CN115791252A - SF 6 Method for obtaining decomposition product of breaker grease during arc discharge - Google Patents
SF 6 Method for obtaining decomposition product of breaker grease during arc discharge Download PDFInfo
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Abstract
The invention discloses an SF 6 The method for obtaining the decomposition product of the breaker grease during arc discharge comprises the following steps of carrying out isotope labeling treatment on elements in a grease material; coating the lubricating grease material marked by the isotope inside a sulfur hexafluoride breaker, and then carrying out an arc discharge test; and (3) collecting and analyzing products in the arc discharge test process to obtain a source of the isotope element, and finishing the judgment of the influence of the sulfur hexafluoride circuit breaker lubricating grease material on the arc discharge decomposition products. The method utilizes the lubricating grease material marked by the isotope to carry out the arc discharge test, and then the products in the arc discharge test process are collected and analyzed, so that the sources of all elements in the products are effectively obtained, and the decomposition product of the lubricating grease material in the sulfur hexafluoride circuit breaker on the arc discharge is effectively determinedInfluence of substance, effectively improves SF 6 Accuracy of decomposition product analysis in diagnosing grease-related latent faults.
Description
Technical Field
The invention belongs to the technical field of electric power, and relates to SF 6 A method for obtaining decomposition products of breaker grease during arc discharge.
Background
Sulfur hexafluoride (SF) 6 ) The sulfur hexafluoride has excellent insulation and arc extinguishing performance and stable chemical characteristics, so that the circuit breaker is widely applied to power systems. Meanwhile, compared with the electrical equipment consisting of the traditional insulating medium, the insulating medium has the advantages of small occupied area, low operation failure rate, convenience in transportation and installation and the like, and therefore the insulating medium occupies a main position in the high-voltage and ultrahigh-voltage fields. The research on the fault condition and the operation reliability of sulfur hexafluoride insulation equipment plays an important role in improving the operation stability of the equipment and reducing the accident rate of a power grid. Three types of discharge phenomena, partial discharge, spark discharge and arc discharge, in which SF may manifest varying degrees of dischargeability failure 6 Complex decomposition occurs under overheat and discharge conditions, and unstable fluoride produced may react with moisture and oxygen impurities present inside the apparatusFurther reaction produces sulfur-containing compounds, and the solid insulating material and metal member components release C atoms to produce carbon-containing compounds. Some of these products are further detrimental to the insulation properties of the equipment due to their corrosive nature, and SF is chosen as the material 6 The content and source tracing analysis of the decomposition characteristic products shows that the characteristic products can reflect SF 6 Different fault types and fault degrees of gas-insulated equipment. Thus, study of SF 6 The decomposition products and the relation between the decomposition products and the insulation fault have certain practical significance and application value. The lubricating grease has important influence on the stability and reliability of high-voltage gas insulation equipment, and for a Gas Insulated Switchgear (GIS), three types of operation mechanism lubrication, sealing lubrication and electrical contact lubrication are mainly adopted. Because the performance requirement of the high-temperature and high-pressure environment inside the high-pressure gas insulation equipment on the lubricating grease is higher, the common lubricating grease is difficult to meet, and therefore, the molybdenum disulfide lithium-based lubricating grease is adopted. The lubricating grease mainly comprises two parts, namely base oil and a thickening agent, wherein the main components of the base oil are perfluoropolyether, synthetic ester and polyethylene glycol, the main components of the thickening agent are polytetrafluoroethylene and fatty acid lithium soap thickened mineral oil, and the fatty acid lithium soap is generated by the reaction of stearic acid and lithium hydroxide. The molybdenum disulfide lithium-based lubricating grease is added with molybdenum disulfide additive powder on the basis of main components, has more outstanding extreme pressure and wear resistance and better mechanical and oxidation stability, and further prolongs the grease changing period.
