and host computer are connected by data wire, for gathering spectral information phototiming in gas sealing system
Triggering probe and fibre-optical probe are connected with fiber spectrometer respectively, and the phototiming triggering probe and fibre-optical probe are respectively by close
Center between envelope air chamber side window alignment positive electrode and negative electrode.
2. mixed gas low temperature breakdown voltage according to claim 1 and spectrum detection device, it is characterised in that described low
Warm environment setting device includes：Compressor 2, heat exchanger, condenser, expansion valve, motor and memory；The heat exchanger
Gas vent connection the gas input of compressor 2, the drive end of compressor 2 connection motor, the gas output end of compressor 2 connection
Condenser one end, condenser other end connection memory, memory connection expansion valve, the gas of expansion valve connection exchanger enters
Mouthful, heat exchanger mixed gas input connection compressor 1, heat exchanger mixed gas output end connection sealed air chamber.
3. mixed gas low temperature breakdown voltage according to claim 1 and spectrum detection device, it is characterised in that described close
Envelope air chamber is by being provided with pressure gauge G3Gas connection pipe road connection low temperature environment setting device output end.
4. mixed gas low temperature breakdown voltage according to claim 2 and spectrum detection device, it is characterised in that the envelope
Close container side and be provided with temperature sensor, the low temperature environment setting device includes temperature control system, the heat exchanger
It is connected with temperature control system output end respectively with expansion valve, temperature control system input connection temperature sensor, temperature control
System processed is used to set cryogenic temperature in closed vessel.
5. a kind of mixed gas low temperature breakdown voltage and spectral method of detection, using the mixed gas low temperature described in claim 1
Breakdown voltage and spectrum detection device are realized, it is characterised in that comprised the following steps：
Step 1：The distance between positive electrode and negative electrode in sealed air chamber are adjusted by adjusting knob；
Step 2：Open compressor the mixed gas in sealed air chamber are recycled in mixed gas air accumulator, remove sealed air chamber
Interior remaining gas, opens vavuum pump and vacuumizes mixed gas air accumulator, and discharges the residual of extraction by filtering absorption of device
Residual air body；
Step 3：Adjusting air valve K1With air valve K2, observation electro connecting pressure gauge G4, control gas cylinder is in mixed gas air accumulator
Inflation；
Step 4：Mixed gas air accumulator opens air valve K by after gas mixing3, the incoming low temperature environment setting device of mixed gas；
Step 5：Mixed gas are transferred to sealed air chamber after low temperature environment setting device is cooled down；
Step 6：High-tension electricity generation device applies to continue elevated voltage to the positive electrode in sealed air chamber and negative electrode；
Step 7：When the positive electrode in sealed air chamber and negative electrode gap breakdown, high-tension electricity generation device stops pressurization；
Step 8：Breakdown voltage shows and records through RC divider in oscillograph；
Step 9：Phototiming triggers probe detection to after arc light, and fiber spectrometer is by fibre-optical probe collection arc-plasma
Spectral information, and it is sent to host computer；
Step 10：Host computer analyzes spectral information.
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| CN201710201782.9A CN106680681A (en) | 2017-03-30 | 2017-03-30 | Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas |
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|---|---|---|---|
| CN201710201782.9A CN106680681A (en) | 2017-03-30 | 2017-03-30 | Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108490326A (en) * | 2018-05-07 | 2018-09-04 | 沈阳工业大学 | The flashover voltage of the insulator detection device and method in mixed gas under cryogenic conditions |
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| CN111239564A (en) * | 2020-02-24 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Device and method for testing thermal state gas breakdown characteristics |
| CN111562032A (en) * | 2020-06-03 | 2020-08-21 | 山东电工电气集团有限公司 | Combined electrical apparatus temperature monitoring method based on fiber bragg grating sensor |
| CN111562032B (en) * | 2020-06-03 | 2021-07-23 | 山东电工电气集团有限公司 | Combined electrical apparatus temperature monitoring method based on fiber bragg grating sensor |
| CN112595942A (en) * | 2020-12-26 | 2021-04-02 | 广东电网有限责任公司电力科学研究院 | Gas insulation performance test system and method |
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