Method and device for optimizing configuration of ternary mixed insulation gas, electronic equipment and medium

Abstract

The application discloses a ternary mixed insulation gas optimization configuration method and device, electronic equipment and medium, which are used to solve the problem that the research on the ternary mixed insulation gas is still in the initial stage, and the gas mixing method is not systematic and reasonable. The method comprises the following steps: obtaining a plurality of environmentally friendly insulation gases, and preliminarily selecting two first insulation gases and second insulation gases that meet preset gas screening conditions from the plurality of environmentally friendly insulation gases; based on the first insulation gases and the second insulation gases, a preset buffer gas is mixed to form an initial ternary mixed insulation gas; parameters of the initial ternary mixed insulation gas and SF6 gas are compared, and the initial ternary mixed insulation gas is optimized in mixing ratio according to the comparison result, so that a target ternary mixed insulation gas is obtained. Therefore, based on the parameter comparison and the optimization of the mixing ratio of the mixed insulation gas, the ternary mixed insulation gas with parameters comparable to those of the SF6 gas under the optimal configuration condition can be finally obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a method, device, electronic equipment and medium for optimizing the configuration of a ternary mixed insulating gas. Background Art

[0002] SF6 (sulfur hexafluoride) is a colorless, odorless, non-toxic, and chemically very stable gas. SF6 is widely used as an insulating and arc-extinguishing medium in power systems, particularly in high-voltage switchgear. Its excellent insulating and arc-extinguishing properties make SF6 an indispensable material in power systems.

[0003] With the rapid development of the power industry, the use of SF6 gas in high-voltage power equipment continues to grow rapidly in the absence of viable alternative technologies. The atmospheric concentration of SF6 gas is also increasing annually. SF6 gas has a strong greenhouse effect, making the search for environmentally friendly insulating gas alternatives to SF6 urgent. Researching environmentally friendly SF6 insulating gas alternatives has become a challenging task for researchers in the power industry.

[0004] The environmentally friendly insulating gases that are currently being studied include C4F7N (perfluoroisobutyronitrile), C5F 10 O (perfluoro-n-propyl vinyl ether), HFO-1336mzz (E) (trans-1,1,1,4,4,4-hexafluoro-2-butene), CF3I (trifluoroiodomethane), C6F 12 O (perfluorohexanone), HFO-1234ze (E) (CF3CH=CHF, trans-1,3,3,3-tetrafluoropropylene, industrial trans-1,3,3,3-tetrafluoropropylene), c-C4F8 (octafluorocyclobutane), CF3SO2F (trifluoromethylsulfonyl fluoride), etc.

[0005] At present, the research on ternary mixed insulating gas at home and abroad is still in its infancy, and no systematic and reasonable configuration scheme for ternary mixed insulating gas has been formed. Summary of the Invention

[0006] The present invention provides a method, device, electronic equipment and medium for optimizing the configuration of a ternary mixed insulating gas, which are used to solve or partially solve the technical problem that the current research on ternary mixed insulating gas is still in its infancy and the gas mixing method is not systematic and reasonable enough.

[0007] The present invention provides a method for optimizing the configuration of a ternary mixed insulating gas, the method comprising:

[0008] Access to a variety of environmentally friendly insulating gases;

[0009] Preliminarily selecting a first insulating gas and a second insulating gas that meet preset gas screening conditions from the multiple environmentally friendly insulating gases;

[0010] Based on the first insulating gas and the second insulating gas, a preset buffer gas is mixed to form an initial ternary mixed insulating gas;

[0011] Parameter comparison is performed on the initial ternary mixed insulating gas and SF6 gas, and based on the parameter comparison result, the mixing ratio of the initial ternary mixed insulating gas is optimized to obtain the target ternary mixed insulating gas.

[0012] Optionally, the performing parameter comparison between the initial ternary mixed insulating gas and SF6 gas, and optimizing the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain the target ternary mixed insulating gas includes:

[0013] Calculating the critical gas ratios of the first insulating gas and the second insulating gas in the initial ternary insulating gas mixture according to the liquefaction temperature requirement of the ternary insulating gas mixture;

[0014] respectively obtaining effective ionization coefficient curves of the first insulating gas, the second insulating gas, and the preset buffer gas, and calculating a mixed effective ionization coefficient curve of the initial ternary mixed insulating gas based on each of the effective ionization coefficient curves;

[0015] Calculating the initial critical reduced field strength of the initial ternary mixed insulating gas under the critical gas ratio condition according to the mixed effective ionization coefficient curve;

[0016] The initial critical reduced field strength is compared with the reference critical reduced field strength of SF6 gas. According to the field strength comparison result, the mixing ratio of the initial ternary mixed insulating gas is optimized based on gas replacement and / or gas ratio adjustment to obtain the target ternary mixed insulating gas.

[0017] Optionally, performing mixing ratio optimization based on gas replacement and / or gas ratio adjustment on the initial ternary mixed insulating gas according to the field strength comparison result to obtain a target ternary mixed insulating gas includes:

[0018] If the initial critical reduced field strength is less than the reference critical reduced field strength of SF6 gas, the first insulating gas and / or the second insulating gas is replaced with an environmentally friendly insulating gas that meets preset replacement conditions to obtain a first optimized mixed insulating gas, and the critical reduced field strength is recalculated based on the first optimized mixed insulating gas, and re-compared with the reference critical reduced field strength of SF6 gas;

[0019] If the initial critical reduced field strength is greater than the reference critical reduced field strength of SF6 gas, calculating the mixed GWP value of the initial ternary mixed insulating gas, and based on the mixed GWP value, reducing the gas proportions of the first insulating gas and the second insulating gas in combination with the priority to obtain a second optimized mixed insulating gas, recalculating the critical reduced field strength based on the second optimized mixed insulating gas, and re-comparing it with the reference critical reduced field strength of SF6 gas;

[0020] When the error between the critical reduced field strength recalculated after the mixing ratio optimization and the reference critical reduced field strength of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0021] Optionally, the performing parameter comparison between the initial ternary mixed insulating gas and SF6 gas, and optimizing the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain the target ternary mixed insulating gas includes:

[0022] Performing a power frequency breakdown test on the initial ternary mixed insulating gas to obtain an initial power frequency breakdown voltage under isobaric conditions with SF6 gas;

[0023] The initial power frequency breakdown voltage is compared with a reference power frequency breakdown voltage of SF6 gas. Based on the voltage comparison result, the initial ternary mixed insulating gas is optimized based on gas replacement and / or gas ratio adjustment to obtain a target ternary mixed insulating gas.

