CN105606978B - A kind of mixed gas breakdown voltage detection device and prediction technique - Google Patents
A kind of mixed gas breakdown voltage detection device and prediction technique Download PDFInfo
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- CN105606978B CN105606978B CN201610154066.5A CN201610154066A CN105606978B CN 105606978 B CN105606978 B CN 105606978B CN 201610154066 A CN201610154066 A CN 201610154066A CN 105606978 B CN105606978 B CN 105606978B
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- 230000015556 catabolic process Effects 0.000 title claims abstract description 76
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000007789 gas Substances 0.000 claims description 139
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001373 regressive effect Effects 0.000 claims description 3
- 238000012706 support-vector machine Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 101001095088 Homo sapiens Melanoma antigen preferentially expressed in tumors Proteins 0.000 description 2
- 102100037020 Melanoma antigen preferentially expressed in tumors Human genes 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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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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Abstract
A kind of mixed gas breakdown voltage detection device and prediction technique, the device include high voltage power supply generation device and several mixed gas breakdown voltage detection units；Mixed gas breakdown voltage detection unit includes gas sealing system, RC divider, switch, switch motion control system and oscillograph；The positive and negative electrode of gas sealing system is connect with the positive and negative output end of high voltage power supply generation device respectively；Gas sealing system and connecting valve motion control system in the connection line of high voltage power supply generation device positive output end；Gas sealing system and connecting valve in the connection line of switch motion control system；The high-pressure side of RC divider is connected in the connection line of high voltage power supply generation device and switch, and low-pressure end connects oscillograph.The present invention builds parallel mixed gas breakdown voltage detection unit and measures breakdown voltage under different ratio, improves detection efficiency.Support vector regression prediction model prediction breakdown voltage is established, breakdown voltage experimental work amount is reduced.
Description
Technical field
The invention belongs to field of gas discharge, and in particular to a kind of mixed gas breakdown voltage detection device and prediction side
Method.
Background technology
Since the 1960s, SF6Gas is because extensive with higher electric strength and excellent arc extinction performance
Ground use is in Cubicle Gas-Insulated Switchgear (GIS), gas circuit breaker (GCB), gas-insulated transformer, gas transmission of electricity
In pipeline (GIL).However, SF6There is also some shortcomingss in practical applications：SF6Gas is larger in pressure, environment temperature
Liquefaction is easy in the case of too low；SF6A large amount of use of gas can have an impact the greenhouse effects in the whole world,《Capital of a country is agreed
Book》In, SF6One of restricted six kinds of greenhouse gases are listed in, global warming coefficient (GWP) is CO223900 times of gas.
For a long time, people are to find SF6Replacement gas carried out numerous studies, but not yet find one kind in insulation performance and arc extinguishing
Aspect of performance can substitute SF completely6Gas, solve SF in short term6The method of greenhouse effects is to reduce it in the power system
Dosage such as uses SF6/N2、SF6/ CF4 mixed gas etc..Currently, to application of the mixed gas in high-voltage switch gear also in reason
By the exploratory stage, it need further to study especially for the problem of mixed gas breakdown characteristics.
Invention content
The purpose of the present invention is to provide a kind of mixed gas breakdown voltage detection device and prediction techniques.
The technical scheme is that：
A kind of mixed gas breakdown voltage detection device, including：
High voltage power supply generation device and several mixed gas breakdown voltage detection units；
Mixed gas breakdown voltage detection unit includes gas sealing system, RC divider, switch, switch motion control
System and oscillograph；
Gas sealing system includes：Sealing chamber, gas charge and discharge and retracting device, positive electrode, negative electrode；Positive electrode, negative electricity
Pole is arranged in sealing chamber, and the distance between positive electrode, negative electrode are adjustable, and sealing chamber connects gas charge and discharge and recycling by tracheae
Device one end；
The positive electrode of gas sealing system, negative electrode respectively with the positive output end of high voltage power supply generation device, negative output terminal
Connection；
Each gas sealing system is connected with switch motion control in the connection line of high voltage power supply generation device positive output end
System processed；
Gas sealing system is connected with switch in the connection line of switch motion control system；
The high-pressure side of RC divider is connected in the connection line of high voltage power supply generation device and switch, RC divider
Low-pressure end connect oscillograph, RC divider ground terminal ground connection.