Related art to SF 6 The research on the influence of the lubricating grease on the decomposition products in the circuit breaker mainly comprises the steps of carrying out a breaking test on equipment with preset latent faults such as excessive lubricating grease coating and the like, analyzing the type and content change of the decomposition products, comparing the type and content change with equipment which normally runs to obtain a characteristic decomposition product with a brand-new type or obviously increased content, explaining the intrinsic relation between the characteristic decomposition product and the latent faults such as excessive lubricating grease coating through theoretical analysis, and indirectly obtaining the influence of the lubricating grease on the decomposition products. The research method cannot effectively eliminate the influence of other materials in the equipment on the content of decomposition products, and cannot clearly determine the SF of the lubricating grease 6 The influence of the decomposition products can not visually indicate the sources of key elements in the decomposition products and can not be classifiedThe formation path of decomposition products is clarified by a sub-level microscopic view angle, and SF is severely limited 6 And (3) the accuracy of the analysis method of the decomposition products in diagnosing the latent faults related to the lubricating grease.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides SF 6 The method for obtaining the decomposition product of the circuit breaker lubricating grease during the arc discharge effectively solves the problem that the prior art can not clearly determine the SF of the lubricating grease 6 The influence of the decomposition products and the technical problem that the sources of key elements in the decomposition products cannot be visually indicated.
The invention is realized by the following technical scheme:
SF (sulfur hexafluoride) 6 The method for obtaining the decomposition product of the breaker grease during arc discharge comprises the following steps:
s1: carrying out isotope labeling treatment on elements in the lubricating grease material;
s2: coating the lubricating grease material marked by the isotope inside a sulfur hexafluoride breaker, and then carrying out an arc discharge test;
s3: collecting and analyzing the product in the arc discharge test process to obtain the source of the isotope element and obtain SF 6 Decomposition products of breaker grease during arc discharge.
Preferably, in step S3, the products in the arc discharge test process are collected and analyzed by using a gas chromatography-mass spectrometry combined detection method.
Preferably, in the step S1, at least two of C, H and O elements are selected and subjected to an isotopic labeling treatment.
Preferably, in the step S2, the isotope-labeled grease material is specifically applied to a lubricating position of an operating mechanism, a lubricating position of an electrical contact, and a sealing lubricating position of the sulfur hexafluoride breaker.
Preferably, the step S1 specifically includes: isotope-labeled lubricating grease raw materials are obtained by utilizing isotope-labeled lubricating grease to prepare elements in raw material components, and then isotope-labeled lubricating grease materials are prepared by utilizing the isotope-labeled lubricating grease raw materials.
Preferably, the lubricating grease preparation raw material comprises base oil and a thickening agent, the base oil comprises synthetic ester and polyethylene glycol, and the thickening agent comprises polytetrafluoroethylene; and carrying out isotope labeling on the synthetic ester, polyethylene glycol and polytetrafluoroethylene.
Preferably, the isotopic labeling process of the polyethylene glycol specifically comprises: the ethylene oxide is isotopically labeled, and then the isotopically labeled ethylene oxide is used to prepare the isotopically labeled polyethylene glycol.
Preferably, the C, H and O elements of the ethylene oxide are isotopically labelled.
Preferably, the isotope labeling process of the polytetrafluoroethylene specifically comprises: and carrying out isotope labeling on the monomer tetrafluoroethylene, and then carrying out polymerization reaction by using the isotope-labeled monomer tetrafluoroethylene to prepare the isotope-labeled polytetrafluoroethylene.
Preferably, the monomer tetrafluoroethylene is isotopically labeled with C element.
Compared with the prior art, the invention has the following beneficial technical effects:
SF (sulfur hexafluoride) 6 The method comprises the steps of carrying out an arc discharge test by utilizing an isotope-labeled lubricating grease material, then, carrying out acquisition and analysis on a product in the arc discharge test process, effectively obtaining sources of all elements in the product, effectively determining the decomposition product of the lubricating grease material in the sulfur hexafluoride breaker in the arc discharge process, and effectively determining the decomposition product of the lubricating grease material in the sulfur hexafluoride breaker in the arc discharge process 6 Effectively improves SF due to the influence of decomposition products 6 Accuracy of decomposition product analysis in diagnosing grease-related latent faults.
Furthermore, products in the arc discharge test process are collected and analyzed by a gas chromatography-mass spectrometry combined detection method, so that the detection and analysis accuracy is effectively improved.
