CN108666009A - A kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosing method - Google Patents
A kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosing method Download PDFInfo
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- CN108666009A CN108666009A CN201810398412.3A CN201810398412A CN108666009A CN 108666009 A CN108666009 A CN 108666009A CN 201810398412 A CN201810398412 A CN 201810398412A CN 108666009 A CN108666009 A CN 108666009A
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- gas
- perfluor ketone
- mixed gas
- mesohigh
- arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases
Abstract
This application provides a kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosing method, the insulation and arc-extinguishing medium are perfluor ketone mixed gas, perfluor ketone mixed gas has dielectric strength high, greenhouse effects are low, alternative sulfur hexafluoride can be widely applied to the high voltage electric equipments such as gas-insulated transformer, gas insulated combined electrical equipment, gas-insulated power transfer conduit as gas-insulated of new generation and arc-extinguishing medium.The ratio that the insulation and arc-extinguishing medium of different mesohigh electrical equipments at a temperature of suitable varying environment can be simply and efficiently selected by choosing method provided by the present application obtains comprehensive performance optimal insulation and arc-extinguishing medium.
Description
Technical field
This application involves dielectric field more particularly to a kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosings
Take method.
Background technology
Sulfur hexafluoride (SF6) gas is with excellent insulation and arc extinction performance, using it as the electricity of insulation and arc-extinguishing medium
Power equipment accounts for absolute leading position in 110kV system above.But SF6Gas is faced with two very seriously in the application
The problem of：①SF6Gas is a kind of serious greenhouse gases, global warming potential (global warming
Potential, GWP) it is about carbon dioxide (CO2) 23900 times, and in 1997 sign《The Kyoto Protocol》It is middle to be arranged
Enter to discharge one of restricted 6 kinds of greenhouse gases；②SF6The condensing temperature of gas is higher, limits it in extremely frigid zones
Application, SF when such as 0.1MPa and 0.6MPa6The condensing temperature of gas respectively may be about -64 DEG C and -25 DEG C, and 0.1MPa and
CO when 0.6MPa2Condensing temperature respectively may be about -78.5 DEG C and -53 DEG C.
Currently, nitrogen (N2) and dry air also by as dielectric in the equipment such as middle pressure ring main unit, containing on a small quantity
SF6The SF of gas6-N2Mixed gas has been successfully applied in the equipment such as gas-insulated transformer and gas isolated pipe, simultaneously also
Have studied other SF6Mixed gas, dry air, CO2Deng.However, due to N2It is relatively low with dry air dielectric strength, only SF6
One third of gas or so, leads to that larger using it as the equipment volume of dielectric, the blowing pressure is higher, cost is higher, and
And SF6Gas content is still higher, still larger to the threat of environment.
Invention content
This application provides a kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosing method, existing exhausted to solve
Edge and low, big to the environmental threat problem of arc-extinguishing medium insulation performance.
In a first aspect, this application provides a kind of choosing method of mesohigh insulation of electrical installation and arc-extinguishing medium, it is described
Insulation and arc-extinguishing medium are perfluor ketone mixed gas, and the choosing method includes：
Obtain the blowing pressure threshold value of environment temperature and mesohigh electrical equipment that the mesohigh electrical equipment is applied；
According to the environment temperature, obtains the corresponding saturated vapour pressure of perfluor ketone mixed gas of different mixing proportion and face
Boundary's disruptive field intensity；
The perfluor ketone for multiple and different mixed proportions that saturated vapour pressure is met the requirements is chosen according to the blowing pressure threshold value
Mixed gas；
The corresponding critical breakdown strength of perfluor ketone mixed gas for comparing selected multiple and different mixed proportions, by numerical value
The perfluor ketone mixed gas of mixed proportion corresponding to maximum critical breakdown strength insulate as the mesohigh electrical equipment
Medium.
Preferably, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion is corresponding full
And vapour pressure, including：
Different mixing ratios under the environment temperature are obtained using Clausius-Ke Laipulang equations or Antoine equation
The corresponding saturated vapour pressure of perfluor ketone mixed gas of example.
Preferably, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion is corresponding full
And vapour pressure, including：
Saturated vapour pressure table is inquired, the perfluor ketone mixed gas for obtaining different mixing proportion under the environment temperature is corresponding
Saturated vapour pressure；
Wherein, the perfluor ketone mixing of different mixing proportion at different ambient temperatures is saved in the saturated vapour pressure table
The corresponding saturated vapour pressure of gas.
