Multi-parameter coupling evaluation method and system for compatibility of environment-friendly gas distribution switch equipment

Abstract

The invention provides a multi-parameter coupling evaluation method and system for compatibility of environment-friendly gas distribution switch equipment, and belongs to the technical field of power equipment state evaluation. According to the method, a closed gas-solid compatibility test system is constructed, and under the conditions of different oxygen volume fractions, air pressures, temperatures and time, thermal aging treatment is performed on the metal and the insulating material, so that a decomposition product change rule and material surface topography and component evolution characteristics are obtained. According to the method, gas chromatography, infrared analysis and scanning electron microscope technologies are combined, key indexes such as gas concentration variation, oxide layer thickness and quality change rate are extracted, a weighted scoring model is established, long-term compatibility of materials and gas is quantitatively evaluated, compatibility grades are divided according to the long-term compatibility, and an optimized feedback strategy is generated based on the compatibility grades. The method is suitable for material selection, state evaluation and reliability improvement of the environment-friendly gas distribution switch equipment, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of power equipment condition assessment technology, specifically to a multi-parameter coupled evaluation method and system for the compatibility of environmentally friendly gas power distribution switchgear. Background Technology

[0002] along with The use of gases is subject to environmental restrictions, and environmentally friendly alternative gases (such as...) Dry air , The application of environmentally friendly gases (such as those used in power distribution switchgear) is becoming increasingly widespread. However, the insulation properties, decomposition characteristics, and material compatibility of these gases differ from those of traditional... Significant differences exist, especially under complex conditions such as long-term operation and thermal aging, which may lead to problems such as corrosion of metal parts and deterioration of insulation performance, affecting equipment life and operational safety. Existing research mostly focuses on the breakdown performance or short-term thermal stability evaluation of the environmentally friendly gases themselves. There is still a lack of systematic and quantifiable assessment methods for the compatibility between the gas and the internal materials of the equipment (such as copper, aluminum, stainless steel, epoxy resin, etc.) and the gas-material interaction law after aging. There is also a lack of technical paths to feed the assessment results back to equipment optimization.

[0003] Therefore, it is urgent to establish a coupled evaluation method for gas-material compatibility under multi-factor conditions and propose measures to improve material reliability, thereby constructing an engineering closed loop for improving the operational reliability of environmentally friendly gas-insulated equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one technical problem existing in the prior art and to provide a multi-parameter coupling evaluation method and system for the compatibility of environmentally friendly gas power distribution switchgear.

[0005] On one hand, embodiments of the present invention provide a multi-parameter coupled evaluation method for the compatibility of environmentally friendly gas power distribution switchgear. The evaluation method includes: Step S1, constructing a gas-solid compatibility accelerated aging experimental system and setting experimental parameters; Step S2, placing material samples in the experimental system, using N groups of mixed gases with varying oxygen volume fractions as experimental gases, and conducting thermal aging experiments under the set experimental parameters; Step S3, after each experiment, collecting the aged experimental gas samples and performing component analysis to obtain the corresponding concentration changes of key decomposition products; Step S4, after each experiment, analyzing the aging results... The material samples were subjected to microscopic morphology observation and elemental composition analysis to extract quantitative indicators of surface damage, including oxide layer thickness and mass change rate. Step S5: Based on the concentration change, oxide layer thickness, and mass change rate, a compatibility scoring model was constructed to calculate the compatibility score value of the experimental gas and material sample used in each aging experiment. Step S6: Based on the compatibility score value, the compatibility level of the mixed gas with the material sample at the oxygen volume fraction was evaluated. Step S7: Based on the compatibility level, material replacement and oxygen volume fraction optimization measures to improve the lifespan of metal components were generated.

[0006] Furthermore, the experimental parameters include target air pressure, thermal aging temperature, and aging time.