Furthermore, at least two of C, H and O elements are selected for isotopic labeling treatment, so that the lubricating grease and other materials containing C, H and O elements can be effectively distinguished from SF 6 Of the productDifferent effects.
Furthermore, the lubricating grease material after the isotope labeling is specifically coated on the lubricating position of the operating mechanism, the lubricating position of the electrical contact and the sealing lubricating position of the sulfur hexafluoride circuit breaker, thereby effectively ensuring SF 6 And (5) normal operation of the circuit breaker.
Furthermore, the synthetic ester, the polyethylene glycol and the polytetrafluoroethylene are isotopically labeled, so that the SF of the lubricating grease can be comprehensively reflected 6 Influence of the product.
Furthermore, the isotopic labeling of C, H and O elements of the ethylene oxide is favorable for the comprehensive research of all elements in the ethylene oxide on SF 6 Different effects of the product.
Furthermore, the isotope labeling is carried out on the C element of the monomer tetrafluoroethylene, which is favorable for researching the SF of the C element of the tetrafluoroethylene 6 The influence of carbon-containing compounds in the decomposition products.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic flow chart of a method for determining the influence of a sulfur hexafluoride circuit breaker grease material on arc discharge decomposition products according to the present invention;
FIG. 2 is a flow chart of the preparation of isotopically labeled polyethylene glycol;
FIG. 3 is a flow chart of the preparation of isotopically labeled polytetrafluoroethylene;
FIG. 4 is a flow chart of the process for manufacturing isotope-labeled grease in accordance with the present invention;
FIG. 5 is a wiring diagram for the arc discharge test used in the present invention.
Wherein: 1. capacitor bank, 2, main switch, 3, reactor, 4, SF 6 A circuit breaker, 5, a high-voltage probe, 6, an air core coil,7. an oscilloscope.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed and interpreted as including, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
see FIG. 1, an SF 6 The method for obtaining the decomposition product of the breaker grease during arc discharge comprises the following steps:
s1: the isotope-labeled grease material is obtained by labeling at least one of C, H and O elements in the grease material with the isotope.
The method specifically comprises the following steps: isotope-labeled lubricating grease raw materials are obtained by utilizing isotope-labeled lubricating grease to prepare elements in raw material components, and then isotope-labeled lubricating grease materials are prepared by utilizing the isotope-labeled lubricating grease raw materials. The lubricating grease is prepared from raw materials comprising base oil and a thickening agent, wherein the base oil comprises synthetic ester and polyethylene glycol, and the thickening agent comprises polytetrafluoroethylene; and carrying out isotope labeling on the synthetic ester, polyethylene glycol and polytetrafluoroethylene. The isotope labeling process of the polyethylene glycol comprises the following specific steps: isotopically labeling ethylene oxide, and then preparing isotopically labeled polyethylene glycol by using the isotopically labeled ethylene oxide, wherein C, H and O elements of the ethylene oxide are isotopically labeled. Meanwhile, the isotope labeling process of the polytetrafluoroethylene specifically comprises the following steps: and carrying out isotope labeling on the monomer tetrafluoroethylene, and then carrying out polymerization reaction by using the isotope-labeled monomer tetrafluoroethylene to prepare isotope-labeled polytetrafluoroethylene, wherein the C element of the tetrafluoroethylene monomer is subjected to isotope labeling.
More specifically, as shown in fig. 2, the preparation process of the isotopically labeled polyethylene glycol is described. The ethylene oxide which is marked by C, H and O elements through isotopes has polymerization reaction under the catalysis of aluminum isopropoxide, and the polyethylene glycol marked by the isotopes is obtained through distillation, crystallization, precipitation, filtration and vacuum drying.
More specifically, as shown in fig. 3, the preparation process of the isotope-labeled polytetrafluoroethylene is described. Reacting C-marked trifluorodichloroethane and chlorotetrafluoroethane with hydrogen fluoride in a certain proportion to obtain tetrafluorodichloroethane (C) 2 Cl 2 F 4 ) Reacting with zinc to generate tetrafluoroethylene, and polymerizing to obtain the isotope-labeled polytetrafluoroethylene.