Preferably, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion corresponding is faced
Boundary's disruptive field intensity, including：
Under the environment temperature, the perfluor ketone gaseous mixture of different mixing proportion is determined according to default experiment or computational methods
The corresponding critical breakdown strength of body；
Wherein, the default experimental method includes any one of following experimental method：Breakdown test, pulse Townsend are real
It tests, the experiment of stable state Townsend, the computational methods include any one of following methods：Boltzmann analytic method, Monte Carlo mould
Quasi- method.
Preferably, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion corresponding is faced
Boundary's disruptive field intensity, including：
Critical breakdown strength table is inquired, determines that the perfluor ketone mixed gas of different mixing proportion under the environment temperature corresponds to
Critical breakdown strength；
Wherein, the perfluor ketone that different mixing proportion at different ambient temperatures is saved in the critical breakdown strength table is mixed
Close the corresponding critical breakdown strength of gas.
Second aspect, present invention also provides a kind of mesohigh insulation of electrical installation and arc-extinguishing medium, the mesohigh electricity
Gas is apparatus insulated and arc-extinguishing medium is perfluor ketone mixed gas, and the perfluor ketone mixed gas includes C5F10O and buffer gas；Its
Described in C5F10The partial pressure of O is that the mesohigh electrical equipment uses C under minimum temperature5F10The 80% of O gas saturated vapor pressures
~120%.
Preferably, the perfluor ketone mixed gas mixed gas further includes C6F12O；Wherein, the C6F12The partial pressure of O is institute
It states mesohigh electrical equipment and uses C under minimum temperature6F12The 80%~120% of O gas saturated vapor pressures.
Preferably, the perfluor ketone mixed gas mixed gas further includes C4F8O；Wherein, the C4F8The partial pressure of O is institute
Mesohigh electrical equipment is stated using 80%~120% of C4F8O gas saturated vapor pressures under minimum temperature.
Preferably, the buffer gas is one kind in air, nitrogen, carbon dioxide.
By above technical scheme it is found that on the one hand this application provides a kind of mesohigh insulation of electrical installation and arc-extinguishing mediums
Choosing method, including, obtain the inflation of environment temperature and mesohigh electrical equipment that the mesohigh electrical equipment is applied
Pressure threshold；According to the environment temperature, obtain different mixing proportion the corresponding saturated vapour pressure of perfluor ketone mixed gas and
Critical breakdown strength；The complete of multiple and different mixed proportions that saturated vapour pressure is met the requirements is chosen according to the blowing pressure threshold value
Fluorine ketone mixed gas；Compare the corresponding critical breakdown strength of perfluor ketone mixed gas of selected multiple and different mixed proportions,
The perfluor ketone mixed gas of mixed proportion corresponding to the maximum critical breakdown strength of numerical value is electrically set as the mesohigh
Spare dielectric.Different high-voltage electrical apparatus are set at a temperature of can simply and efficiently selecting suitable varying environment by this method
The ratio of standby insulation and/or arc-extinguishing medium obtains comprehensive performance optimal insulation and/or arc-extinguishing medium.
On the other hand, a kind of mesohigh insulation of electrical installation and arc-extinguishing medium that this method provides use perfluor ketone gaseous mixture
Body has dielectric strength high as insulation and/or the medium of arc extinguishing, and greenhouse effects are low, and alternative sulfur hexafluoride is as a new generation
Gas-insulated and arc-extinguishing medium can be widely applied to gas-insulated transformer, gas insulated combined electrical equipment, gas-insulated electroduct
The high voltage electric equipments such as road.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the flow chart of a kind of mesohigh insulation of electrical installation of the application and the choosing method of arc-extinguishing medium.
Specific implementation mode
With reference to the attached drawing in the application, technical solutions in the embodiments of the present application is clearly and completely described,
Obviously, described embodiment is only a part of the embodiment of the application, instead of all the embodiments.Based in the application
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall within the protection scope of the present invention.
Many details are elaborated in the following description in order to fully understand the application, but the application can be with
It is different from the other modes that describe again using other to implement, those skilled in the art can be without prejudice to the application intension
In the case of do similar popularization, therefore the application is not limited by following public specific embodiment.