[0007] Furthermore, the accelerated aging experimental system is constructed from a reaction vessel, a constant temperature heating device, a gas mixing system, and a sample rack; the aging experimental process includes: step S201, fixing the material sample on the sample rack, placing it in the reaction vessel, and ensuring good sealing; step S202, using a vacuum pump to evacuate the reaction vessel, and introducing a mixed gas with different oxygen volume fractions to the target pressure, wherein the mixed gas is... Mixed gas; Step S203: Start the constant temperature heating device to raise the temperature inside the reactor to the thermal aging temperature and keep the temperature constant; Step S204: When the aging experiment reaches the preset aging time, the experiment ends.

[0008] Furthermore, the material sample includes a metal material sample or an insulating material sample, wherein the metal material sample includes copper or aluminum, and the insulating material sample includes epoxy resin.

[0009] Further, step S3 includes: step S301, after each aging experiment, extracting a gas sample using a gas sampling valve; step S302, injecting the gas sample into a gas chromatograph to obtain the concentration of the key decomposition products after the aging experiment; step S303, obtaining the concentration change of the key decomposition products based on the concentration of the key decomposition products after the aging experiment; the key decomposition products include , , , and One or a combination thereof.

[0010] Further, step S4 includes: step S401, after each aging experiment, taking out the aged material sample and performing preliminary treatment on it; step S402, weighing the pre-treated material sample to obtain the mass of the aged material sample; step S403, calculating the mass change rate of the material sample based on the mass of the aged material sample and the mass of the material sample before the experiment; step S404, measuring the oxide layer thickness of the aged material sample by scanning electron microscopy on the cross section of the pre-treated material sample.

[0011] Furthermore, the mathematical expression of the compatibility scoring model is: ; In the formula, S is the compatibility score. , , The preset weight ratio coefficient, The preset safe upper limit for the concentration of major decomposition products. This is the preset maximum oxide layer thickness. This represents the change in the concentration of the main decomposition products. The thickness of the oxide layer, For the rate of change in quality, The difference between the mass of the material sample after aging and the mass of the material sample before the experiment. The mass of the material sample before the experiment.

[0012] Furthermore, step S6 includes: dividing the compatibility level into four levels based on the compatibility score, including: when When it is classified as excellent, it indicates excellent compatibility and a large security margin; when When it is in good condition, it is classified as good, indicating good compatibility and safe to use; when When it is classified as medium-level, it indicates that there is some risk and attention is required; when If it is, it is classified as poor, indicating poor compatibility and not recommended for use.

[0013] Furthermore, step S7 includes: based on the compatibility level, selecting the mixed gas with the oxygen volume fraction corresponding to the excellent compatibility level as the environmentally friendly gas and the corresponding material as the contact material of the power distribution switch.

[0014] Secondly, embodiments of the present invention provide a multi-parameter coupled evaluation system for the compatibility of environmentally friendly gas power distribution switchgear. The system employs the aforementioned multi-parameter coupled evaluation method for the compatibility of environmentally friendly gas power distribution switchgear. The evaluation system includes: an experimental control module, suitable for placing material samples in the experimental system, using N groups of mixed gases with varying oxygen volume fractions as experimental gases, and conducting thermal aging experiments under set experimental parameters; a concentration change calculation module, suitable for collecting aged experimental gas samples and performing component analysis after each experiment to obtain the corresponding concentration change of key decomposition products; and a surface damage quantification index acquisition module, suitable for obtaining the quantitative indicators of surface damage after each experiment. After aging experiments, the material samples are subjected to microscopic morphology observation and elemental composition analysis to extract quantitative indicators of surface damage, including oxide layer thickness and mass change rate. A compatibility scoring model construction module is used to construct a compatibility scoring model based on the concentration change, oxide layer thickness, and mass change rate, calculating the compatibility score value corresponding to the experimental gas and material sample used in each aging experiment. A compatibility level classification module is used to evaluate the compatibility level between the mixed gas and the material sample at the given oxygen volume fraction based on the compatibility score value. An optimization feedback module is used to generate material replacements and oxygen volume fraction optimization measures to improve the lifespan of metal components based on the compatibility level.

