CN108666009A - A Medium and High Voltage Electrical Equipment Insulation and Arc Extinguishing Medium and Its Selection Method - Google Patents
A Medium and High Voltage Electrical Equipment Insulation and Arc Extinguishing Medium and Its Selection Method Download PDFInfo
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- 238000009413 insulation Methods 0.000 title claims abstract description 38
- 238000010187 selection method Methods 0.000 title claims abstract description 8
- IYRWEQXVUNLMAY-UHFFFAOYSA-N carbonyl fluoride Chemical compound FC(F)=O IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000007789 gas Substances 0.000 claims description 111
- 229920006395 saturated elastomer Polymers 0.000 claims description 41
- 230000015556 catabolic process Effects 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 24
- 238000002474 experimental method Methods 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000000342 Monte Carlo simulation Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 2
- 229910018503 SF6 Inorganic materials 0.000 abstract description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 150000002576 ketones Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- QJPLLYVRTUXAHZ-UHFFFAOYSA-N 1,1,1,3,3,4,4,4-octafluorobutan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)F QJPLLYVRTUXAHZ-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
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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
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- Gas-Insulated Switchgears (AREA)
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Abstract
本申请提供了一种中高压电气设备绝缘和灭弧介质及其选取方法，所述绝缘和灭弧介质为全氟酮混合气体，全氟酮混合气体具有绝缘强度高，温室效应低，可替代六氟化硫作为新一代气体绝缘和灭弧介质，可广泛应用于气体绝缘变压器、气体绝缘组合电器、气体绝缘输电管道等高压电气设备。通过本申请提供的选取方法可以简单、高效地选取出适合不同环境温度下不同中高压电气设备的绝缘和灭弧介质的比例，获得综合性能最优的绝缘和灭弧介质。
The application provides an insulating and arc-extinguishing medium for medium and high-voltage electrical equipment and a selection method thereof. The insulating and arc-extinguishing medium is a mixed gas of perfluoroketone. The mixed gas of perfluoroketone has high insulation strength and low greenhouse effect, and can replace As a new generation of gas insulation and arc extinguishing medium, sulfur hexafluoride can be widely used in high-voltage electrical equipment such as gas-insulated transformers, gas-insulated combined electrical appliances, and gas-insulated transmission pipelines. The selection method provided in this application can simply and efficiently select the proportion of insulation and arc extinguishing medium suitable for different medium and high voltage electrical equipment under different ambient temperatures, and obtain the insulation and arc extinguishing medium with the best comprehensive performance.
Description
技术领域technical field
本申请涉及绝缘介质领域，尤其涉及一种中高压电气设备绝缘和灭弧介质及其选取方法。The present application relates to the field of insulating media, in particular to an insulating and arc-extinguishing medium for medium and high voltage electrical equipment and a selection method thereof.
背景技术Background technique
六氟化硫(SF6)气体具有优良的绝缘与灭弧性能，以其作为绝缘和灭弧介质的电力设备在110kV以上系统中占绝对主导地位。但是，SF6气体在应用中面临着两个非常严重的问题：①SF6气体是一种严重的温室效应气体，其全球变暖潜能(global warmingpotential,GWP)大约为二氧化碳(CO2)的23900倍，并在1997年签订的《京都议定书》中被列入排放受限制的6种温室效应气体之一；②SF6气体的液化温度较高，限制了其在高寒地区的应用，如0.1MPa和0.6MPa时SF6气体的液化温度分别约为-64℃和-25℃，而0.1MPa和0.6MPa时CO2的液化温度分别约为-78.5℃和-53℃。Sulfur hexafluoride (SF 6 ) gas has excellent insulation and arc extinguishing properties, and power equipment using it as insulation and arc extinguishing medium occupies an absolute dominant position in systems above 110kV. However, the application of SF 6 gas faces two very serious problems: ① SF 6 gas is a serious greenhouse gas, and its global warming potential (global warming potential, GWP) is about 23900 times that of carbon dioxide (CO 2 ) , and was included in the "Kyoto Protocol" signed in 1997 as one of the six greenhouse effect gases with restricted emissions; ②The high liquefaction temperature of SF 6 gas limits its application in alpine regions, such as 0.1MPa and 0.6 The liquefaction temperatures of SF6 gas at MPa are about -64°C and -25°C, respectively, while the liquefaction temperatures of CO2 at 0.1MPa and 0.6MPa are about -78.5°C and -53°C, respectively.