Fig. 4 is a process flow chart of the present embodiment for preparing isotope-labeled grease. Specifically, in the charging stage, the base oil is stirred and heated, when the temperature reaches 50 ℃, the synthetic ester, the hollow microspheres and the polytetrafluoroethylene are added, the temperature is continuously raised, the acid for saponification is added, and the temperature is continuously raised after the temperature is raised to 75 ℃ and the lithium hydroxide is added. The saponification reaction stage is kept at constant temperature and constant pressure, the saponification reaction stage enters an exhaust stage after a certain reaction time, and the saponification reaction stage is kept at constant temperature and constant speed in the exhaust process. And continuously heating to enter a high-temperature refining stage, adding the intermediate oil at a constant speed, heating and keeping constant temperature. The material was allowed to enter the quench kettle, transferred to the quench stage and controlled at 165 ℃. Under the stirring action, adding additives such as a structure improving agent, molybdenum disulfide, a metal surface passivator and the like, and continuously stirring for a certain time. And finally, entering a degassing and homogenizing stage, and finally obtaining the isotope-labeled molybdenum disulfide lithium-based lubricating grease by using a vacuum tank.
S2: the obtained molybdenum disulfide lithium-based grease was applied to SF for testing 6 Lubrication and sealing in circuit breaker to ensure SF 6 The circuit breaker can work normally. Specifically, the lubricating grease material after isotope labeling is coated on the lubricating position of an operating mechanism, the lubricating position of an electrical contact and the sealing lubricating position of the sulfur hexafluoride breaker. The arc discharge test was carried out under safety-assured conditions, as shown in FIG. 5 for SF used in the present invention 6 Wiring diagram for arc discharge test of circuit breaker. As can be seen from FIG. 5, the arc discharge test is performed by the capacitor bank 1, the main switch 2, and the power supplyReactor 3,SF 6 The circuit breaker comprises a circuit breaker 4, a high-voltage probe 5, an air core coil 6 and an oscilloscope 7, wherein an LC oscillation circuit provides test current with the frequency of 50Hz, the capacitance of a capacitor bank 1 is 89.68mF, the reactance value of a reactor 3 is 0.1130mH, a main switch is closed firstly, and the SF is matched with the main switch in a time sequence manner 6 The circuit breaker contacts are separated to complete the breaking process, the high-voltage probe 5 and the hollow coil 6 are connected with the oscilloscope 7 to complete the measurement and record of arc voltage, arc current waveform and other data, the breaking current grade is designed to be 10kA, the breaking frequency is designed to be 5 times, and SF (sulfur hexafluoride) reduction is utilized within a certain time after each breaking is finished 6 The sampling device for processing the adsorption capacity of the decomposition product samples the gas in the gas chamber, closely pays attention to the tightness of a sampling channel and a connection part, and ensures the consistency of the on-off condition of each time and the noninterference of the sampling operation.
S3: SF obtained by sampling by utilizing detection equipment 6 Detecting and recording the type and concentration of the product labeled with the isotope in the product. General SF 6 The decomposition products are mainly SOF 4 、SOF 2 、SO 2 、SO 2 F 2 、CF 4 、CO 2 、CO、CH 4 、H 2 And the like. In order to ensure effective detection and analysis, the invention designs a gas chromatography-mass spectrometry combined detection method for detecting gas product components, and sets the following parameters after debugging the carrier gas flow, sample introduction volume, column box temperature, sample introduction port temperature, solvent delay time, detector acquisition mode, ion source temperature and split flow ratio of a gas chromatography-mass spectrometry combined instrument:
specifically, in one embodiment of the present invention, the instrument detection parameters are as follows:
(1) Carrier gas flow: helium, 1.5mL/min;
(2) Sample introduction volume: 300 mu L;
(3) Temperature of the column box: keeping the temperature at 45 ℃ for 6min, increasing the temperature to 220 ℃ at 15 ℃/min, and keeping the constant temperature until the analysis is finished;
(4) Sample inlet temperature: 175 ℃;
(5) Solvent delay time: 3min;
(6) The acquisition mode of the detector is as follows: GC/MS;
(7) Ion source temperature: EI, the temperature is 220 ℃;
(8) The split ratio is as follows: 15:1
According to SF 6 The decomposition product contains the concentration proportion and change data of the component containing the marked isotope, the source and the reaction mechanism of the product containing the C, H and O element isotopes are researched, the product containing the isotope mark and the product not containing the isotope mark are compared and analyzed, and the influence of the lubricating grease on the product is analyzed and determined from the two aspects of the generation of the marked and unmarked element products.
