CN110796386A - Screening method of green insulating gas - Google Patents
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- 239000002131 composite material Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 4
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- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 231100000820 toxicity test Toxicity 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The embodiment discloses a screening method of green insulating gas, which comprises the following steps: obtaining candidate gas meeting the preliminary screening condition from a database; screening target green insulating gas meeting the insulating screening conditions from the candidate gas; detecting performance parameters of the target green insulating gas; then obtaining target performance parameters of the target green insulating gas according to the performance parameters and the cost of the target green insulating gas; acquiring a comprehensive score of the target green insulating gas according to the target performance parameters; and finally, screening out the final green insulating gas according to the comprehensive score of the target green insulating gas. By adopting the screening method, the complete steps from the database screening to the comprehensive evaluation of the gas are completely built, the comprehensive evaluation of the toxicity, the safety and the application performance of the green insulating gas is performed, the research on the green insulating gas is guided, the screening efficiency is improved, and the resources are saved.
Description
Technical Field
The application relates to the technical field of electrical insulation media, in particular to a screening method of green insulation gas.
Background
Due to SF6Since the gas has excellent insulating and arc-extinguishing properties, SF is generally used in the existing gas-insulated equipment6The gas acts as a gas insulating medium. However, SF6The gas is a gas with strong greenhouse effect, and the potential value GWP of the greenhouse effect is CO223900 times of gas and SF6The service life in the gas atmosphere is up to 3200 years. The gas insulation equipment inevitably generates SF in the production, maintenance and scrapping processes6Gas leakage, once leaked, basically not naturally decomposed, SF6Gas leakage has a cumulative effect on the global warming effect. Thus, the search for environmentally friendly SF6The replacement of gas has become an important research direction in the technical field of electrical insulation and a hot problem to be solved urgently.
Some SF is available6Alternative gases to gases have been developed and are collectively referred to as green insulating gases. The research of green insulating gas is generally to screen the existing gas for SF6Gases of similar properties as gases, instead of SF6A gas. In the prior art, screening of green insulating gas is mainly carried out by researching macros and macros of different gases through theoretical calculation,Microscopic parameters and their feasibility as insulating or arc-extinguishing media were investigated by comparison with the insulating properties of SF6 gas. However, the existing green insulating gas screening method has no definite directionality and low screening efficiency, and simultaneously causes huge waste of personnel and resources.
Disclosure of Invention
The application provides a screening method of green insulating gas, which aims to solve the problems that the existing screening method of green insulating gas has no definite directionality, is low in screening efficiency and can cause huge waste of personnel and resources.
The embodiment of the application provides a screening method of green insulating gas, which comprises the following steps:
obtaining candidate gas meeting the preliminary screening condition from a database;
screening target green insulating gas meeting insulating screening conditions from the candidate gas;
detecting a performance parameter of the target green insulating gas;
obtaining target performance parameters of the target green insulating gas according to the performance parameters and the cost of the target green insulating gas;
acquiring a comprehensive score of the target green insulating gas according to the target performance parameters;
and screening out the final green insulating gas according to the comprehensive score of the target green insulating gas.
Optionally, the preliminary screening conditions include: number of atoms, GWP100Acute toxicity, critical temperature, flammability and chemical stability.
Optionally, the insulation screening condition is according to SF6The relative dielectric strength determined by the gas.
Optionally, detecting a performance parameter of the target green insulating gas comprises:
when the target green insulating gas is the existing gas, performing physical property detection and toxicity detection on the existing gas to obtain performance parameters of the target insulating gas;
when the target green insulating gas is not the existing gas, a synthesis route of the target insulating gas is designed, a test sample is obtained according to the synthesis route, and physical property detection and toxicity detection are carried out on the test sample to obtain performance parameters of the target insulating gas.
Optionally, the physical property detection comprises: boiling point, chemical stability, flammability, ignition point, freezing point, saturated vapor pressure, gas-liquid density, solubility in water, critical temperature, critical pressure, critical density, enthalpy of vaporization (101.3kpa), gas and liquid constant pressure specific heat, gas and liquid constant volume specific heat, surface tension, gas and liquid viscosity, flash point and oxidation, critical breakdown field strength, liquefaction temperature, GWP100Atmospheric lifetime and ODP;
the toxicity test comprises: LC 50.