目前，氮气(N2)和干燥空气也被作为绝缘介质用于中压环网柜等设备中，含少量SF6气体的SF6-N2混合气体已成功应用于气体绝缘变压器和气体绝缘管道等设备中，同时还研究了其他SF6混合气体、干燥空气、CO2等。然而，由于N2和干燥空气绝缘强度较低，仅为SF6气体的三分之一左右，导致以其为绝缘介质的设备体积较大、充气压力较高、成本较高，并且SF6气体含量依然较高，对环境的威胁依然较大。At present, nitrogen (N 2 ) and dry air are also used as insulating medium in equipment such as medium-voltage ring network cabinets, and SF 6 -N 2 mixed gas containing a small amount of SF 6 gas has been successfully used in gas-insulated transformers and gas-insulated pipelines And other equipment, also studied other SF 6 mixed gas, dry air, CO 2 and so on. However, due to the low insulation strength of N 2 and dry air, which is only about one-third of that of SF 6 gas, the equipment using it as the insulating medium has larger volume, higher inflation pressure, and higher cost, and SF 6 gas The content is still high, and the threat to the environment is still relatively large.
发明内容Contents of the invention
本申请提供了一种中高压电气设备绝缘和灭弧介质及其选取方法，以解决现有绝缘和灭弧介质绝缘性能低、对环境威胁大的问题。The present application provides an insulation and arc extinguishing medium for medium and high voltage electrical equipment and a selection method thereof, so as to solve the problems of low insulation performance of the existing insulation and arc extinguishing medium and great threat to the environment.
第一方面，本申请提供了一种中高压电气设备绝缘和灭弧介质的选取方法，所述绝缘和灭弧介质为全氟酮混合气体，所述选取方法包括：In the first aspect, the present application provides a method for selecting the insulation and arc extinguishing medium of medium and high voltage electrical equipment. The insulation and arc extinguishing medium is a mixed gas of perfluoroketone. The selection method includes:
获取所述中高压电气设备所应用的环境温度和中高压电气设备的充气压力阈值；Obtaining the ambient temperature used by the medium and high voltage electrical equipment and the inflation pressure threshold of the medium and high voltage electrical equipment;
根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压和临界击穿场强；According to the ambient temperature, the saturated vapor pressure and critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios are obtained;
根据所述充气压力阈值选取饱和蒸气压满足要求的多个不同混合比例的全氟酮混合气体；Select a plurality of perfluoroketone mixed gases with different mixing ratios whose saturated vapor pressure meets the requirements according to the inflation pressure threshold;
比较所选取的多个不同混合比例的全氟酮混合气体对应的临界击穿场强，将数值最大的临界击穿场强所对应混合比例的全氟酮混合气体作为所述中高压电气设备用绝缘介质。Comparing the critical breakdown field strengths corresponding to multiple selected perfluoroketone mixed gases with different mixing ratios, and using the mixed gas with the largest critical breakdown field strength corresponding to the mixed ratio of perfluoroketone mixed gases for the medium and high voltage electrical equipment insulating medium.
优选的，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压，包括：Preferably, according to the ambient temperature, the saturated vapor pressure corresponding to the mixed gas of perfluoroketone in different mixing ratios is obtained, including:
采用克劳修斯—克莱普朗方程或者安托因方程得到所述环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压。The saturation vapor pressure corresponding to the perfluoroketone mixed gas with different mixing ratios at the ambient temperature is obtained by using the Clausius-Claiplan equation or the Antoine equation.
优选的，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压，包括：Preferably, according to the ambient temperature, the saturated vapor pressure corresponding to the mixed gas of perfluoroketone in different mixing ratios is obtained, including:
查询饱和蒸气压表，得到所述环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压；Query the saturated vapor pressure table to obtain the saturated vapor pressure corresponding to the mixed gas of perfluoroketone with different mixing ratios at the ambient temperature;
其中，所述饱和蒸气压表中保存了在不同环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压。Wherein, the saturated vapor pressure table stores the saturated vapor pressures corresponding to the mixed gases of perfluoroketone with different mixing ratios at different ambient temperatures.
优选的，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的临界击穿场强，包括：Preferably, according to the ambient temperature, the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios is obtained, including:
在所述环境温度下，根据预设实验或计算方法确定不同混合比例的全氟酮混合气体对应的临界击穿场强；At the ambient temperature, determine the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios according to preset experiments or calculation methods;
其中，所述预设实验方法包括以下实验方法中的任一种：击穿实验、脉冲汤逊实验、稳态汤逊实验，所述计算方法包括以下方法中的任一种：玻尔兹曼解析法、蒙特卡洛模拟法。Wherein, the preset experimental method includes any one of the following experimental methods: breakdown experiment, pulse Thomson experiment, steady-state Thomson experiment, and the calculation method includes any one of the following methods: Boltzmann Analytical method, Monte Carlo simulation method.