[0024] Optionally, performing mixing ratio optimization based on gas replacement and / or gas ratio adjustment on the initial ternary mixed insulating gas according to the voltage comparison result to obtain a target ternary mixed insulating gas includes:

[0025] If the initial power frequency breakdown voltage is less than the reference power frequency breakdown voltage of SF6 gas, the first insulating gas and / or the second insulating gas are replaced with an environmentally friendly insulating gas that meets the preset replacement conditions to obtain a third optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the third optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas;

[0026] If the initial power frequency breakdown voltage is greater than the reference power frequency breakdown voltage of SF6 gas, the mixed GWP value of the initial ternary mixed insulating gas is calculated, and based on the mixed GWP value, the gas proportions of the first insulating gas and the second insulating gas are reduced in combination with the priority to obtain a fourth optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the fourth optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas;

[0027] When the error between the power frequency breakdown voltage recalculated after the mixing ratio optimization and the reference power frequency breakdown voltage of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0028] Optionally, the calculating a mixed GWP value of the initial ternary mixed insulating gas, and reducing the gas proportions of the first insulating gas and the second insulating gas in combination with priority based on the mixed GWP value, includes:

[0029] Obtaining the relative molecular mass, single gas ratio, and single gas GWP value of the first insulating gas, the second insulating gas, and the preset buffer gas respectively;

[0030] Calculating the mixed GWP value of the initial ternary mixed insulating gas according to the relative molecular masses, the single gas ratios, and the single gas GWP values;

[0031] Based on the mixed GWP value, calculating partial derivatives of the single gas ratios of the first insulating gas and the second insulating gas, respectively, to obtain a first partial derivative of the ratio corresponding to the first insulating gas and a second partial derivative of the ratio corresponding to the second insulating gas;

[0032] If the first partial derivative of the proportion is smaller than the second partial derivative of the proportion, while reducing the gas proportions of the first insulating gas and the second insulating gas, the gas proportion of the second insulating gas is preferentially reduced;

[0033] If the first partial derivative of the ratio is greater than the second partial derivative of the ratio, the gas ratio of the first insulating gas is preferentially reduced while reducing the gas ratios of the first insulating gas and the second insulating gas.

[0034] Optionally, each of the environmentally friendly insulating gases has its own corresponding liquefaction temperature and insulation strength, and the preset gas screening condition indicates that the liquefaction temperature of the environmentally friendly insulating gas is within a preset temperature range, and the insulation strength is within a preset insulation strength range; the preset buffer gas is CO2 gas, or N2 gas.

[0035] The present invention also provides a ternary mixed insulating gas optimization configuration device, comprising:

[0036] Insulating gas acquisition module, used to obtain a variety of environmentally friendly insulating gases;

[0037] an insulating gas selection module, configured to preliminarily select a first insulating gas and a second insulating gas that meet preset gas screening conditions from the plurality of environmentally friendly insulating gases;

[0038] an insulating gas mixing module, configured to mix the first insulating gas and the second insulating gas with a preset buffer gas to form an initial ternary mixed insulating gas;

[0039] The mixing ratio optimization module is used to perform parameter comparison between the initial ternary mixed insulating gas and SF6 gas, and optimize the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain the target ternary mixed insulating gas.

[0040] The present invention further provides an electronic device, comprising a processor and a memory:

[0041] The memory is used to store program code and transmit the program code to the processor;

[0042] The processor is configured to execute any one of the above methods for optimizing the configuration of the ternary mixed insulating gas according to instructions in the program code.

[0043] The present invention also provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the ternary mixed insulating gas optimization configuration method as described in any one of the above items.

[0044] It can be seen from the above technical solutions that the present invention has the following advantages:

[0045] A method for optimizing the configuration of a ternary mixed insulating gas is provided. First, a plurality of environmentally friendly insulating gases are obtained, and a first insulating gas and a second insulating gas are preliminarily selected from these gases that meet preset gas screening criteria. Next, a preset buffer gas is mixed with the first and second insulating gases to form an initial ternary mixed insulating gas. Finally, parameters of the initial ternary mixed insulating gas are compared with those of SF6 gas. Based on the parameter comparison results, the mixing ratio of the initial ternary mixed insulating gas is optimized to obtain a target ternary mixed insulating gas. Thus, based on the parameter comparison and optimization of the mixing ratio of the mixed insulating gas, a ternary mixed insulating gas with parameters equivalent to those of SF6 gas under optimal configuration conditions can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A flowchart of the steps of a method for optimizing the configuration of a ternary mixed insulating gas;

[0048] Figure 2 A schematic diagram of the overall process of a ternary mixed insulating gas optimization configuration method;

[0049] Figure 3 The figure shows the calculation results between the liquefaction temperature constraint of the ternary mixed insulating gas and the critical ratio of each insulating gas in the given example;

[0050] Figure 4 This is a comparison chart of the power frequency breakdown voltage of the ternary mixed insulating gas in the given example and the data of SF6 gas under the same conditions;

[0051] Figure 5 This is a structural block diagram of a ternary mixed insulating gas optimization configuration device. DETAILED DESCRIPTION

[0052] The embodiments of the present invention provide a method, device, electronic device and medium for optimizing the configuration of a ternary mixed insulating gas, which are used to solve or partially solve the technical problem that the current research on ternary mixed insulating gas is still in its infancy and the gas mixing method is not systematic and reasonable enough.

[0053] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] As an example, with the rapid development of the power industry, the use of SF6 gas in high-voltage power equipment continues to grow rapidly, despite the lack of viable alternative technologies. The amount of SF6 gas in the atmosphere is also increasing annually. SF6 gas has a strong greenhouse effect, making the search for environmentally friendly insulating gas alternatives to SF6 urgent. Researching environmentally friendly SF6 insulating gas alternatives has become a challenging task for researchers in the power industry.

[0055] The present invention comprehensively analyzes factors such as liquefaction temperature, dielectric strength, and GWP (Global Warming Potential) and believes that the most studied ones, such as C4F7N (perfluoroisobutyronitrile), C5F 10 Single environmentally friendly insulating gases like perfluoro-n-propyl vinyl ether (PFPE) and CF3I (trifluoroiodomethane) cannot directly replace SF6. Furthermore, within the minimum operating temperature of -25°C, binary mixed insulating gases cannot replace SF6 at the same pressure.

[0056] At present, the research on ternary mixed insulating gas at home and abroad is still in its infancy, and no systematic and reasonable configuration scheme for ternary mixed insulating gas has been formed.

[0057] Therefore, one of the core inventive points of the embodiments of the present invention is to address the deficiencies in the prior art and provide a reasonable and complete method for optimizing the configuration of a ternary mixed insulating gas, taking into account factors such as insulation strength, liquefaction temperature, and GWP value. By calculating based on parameters such as the liquefaction temperature, GWP value, and effective ionization coefficient curve of each gas component, the critical ratio and critical reduced field strength under specific liquefaction temperature requirements are obtained, and the parameters are compared with SF6. Alternatively, the power frequency breakdown voltage of the ternary mixed insulating gas is obtained in combination with a power frequency breakdown test and compared with the data of SF6 under the same conditions. At the same time, the influence of each gas on the GWP value of the ternary mixed insulating gas is combined to optimize the ratio or composition of the ternary mixed insulating gas. Ultimately, a ternary mixed insulating gas can be obtained whose liquefaction temperature meets the minimum operating temperature or other specified liquefaction temperature conditions, whose insulation strength meets the insulation strength equivalent to that of isobaric SF6, and whose GWP value is as low as possible. The method provided by the present invention not only takes into account factors such as the dielectric strength, GWP value, and liquefaction temperature of the ternary mixed insulating gas, but also takes into account the composition of the ternary mixed insulating gas, and provides a basis for selecting the composition of the ternary mixed insulating gas and adjustment rules. This can provide a complete and comprehensive method for configuring the ternary mixed insulating gas, providing a theoretical basis for subsequent research and configuration of configuration schemes for the ternary mixed insulating gas.