The high voltage power supply generation device includes：Capacitance, diode, second resistance, transformer, pressure regulator, industrial frequency AC
Power supply；
Power frequency AC connects pressure regulator, and pressure regulator connects primary coil of transformer, and secondary coil one end of transformer connects
Connect second resistance one end, negative output as high voltage power supply generation device after secondary coil one end of transformer is connect with capacitance one end
End, the second resistance other end connect diode cathode, and diode cathode generates after being connect with the capacitance other end as high voltage power supply
The positive output end of device.
The switch motion control system includes：Current transformer, comparing element, 3rd resistor；
The input of current transformer is connected to the connecting line of gas sealing system and high voltage power supply generation device positive output end
Road, the output end of current transformer are connected to the input terminal of comparing element through 3rd resistor, and the output end connection of comparing element is opened
It closes.
The gas sealing system further includes：Gas cylinder, air valve, vacuum meter, air gauge；
Gas charge and discharge and the retracting device other end connect gas cylinder, the tracheae that gas charge and discharge and retracting device are connect with sealing chamber
In be provided with air valve, and vacuum meter and air gauge are installed.
The positive electrode, negative electrode use plate electrode, stick-plate electrode or needle to board electrode.
The high voltage power supply generation device positive output end is used for being connected in the connection line of RC divider high-pressure side
The first resistor of protection circuit.
The method for carrying out mixed gas breakdown voltage prediction using the mixed gas breakdown voltage detection device, packet
It includes：
Step 1：Adjust the distance between positive electrode and negative electrode in sealing chamber；
Step 2：Gas remaining in sealing chamber is removed using gas charge and discharge and retracting device；
Step 3：Under switch closed condition, inflated into each sealing chamber according to the different ratio of required mixed gas；
Step 4：Using high voltage power supply generation device to the positive electrode and negative electrode in the sealing chamber of each gas sealing system
Between apply continue raised voltage；
Step 5：When the positive electrode in sealing chamber is with negative electrode gap breakdown, the work of switch motion control system, circuit
In switch disconnect；
Step 6：Breakdown voltage at this time is shown after RC divider is depressured in oscillograph；
Step 7：Step 4~6 are repeated, until the indoor positive electrode of all closings, negative electrode are breakdown, high voltage power supply generates
Device stops power supply；
Step 8：Mixed gas is extracted out using gas charge and discharge and retracting device；
Step 9：The data that the mixed gases matching detected and breakdown voltage are formed are as mixed gas breakdown voltage
The sample data of prediction predicts breakdown voltage when mixed gas different ratio；
Step 9.1：It is the supporting vector exported to establish by input, breakdown voltage of the mixed gases matching in sample data
Machine regressive prediction model；
Step 9.1.1：Data in sample data are mapped to high-dimensional feature space, and are constructed in high-dimensional feature space
Support vector regression prediction model；
Step 9.1.2：The parameter in Support vector regression prediction model is obtained according to risk function；
Step 9.1.3：Kernel function is selected, final Support vector regression prediction model is obtained.
Step 9.2：The prediction of breakdown voltage when progress mixed gas different ratio, when obtaining mixed gas different ratio
Breakdown voltage prediction result.
Advantageous effect：
The present invention is examined by building the mixed gas breakdown voltage comprising parallel mixed gas breakdown voltage detection unit
Device is surveyed, the breakdown voltage under different ratio is measured, improves detection efficiency.It establishes with the mixed gases matching in sample data and is
Input, breakdown voltage are the Support vector regression prediction model of output, predict breakdown voltage when mixed gas different ratio,
The workload of mixed gas breakdown voltage experiment can be largely reduced, working efficiency is improved, reduces experimental cost.
Description of the drawings
Fig. 1 is the mixed gas breakdown voltage structure of the detecting device schematic diagram of the embodiment of the present invention 1；
Fig. 2 is that the gas sealing system of the embodiment of the present invention 1 sets structural schematic diagram；
Fig. 3 is the high voltage power supply generation device circuit diagram of the embodiment of the present invention 1；
Fig. 4 is the switch motion control system circuit schematic diagram of the embodiment of the present invention 1；
Fig. 5 is the method flow diagram of the mixed gas breakdown voltage prediction of the embodiment of the present invention 2.
Specific implementation mode
It elaborates below in conjunction with the accompanying drawings to the specific implementation mode of the present invention.