优选的，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的临界击穿场强，包括：Preferably, according to the ambient temperature, the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios is obtained, including:
查询临界击穿场强表，确定所述环境温度下不同混合比例的全氟酮混合气体对应的临界击穿场强；Query the critical breakdown field strength table to determine the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios at the ambient temperature;
其中，所述临界击穿场强表中保存了在不同环境温度下不同混合比例的全氟酮混合气体对应的临界击穿场强。Wherein, the critical breakdown field strength table stores the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios at different ambient temperatures.
第二方面，本申请还提供了一种中高压电气设备绝缘和灭弧介质，所述中高压电气设备绝缘和灭弧介质为全氟酮混合气体，所述全氟酮混合气体包括C5F10O和缓冲气体；其中所述C5F10O的分压为所述中高压电气设备使用最低温度下C5F10O气体饱和蒸汽压的80％～120％。In the second aspect, the present application also provides an insulation and arc extinguishing medium for medium and high voltage electrical equipment, wherein the insulation and arc extinguishing medium for medium and high voltage electrical equipment is a mixed gas of perfluoroketone, and the mixed gas of perfluoroketone includes C 5 F 10 O and buffer gas; wherein the partial pressure of the C 5 F 10 O is 80% to 120% of the saturated vapor pressure of the C 5 F 10 O gas at the lowest temperature used by the medium and high voltage electrical equipment.
优选的，所述全氟酮混合气体混合气体还包括C6F12O；其中，所述C6F12O的分压为所述中高压电气设备使用最低温度下C6F12O气体饱和蒸汽压的80％～120％。Preferably, the perfluoroketone mixed gas mixed gas also includes C 6 F 12 O; wherein, the partial pressure of the C 6 F 12 O is that the medium and high voltage electrical equipment is saturated with C 6 F 12 O gas at the lowest temperature. 80% to 120% of the vapor pressure.
优选的，所述全氟酮混合气体混合气体还包括C4F8O；其中，所述C4F8O的分压为所述中高压电气设备使用最低温度下C4F8O气体饱和蒸汽压的80％～120％。Preferably, the perfluoroketone mixed gas mixed gas also includes C 4 F 8 O; wherein, the partial pressure of the C 4 F 8 O is 80% of the saturated vapor pressure of the C4F8O gas at the lowest temperature used by the medium and high voltage electrical equipment. %~120%.
优选的，所述缓冲气体为空气、氮气、二氧化碳中的一种。Preferably, the buffer gas is one of air, nitrogen, and carbon dioxide.
由以上技术方案可知，一方面本申请提供了一种中高压电气设备绝缘和灭弧介质的选取方法，包括，获取所述中高压电气设备所应用的环境温度和中高压电气设备的充气压力阈值；根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压和临界击穿场强；根据所述充气压力阈值选取饱和蒸气压满足要求的多个不同混合比例的全氟酮混合气体；比较所选取的多个不同混合比例的全氟酮混合气体对应的临界击穿场强，将数值最大的临界击穿场强所对应的混合比例的全氟酮混合气体作为所述中高压电气设备用绝缘介质。通过本方法可以简单、高效地选取出适合不同环境温度下不同高压电气设备的绝缘和或灭弧介质的比例，获得综合性能最优的绝缘和或灭弧介质。It can be seen from the above technical solutions that, on the one hand, the present application provides a method for selecting insulation and arc extinguishing medium for medium and high voltage electrical equipment, including obtaining the ambient temperature used by the medium and high voltage electrical equipment and the inflation pressure threshold of the medium and high voltage electrical equipment ;According to the ambient temperature, the saturated vapor pressure and critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios are obtained; according to the inflation pressure threshold, a plurality of perfluoroketones with different mixing ratios whose saturated vapor pressure meets the requirements are selected. Ketone mixed gas; compare the critical breakdown field strengths corresponding to the selected perfluoroketone mixed gases with different mixing ratios, and use the perfluoroketone mixed gas corresponding to the mixing ratio of the critical breakdown field strength with the largest numerical value as the described Insulation medium for medium and high voltage electrical equipment. The method can simply and efficiently select the proportion of the insulating and/or arc-extinguishing medium suitable for different high-voltage electrical equipment under different ambient temperatures, and obtain the insulating and/or arc-extinguishing medium with the best comprehensive performance.