[0058] Reference Figure 1 , shows a flowchart of a method for optimizing configuration of a ternary mixed insulating gas provided by an embodiment of the present invention, which may specifically include the following steps:

[0059] Step 101, obtaining a plurality of environmentally friendly insulating gases;

[0060] In the specific implementation, it is necessary to first identify a variety of environmentally friendly insulating gases that can be used in the blend. Environmentally friendly insulating gases are gases with low global warming potential (GWP) values ​​and good insulation properties. They are used to replace traditional SF6 gas in power equipment. The environmentally friendly insulating gases used in the blend can be selected as described in the previous background section, or other available environmentally friendly insulating gases can be used.

[0061] Each environmentally friendly insulating gas has its own corresponding liquefaction temperature and dielectric strength. The liquefaction temperature and dielectric strength of various environmentally friendly insulating gases can be obtained by searching relevant literature or manufacturer's factory information.

[0062] Step 102: Preliminarily selecting a first insulating gas and a second insulating gas that meet a preset gas screening condition from the plurality of environmentally friendly insulating gases;

[0063] According to the liquefaction temperature and insulation strength of each environmentally friendly insulating gas, two insulating gases that meet the preset gas screening conditions are preliminarily selected and recorded as gas A (first insulating gas) and gas B (second insulating gas).

[0064] The preset gas screening conditions referred to in this embodiment of the present invention indicate that the liquefaction temperature of the environmentally friendly insulating gas is within a preset temperature range (low liquefaction temperature) and that the insulation strength is within a preset insulation strength range (strong insulation strength). It should be understood that the specific temperature range and insulation strength range can be set based on actual conditions and are not limited in this invention.

[0065] Step 103: Mixing the first insulating gas and the second insulating gas with a preset buffer gas to form an initial ternary mixed insulating gas;

[0066] Based on the selected A gas and B gas, and then mixing a buffer gas (CO2 gas, or N2 gas), an initial ternary mixed insulating gas can be obtained.

[0067] Step 104 : performing parameter comparison between the initial ternary mixed insulating gas and SF 6 gas, and optimizing the mixing ratio of the initial ternary mixed insulating gas based on the parameter comparison result to obtain a target ternary mixed insulating gas.

[0068] Specifically, in the first optional solution, the process of performing parameter comparison between the initial ternary mixed insulating gas and the SF6 gas, and optimizing the mixing ratio of the initial ternary mixed insulating gas based on the parameter comparison result to obtain the target ternary mixed insulating gas can be achieved by executing the following sub-steps S01 to S04:

[0069] Step S01: Calculating the critical gas ratios of the first insulating gas and the second insulating gas in the initial ternary mixed insulating gas according to the liquefaction temperature requirement of the ternary mixed insulating gas;

[0070] First, according to the liquefaction temperature requirements of the ternary mixed insulating gas ( It can also be understood as the lowest operating temperature, the unit is K (Kelvin), which is determined according to the specific operating environment conditions). Calculate the critical gas ratio of gas A and gas B in the ternary mixed insulating gas, which are recorded as and .

[0071] Among them, combining the Clausius-Clapeyron equation and the Trouton rule, and assuming that the mixed insulating gas obeys the ideal gas law, the critical gas ratio of gas A and gas B in the ternary mixed insulating gas can be obtained and The calculation formula is as follows:

[0072]

[0073]

[0074] Where, and Respectively represent the liquefaction temperature of gas A and gas B at atmospheric pressure, in K; represents the ideal gas constant, which is ; represents the Trouton constant, which is ; Indicates the gas vapor pressure, according to the ideal gas law and the gas pressure at the time of the set gas configuration and temperature conditions It is calculated and the unit is MPa (megapascal). The calculation formula is as follows:

[0075]

[0076] Step S02: obtaining effective ionization coefficient curves of the first insulating gas, the second insulating gas, and the preset buffer gas respectively, and calculating a mixed effective ionization coefficient curve of the initial ternary mixed insulating gas based on the effective ionization coefficient curves;

[0077] Among them, the effective ionization coefficient curves of each gas component in the ternary mixed insulating gas can be obtained through the Steady-State Townsend Test (SST). Taking N2 as the buffer gas as an example, assuming that the effective ionization coefficient curve functions of gas A, gas B and N2 can be obtained from the SST test respectively 、 、 The effective ionization coefficient curve function of the ternary mixed insulating gas is It can be calculated by the following formula:

[0078]

[0079] Where, 、 and They respectively represent the gas ratios of gas A, gas B and N2 in the ternary mixed insulating gas.

[0080] Step S03: Calculating the initial critical reduced field strength of the initial ternary mixed insulating gas under the critical gas ratio condition according to the mixed effective ionization coefficient curve;

[0081] According to the effective ionization coefficient curve function of the ternary mixed insulating gas , the critical gas ratio can be calculated and Critical reduced electric field strength of ternary mixed insulating gas under conditions Among them, when When That is .

[0082] Step S04: Compare the initial critical reduced field strength with the reference critical reduced field strength of SF6 gas. According to the field strength comparison result, optimize the mixing ratio of the initial ternary mixed insulating gas based on gas replacement and / or gas ratio adjustment to obtain the target ternary mixed insulating gas.

[0083] The critical reduced field strength of the ternary mixed insulating gas and the critical reduced field strength of SF6 gas Make a comparison.

[0084] If the critical reduced field strength of the ternary mixed insulating gas Less than the critical reduced field strength of SF6 gas , then replace gas A and / or gas B with insulating gas that meets the preset replacement conditions.

[0085] Specifically, the preset replacement conditions can be expressed as a lower liquefaction temperature and comparable insulation strength, or a comparable liquefaction temperature and higher insulation strength, or a lower liquefaction temperature and higher insulation strength. Those skilled in the art can select the gas replacement conditions based on actual conditions. Environmentally friendly insulating gases with lower liquefaction temperatures and higher insulation strength can be prioritized. When performing a gas replacement, you can choose to replace only one environmentally friendly insulating gas, such as only replacing gas A or only replacing gas B, or you can choose to replace both gas A and gas B simultaneously.

[0086] In a specific implementation, if the initial critical reduced field strength is less than the reference critical reduced field strength of SF6 gas, the first insulating gas and / or the second insulating gas is replaced with an environmentally friendly insulating gas that meets the preset replacement conditions to obtain a first optimized mixed insulating gas. Then, the critical reduced field strength is recalculated based on the first optimized mixed insulating gas and re-compared with the reference critical reduced field strength of SF6 gas.