[0015] Thirdly, embodiments of the present invention also provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the above-described multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear.

[0016] Fourthly, embodiments of the present invention also provide a readable storage medium, which, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to execute the above-described multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear.

[0017] The advantages of this invention compared to the prior art are: (1) Filling the technological gap: Through multi-parameter coupled accelerated aging experiments and comprehensive evaluation models, the compatibility of environmentally friendly gases and internal metal / insulating materials of equipment under long-term aging conditions was quantitatively evaluated for the first time, which solved the problem that existing research only focuses on the short-term performance of gases and lacks the quantitative evaluation of the gas-material interaction law.

[0018] (2) Guiding engineering practice optimization: Based on the evaluation results, optimization strategies are proposed from the perspectives of material substitution and oxygen content of mixed gas. This can directly guide the material selection and structural optimization of equipment, ultimately significantly improving the operational reliability and actual service life of the equipment, forming a complete closed loop of technology application. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a flowchart of a multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear provided in Embodiment 1 of the present invention.

[0021] Figure 2 This is a flowchart of an aging experiment process provided in Embodiment 1 of the present invention.

[0022] Figure 3 This is a flowchart of a method for obtaining the concentration change of key decomposition products provided in Embodiment 1 of the present invention.

[0023] Figure 4 This is a flowchart of a method for obtaining quantitative indicators of material surface damage provided in Embodiment 1 of the present invention.

[0024] Figure 5 This is a schematic diagram of a multi-parameter coupling evaluation system for the compatibility of environmentally friendly gas power distribution switchgear provided in Embodiment 2 of the present invention.

[0025] Figure 6 This is a partial block diagram of the electronic device provided in Embodiment 3 of the present invention. Detailed Implementation

[0026] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0027] It should be understood that although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] Example 1

[0030] For ease of understanding, before detailing the specific solutions of this embodiment, the overall inventive concept of the present invention is described here: The present invention proposes a multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear, by constructing a method covering gas types (such as... An accelerated aging experimental system was developed, incorporating variables such as the mixture ratio, pressure, aging temperature, and time, to systematically investigate the long-term compatibility of environmentally friendly gases with typical electrical equipment metal materials (e.g., copper, aluminum) and insulating materials (e.g., epoxy resin). After aging, gas chromatography and infrared spectroscopy were used to analyze changes in the concentration of decomposition products. Scanning electron microscopy, energy dispersive spectroscopy, and XPS were used to characterize the oxide layer and mass changes on the material surface. A compatibility evaluation model was established, focusing on gas concentration changes, material surface damage indicators, and mass loss. Furthermore, optimization strategies based on material substitution and oxygen content in the mixed gas were proposed, achieving a closed-loop technology for multi-dimensional assessment of the operating status and lifespan extension of environmentally friendly gas-insulated equipment.

[0031] The specific implementation method is as follows: like Figure 1 The diagram shown is a flowchart of a multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear provided by the present invention.

[0032] As an example, the evaluation method includes: Step S1, constructing a gas-solid compatibility accelerated aging experimental system and setting experimental parameters; Step S2, placing the material sample in the experimental system, using N groups of mixed gases with different oxygen volume fractions as experimental gases, and conducting thermal aging experiments under the set experimental parameters; Step S3, after each experiment, collecting the aged experimental gas sample and performing composition analysis to obtain the concentration change of the corresponding key decomposition products; Step S4, after each experiment, observing the microstructure and analyzing the elemental composition of the material sample after the aging experiment, and extracting quantitative indicators of material surface damage, including oxide layer thickness and mass change rate; Step S5, constructing a compatibility scoring model based on the concentration change, oxide layer thickness, and mass change rate, and calculating the compatibility score value corresponding to the experimental gas and material sample used in each aging experiment; Step S6, evaluating the compatibility level between the mixed gas with the oxygen volume fraction and the material sample based on the compatibility score value; Step S7, generating material replacement and oxygen volume fraction optimization measures to improve the lifespan of metal components based on the compatibility level.