另一方面，本方法提供的一种中高压电气设备绝缘和灭弧介质采用全氟酮混合气体作为绝缘和/或灭弧的介质，具有绝缘强度高，温室效应低，可替代六氟化硫作为新一代气体绝缘和灭弧介质，可广泛应用于气体绝缘变压器、气体绝缘组合电器、气体绝缘输电管道等高压电气设备。On the other hand, the medium and high voltage electrical equipment insulation and arc extinguishing medium provided by this method uses perfluoroketone mixed gas as the insulation and/or arc extinguishing medium, which has high dielectric strength and low greenhouse effect, and can replace sulfur hexafluoride As a new generation of gas-insulated and arc-extinguishing medium, it can be widely used in high-voltage electrical equipment such as gas-insulated transformers, gas-insulated combined electrical appliances, and gas-insulated transmission pipelines.
附图说明Description of drawings
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to illustrate the technical solution of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative work, Additional drawings can also be derived from these drawings.
图1为本申请的一种中高压电气设备绝缘和灭弧介质的选取方法的流程图。Fig. 1 is a flowchart of a method for selecting insulation and arc extinguishing medium for medium and high voltage electrical equipment of the present application.
具体实施方式Detailed ways
下面结合本申请中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是本申请还可以采用其他不同于再次描述的其他方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似推广，因此本申请不受下面公开的具体实施例的限制。In the following description, a lot of specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways that are different from the description again, and those skilled in the art can do similar without violating the connotation of the application Generalization, therefore, this application is not limited by the specific examples disclosed below.
参见图1，图1为本申请的一种中高压电气设备绝缘和灭弧介质的选取方法的流程图。本申请提供的中高压电气设备绝缘和灭弧介质的选取方法，所述绝缘和灭弧介质为全氟酮混合气体，所述选取方法包括：Referring to Fig. 1, Fig. 1 is a flowchart of a method for selecting insulation and arc extinguishing medium for medium and high voltage electrical equipment of the present application. The application provides a method for selecting insulation and arc extinguishing medium for medium and high voltage electrical equipment, the insulation and arc extinguishing medium is perfluoroketone mixed gas, and the selection method includes:
步骤S11、获取所述中高压电气设备所应用的环境温度和中高压电气设备的充气压力阈值；Step S11, obtaining the ambient temperature used by the medium and high voltage electrical equipment and the inflation pressure threshold of the medium and high voltage electrical equipment;
步骤S12、根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压和临界击穿场强；Step S12, according to the ambient temperature, obtain the saturated vapor pressure and critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios;
在密闭条件中，在一定温度下，与固体或液体处于相平衡的蒸气所具有的压强称为饱和蒸气压。同一物质在不同温度下有不同的饱和蒸气压，并随着温度的升高而增大。纯溶剂的饱和蒸气压大于溶液的饱和蒸气压；对于同一物质，固态的饱和蒸气压小于液态的饱和蒸气压。In a closed condition, at a certain temperature, the pressure of a vapor in phase equilibrium with a solid or a liquid is called the saturated vapor pressure. The same substance has different saturated vapor pressure at different temperatures, and it increases with the increase of temperature. The saturated vapor pressure of a pure solvent is greater than that of a solution; for the same substance, the saturated vapor pressure of a solid is less than that of a liquid.
步骤S13、根据所述充气压力阈值选取饱和蒸气压满足要求的多个不同混合比例的全氟酮混合气体；Step S13, selecting a plurality of perfluoroketone mixed gases with different mixing ratios whose saturated vapor pressure meets the requirements according to the inflation pressure threshold;
步骤S14、比较所选取的多个不同混合比例的全氟酮混合气体对应的临界击穿场强，将数值最大的临界击穿场强所对应混合比例的全氟酮混合气体作为所述中高压电气设备用绝缘介质。Step S14. Comparing the critical breakdown field strengths corresponding to the selected multiple perfluoroketone mixed gases with different mixing ratios, and using the mixed gas with the largest critical breakdown field strength as the medium and high pressure Insulation medium for electrical equipment.
可选地，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压，包括：Optionally, according to the ambient temperature, the saturated vapor pressure corresponding to the mixed gas of perfluoroketone in different mixing ratios is obtained, including:
采用克劳修斯—克莱普朗方程或者安托因方程得到所述环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压。The saturation vapor pressure corresponding to the perfluoroketone mixed gas with different mixing ratios at the ambient temperature is obtained by using the Clausius-Claiplan equation or the Antoine equation.