[0087] If the critical reduced field strength of the ternary mixed insulating gas Greater than the critical reduced field strength of SF6 gas , by deriving the GWP value calculation formula of the ternary mixed insulating gas, the gas proportion of the insulating gas (gas A or gas B) that has a better effect on reducing the GWP value of the mixed gas can be appropriately reduced.

[0088] In a specific implementation, if the initial critical reduced field strength is greater than the reference critical reduced field strength of SF6 gas, the mixed GWP value of the initial ternary mixed insulating gas is calculated, and based on the mixed GWP value, the gas proportions of the first insulating gas and the second insulating gas are reduced in priority to obtain a second optimized mixed insulating gas. Then, the critical reduced field strength is recalculated based on the second optimized mixed insulating gas and recompared with the reference critical reduced field strength of SF6 gas.

[0089] More specifically, the process of calculating the mixed GWP value of the initial ternary mixed insulating gas and reducing the gas proportions of the first insulating gas and the second insulating gas based on the mixed GWP value and in combination with priority may mainly include the following sub-steps S21 to S23:

[0090] Step S21: respectively obtaining the relative molecular mass, single gas ratio, and single gas GWP value of the first insulating gas, the second insulating gas, and the preset buffer gas;

[0091] Step S22: Calculating the mixed GWP value of the initial ternary mixed insulating gas based on the relative molecular mass, the ratio of each single gas, and the GWP value of each single gas;

[0092] The mixed GWP value of the ternary mixed insulating gas is calculated by the GWP value and ratio of each gas component. The calculation formula is as follows:

[0093]

[0094] Where, Indicates the mixed GWP value of the ternary mixed insulating gas; 、 and Respectively represent the mass fractions of gas A, gas B and N2 in the ternary mixed insulating gas; 、 and They represent the GWP values ​​of gas A, gas B and N2 in the ternary mixed insulating gas respectively.

[0095] The mass fraction of each gas component is calculated from the relative molecular mass of each gas molecule and the gas ratio. Therefore, the mixed GWP value of the ternary mixed insulating gas can be calculated using the following formula:

[0096]

[0097] Where, 、 and Respectively represent the relative molecular masses of gas A, gas B and N2 in the ternary mixed insulating gas; 、 and They represent the gas ratios (volume fractions) of gas A, gas B and N2 in the ternary mixed insulating gas.

[0098] Step S23: Based on the mixed GWP value, partial derivatives of the single gas ratios of the first insulating gas and the second insulating gas are calculated to obtain a first partial derivative of the ratio corresponding to the first insulating gas and a second partial derivative of the ratio corresponding to the second insulating gas;

[0099] The effect on the mixed GWP value is better. The mixed GWP value calculation formula of the ternary mixed insulating gas is used to calculate the partial derivative of the proportion of each gas component, and then the size of the partial derivative is compared.

[0100] This process mainly compares the effects of gas A and gas B. The calculation formula is as follows:

[0101]

[0102]

[0103] If the first partial derivative Less than the second partial derivative , if the percentage reductions are the same, a reduction in the percentage of Gas B will have a greater impact on the GWP of the ternary insulating gas mixture, resulting in a greater reduction in the GWP. Therefore, while reducing the percentages of both Gas A and Gas B, the percentage of Gas B should be prioritized. Alternatively, based on priority, the gas ratio can be adjusted by maintaining the percentage of Gas A unchanged and only reducing the percentage of Gas B.

[0104] Similarly, if the first partial derivative Greater than the second partial derivative , if the percentage reductions are the same, a reduction in the percentage of Gas A will have a greater impact on the GWP of the ternary insulating gas mixture, resulting in a greater reduction in the GWP. Therefore, while reducing the percentages of both Gas A and Gas B, the percentage of Gas A should be prioritized. Alternatively, based on priority, the gas ratio can be adjusted by maintaining the percentage of Gas B unchanged and only reducing the percentage of Gas A.

[0105] Repeat the previous related calculation and parameter comparison steps until the insulation strength of the optimized ternary mixed insulating gas is equivalent to that of SF6 gas (that is, the critical reduced field strength of the ternary mixed insulating gas is obtained after the last optimization). Equal to or slightly greater than the critical reduced field strength of SF6 gas ). The ternary mixed insulating gas obtained at this time is the liquefaction temperature requirement Under the conditions of , the optimal configuration scheme of ternary mixed insulating gas with insulation strength equivalent to SF6 gas and relatively lowest GWP value is proposed.

[0106] In a specific implementation, when the error between the critical reduced field strength recalculated after the mixing ratio optimization and the reference critical reduced field strength of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0107] In the second optional solution, a process of performing parameter comparison between the initial ternary mixed insulating gas and SF6 gas, and optimizing the mixing ratio of the initial ternary mixed insulating gas based on the parameter comparison result to obtain the target ternary mixed insulating gas can be achieved by executing the following sub-steps S11 to S12:

[0108] Step S11: performing a power frequency breakdown test on the initial ternary mixed insulating gas to obtain an initial power frequency breakdown voltage under isobaric conditions with the SF6 gas;

[0109] Through the power frequency breakdown test of the ternary mixed insulating gas, the power frequency breakdown voltage of SF6 gas under equal pressure conditions can be obtained. .

[0110] Step S12: Compare the initial power frequency breakdown voltage with the reference power frequency breakdown voltage of SF6 gas, and optimize the mixing ratio of the initial ternary mixed insulating gas based on gas replacement and / or gas ratio adjustment according to the voltage comparison result to obtain the target ternary mixed insulating gas.

[0111] The power frequency breakdown voltage of the ternary mixed insulating gas Reference power frequency breakdown voltage of SF6 gas Make a comparison.

[0112] If the power frequency breakdown voltage of the ternary mixed insulating gas Less than the reference power frequency breakdown voltage , then replace gas A and / or gas B with insulating gas that meets the preset replacement conditions.

[0113] Specifically, the preset replacement conditions can be expressed as a lower liquefaction temperature and comparable insulation strength, or a comparable liquefaction temperature and higher insulation strength, or a lower liquefaction temperature and higher insulation strength. Those skilled in the art can select the gas replacement conditions based on actual conditions. Environmentally friendly insulating gases with lower liquefaction temperatures and higher insulation strength can be prioritized. When performing a gas replacement, you can choose to replace only one environmentally friendly insulating gas, such as only replacing gas A or only replacing gas B, or you can choose to replace both gas A and gas B simultaneously.

[0114] In a specific implementation, if the initial power frequency breakdown voltage is less than the reference power frequency breakdown voltage of SF6 gas, the first insulating gas and / or the second insulating gas is replaced with an environmentally friendly insulating gas that meets the preset replacement conditions to obtain a third optimized mixed insulating gas. Then, the power frequency breakdown voltage is recalculated based on the third optimized mixed insulating gas and re-compared with the reference power frequency breakdown voltage of SF6 gas.