Embodiment 1
A kind of mixed gas breakdown voltage detection device, as shown in Figure 1, including：
High voltage power supply generation device and several mixed gas breakdown voltage detection units；
Mixed gas breakdown voltage detection unit includes gas sealing system, the resistive-capacitive voltage divider for measuring transient high voltages
Device, switch, switch motion control system and the oscillograph for showing RC divider low-pressure end output voltage；
As shown in Fig. 2, gas sealing system includes：Sealing chamber 1, the gas charge and discharge inflated and vacuumized into sealing chamber and
Retracting device 2, positive electrode 3, negative electrode 4；Sealing chamber is cylinder, and Ground Diameter 100mm, high 1000mm, side wall is by organic glass
Glass is constituted, and positive electrode 3, negative electrode 4 have 10 ° of chamfering using plate electrode, stick-plate electrode or needle to board electrode, the edge of electrode
To prevent edge effect.Positive electrode 3, negative electrode 4 are arranged in sealing chamber 1, and the distance between positive electrode 3, negative electrode 4 are adjustable,
It can be adjusted by the adjusting knob above sealing chamber, sealing chamber 1 connects gas charge and discharge and 2 one end of retracting device by tracheae；
Gas sealing system further includes：Gas cylinder 5, air valve 6 are closed the vacuum meter 7 of indoor vacuum degree, are used for for measuring
Measure the air gauge 8 of the air pressure of mixed gas；Gas charge and discharge and 2 other end of retracting device connect gas cylinder 5, gas charge and discharge and recycling
It is provided with air valve 6 in the tracheae that device 2 is connect with sealing chamber 1, and vacuum meter 7 and air gauge 8 are installed.The model of vacuum meter
Z100, measurement range are -0.1MPa~0MPa, and the barometric model Y100, measurement range is 0MPa~2.5MPa.Institute
State the model Q91SAF-64 of air valve.
The positive electrode 3 of gas sealing system, negative electrode 4 respectively with the positive output end of high voltage power supply generation device, negative output
End connection；
Each gas sealing system is connected with switch motion control in the connection line of high voltage power supply generation device positive output end
System processed；
Gas sealing system is connected with switch Di, i=1,2 ... ... n in the connection line of switch motion control system；
The high-pressure side of RC divider is connected in the connection line of high voltage power supply generation device and switch, RC divider
Low-pressure end connect oscillograph, RC divider ground terminal ground connection.
High voltage power supply generation device positive output end is connected with in the connection line of RC divider high-pressure side for protecting
The first resistor of circuit, first resistor use water resistance.
As shown in figure 3, high voltage power supply generation device includes：Capacitance, diode, the second resistance for protection circuit, use
In the transformer, the pressure regulator for adjusting power frequency AC output voltage, the power frequency AC that increase voltage；Diode and
Capacitance is used for rectification, converts AC power to DC power supply；Power frequency AC is 220V/50HZ；The model of transformer
YDJ-10/100, capacity 10kVA, no-load voltage ratio 11/5000；Second resistance is water resistance, resistance value 150M Ω；Pressure regulator model
TDGC2J-10, nominal input voltage 220V, rated output voltage 0V-250V, rated output frequency 50HZ；Capacitance is CH82 types
Capacitor, rated capacity value are 0.22 μ F ± 10%；The model 2DL 200/0.2 of diode.
Power frequency AC connects pressure regulator, and pressure regulator connects primary coil of transformer, and secondary coil one end of transformer connects
Connect second resistance one end, negative output as high voltage power supply generation device after secondary coil one end of transformer is connect with capacitance one end
End, the second resistance other end connect diode cathode, and diode cathode generates after being connect with the capacitance other end as high voltage power supply
The positive output end of device.
As shown in figure 4, switch motion control system includes：Current transformer, comparing element, 3rd resistor；Current Mutual Inductance
Device is LMK-0.66 type current transformers, no-load voltage ratio 100/5；Ammeter is VC140 type milliampere grade clamp ammeters, and range is
30mA-300mA；The resistance value of the resistance is 1k Ω, the comparator model LM393 type voltage comparators of comparing element, voltage
Ranging from 2V~36V.
The input of current transformer is connected to the connecting line of gas sealing system and high voltage power supply generation device positive output end
Road, the output end of current transformer are connected to the input terminal of comparing element through 3rd resistor, and the output end connection of comparing element is opened
It closes.