可选地，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压，包括：Optionally, according to the ambient temperature, the saturated vapor pressure corresponding to the mixed gas of perfluoroketone in different mixing ratios is obtained, including:
查询饱和蒸气压表，得到所述环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压；Query the saturated vapor pressure table to obtain the saturated vapor pressure corresponding to the mixed gas of perfluoroketone with different mixing ratios at the ambient temperature;
其中，所述饱和蒸气压表中保存了在不同环境温度下不同混合比例的全氟酮混合气体对应的饱和蒸气压。Wherein, the saturated vapor pressure table stores the saturated vapor pressures corresponding to the mixed gases of perfluoroketone with different mixing ratios at different ambient temperatures.
可选地，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的临界击穿场强，包括：Optionally, according to the ambient temperature, the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios is obtained, including:
在所述环境温度下，根据预设实验或计算方法确定不同混合比例的全氟酮混合气体对应的临界击穿场强；At the ambient temperature, determine the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios according to preset experiments or calculation methods;
其中，所述预设实验方法包括以下实验方法中的任一种：击穿实验、脉冲汤逊实验、稳态汤逊实验，所述计算方法包括以下方法中的任一种：玻尔兹曼解析法、蒙特卡洛模拟法。Wherein, the preset experimental method includes any one of the following experimental methods: breakdown experiment, pulse Thomson experiment, steady-state Thomson experiment, and the calculation method includes any one of the following methods: Boltzmann Analytical method, Monte Carlo simulation method.
可选地，所述根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的临界击穿场强，包括：Optionally, according to the ambient temperature, the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios is obtained, including:
查询临界击穿场强表，确定所述环境温度下不同混合比例的全氟酮混合气体对应的临界击穿场强；Query the critical breakdown field strength table to determine the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios at the ambient temperature;
其中，所述临界击穿场强表中保存了在不同环境温度下不同混合比例的全氟酮混合气体对应的临界击穿场强。Wherein, the critical breakdown field strength table stores the critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios at different ambient temperatures.
另一方面，本申请提供了一种中高压电气设备绝缘和灭弧介质，所述中高压电气设备绝缘和灭弧介质为全氟酮混合气体，所述全氟酮混合气体包括C5F10O(十氟-3-甲基丁-2-酮)和缓冲气体；其中所述C5F10O的分压为所述中高压电气设备使用最低温度下C5F10O气体饱和蒸汽压的80％～120％。即所述全氟酮混合气体可以为C5F10O和缓冲气体的二元混合气体。On the other hand, the present application provides an insulation and arc extinguishing medium for medium and high voltage electrical equipment. The insulation and arc extinguishing medium for medium and high voltage electrical equipment is a perfluoroketone mixed gas, and the perfluoroketone mixed gas includes C 5 F 10 O (decafluoro-3-methylbutan-2-one) and buffer gas; wherein the partial pressure of C 5 F 10 O is the saturated vapor pressure of C 5 F 10 O gas at the lowest temperature used by the medium and high voltage electrical equipment 80% to 120% of that. That is, the perfluoroketone mixed gas may be a binary mixed gas of C 5 F 10 O and buffer gas.
可选地，所述全氟酮混合气体混合气体还包括C6F12O(十二氟-2-甲基戊-3-酮)；其中，所述C6F12O的分压为所述中高压电气设备使用最低温度下C6F12O气体饱和蒸汽压的80％～120％。即所述全氟酮混合气体可以为C5F10O、C6F12O和缓冲气体的三元混合气体。Optionally, the perfluoroketone mixed gas mixed gas also includes C 6 F 12 O (dodecafluoro-2-methylpentan-3-one); wherein, the partial pressure of the C 6 F 12 O is The medium and high voltage electrical equipment mentioned above uses 80% to 120% of the saturated vapor pressure of C 6 F 12 O gas at the lowest temperature. That is, the perfluoroketone mixed gas may be a ternary mixed gas of C 5 F 10 O, C 6 F 12 O and buffer gas.
可选地，所述全氟酮混合气体混合气体还包括C4F8O(八氟丁-2-酮)；其中，所述C4F8O的分压为所述中高压电气设备使用最低温度下C4F8O气体饱和蒸汽压的80％～120％。即所述全氟酮混合气体可以为C5F10O、C4F8O和缓冲气体的三元混合气体。Optionally, the perfluoroketone mixed gas mixed gas also includes C 4 F 8 O (octafluorobutan-2-one); wherein, the partial pressure of the C 4 F 8 O is used for the medium and high voltage electrical equipment 80% to 120% of the saturated vapor pressure of C 4 F 8 O gas at the lowest temperature. That is, the perfluoroketone mixed gas may be a ternary mixed gas of C 5 F 10 O, C 4 F 8 O and buffer gas.