Referring to Fig. 1, Fig. 1 is the flow of a kind of mesohigh insulation of electrical installation of the application and the choosing method of arc-extinguishing medium
Figure.The choosing method of mesohigh insulation of electrical installation and arc-extinguishing medium provided by the present application, the insulation and arc-extinguishing medium are complete
Fluorine ketone mixed gas, the choosing method include：
Step S11, the inflation of environment temperature and mesohigh electrical equipment that the mesohigh electrical equipment is applied is obtained
Pressure threshold；
Step S12, according to the environment temperature, the corresponding saturation of perfluor ketone mixed gas for obtaining different mixing proportion is steamed
Air pressure and critical breakdown strength；
In confined condition, at a certain temperature, it is in pressure possessed by the steam to balance each other with solid or liquid and claims
For saturated vapour pressure.Same substance has different saturated vapour pressures at different temperatures, and increases with the raising of temperature.It is pure
The saturated vapour pressure of solvent is more than the saturated vapour pressure of solution；For same substance, solid saturated vapour pressure is less than liquid
Saturated vapour pressure.
Step S13, multiple and different mixed proportions that saturated vapour pressure is met the requirements are chosen according to the blowing pressure threshold value
Perfluor ketone mixed gas；
Step S14, the corresponding critical breakdown field of perfluor ketone mixed gas of multiple and different mixed proportions selected by comparison
By force, the perfluor ketone mixed gas of mixed proportion corresponding to the maximum critical breakdown strength of numerical value is electrically set as the mesohigh
Spare dielectric.
Optionally, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion is corresponding full
And vapour pressure, including：
Different mixing ratios under the environment temperature are obtained using Clausius-Ke Laipulang equations or Antoine equation
The corresponding saturated vapour pressure of perfluor ketone mixed gas of example.
Optionally, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion is corresponding full
And vapour pressure, including：
Saturated vapour pressure table is inquired, the perfluor ketone mixed gas for obtaining different mixing proportion under the environment temperature is corresponding
Saturated vapour pressure；
Wherein, the perfluor ketone mixing of different mixing proportion at different ambient temperatures is saved in the saturated vapour pressure table
The corresponding saturated vapour pressure of gas.
Optionally, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion corresponding is faced
Boundary's disruptive field intensity, including：
Under the environment temperature, the perfluor ketone gaseous mixture of different mixing proportion is determined according to default experiment or computational methods
The corresponding critical breakdown strength of body；
Wherein, the default experimental method includes any one of following experimental method：Breakdown test, pulse Townsend are real
It tests, the experiment of stable state Townsend, the computational methods include any one of following methods：Boltzmann analytic method, Monte Carlo mould
Quasi- method.
Optionally, described according to the environment temperature, the perfluor ketone mixed gas for obtaining different mixing proportion corresponding is faced
Boundary's disruptive field intensity, including：
Critical breakdown strength table is inquired, determines that the perfluor ketone mixed gas of different mixing proportion under the environment temperature corresponds to
Critical breakdown strength；
Wherein, the perfluor ketone that different mixing proportion at different ambient temperatures is saved in the critical breakdown strength table is mixed
Close the corresponding critical breakdown strength of gas.
On the other hand, this application provides a kind of mesohigh insulation of electrical installation and arc-extinguishing medium, the mesohigh is electrical
Apparatus insulated and arc-extinguishing medium is perfluor ketone mixed gas, and the perfluor ketone mixed gas includes C5F10O (ten fluoro- 3- methyl butyl-
2- ketone) and buffer gas；The wherein described C5F10The partial pressure of O is that the mesohigh electrical equipment uses C under minimum temperature5F10O gas
The 80%~120% of body saturated vapor pressure.The i.e. described perfluor ketone mixed gas can be C5F10The two end number mixing of O and buffer gas
Gas.
Optionally, the perfluor ketone mixed gas mixed gas further includes C6F12O (the 12 fluoro- amyl- 3- ketone of 2- methyl)；Its
In, the C6F12The partial pressure of O is that the mesohigh electrical equipment uses C under minimum temperature6F12The 80% of O gas saturated vapor pressures
~120%.The i.e. described perfluor ketone mixed gas can be C5F10O、C6F12The three-element mixed gas body of O and buffer gas.
Optionally, the perfluor ketone mixed gas mixed gas further includes C4F8O (octafluoro butyl- 2- ketone)；Wherein, described
C4F8The partial pressure of O is that the mesohigh electrical equipment uses C under minimum temperature4F8The 80%~120% of O gas saturated vapor pressures.
The i.e. described perfluor ketone mixed gas can be C5F10O、C4F8The three-element mixed gas body of O and buffer gas.
Optionally, the buffer gas is one kind in air, nitrogen, carbon dioxide.