Optionally, the target performance parameters include: GWP100Atmospheric lifetime, ODP, critical breakdown field strength, liquefaction temperature, flammability, LC50, price per unit volume, and ignition point.
Optionally, obtaining a composite score of the target green insulating gas according to the target performance parameter includes:
calculating the score of each performance parameter according to the target performance parameter, and calculating the score of each performance parameter according to the following formula:
wherein k isiScore, G, representing a target performance parameteriRepresents SF6Score, x, of the ith parameter of gasiSize, y, of the i-th parameter representing the target green insulating gasiRepresents SF6The magnitude of the parameter of item i of the gas;
calculating the comprehensive score of the target green insulating gas according to the score of each performance parameter and the following formula:
wherein S represents a target green insulating gasOverall score of body, wiWeight, k, representing a target performance parameteriA score representing a target performance parameter.
The embodiment discloses a screening method of green insulating gas, which comprises the following steps: obtaining candidate gas meeting the preliminary screening condition from a database; then screening target green insulating gas which meets the insulating screening condition from the candidate gas; detecting the performance parameters of the target green insulating gas; then obtaining target performance parameters of the target green insulating gas according to the performance parameters and the cost of the target green insulating gas; acquiring a comprehensive score of the target green insulating gas according to the target performance parameters; and finally, screening out the final green insulating gas according to the comprehensive score of the target green insulating gas.
By adopting the screening method, the complete steps from the database screening to the comprehensive evaluation of the gas are completely built, the green insulating gas meeting the conditions is effectively screened according to the comprehensive score, the screening cost is saved, the comprehensive evaluation of toxicity, safety and application performance is carried out on the green insulating gas, the research on the green insulating gas is guided, the screening efficiency is improved, and the resources are saved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a screening method of a green insulating gas according to an embodiment of the present disclosure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The application provides a screening method of green insulating gas, which aims to solve the problems that the existing screening method of green insulating gas has no definite directionality, is low in screening efficiency and can cause huge waste of personnel and resources.
Referring to fig. 1, there is shown a method of screening green insulating gas, the method comprising:
step S1, candidate gases meeting the preliminary screening conditions are obtained from the database.
Wherein the database is a gas substance database, and comprises existing gas and non-synthesized gas;
the purpose of this step is to eliminate the gas that does not meet the preliminary screening conditions from the huge database candidate gas, the scope of narrowing, the work load of reducing the screening of green insulating gas.
And step S2, screening the target green insulating gas meeting the insulating screening condition from the candidate gases.
Optionally, the insulation screening condition is according to SF6The relative dielectric strength determined by the gas.
Since green insulating gas is mainly used in gas-insulated devices, especially in high-voltage electrical devices, as a replacement for SF6The gas has insulating and arc-extinguishing properties, and therefore the screening conditions in this step are the relative SF of the gas6Insulation strength value of, e.g. relating insulation strength in candidate gas to SF6The gas having a difference in dielectric strength value within a certain threshold value is used as the target green dielectric gas. The specific insulation strength can be obtained by using an existing calculation or test method, and is not particularly limited in this embodiment.
Step S3, detecting a performance parameter of the target green insulating gas.
Optionally, detecting a performance parameter of the target green insulating gas comprises:
when the target green insulating gas is the existing gas, performing physical property detection and toxicity detection on the existing gas to obtain performance parameters of the target insulating gas;
when the target green insulating gas is not the existing gas, a synthesis route of the target insulating gas is designed, a test sample is obtained according to the synthesis route, and physical property detection and toxicity detection are carried out on the test sample to obtain performance parameters of the target insulating gas.
In this step, the target green insulating gas that meets the insulation screening conditions screened in step S2 is further detected (including physical property detection and toxicity detection), and performance parameters of the target green insulating gas are obtained. Before detection, firstly, determining whether a target green insulating gas is a substance existing in nature, namely judging whether the target green insulating gas is an existing gas, and if the target green insulating gas is the existing gas, directly carrying out physical property detection and toxicity detection on the target green insulating gas to obtain performance parameters of the target insulating gas; if the target green insulating gas is not the existing gas, firstly, an optimal synthesis route of the target insulating gas needs to be designed, a test sample is obtained according to the designed synthesis route, and finally, physical property detection and toxicity detection are carried out on the test sample to obtain the performance parameters of the target insulating gas.
Step S4, obtaining a target performance parameter of the target green insulating gas according to the performance parameter and cost of the target green insulating gas.