[0115] If the power frequency breakdown voltage of the ternary mixed insulating gas Less than the reference power frequency breakdown voltage , by deriving the GWP value calculation formula of the ternary mixed insulating gas, the gas proportion of the insulating gas (gas A or gas B) that has a better effect on reducing the GWP value of the mixed gas can be appropriately reduced.

[0116] In a specific implementation, if the initial power frequency breakdown voltage is greater than the reference power frequency breakdown voltage of SF6 gas, the mixed GWP value of the initial ternary mixed insulating gas is calculated. Based on the mixed GWP value, the gas proportions of the first insulating gas and the second insulating gas are reduced in accordance with their priority to obtain a fourth optimized mixed insulating gas. The power frequency breakdown voltage is recalculated based on the fourth optimized mixed insulating gas and re-compared with the reference power frequency breakdown voltage of SF6 gas. The process of calculating the mixed GWP value of the initial ternary mixed insulating gas and reducing the gas proportions of the first insulating gas and the second insulating gas in accordance with their priority based on the mixed GWP value can be performed with reference to substeps S21 to S23 and is not further described here.

[0117] Repeat the previous related calculation and parameter comparison steps until the power frequency breakdown voltage of the optimized ternary mixed insulating gas is Reference power frequency breakdown voltage of SF6 gas Equivalent (i.e., the power frequency breakdown voltage of the ternary mixed insulating gas obtained after the last optimization) Equal to or slightly greater than the reference power frequency breakdown voltage of SF6 gas ), which means that the insulation strength of the optimized ternary mixed insulating gas is equivalent to that of SF6 gas. The ternary mixed insulating gas obtained at this time is the liquefaction temperature requirement Under the conditions of , the optimal configuration scheme of ternary mixed insulating gas with insulation strength equivalent to SF6 gas and relatively lowest GWP value is proposed.

[0118] In a specific implementation, when the error between the power frequency breakdown voltage recalculated after the mixing ratio optimization and the reference power frequency breakdown voltage of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0119] It should be pointed out that in actual applications, when optimizing the mixing ratio of mixed insulating gases, those skilled in the art can arbitrarily choose either the critical reduced field strength or the power frequency breakdown voltage optimization scheme according to actual needs, thereby increasing the flexibility of selecting the optimization configuration scheme for the mixed insulating gas. For example, under conditions where gas is scarce, such as a small amount of synthesis, in order to achieve the purpose of obtaining an optimized configuration result with a small amount of gas, the critical reduced field strength optimization scheme can be selected. However, this method has higher requirements for the experimental platform. When the amount of gas is sufficient, the power frequency breakdown voltage optimization scheme is preferred. The power frequency breakdown voltage optimization scheme has relatively low requirements for the experimental platform, but it consumes more gas. The gas consumption of the power frequency breakdown voltage optimization scheme is generally more than 1000 times that of the critical reduced field strength optimization scheme. It is understandable that the present invention is not limited to this.

[0120] In an embodiment of the present invention, a reasonable and complete method for optimizing the configuration of a ternary mixed insulating gas is provided, taking into account factors such as insulation strength, liquefaction temperature, and GWP. By calculating parameters such as the liquefaction temperature, GWP, and effective ionization coefficient curve of each gas component, the critical ratio and critical reduced field strength under specific liquefaction temperature requirements are obtained, and the parameters are compared with those of SF6. Alternatively, the power frequency breakdown voltage of the ternary mixed insulating gas is obtained through power frequency breakdown testing and compared with data from SF6 under the same conditions. Furthermore, the influence of each gas on the GWP of the ternary mixed insulating gas is taken into account to optimize the ratio or composition of the ternary mixed insulating gas. Ultimately, a ternary mixed insulating gas can be obtained whose liquefaction temperature meets the minimum operating temperature or other specified liquefaction temperature conditions, whose insulation strength meets the insulation strength of isobaric SF6, and whose GWP value is as low as possible. The method provided in the embodiment of the present invention not only takes into account factors such as the dielectric strength, GWP value, and liquefaction temperature of the ternary mixed insulating gas, but also takes into account the composition of the ternary mixed insulating gas, and provides a basis for selecting the composition of the ternary mixed insulating gas and adjustment rules. This can provide a complete and comprehensive method for configuring the ternary mixed insulating gas, providing a theoretical basis for subsequent research and configuration of ternary mixed insulating gas configuration schemes.

[0121] For better explanation, refer to Figure 2, showing a schematic diagram of the overall process of a method for optimizing the configuration of a ternary mixed insulating gas according to an embodiment of the present invention. It should be noted that this embodiment only briefly describes the general process of optimizing the configuration of a ternary mixed insulating gas. The specific implementation of each step can be understood by referring to the relevant content in the preceding embodiments and will not be elaborated here. Figure 2 The various parameters and specific calculation formulas involved can also refer to the relevant content in the previous embodiment. It can be understood that the present invention is not limited to this.

[0122] First, two insulating gases with low liquefaction temperature and strong insulation strength are preliminarily selected from a variety of environmentally friendly insulating gases, and are recorded as gas A and gas B;

[0123] Gas A and gas B are mixed with buffer gas N2 or CO2 to obtain a preliminary gas composition, i.e., a ternary mixed gas A / B / N2 or A / B / CO2;

[0124] Under the liquefaction temperature requirements of the ternary gas mixture, combined with the gas pressure and temperature conditions when setting the gas mixture, calculate the ternary gas mixture ratio under the liquefaction temperature limit (i.e., the critical ratio of gas A and the critical ratio of gas B);

[0125] Calculate the effective ionization coefficient curve function of the ternary gas mixture based on the effective ionization coefficient curve of each gas in the ternary gas mixture, and further calculate the critical reduced field strength; or directly perform a power frequency breakdown test on the ternary gas mixture under critical ratio conditions to obtain the power frequency breakdown voltage;

[0126] Determining whether the calculated critical reduced field strength is greater than the critical reduced field strength of SF6, or determining whether the calculated power frequency breakdown voltage is greater than the power frequency breakdown voltage of SF6;

[0127] If not, first consider replacing gas A or gas B (or replacing both gas A and gas B simultaneously) with an insulating gas with a lower liquefaction temperature and stronger insulation strength, and secondly consider replacing gas A or gas B (or replacing both gas A and gas B simultaneously) with an insulating gas with a lower liquefaction temperature and equivalent insulation strength, or with an insulating gas with equivalent liquefaction temperature and stronger insulation strength. Based on the optimized ternary gas mixture, recalculate the critical reduced electric field strength, or recalculate the power frequency breakdown voltage, and compare the parameters with SF6.

[0128] If so, calculate the mixed GWP value of the ternary gas mixture, compare the effects of gas A and gas B on the mixed GWP value, and appropriately reduce the proportion of gas A or the proportion of gas B based on the comparison results of the effects; recalculate the critical reduced electric field strength or recalculate the power frequency breakdown voltage based on the optimized ternary gas mixture, and compare the parameters with SF6;

[0129] When the calculated critical reduced field strength is equal to or slightly greater than the critical reduced field strength of SF6, or the calculated power frequency breakdown voltage is equal to or slightly greater than the power frequency breakdown voltage of SF6, the optimal configuration scheme of A / B / N2 or A / B / CO2 is output.