The detection process of above-mentioned mixed gas breakdown voltage detection device is as follows：Adjust positive electrode and negative electrode in sealing chamber
The distance between；Gas remaining in sealing chamber is removed using gas charge and discharge and retracting device；Under switch closed condition, according to institute
The different ratio of mixed gas is needed to be inflated into each sealing chamber；Using high voltage power supply generation device to the envelope of each gas sealing system
Apply between positive electrode and negative electrode in closed chamber and continues raised voltage；When the positive electrode in sealing chamber is hit with negative electricity clearance between poles
When wearing, electric current is generated between electrode, switch motion control system generates trip signal, and switch motion control system works, in circuit
Switch disconnect breakdown voltage at this time and show and record in oscillograph after RC divider is depressured；All closings are indoor
When positive electrode, negative electrode are breakdown, high voltage power supply generation device stops power supply；It is mixed using gas charge and discharge and retracting device extraction
Close gas；Complete detection.
Embodiment 2
The method for carrying out mixed gas breakdown voltage prediction using the mixed gas breakdown voltage detection device of embodiment 1,
As shown in figure 5, including：
Step 1：Adjust the distance between positive electrode and negative electrode in sealing chamber；Distance is adjusted to 5mm in the present embodiment；
Step 2：Gas remaining in sealing chamber is removed using gas charge and discharge and retracting device；
Step 3：Under switch closed condition, inflated into each sealing chamber according to the different ratio of required mixed gas；This reality
Apply the SF for being filled with 0.1MPa in example into sealing chamber6/N2Mixed gas, SF6And N2Mixing ratio be respectively 0%/100%,
10%/90%, 20%/80%, 30%/70%, 40%/60%, 50%/50%, 60%/40%, 70%/30%, 80%/
20%, 90%/10%, 100%/0%, 30 minutes are stood, so that mixed gas is sufficiently mixed, SF6Content is higher, and breakdown voltage is got over
It is high；
Step 4：Using high voltage power supply generation device to the positive electrode and negative electrode in the sealing chamber of each gas sealing system
Between apply continue raised voltage；
Step 5：When the positive electrode in sealing chamber is with negative electrode gap breakdown, electric current, switch motion control are generated between electrode
System processed generates trip signal, and switch motion control system works, and the switch in circuit disconnects；
Step 6：Breakdown voltage at this time is shown after RC divider is depressured in oscillograph；
Step 7：Step 4~6 are repeated, until the indoor positive electrode of all closings, negative electrode are breakdown, high voltage power supply generates
Device stops power supply；
Step 8：Mixed gas is extracted out using gas charge and discharge and retracting device；
Step 9：11 groups of data as shown in Table 1 that computer forms the mixed gases matching detected and breakdown voltage
As the sample data of mixed gas breakdown voltage prediction, breakdown voltage when mixed gas different ratio is predicted；
1 SF of table6/N2Mixed gas breakdown voltage
| SF6/N2Mixing ratio | Breakdown voltage/kV | SF6/N2Mixing ratio | Breakdown voltage/kV |
| 0%/100% | 15.64 | 60%/40% | 32.44 |
| 10%/90% | 20.81 | 70%/30% | 33.28 |
| 20%/80% | 24.64 | 80%/20% | 34.12 |
| 30%/70% | 26.42 | 90%/10% | 35.99 |
| 40%/60% | 28.2 | 100%/0% | 37.86 |
| 50%/50% | 30.32 |
Step 9.1：It is the supporting vector exported to establish by input, breakdown voltage of the mixed gases matching in sample data
Machine regressive prediction model；
Step 9.1.1：Data in sample data are mapped to high-dimensional feature space, and are constructed in high-dimensional feature space
Support vector regression prediction model；
If length is the sample data set of N：(x1, y1)、(x2, y2)、……、(xn, yn), xiFor mixed gases matching, yiFor
Breakdown voltage.The data x that sample data is concentratedi(i=1,2 ..., n) high-dimensional feature space F is mapped to by former space R, and
Support vector regression prediction model is constructed in feature space F, i.e.,：
F (x)=w ψ (xi)+b (1)
Wherein, Ψ (xi) it is xiNonlinear Mapping, b is threshold value, and w is regression coefficient vector.