In this step, the target performance parameter is the replaceable SF of the target green insulating gas6The gas is used as an index parameter of the insulating gas of the gas insulating equipment, and is obtained based on comprehensive evaluation in the aspects of toxicity, safety, application performance, cost and the like, and the parameter is used as a target performance parameter for evaluating the target green insulating gas.
And step S5, acquiring the comprehensive score of the target green insulating gas according to the target performance parameters.
In this step, first, based on the target performance parameters (i.e., evaluation indexes) obtained in step S4, each target performance parameter is calculated with respect to SF6And (4) the score of the gas is obtained, and then the weight of each target performance parameter is integrated to obtain the integrated score of the target green insulating gas.
In step S6, the final green insulating gas is screened out based on the total score of the target green insulating gas.
In this step, the target characteristics are obtained in step S5The method can perform parameter comprehensive scoring, finally takes the target green insulating gas with the highest comprehensive score as the screened final green insulating gas, and obtains ideal substitute SF (sulfur hexafluoride) through comprehensive detection and comprehensive scoring from screening to comprehensive evaluation6Green insulating gas of gas.
The embodiment discloses a screening method of green insulating gas, which comprises the following steps: obtaining candidate gas meeting the preliminary screening condition from a database; then screening target green insulating gas which meets the insulating screening condition from the candidate gas; detecting the performance parameters of the target green insulating gas; then obtaining target performance parameters of the target green insulating gas according to the performance parameters and the cost of the target green insulating gas; acquiring a comprehensive score of the target green insulating gas according to the target performance parameters; and finally, screening out the final green insulating gas according to the comprehensive score of the target green insulating gas.
By adopting the screening method, the complete steps from the database screening to the comprehensive evaluation of the gas are completely built, the green insulating gas meeting the conditions is effectively screened according to the comprehensive score, the screening cost is saved, the comprehensive evaluation of the toxicity, the safety and the application performance of the green insulating gas is carried out, and the guiding effect is played for the research of the green insulating gas.
Optionally, the preliminary screening conditions include: number of atoms, GWP100Acute toxicity, critical temperature, flammability and chemical stability.
Wherein, the atom number, GWP and critical temperature are obtained by carrying out corresponding simulation calculation through a computer program; calculating the chemical stability of the gas through Bond Dissociation Energy (BDE); acute toxicity was obtained from the FAF-Drugs2 database.
Optionally, the physical property detection comprises: boiling point, chemical stability, flammability, ignition point, freezing point, saturated vapor pressure, gas liquid density, solubility in water, critical temperature, critical pressure, critical density, enthalpy of vaporization (101.3kpa), gas and liquid constant pressure specific heat, gas and liquid constant volume specific heat, surface tension, gas and liquid viscosityFlash point and oxidation, critical breakdown field strength, liquefaction temperature, GWP100Atmospheric lifetime and ODP; the toxicity test comprises: LC 50.
In this embodiment, the existing detection method is used to comprehensively detect the target green insulating gas to accurately determine the physical properties and toxicity of the target green insulating gas, and the property detection in this embodiment is performed on the gas that can be directly applied, instead of the parameters searched in the database in step S1, so that the detection in this embodiment is more accurate and comprehensive than that in step S1.
The detection indexes of the physical property detection comprise boiling point, chemical stability, flammability, ignition point, freezing point, saturated vapor pressure, gas liquid density, water solubility, critical temperature, critical pressure, critical density, evaporation enthalpy (101.3kpa), gas and liquid constant pressure specific heat, gas and liquid constant volume specific heat, surface tension, gas and liquid viscosity, flash point and oxidizability, critical breakdown field strength, liquefaction temperature and GWP100The critical breakdown field strength refers to the insulation strength of gas, and the specific detection method of the detection index can adopt the existing detection method, and the detailed description is omitted here.
The toxicity test comprises: acute toxicity detection and chronic toxicity detection, and calculating to obtain an LC50 value to judge the toxicity of the target green insulating gas so as to determine whether the target green insulating gas is suitable as the insulating gas.
Optionally, the target performance parameters include: GWP100Atmospheric lifetime, ODP, critical breakdown field strength, liquefaction temperature, flammability, LC50, price per unit volume, and ignition point.