The GWP value of fluorine ketone gas is relatively low, such as C5F10O and C6F12O is about 1, and to ozone layer without destructiveness, dielectric strength is high
In pure SF6Gas, but its condensing temperature is higher, such as C5F10O and C6F12O gases respectively may be about at one atm 26.5 DEG C and
49 DEG C, it can not be applied in medium/high voltage electrical equipment separately as insulation and arc-extinguishing medium.But it is filled with a certain amount of liquid wherein
Its condensing temperature can be reduced by changing the lower buffer gas of temperature, and then applied in electrical equipment.
By above technical scheme it is found that on the one hand this application provides a kind of mesohigh insulation of electrical installation and arc-extinguishing mediums
Choosing method, including, obtain the inflation of environment temperature and mesohigh electrical equipment that the mesohigh electrical equipment is applied
Pressure threshold；According to the environment temperature, obtain different mixing proportion the corresponding saturated vapour pressure of perfluor ketone mixed gas and
Critical breakdown strength；The complete of multiple and different mixed proportions that saturated vapour pressure is met the requirements is chosen according to the blowing pressure threshold value
Fluorine ketone mixed gas；Compare the corresponding critical breakdown strength of perfluor ketone mixed gas of selected multiple and different mixed proportions,
The perfluor ketone mixed gas of mixed proportion corresponding to the maximum critical breakdown strength of numerical value is electrically set as the mesohigh
Spare dielectric.Different high-voltage electrical apparatus are set at a temperature of can simply and efficiently selecting suitable varying environment by this method
The ratio of standby insulation and/or arc-extinguishing medium obtains comprehensive performance optimal insulation and/or arc-extinguishing medium.
On the other hand, a kind of mesohigh insulation of electrical installation and arc-extinguishing medium that this method provides use perfluor ketone gaseous mixture
Body has dielectric strength high as insulation and/or the medium of arc extinguishing, and greenhouse effects are low, and alternative sulfur hexafluoride is as a new generation
Gas-insulated and arc-extinguishing medium can be widely applied to gas-insulated transformer, gas insulated combined electrical equipment, gas-insulated electroduct
The high voltage electric equipments such as road.
It the above is only the specific implementation mode of the application, it is noted that those skilled in the art are come
It says, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
The protection domain of the application.
Claims (9)
1. a kind of choosing method of mesohigh insulation of electrical installation and arc-extinguishing medium, which is characterized in that the insulation and arc extinguishing are situated between
Matter is perfluor ketone mixed gas, and the choosing method includes：
Obtain the blowing pressure threshold value of environment temperature and mesohigh electrical equipment that the mesohigh electrical equipment is applied；
According to the environment temperature, obtains the corresponding saturated vapour pressure of perfluor ketone mixed gas of different mixing proportion and critical hit
Wear field strength；
The perfluor ketone mixing for multiple and different mixed proportions that saturated vapour pressure is met the requirements is chosen according to the blowing pressure threshold value
Gas；
The corresponding critical breakdown strength of perfluor ketone mixed gas for comparing selected multiple and different mixed proportions, by numerical value maximum
Critical breakdown strength corresponding to mixed proportion perfluor ketone mixed gas as the mesohigh electrical equipment dielectric.
2. according to the method described in claim 1, it is characterized in that：It is described according to the environment temperature, obtain different mixing ratios
The corresponding saturated vapour pressure of perfluor ketone mixed gas of example, including：
Different mixing proportion under the environment temperature is obtained using Clausius-Ke Laipulang equations or Antoine equation
The corresponding saturated vapour pressure of perfluor ketone mixed gas.
3. according to the method described in claim 1, it is characterized in that：It is described according to the environment temperature, obtain different mixing ratios
The corresponding saturated vapour pressure of perfluor ketone mixed gas of example, including：
Saturated vapour pressure table is inquired, the corresponding saturation of perfluor ketone mixed gas of different mixing proportion under the environment temperature is obtained
Vapour pressure；
Wherein, the perfluor ketone mixed gas of different mixing proportion at different ambient temperatures is saved in the saturated vapour pressure table
Corresponding saturated vapour pressure.
4. according to the method described in claim 1, it is characterized in that：It is described according to the environment temperature, obtain different mixing ratios
The corresponding critical breakdown strength of perfluor ketone mixed gas of example, including：
Under the environment temperature, the perfluor ketone mixed gas pair of different mixing proportion is determined according to default experiment or computational methods
The critical breakdown strength answered；
Wherein, the default experimental method includes any one of following experimental method：Breakdown test, pulse Townsend test, are steady
State Townsend is tested, and the computational methods include any one of following methods：Boltzmann analytic method, Monte Carlo Analogue Method.