[0033] In some feasible implementations, the experimental parameters include target gas pressure, thermal aging temperature, and aging time. Preferably, the oxygen volume fractions of the N groups are set to 0%, 2%, 4%, 6%, 8%, and 10%. The target gas pressures are set to 0.1 MPa, 0.2 MPa, and 0.3 MPa. The thermal aging temperatures are set to 120℃, 170℃, and 220℃. The aging time is set to 40 hours. Three parallel samples are set for each group of conditions to ensure data reliability; the gas environment is kept stable during the experiment, and the consistency of gas pressure and temperature is monitored regularly to ensure the repeatability of the aging environment. It should be noted that the above experimental parameters are for illustrative purposes only and are not limiting; relevant technicians can modify their specific values ​​based on actual needs in practical applications.

[0034] In some feasible implementations, combined with Figure 2 As shown, the accelerated aging experimental system is constructed from a reaction vessel, a constant temperature heating device, a gas mixing system, and a sample rack. The aging experimental process includes: Step S201, fixing the material sample on the sample rack and placing it in the reaction vessel, ensuring good sealing; Step S202, using a vacuum pump to evacuate the reaction vessel, and introducing a mixed gas with different oxygen volume fractions to the target pressure, wherein the mixed gas is... Mixed gas; Step S203: Start the constant temperature heating device to raise the temperature inside the reactor to the thermal aging temperature and keep the temperature constant; Step S204: When the aging experiment reaches the preset aging time, the experiment ends.

[0035] Specifically, the detailed steps of the experiment include: Step 1: Experimental System Construction and Preparation: This is the foundation of the experiment, aiming to create a highly controllable "miniature laboratory." Core equipment includes: 1. Sealed Reactor: Select a stainless steel reactor capable of withstanding high temperature and pressure; the internal volume can be determined based on the number of samples. More specifically, the reactor must be equipped with: a heating mantle (for precise temperature control), temperature / pressure sensors, gas inlet and outlet valves, and a safety relief valve. 2. Gas Mixing System: Use a mass flow controller (MFC) to mix dry air with different oxygen volume fractions. The mixed gases (with oxygen volume fractions set to 0%, 2%, 4%, 6%, 8%, and 10%) are precisely mixed and charged into the reactor to the target pressure (0.1, 0.2, 0.3 MPa). 3. Sample holder: A chemically stable sample holder (such as ceramic or Teflon material) is designed inside the reactor to fix metal or insulating material samples, ensuring full contact between the samples and the gases without electrochemical interference.

[0036] Preferably, the material sample preparation process includes: Metal samples (copper, aluminum): cut into 30×30×1 mm sheets, polished, cleaned, and dried to remove surface oxides and oil stains, obtaining a uniform and clean initial surface. Insulating samples (epoxy resin): injection molded into 10 mm thick standard blocks, and similarly surface cleaned. All samples must be weighed using a precision balance before the experiment (recording the initial mass). And may perform initial surface morphology scanning electron microscopy (SEM) images as a comparison benchmark.