The target performance parameter index in this embodiment is a target performance parameter obtained by comprehensively considering toxicity, safety, application performance, cost, and the like based on a performance parameter detected by a target green insulating gas and the cost of the target green insulating gas, where values of GWP100, atmospheric lifetime, ODP, critical breakdown field strength, liquefaction temperature, flammability, LC50, and ignition point are already obtained in step S3, and the price per unit volume can be obtained according to market price.
Optionally, obtaining a composite score of the target green insulating gas according to the target performance parameter includes:
calculating the score of each performance parameter according to the target performance parameter, and calculating the score of each performance parameter according to the following formula:
wherein k isiScore, G, representing a target performance parameteriRepresents SF6Score, x, of the ith parameter of gasiSize, y, of the i-th parameter representing the target green insulating gasiRepresents SF6The magnitude of the parameter of item i of the gas;
calculating the comprehensive score of the target green insulating gas according to the score of each performance parameter and the following formula:
wherein S represents a composite score of the target green insulating gas, wiWeight, k, representing a target performance parameteriA score representing a target performance parameter.
In this example, i represents GWP100Atmospheric lifetime, ODP, critical breakdown field strength, liquefaction temperature, flammability, LC50, price per unit volume, and ignition point.
In the formula for calculating the scores of the performance parameters, when the ith parameter is a beneficial parameter such as the insulation strength, the ith parameter is a plus sign; when the parameter of the ith item is a negative parameter such as GWP, the negative parameter is the minus sign. SF6G of (A)1-G8Respectively as follows: 1. 1, 100; in the formula for calculating the composite score of the target green insulating gas, w1-w8Respectively 0.1, 0.2, 0.1.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (7)
1. A method for screening green insulating gas, comprising:
obtaining candidate gas meeting the preliminary screening condition from a database;
screening target green insulating gas meeting insulating screening conditions from the candidate gas;
detecting a performance parameter of the target green insulating gas;
obtaining target performance parameters of the target green insulating gas according to the performance parameters and the cost of the target green insulating gas;
acquiring a comprehensive score of the target green insulating gas according to the target performance parameters;
and screening out the final green insulating gas according to the comprehensive score of the target green insulating gas.
2. The screening method according to claim 1, wherein the preliminary screening conditions include: number of atoms, GWP100Acute toxicity, critical temperature, flammability and chemical stability.
3. The screening method according to claim 1, wherein the insulation screening condition is according to SF6The relative dielectric strength determined by the gas.
4. The screening method of claim 1, wherein detecting a performance parameter of the target green insulating gas comprises:
when the target green insulating gas is the existing gas, performing physical property detection and toxicity detection on the existing gas to obtain performance parameters of the target insulating gas;
when the target green insulating gas is not the existing gas, a synthesis route of the target insulating gas is designed, a test sample is obtained according to the synthesis route, and physical property detection and toxicity detection are carried out on the test sample to obtain performance parameters of the target insulating gas.
5. The screening method according to claim 4,
the physical property detection includes: boiling point, chemical stability, flammability, ignition point, freezing point, saturated vapor pressure, gas-liquid density, solubility in water, critical temperature, critical pressure, critical density, enthalpy of vaporization (101.3kpa), gas and liquid constant pressure specific heat, gas and liquid constant volume specific heat, surface tension, gas and liquid viscosity, flash point and oxidation, critical breakdown field strength, liquefaction temperature, GWP100Atmospheric lifetime and ODP;
the toxicity test comprises: LC 50.
6. The screening method of claim 5, wherein the target performance parameters include: GWP100Atmospheric lifetime, ODP, critical breakdown field strength, liquefaction temperature, flammability, LC50, price per unit volume, and ignition point.
7. The screening method of claim 1, wherein obtaining a composite score for the target green insulating gas based on the target performance parameter comprises:
calculating the score of each performance parameter according to the target performance parameter, and calculating the score of each performance parameter according to the following formula:
wherein k isiScore, G, representing a target performance parameteriRepresents SF6Score, x, of the ith parameter of gasiGreen insulating gas for representing targetSize of the ith parameter of the volume, yiRepresents SF6The magnitude of the parameter of item i of the gas;
calculating the comprehensive score of the target green insulating gas according to the score of each performance parameter and the following formula:
wherein S represents a composite score of the target green insulating gas, wiWeight, k, representing a target performance parameteriA score representing a target performance parameter.
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Application publication date: 20200214 |