可选地，所述缓冲气体为空气、氮气、二氧化碳中的一种。Optionally, the buffer gas is one of air, nitrogen, and carbon dioxide.
氟酮类气体的GWP值较低，如C5F10O和C6F12O约为1，对臭氧层无破坏性，绝缘强度高于纯SF6气体，但其液化温度较高，如C5F10O和C6F12O气体在一个大气压下分别约为26.5℃和49℃，无法单独作为绝缘和灭弧介质应用于中/高压电气设备中。但在其中充入一定量的液化温度较低的缓冲气体即可降低其液化温度，进而应用于电气设备中。The GWP value of fluoroketone gas is low, such as C 5 F 10 O and C 6 F 12 O are about 1, it is not destructive to the ozone layer, and its dielectric strength is higher than that of pure SF 6 gas, but its liquefaction temperature is higher, such as C 5 F 10 O and C 6 F 12 O gases are about 26.5°C and 49°C respectively at one atmospheric pressure, and cannot be used alone as insulation and arc extinguishing media in medium/high voltage electrical equipment. But filling it with a certain amount of buffer gas with a lower liquefaction temperature can lower its liquefaction temperature, and then it can be applied to electrical equipment.
由以上技术方案可知，一方面本申请提供了一种中高压电气设备绝缘和灭弧介质的选取方法，包括，获取所述中高压电气设备所应用的环境温度和中高压电气设备的充气压力阈值；根据所述环境温度，得到不同混合比例的全氟酮混合气体对应的饱和蒸气压和临界击穿场强；根据所述充气压力阈值选取饱和蒸气压满足要求的多个不同混合比例的全氟酮混合气体；比较所选取的多个不同混合比例的全氟酮混合气体对应的临界击穿场强，将数值最大的临界击穿场强所对应的混合比例的全氟酮混合气体作为所述中高压电气设备用绝缘介质。通过本方法可以简单、高效地选取出适合不同环境温度下不同高压电气设备的绝缘和或灭弧介质的比例，获得综合性能最优的绝缘和或灭弧介质。It can be seen from the above technical solutions that, on the one hand, the present application provides a method for selecting insulation and arc extinguishing medium for medium and high voltage electrical equipment, including obtaining the ambient temperature used by the medium and high voltage electrical equipment and the inflation pressure threshold of the medium and high voltage electrical equipment ;According to the ambient temperature, the saturated vapor pressure and critical breakdown field strength corresponding to the perfluoroketone mixed gas with different mixing ratios are obtained; according to the inflation pressure threshold, a plurality of perfluoroketones with different mixing ratios whose saturated vapor pressure meets the requirements are selected. Ketone mixed gas; compare the critical breakdown field strengths corresponding to the selected perfluoroketone mixed gases with different mixing ratios, and use the perfluoroketone mixed gas corresponding to the mixing ratio of the largest critical breakdown field strength as the described Insulation medium for medium and high voltage electrical equipment. The method can simply and efficiently select the proportion of the insulating and/or arc-extinguishing medium suitable for different high-voltage electrical equipment under different ambient temperatures, and obtain the insulating and/or arc-extinguishing medium with the best comprehensive performance.
另一方面，本方法提供的一种中高压电气设备绝缘和灭弧介质采用全氟酮混合气体作为绝缘和/或灭弧的介质，具有绝缘强度高，温室效应低，可替代六氟化硫作为新一代气体绝缘和灭弧介质，可广泛应用于气体绝缘变压器、气体绝缘组合电器、气体绝缘输电管道等高压电气设备。On the other hand, the medium and high voltage electrical equipment insulation and arc extinguishing medium provided by this method uses perfluoroketone mixed gas as the insulation and/or arc extinguishing medium, which has high dielectric strength and low greenhouse effect, and can replace sulfur hexafluoride As a new generation of gas-insulated and arc-extinguishing medium, it can be widely used in high-voltage electrical equipment such as gas-insulated transformers, gas-insulated combined electrical appliances, and gas-insulated transmission pipelines.
以上仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。The above are only specific implementation methods of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the application, and these improvements and modifications should also be considered as For the scope of protection of this application.
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