Step 9.1.2：The parameter in Support vector regression prediction model is obtained according to risk function；
The factor for influencing w has the summation of experience risk and keeps it flat in high-dimensional feature space | | w | |2, by drawing
Enter the relaxation factor of positive definite, w and b can be obtained by regular risk function：
Wherein, C is a constant, the penalty of description empiric risk is indicated, for controlling to the sample beyond error ε
Punishment degree, l be total training sample number, ξ and ξiFor the relaxation factor of positive definite, (| | w | |2)/2 are to keep w flat in higher dimensional space
Smooth regular terms.The problem is solved, needs to introduce insensitive loss function Lε(yi, f (xi)), it is defined by the formula：
Wherein, ε is the error of predicted value.Constrained optimization problem can be obtained by establishing following equation solution：
Above formula is set to be minimized, L (w, ξ in formulai, ξ* i) to w, ξi、ξ* i, b local derviation be zero, i.e.,：
In formula, αiAnd αi *For Lagrange multiplier (i=1,2 ... ..., l), the function regression problem of support vector machines can return
Become a convex quadratic regression problem.It can obtain the w indicated with sample number strong point：
Step 9.1.3：Kernel function is selected, final Support vector regression prediction model is obtained.
It brings formula (1) into, finally obtains linear regression function, i.e. Support vector regression prediction model：
Wherein, K (xi, x) and it is kernel function, value is equal to former data (xi, x) and it is mapped to the inner product in high-dimensional feature space,
I.e.：
K(xi, x) and=Ψ (xi)×Ψ(x) (9)
Selection different form kernel function can generate different support vector machines, in the present embodiment：
K(xi, x) and=exp (- γ | | xi-x||) (10)
Wherein, the σ of kernel functional parameter γ=1/22,
Step 9.2：The prediction of breakdown voltage when progress mixed gas different ratio, when obtaining mixed gas different ratio
Breakdown voltage prediction result.
According to prediction result, using maximum absolutely percent error (MPE), mean absolute error (MAE), average absolute percentage
Error (MAPE) and related coefficient (R2) estimated performance of institute's established model is evaluated.
MPE, MAE, MAPE and R2It is defined respectively by following expression：
In formula：And yjThe predicted value and measured value of respectively j-th sample,For sample mean.
Claims (9)
1. a kind of mixed gas breakdown voltage detection device, which is characterized in that including：
High voltage power supply generation device and several mixed gas breakdown voltage detection units；
Mixed gas breakdown voltage detection unit includes gas sealing system, RC divider, switch, switch motion control system
And oscillograph；
Gas sealing system includes：Sealing chamber (1), gas charge and discharge and retracting device (2), positive electrode (3), negative electrode (4)；Positive electricity
Pole (3), negative electrode (4) setting are in sealing chamber (1), and the distance between positive electrode (3), negative electrode (4) are adjustable, sealing chamber (1)
Gas charge and discharge and retracting device (2) one end are connected by tracheae；
The positive electrode (3) of gas sealing system, negative electrode (4) respectively with the positive output end of high voltage power supply generation device, negative output
End connection；
Switch motion control is connected in the connection line of each gas sealing system and high voltage power supply generation device positive output end is
System；
Gas sealing system is connected with switch in the connection line of switch motion control system；
The high-pressure side of RC divider is connected in the connection line of high voltage power supply generation device and switch, RC divider it is low
Press bond oscillograph, the ground terminal ground connection of RC divider.
2. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that the high voltage power supply generates
Device includes：Capacitance, diode, resistance, transformer, pressure regulator, power frequency AC；
Power frequency AC connects pressure regulator, and pressure regulator connects primary coil of transformer, secondary coil one end connection the of transformer
Two resistance one end, negative output terminal as high voltage power supply generation device after secondary coil one end of transformer is connect with capacitance one end,
The second resistance other end connects diode cathode, and diode cathode is used as high voltage power supply generation device after being connect with the capacitance other end
Positive output end.
3. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that the switch motion control
System includes：Current transformer, comparing element, 3rd resistor；
The input of current transformer is connected to the connection line of gas sealing system and high voltage power supply generation device positive output end, electricity
The output end of current transformer is connected to the input terminal of comparing element, the output end connecting valve of comparing element through 3rd resistor.
4. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that the gas sealing system
Further include：Gas cylinder (5), air valve (6), vacuum meter (7), air gauge (8)；
Gas charge and discharge and retracting device (2) other end connection gas cylinder (5), gas charge and discharge and retracting device (2) connect with sealing chamber (1)
It is provided with air valve (6) in the tracheae connect, and vacuum meter (7) and air gauge (8) are installed.
5. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that the positive electrode (3) is born
Electrode (4) uses plate electrode, stick-plate electrode or needle to board electrode.
6. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that the high voltage power supply generates
The first resistor for protection circuit is connected in the connection line of device positive output end and RC divider high-pressure side.
7. mixed gas breakdown voltage detection device according to claim 1, which is characterized in that
The high voltage power supply generation device includes：Capacitance, diode, second resistance, transformer, pressure regulator, power frequency AC；
Power frequency AC connects pressure regulator, and pressure regulator connects primary coil of transformer, secondary coil one end connection the of transformer
Two resistance one end, negative output terminal as high voltage power supply generation device after secondary coil one end of transformer is connect with capacitance one end,
The second resistance other end connects diode cathode, and diode cathode is used as high voltage power supply generation device after being connect with the capacitance other end
Positive output end；
The switch motion control system includes：Current transformer, comparing element, 3rd resistor；
The input of current transformer is connected to the connection line of gas sealing system and high voltage power supply generation device positive output end, electricity
The output end of current transformer is connected to the input terminal of comparing element, the output end connecting valve of comparing element through 3rd resistor；
The gas sealing system further includes：Gas cylinder (5), air valve (6), vacuum meter (7), air gauge (8)；
Sealing chamber (1) connects gas charge and discharge by tracheae and retracting device (2) one end, gas charge and discharge and retracting device (2) are another
It is provided with air valve (6) in the tracheae that end connection gas cylinder (5), gas charge and discharge and retracting device (2) are connect with sealing chamber (1), and is pacified
Equipped with vacuum meter (7) and air gauge (8).
8. carrying out the side of mixed gas breakdown voltage prediction using mixed gas breakdown voltage detection device described in claim 1
Method, which is characterized in that including：
Step 1：Adjust the distance between positive electrode and negative electrode in sealing chamber；
Step 2：Gas remaining in sealing chamber is removed using gas charge and discharge and retracting device；
Step 3：Under switch closed condition, inflated into sealing chamber according to the different ratio of required mixed gas；
Step 4：Using high voltage power supply generation device between the positive electrode and negative electrode in the sealing chamber of each gas sealing system
Apply and continues raised voltage；
Step 5：When the positive electrode in sealing chamber is with negative electrode gap breakdown, switch motion control system works, in circuit
Switch disconnects；
Step 6：Breakdown voltage at this time is shown after RC divider is depressured in oscillograph；
Step 7：Step 4~6 are repeated, until the indoor positive electrode of all closings, negative electrode are breakdown, high voltage power supply generation device
Stop power supply；
Step 8：Mixed gas is extracted out using gas charge and discharge and retracting device；
Step 9：The data that the mixed gases matching detected and breakdown voltage form are predicted as mixed gas breakdown voltage
Sample data, predict mixed gas different ratio when breakdown voltage；
Step 9.1：Establish by input, breakdown voltage of the mixed gases matching in sample data is that the support vector machines exported is returned
Return prediction model；
Step 9.2：The prediction of breakdown voltage when progress mixed gas different ratio, hitting when obtaining mixed gas different ratio
Wear voltage prediction result.
9. the method for mixed gas breakdown voltage prediction according to claim 8, which is characterized in that the step 9.1
It is as follows：
Step 9.1.1：Data in sample data are mapped to high-dimensional feature space, and constructs and supports in high-dimensional feature space
Vector machine regressive prediction model；
Step 9.1.2：The parameter in Support vector regression prediction model is obtained according to risk function；
Step 9.1.3：Kernel function is selected, final Support vector regression prediction model is obtained.
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| CN106872644A (en) * | 2016-08-01 | 2017-06-20 | 中国电力科学研究院 | Extra-high-voltage alternating current GIL mixed gas analyte and component detection method |
| CN106405359A (en) * | 2016-11-17 | 2017-02-15 | 西北核技术研究所 | Insulating oil test oil cup for 100 kV pulse voltage |
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