5. according to the method described in claim 1, it is characterized in that：It is described according to the environment temperature, obtain different mixing ratios
The corresponding critical breakdown strength of perfluor ketone mixed gas of example, including：
Critical breakdown strength table is inquired, determines that the perfluor ketone mixed gas of different mixing proportion under the environment temperature is corresponding and faces
Boundary's disruptive field intensity；
Wherein, the perfluor ketone gaseous mixture of different mixing proportion at different ambient temperatures is saved in the critical breakdown strength table
The corresponding critical breakdown strength of body.
6. a kind of mesohigh insulation of electrical installation and arc-extinguishing medium chosen according to claim 1-5 any one of them methods,
It is characterized in that：The mesohigh insulation of electrical installation and arc-extinguishing medium are perfluor ketone mixed gas, the perfluor ketone gaseous mixture
Body includes C5F10O and buffer gas；The wherein described C5F10The partial pressure of O is that the mesohigh electrical equipment uses under minimum temperature
C5F10The 80%~120% of O gas saturated vapor pressures.
7. mesohigh insulation of electrical installation according to claim 6 and arc-extinguishing medium, it is characterised in that：The perfluor ketone is mixed
It further includes C to close gas mixing gas6F12O；Wherein, the C6F12The partial pressure of O is that the mesohigh electrical equipment uses lowest temperature
The lower C of degree6F12The 80%~120% of O gas saturated vapor pressures.
8. mesohigh insulation of electrical installation according to claim 6 and arc-extinguishing medium, it is characterised in that：The perfluor ketone is mixed
It further includes C to close gas mixing gas4F8O；Wherein, the C4F8The partial pressure of O is that the mesohigh electrical equipment uses minimum temperature
Lower C4F8The 80%~120% of O gas saturated vapor pressures.
9. mesohigh insulation of electrical installation according to claim 6 and arc-extinguishing medium, it is characterised in that：The buffer gas
For one kind in air, nitrogen, carbon dioxide.
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| CN201810398412.3A CN108666009A (en) | 2018-04-28 | 2018-04-28 | A kind of mesohigh insulation of electrical installation and arc-extinguishing medium and its choosing method |
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Cited By (6)
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| CN109599151A (en) * | 2018-11-30 | 2019-04-09 | 武汉大学 | A kind of perfluoroketone environment-friendly type substitution aerothermodynami emulation mode |
| CN110794272A (en) * | 2019-11-18 | 2020-02-14 | 广东电网有限责任公司 | Method, device and equipment for evaluating performance of insulating substitute gas |
| CN110807247A (en) * | 2019-10-09 | 2020-02-18 | 平高集团有限公司 | SF based on environmental protection6Alternative medium selection method |
| CN112362723A (en) * | 2020-10-29 | 2021-02-12 | 武汉大学 | SF based on steady-state Thomson principle6Substitute gas searching method and device |
| CN113257459A (en) * | 2021-05-17 | 2021-08-13 | 国网四川省电力公司电力科学研究院 | Perfluoropentanone mixed gas type electrical equipment insulating medium, preparation method and application |
| CN114121343A (en) * | 2021-10-25 | 2022-03-01 | 广东电网有限责任公司 | Binary mixed gas insulating medium, application thereof and electric power equipment containing gas insulating medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599151A (en) * | 2018-11-30 | 2019-04-09 | 武汉大学 | A kind of perfluoroketone environment-friendly type substitution aerothermodynami emulation mode |
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| CN110794272A (en) * | 2019-11-18 | 2020-02-14 | 广东电网有限责任公司 | Method, device and equipment for evaluating performance of insulating substitute gas |
| CN112362723A (en) * | 2020-10-29 | 2021-02-12 | 武汉大学 | SF based on steady-state Thomson principle6Substitute gas searching method and device |
| CN113257459A (en) * | 2021-05-17 | 2021-08-13 | 国网四川省电力公司电力科学研究院 | Perfluoropentanone mixed gas type electrical equipment insulating medium, preparation method and application |
| CN114121343A (en) * | 2021-10-25 | 2022-03-01 | 广东电网有限责任公司 | Binary mixed gas insulating medium, application thereof and electric power equipment containing gas insulating medium |
| CN114121343B (en) * | 2021-10-25 | 2022-09-30 | 广东电网有限责任公司 | Binary mixed gas insulating medium, application thereof and electric power equipment containing gas insulating medium |
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