In particular, to detect SF under arcing conditions 6 Taking CO gas in the gas product as an example, after each cut-off test is carried out, the gas in the gas chamber is sampled and the content of CO in the gas is detected. Detecting whether isotopically-labeled C element, i.e., part of isotopically-labeled C element, is present in CO molecules in the gas sample 13 CO is present if 13 If CO exists, at least one component of the synthetic ester, the polyethylene glycol and the polytetrafluoroethylene in the lubricant can be subjected to oxidation reaction to generate CO, and the CO molecule is determined 13 The ratio of CO is increased, thereby further obtaining the ratio of the lubricant material to SF 6 Influence of the product. It is to be noted that it is intended to further clarify which component pair in the grease forms SF 6 The CO product in the gas has direct influence, and a plurality of isotopes are needed to label and distinguish the C elements in different components, so that the different degrees of the different components are determined according to the ratio of the isotopes in the CO gas. Can be further based on 13 The change trend of the content change of CO along with the increase of the on-off times can analyze the influence of the discharge times on the lubricating grease material. In the same way, in the detection product 2 H 2 Content can be studied for generating H by polyethylene glycol or synthetic ester in lubricating grease 2 Influence of the product, detecting in the product 13 CH 4 The content of the CH can be researched, and the generation of CH by polyethylene glycol or synthetic ester or polytetrafluoroethylene in lubricating grease can be researched 4 The influence of (c). It should be noted that in the present embodiment, the sample components are required to be representative in the process of collecting the gas sample, i.e. the SF can be more comprehensively represented 6 Gaseous products, the need to avoid sampling component concentrations andthe concentration of each component in the actual air chamber is inconsistent.
In summary, the present invention discloses an SF 6 A method for obtaining the decomposition products of the lubricating grease of circuit breaker in arc discharge includes such steps as marking the C, H and O elements on the raw material of lubricating grease, tracing the elements and components of lubricating grease, arc discharge test, and chromatography-mass spectrometry detection 6 Detecting and analyzing the gas decomposition products, analyzing the generation mechanism and the obvious characteristics of different components, and finding out the lubricating grease component and SF embodied by the product containing the isotope label 6 The reaction path and reaction products of gas interaction in the gas chamber of the circuit breaker have certain auxiliary functions on the judgment and diagnosis of the lubricating grease faults which may occur in the field operation process.
The invention discloses an SF 6 Method for obtaining decomposition product of breaker grease during arc discharge, prepared grease with isotope labeling material is coated on SF 6 In gas-insulated devices, to replace the grease which has not been marked. Performing arc discharge test, and obtaining SF by chromatography-mass spectrometry 6 The product containing the marking element in the gas decomposition product further obtains the content and concentration ratio of the product, thereby being capable of accurately tracing the molecular and atomic source ways of the marked product. The method comprises the steps of marking C, H and O elements in a lubricating grease material by using an isotope tracing technology, coating the marked lubricating grease into a sulfur hexafluoride breaker, carrying out an arc discharge test, carrying out qualitative and quantitative detection and analysis on a sulfur hexafluoride gas decomposition product by using a chromatography-mass spectrometry combined detection method, selecting a characteristic component with strong relevance to lubricating grease faults, and analyzing a generation rule and a reaction path of the characteristic component by using an isotope tracing method. Compared with the prior art, the method solves the problems of selection and traceability of the lubricating grease fault characteristic decomposition products, realizes accurate judgment of the thermoelectric corrosion degree of the lubricating grease of the sulfur hexafluoride circuit breaker, improves the diagnosis accuracy of the latent fault of the sulfur hexafluoride circuit breaker, and provides powerful data support for the operation state and the electric service life evaluation of the sulfur hexafluoride circuit breaker. The invention discloses a sulfur hexafluoride circuit breakA method for researching the influence of lubricating grease material on arc discharge decomposition products