[0130] To facilitate understanding, the embodiment of the present invention is described below using a specific example.

[0131] Take A / B / CO2 ternary mixed insulating gas as an example. Figure 3 This is a diagram showing the calculation results between the liquefaction temperature constraint of the A / B / CO2 ternary mixed insulating gas and the critical ratio of each insulating gas. Figure 4 This is a data comparison chart of the power frequency breakdown voltage of A / B / CO2 ternary mixed insulating gas and SF6 gas under the same conditions.

[0132] Combine Figure 3 、 Figure 4 At atmospheric pressure, the liquefaction temperature of gas A is -22°C, and the liquefaction temperature of gas B is -4.7°C. Calculations show that, under the minimum operating temperature constraint of -25°C (i.e., the liquefaction temperature of the ternary mixed insulating gas is -25°C), when the configured ternary mixed insulating gas is at a temperature of -25°C and a pressure of 0.5 MPa, the proportion of gas A in the ternary mixed insulating gas should not exceed 20.88%, and the proportion of gas B should not exceed 10.24%.

[0133] This example also conducted power frequency breakdown tests on a ternary insulating gas mixture at critical ratios. The results showed that the dielectric strength of 20% A / 10% B / 70% CO2 was 1.12 times that of SF6 under the same conditions. Subsequently, the gas ratios were adjusted, assuming that the proportion of gas A remained unchanged and only the proportion of gas B was reduced. The power frequency breakdown test was repeated, and the dielectric strength of 20% A / 8% B / 72% CO2 was 1.07 times that of SF6 under the same conditions. Furthermore, the dielectric strength of 20% A / 6% B / 74% CO2 was 0.97 times that of SF6 under the same conditions. Calculations show that the GWP of 20% A / 8% B / 72% CO2 is 1890.92, which is lower than the GWP of each insulating gas component alone and approximately 7.91% of that of SF6. From this, it can be concluded that the optimal ratio of the A / B / CO2 ternary mixed insulating gas that can achieve the insulation strength of SF6 at a liquefaction temperature of -25°C is 20%A / 8%B / 72%CO2.

[0134] Reference Figure 5 , shows a structural block diagram of a ternary mixed insulating gas optimization configuration device provided by an embodiment of the present invention, which may specifically include:

[0135] Insulating gas acquisition module 501, used to obtain a variety of environmentally friendly insulating gases;

[0136] An insulating gas selection module 502 is configured to preliminarily select a first insulating gas and a second insulating gas that meet a preset gas screening condition from the plurality of environmentally friendly insulating gases;

[0137] An insulating gas mixing module 503 is configured to mix the first insulating gas and the second insulating gas with a preset buffer gas to form an initial ternary mixed insulating gas;

[0138] The mixing ratio optimization module 504 is used to perform parameter comparison between the initial ternary mixed insulating gas and SF6 gas, and optimize the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain the target ternary mixed insulating gas.

[0139] In an optional embodiment, the mixing ratio optimization module 504 includes:

[0140] a gas critical ratio calculation module, configured to calculate the gas critical ratios of the first insulating gas and the second insulating gas in the initial ternary mixed insulating gas, respectively, based on the liquefaction temperature requirement of the ternary mixed insulating gas;

[0141] a mixed effective ionization coefficient curve calculation module, configured to respectively obtain effective ionization coefficient curves of the first insulating gas, the second insulating gas, and the preset buffer gas, and calculate a mixed effective ionization coefficient curve of the initial ternary mixed insulating gas based on each of the effective ionization coefficient curves;

[0142] An initial critical reduced field strength calculation module, configured to calculate the initial critical reduced field strength of the initial ternary mixed insulating gas under the critical gas ratio condition according to the mixed effective ionization coefficient curve;

[0143] The first module of mixing ratio optimization is used to compare the initial critical reduced field strength with the reference critical reduced field strength of SF6 gas, and according to the field strength comparison result, optimize the mixing ratio of the initial ternary mixed insulating gas based on gas replacement and / or gas ratio adjustment to obtain the target ternary mixed insulating gas.

[0144] In an optional embodiment, the first module for optimizing the mixing ratio is specifically configured to:

[0145] If the initial critical reduced field strength is less than the reference critical reduced field strength of SF6 gas, the first insulating gas and / or the second insulating gas is replaced with an environmentally friendly insulating gas that meets preset replacement conditions to obtain a first optimized mixed insulating gas, and the critical reduced field strength is recalculated based on the first optimized mixed insulating gas, and re-compared with the reference critical reduced field strength of SF6 gas;

[0146] If the initial critical reduced field strength is greater than the reference critical reduced field strength of SF6 gas, calculating the mixed GWP value of the initial ternary mixed insulating gas, and based on the mixed GWP value, reducing the gas proportions of the first insulating gas and the second insulating gas in combination with the priority to obtain a second optimized mixed insulating gas, recalculating the critical reduced field strength based on the second optimized mixed insulating gas, and re-comparing it with the reference critical reduced field strength of SF6 gas;

[0147] When the error between the critical reduced field strength recalculated after the mixing ratio optimization and the reference critical reduced field strength of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0148] In an optional embodiment, the mixing ratio optimization module 504 includes:

[0149] A power frequency breakdown test module, configured to perform a power frequency breakdown test on the initial ternary mixed insulating gas to obtain an initial power frequency breakdown voltage under isobaric conditions with the SF6 gas;

[0150] The second module of mixing ratio optimization is used to compare the initial power frequency breakdown voltage with the reference power frequency breakdown voltage of SF6 gas, and according to the voltage comparison result, optimize the mixing ratio of the initial ternary mixed insulating gas based on gas replacement and / or gas ratio adjustment to obtain the target ternary mixed insulating gas.