includes such steps as preparing sulfur hexafluoride breaker lubricating grease from isotope-labeled raw material, arc discharge test by using the labeled lubricating grease as variable, comparing the products by detecting unit, and analyzing different components in lubricating grease and SF by isotope tracer technique 6 The reaction mechanism of the decomposition products explores the generation rule of carbon, oxygen and hydrogen containing substances related to the lubricating grease. The invention solves the problem of SF 6 The circuit breaker lubricating grease material has an unclear influence on arc discharge products, the problems of tracing and reaction paths are mainly solved by utilizing isotope tracing, and the circuit breaker lubricating grease material has a good technical effect.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. SF (sulfur hexafluoride) 6 The method for obtaining the decomposition product of the circuit breaker lubricating grease during arc discharge is characterized by comprising the following steps of:
s1: carrying out isotope labeling treatment on elements in the lubricating grease material;
s2: coating the lubricating grease material marked by the isotope inside a sulfur hexafluoride breaker, and then carrying out an arc discharge test;
s3: collecting and analyzing the product in the arc discharge test process to obtain the source of the isotope element and obtain SF 6 Decomposition products of breaker grease during arc discharge.
2. SF according to claim 1 6 The method for obtaining the decomposition product of the breaker lubricating grease during the arc discharge is characterized in that in the step S3, a gas chromatography-mass spectrometry combined detection method is used for collecting and analyzing the product in the arc discharge test process.
3. SF according to claim 1 6 The method for obtaining the decomposition product of the breaker grease during arc discharge is characterized in that in the step S1, at least two of C, H and O elements are selected for isotopic labeling treatment.
4. SF according to claim 1 6 The method for obtaining the decomposition products of the circuit breaker lubricating grease during arc discharge is characterized in that in the step S2, the lubricating grease material marked by the isotope is specifically coated on the lubricating position of an operating mechanism, the lubricating position of an electrical contact and the lubricating position of a sealing of a sulfur hexafluoride circuit breaker.
5. SF according to claim 1 6 The method for obtaining the decomposition product of the breaker lubricating grease during arc discharge is characterized in that the step S1 specifically comprises the following steps: isotope-labeled lubricating grease raw materials are obtained by utilizing isotope-labeled lubricating grease to prepare elements in raw material components, and then isotope-labeled lubricating grease materials are prepared by utilizing the isotope-labeled lubricating grease raw materials.
6. SF according to claim 5 6 The method for obtaining the decomposition product of the circuit breaker lubricating grease during arc discharge is characterized in that the lubricating grease preparation raw materials comprise base oil and a thickening agent, the base oil comprises synthetic ester and polyethylene glycol, and the thickening agent comprises polytetrafluoroethylene; and carrying out isotope labeling on the synthetic ester, the polyethylene glycol and the polytetrafluoroethylene.
7. SF according to claim 6 6 The method for obtaining the decomposition product of the breaker lubricating grease during arc discharge is characterized in that the isotope labeling process of the polyethylene glycol specifically comprises the following steps: the ethylene oxide is isotopically labeled, and then the isotopically labeled ethylene oxide is used to prepare the isotopically labeled polyethylene glycol.
8. SF according to claim 7 6 The method for obtaining the decomposition products of the breaker grease during arc discharge is characterized in that C, H and O elements of the ethylene oxide are labeled by isotopes.
9. SF according to claim 6 6 The method for obtaining the decomposition product of the breaker lubricating grease during arc discharge is characterized in that the isotope labeling process of the polytetrafluoroethylene specifically comprises the following steps: and carrying out isotope labeling on the monomer tetrafluoroethylene, and then carrying out polymerization reaction by using the isotope-labeled monomer tetrafluoroethylene to obtain isotope-labeled polytetrafluoroethylene.
10. An SF according to claim 9 6 The method for obtaining the decomposition product of the breaker grease during arc discharge is characterized in that the C element of the monomer tetrafluoroethylene is labeled by isotope.
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