[0151] In an optional embodiment, the second module for optimizing the mixing ratio is specifically configured to:

[0152] If the initial power frequency breakdown voltage is less than the reference power frequency breakdown voltage of SF6 gas, the first insulating gas and / or the second insulating gas are replaced with an environmentally friendly insulating gas that meets the preset replacement conditions to obtain a third optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the third optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas;

[0153] If the initial power frequency breakdown voltage is greater than the reference power frequency breakdown voltage of SF6 gas, the mixed GWP value of the initial ternary mixed insulating gas is calculated, and based on the mixed GWP value, the gas proportions of the first insulating gas and the second insulating gas are reduced in combination with the priority to obtain a fourth optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the fourth optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas;

[0154] When the error between the power frequency breakdown voltage recalculated after the mixing ratio optimization and the reference power frequency breakdown voltage of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

[0155] In an optional embodiment, the first mixing ratio optimization module and the second mixing ratio optimization module both include:

[0156] A gas parameter acquisition module, configured to respectively acquire the relative molecular mass, single gas ratio, and single gas GWP value of the first insulating gas, the second insulating gas, and the preset buffer gas;

[0157] a mixed GWP value calculation module, configured to calculate the mixed GWP value of the initial ternary mixed insulating gas according to each of the relative molecular masses, each of the single gas ratios, and each of the single gas GWP values;

[0158] a partial derivative solving module, configured to calculate partial derivatives of the single gas ratios of the first insulating gas and the second insulating gas based on the mixed GWP value, to obtain a first partial derivative value of the first insulating gas and a second partial derivative value of the second insulating gas;

[0159] a first gas proportion priority reduction processing module configured to, when the first proportion partial derivative is less than the second proportion partial derivative, preferentially reduce the gas proportion of the second insulating gas while reducing the gas proportions of the first insulating gas and the second insulating gas;

[0160] The second processing module for preferentially reducing the gas proportion is used to preferentially reduce the gas proportion of the first insulating gas while reducing the gas proportions of the first insulating gas and the second insulating gas when the first proportion partial derivative value is greater than the second proportion partial derivative value.

[0161] In an optional embodiment, each of the environmentally friendly insulating gases has its own corresponding liquefaction temperature and insulation strength, and the preset gas screening condition indicates that the liquefaction temperature of the environmentally friendly insulating gas is within a preset temperature range, and the insulation strength is within a preset insulation strength range; the preset buffer gas is CO2 gas, or N2 gas.

[0162] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the aforementioned method embodiment.

[0163] It should be noted that, in order to enable those skilled in the art to better distinguish data of the same type but with different actual meanings, some technical features are distinguished and described using terms such as first and second in the embodiments of the present invention. Terms such as first and second are only used to distinguish data and have no other special meanings. It can be understood that the present invention does not impose any restrictions on this.

[0164] An embodiment of the present invention further provides an electronic device, the device including a processor and a memory:

[0165] The memory is used to store program codes and transmit the program codes to the processor;

[0166] The processor is configured to execute the ternary mixed insulating gas optimization configuration method of any embodiment of the present invention according to instructions in the program code.

[0167] An embodiment of the present invention further provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the ternary mixed insulating gas optimization configuration method of any embodiment of the present invention.

[0168] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0169] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0170] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0171] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0172] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0173] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing the configuration of a ternary mixed insulating gas, characterized in that: include: Access to a variety of environmentally friendly insulating gases; Preliminarily selecting two first insulating gases and second insulating gases that meet preset gas screening conditions from the multiple environmentally friendly insulating gases; the first insulating gas and the second insulating gas are both insulating gases with low liquefaction temperatures and strong insulation properties, and are respectively recorded as gas A and gas B; Based on the first insulating gas and the second insulating gas, a preset buffer gas is mixed at the same time to form an initial ternary mixed insulating gas; the preset buffer gas is N2 gas or CO2 gas, and the initial ternary mixed insulating gas is recorded as A / B / N2 or A / B / CO2; Parameter comparison is performed on the initial ternary mixed insulating gas and SF6 gas, and according to the parameter comparison result, the mixing ratio of the initial ternary mixed insulating gas is optimized to obtain the target ternary mixed insulating gas, specifically including: Under the liquefaction temperature requirements of the ternary mixed insulating gas, combined with the gas pressure and temperature conditions when setting the gas configuration, calculate the ternary mixed insulating gas ratio under the liquefaction temperature limit; Calculating the effective ionization coefficient curve function of the ternary mixed insulating gas based on the effective ionization coefficient curve of each gas in the ternary mixed insulating gas, and calculating the critical reduced electric field strength under the ternary mixed insulating gas ratio conditions based on the effective ionization coefficient curve function; or directly conducting a power frequency breakdown test on the ternary mixed insulating gas under the critical ratio conditions to obtain the power frequency breakdown voltage; Determining whether the calculated critical reduced field strength is greater than the critical reduced field strength of SF6, or determining whether the calculated power frequency breakdown voltage is greater than the power frequency breakdown voltage of SF6; If not, first consider replacing gas A and / or gas B with an insulating gas with a lower liquefaction temperature and stronger insulation strength, and secondly consider replacing gas A and / or gas B with an insulating gas with a lower liquefaction temperature and equivalent insulation strength, or with an insulating gas with equivalent liquefaction temperature and stronger insulation strength; based on the optimized ternary mixed insulating gas, recalculate the critical reduced field strength or recalculate the power frequency breakdown voltage and compare the parameters with SF6; If so, calculate the mixed GWP value of the ternary mixed insulating gas, compare the effects of gas A and gas B on the mixed GWP value, and appropriately reduce the proportion of gas A or the proportion of gas B based on the comparison results of the effects; recalculate the critical reduced electric field strength or recalculate the power frequency breakdown voltage based on the optimized ternary mixed insulating gas, and compare the parameters with SF6; When the calculated critical reduced field strength is equal to or slightly greater than the critical reduced field strength of SF6, or the calculated power frequency breakdown voltage is equal to or slightly greater than the power frequency breakdown voltage of SF6, the optimal configuration scheme of A / B / N2 or A / B / CO2 is output.

2. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 1, characterized in that: The step of comparing parameters of the initial ternary mixed insulating gas with SF6 gas and optimizing the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain a target ternary mixed insulating gas includes: Calculating the critical gas ratios of the first insulating gas and the second insulating gas in the initial ternary insulating gas mixture according to the liquefaction temperature requirement of the ternary insulating gas mixture; respectively obtaining effective ionization coefficient curves of the first insulating gas, the second insulating gas, and the preset buffer gas, and calculating a mixed effective ionization coefficient curve of the initial ternary mixed insulating gas based on each of the effective ionization coefficient curves; Calculating the initial critical reduced field strength of the initial ternary mixed insulating gas under the critical gas ratio condition according to the mixed effective ionization coefficient curve; The initial critical reduced field strength is compared with the reference critical reduced field strength of SF6 gas. According to the field strength comparison result, the mixing ratio of the initial ternary mixed insulating gas is optimized based on gas replacement and / or gas ratio adjustment to obtain the target ternary mixed insulating gas.

3. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 2, characterized in that: The step of optimizing the mixing ratio of the initial ternary mixed insulating gas by gas replacement and / or gas ratio adjustment based on the field strength comparison result to obtain a target ternary mixed insulating gas includes: If the initial critical reduced field strength is less than the reference critical reduced field strength of SF6 gas, the first insulating gas and / or the second insulating gas is replaced with an environmentally friendly insulating gas that meets preset replacement conditions to obtain a first optimized mixed insulating gas, and the critical reduced field strength is recalculated based on the first optimized mixed insulating gas, and re-compared with the reference critical reduced field strength of SF6 gas; If the initial critical reduced field strength is greater than the reference critical reduced field strength of SF6 gas, calculating the mixed GWP value of the initial ternary mixed insulating gas, and based on the mixed GWP value, reducing the gas proportions of the first insulating gas and the second insulating gas in combination with the priority to obtain a second optimized mixed insulating gas, recalculating the critical reduced field strength based on the second optimized mixed insulating gas, and re-comparing it with the reference critical reduced field strength of SF6 gas; When the error between the critical reduced field strength recalculated after the mixing ratio optimization and the reference critical reduced field strength of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

4. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 1, characterized in that: The step of comparing parameters of the initial ternary mixed insulating gas with SF6 gas and optimizing the mixing ratio of the initial ternary mixed insulating gas according to the parameter comparison result to obtain a target ternary mixed insulating gas includes: Performing a power frequency breakdown test on the initial ternary mixed insulating gas to obtain an initial power frequency breakdown voltage under isobaric conditions with SF6 gas; The initial power frequency breakdown voltage is compared with a reference power frequency breakdown voltage of SF6 gas. Based on the voltage comparison result, the initial ternary mixed insulating gas is optimized based on gas replacement and / or gas ratio adjustment to obtain a target ternary mixed insulating gas.

5. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 4, characterized in that: The step of optimizing the mixing ratio of the initial ternary mixed insulating gas by gas replacement and / or gas ratio adjustment based on the voltage comparison result to obtain a target ternary mixed insulating gas includes: If the initial power frequency breakdown voltage is less than the reference power frequency breakdown voltage of SF6 gas, the first insulating gas and / or the second insulating gas are replaced with an environmentally friendly insulating gas that meets the preset replacement conditions to obtain a third optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the third optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas; If the initial power frequency breakdown voltage is greater than the reference power frequency breakdown voltage of SF6 gas, the mixed GWP value of the initial ternary mixed insulating gas is calculated, and based on the mixed GWP value, the gas proportions of the first insulating gas and the second insulating gas are reduced in combination with the priority to obtain a fourth optimized mixed insulating gas, and the power frequency breakdown voltage is recalculated based on the fourth optimized mixed insulating gas, and re-compared with the reference power frequency breakdown voltage of SF6 gas; When the error between the power frequency breakdown voltage recalculated after the mixing ratio optimization and the reference power frequency breakdown voltage of SF6 gas is within the allowable error range, the ternary mixed insulating gas obtained after the last mixing ratio optimization is used as the target ternary mixed insulating gas.

6. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 3 or 5, characterized in that: The calculating the mixed GWP value of the initial ternary mixed insulating gas and reducing the gas proportions of the first insulating gas and the second insulating gas in combination with priority based on the mixed GWP value includes: Obtaining the relative molecular mass, single gas ratio, and single gas GWP value of the first insulating gas, the second insulating gas, and the preset buffer gas respectively; Calculating the mixed GWP value of the initial ternary mixed insulating gas according to the relative molecular masses, the single gas ratios, and the single gas GWP values; Based on the mixed GWP value, calculating partial derivatives of the single gas ratios of the first insulating gas and the second insulating gas, respectively, to obtain a first partial derivative of the ratio corresponding to the first insulating gas and a second partial derivative of the ratio corresponding to the second insulating gas; If the first partial derivative of the proportion is smaller than the second partial derivative of the proportion, while reducing the gas proportions of the first insulating gas and the second insulating gas, the gas proportion of the second insulating gas is preferentially reduced; If the first partial derivative of the ratio is greater than the second partial derivative of the ratio, the gas ratio of the first insulating gas is preferentially reduced while reducing the gas ratios of the first insulating gas and the second insulating gas.

7. The method for optimizing the configuration of a ternary mixed insulating gas according to claim 1, characterized in that: Each of the environmentally friendly insulating gases has its own corresponding liquefaction temperature and insulation strength. The preset gas screening condition indicates that the liquefaction temperature of the environmentally friendly insulating gas is within a preset temperature range, and the insulation strength is within a preset insulation strength range.

8. A ternary mixed insulating gas optimization configuration device, characterized in that: include: Insulating gas acquisition module, used to obtain a variety of environmentally friendly insulating gases; an insulating gas selection module, configured to preliminarily select a first insulating gas and a second insulating gas that meet preset gas screening conditions from the plurality of environmentally friendly insulating gases; the first insulating gas and the second insulating gas are both insulating gases with a low liquefaction temperature and high insulation properties, and are respectively denoted as gas A and gas B; an insulating gas mixing module, configured to mix the first insulating gas and the second insulating gas with a preset buffer gas to form an initial ternary mixed insulating gas; the preset buffer gas is N2 gas or CO2 gas, and the initial ternary mixed insulating gas is recorded as A / B / N2 or A / B / CO2; A mixing ratio optimization module is used to compare parameters of the initial ternary mixed insulating gas with SF6 gas, and optimize the mixing ratio of the initial ternary mixed insulating gas based on the parameter comparison result to obtain a target ternary mixed insulating gas, specifically including: Under the liquefaction temperature requirements of the ternary mixed insulating gas, combined with the gas pressure and temperature conditions when setting the gas configuration, calculate the ternary mixed insulating gas ratio under the liquefaction temperature limit; Calculating the effective ionization coefficient curve function of the ternary mixed insulating gas based on the effective ionization coefficient curve of each gas in the ternary mixed insulating gas, and calculating the critical reduced electric field strength under the ternary mixed insulating gas ratio conditions based on the effective ionization coefficient curve function; or directly conducting a power frequency breakdown test on the ternary mixed insulating gas under the critical ratio conditions to obtain the power frequency breakdown voltage; Determining whether the calculated critical reduced field strength is greater than the critical reduced field strength of SF6, or determining whether the calculated power frequency breakdown voltage is greater than the power frequency breakdown voltage of SF6; If not, first consider replacing gas A and / or gas B with an insulating gas with a lower liquefaction temperature and stronger insulation strength, and secondly consider replacing gas A and / or gas B with an insulating gas with a lower liquefaction temperature and equivalent insulation strength, or with an insulating gas with equivalent liquefaction temperature and stronger insulation strength; based on the optimized ternary mixed insulating gas, recalculate the critical reduced field strength or recalculate the power frequency breakdown voltage and compare the parameters with SF6; If so, calculate the mixed GWP value of the ternary mixed insulating gas, compare the effects of gas A and gas B on the mixed GWP value, and appropriately reduce the proportion of gas A or the proportion of gas B based on the comparison results of the effects; recalculate the critical reduced electric field strength or recalculate the power frequency breakdown voltage based on the optimized ternary mixed insulating gas, and compare the parameters with SF6; When the calculated critical reduced field strength is equal to or slightly greater than the critical reduced field strength of SF6, or the calculated power frequency breakdown voltage is equal to or slightly greater than the power frequency breakdown voltage of SF6, the optimal configuration scheme of A / B / N2 or A / B / CO2 is output.

9. An electronic device, characterized in that: The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the ternary mixed insulating gas optimization configuration method according to any one of claims 1 to 7 according to instructions in the program code.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program code, and the program code is used to execute the ternary mixed insulating gas optimization configuration method according to any one of claims 1 to 7.

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