[0037] Step Two: Accelerated Aging Experiments include: 1. Sample Loading and Sealing: Fix the prepared sample on the sample holder, place it in the reaction vessel, and ensure a good seal. 2. Atmosphere Creation: Evacuate the reaction vessel using a vacuum pump, then introduce a pre-mixed environmentally friendly gas to the target pressure. 3. Aging Initiation: Start the heating device and raise the temperature inside the reaction vessel to the target value (120°C, 170°C, 220°C) at a certain heating rate (e.g., 5°C / min). Throughout the 40-hour aging process, the temperature control system must operate continuously, keeping temperature fluctuations within ±1°C. The pressure sensor continuously monitors the gas pressure to ensure no leaks. 4. Parallel Experiments: Each experimental condition (e.g., 4%)... Three identical sets of samples were used at 0.2 MPa and 170°C. This was to avoid random errors and ensure the reproducibility and statistical reliability of the experimental data. Subsequently, in the material analysis process, the average oxide layer thickness obtained from the three sets of samples was used as the final calculated oxide layer thickness. After the aging experiment is completed, turn off the heating and allow the reactor to cool naturally to room temperature. It should be noted that only one type of material is used for each aging experiment.

[0038] In some feasible implementations, combined with Figure 3 As shown, step S3 includes: step S301, after each aging experiment, extracting a gas sample using a gas sampling valve; step S302, injecting the gas sample into a gas chromatograph to obtain the concentration of the key decomposition products after the aging experiment; step S303, obtaining the concentration change of the key decomposition products based on the concentration of the key decomposition products after the aging experiment; the key decomposition products include , , , and One or a combination thereof.

[0039] Preferably, the data acquisition stage is divided into two lines: gas analysis and material analysis. Step S3 is the gas decomposition product analysis process, including: Sampling: A certain volume of aged gas is extracted using a gas-tight syringe or sampling bag through the sampling valve on the reaction vessel. Gas Chromatography (GC): The gas sample is injected into the gas chromatograph. GC can efficiently separate various components in the mixed gas, obtaining the composition of the mixed gas after the experiment. , , , and Based on this, the concentration of the gas mixture can be obtained. , , , and The concentration change is obtained by summing the concentration changes of each key decomposition product to get the concentration change of the main decomposition product. .

[0040] Preferably, a Fourier Transform Infrared Spectrometer (FTIR Spectrometer) can be used simultaneously to detect the decomposed components in order to verify the results obtained from chromatographic analysis (GC).

[0041] In some feasible implementations, combined with Figure 4As shown, step S4 includes: step S401, after each aging experiment, take out the aged material sample and perform preliminary treatment on it; step S402, weigh the pre-treated material sample to obtain the mass of the aged material sample; step S403, calculate the mass change rate of the material sample based on the mass of the aged material sample and the mass of the material sample before the experiment; step S404, measure the oxide layer thickness of the aged material sample by scanning electron microscopy on the cross section of the pre-treated material sample.

[0042] Preferably, step S4 is a material analysis process, including: sample removal and processing: carefully removing the aged sample, performing preliminary processing such as light cleaning (removing loose adhering substances), and then thoroughly drying. The oxide layer thickness of the aged material sample is obtained by measuring the cross-section of the pre-processed material sample using a scanning electron microscope. The mass (m) of the material sample after the experiment was measured again using the same precision balance, and compared with the mass of the material sample obtained from the initial weighing. Compare and calculate the rate of change in mass: .

[0043] In some feasible implementations, the mathematical expression of the compatibility scoring model is: ; In the formula, S is the compatibility score. , , The preset weight ratio coefficient, The preset safe upper limit for the concentration of major decomposition products. This is the preset maximum oxide layer thickness. This represents the change in the concentration of the main decomposition products. The thickness of the oxide layer, For the rate of change in quality, The difference between the mass of the material sample after aging and the mass of the material sample before the experiment. This refers to the mass of the material sample before the experiment. The preferred value is 100 ppm. The preferred value is 0.5 , , , That is, due to the normalization calculation above, the final S value takes values ​​in the interval [0, 1]. It should be noted that the preset values ​​of the above parameters are not restricted here, but are only for illustrative purposes. Relevant technicians can change the value settings based on actual needs in practical applications.

[0044] In some feasible implementations, step S6 includes: dividing the compatibility level into four levels according to the compatibility score, including: when When it is classified as excellent, it indicates excellent compatibility and a large security margin; when When it is in good condition, it is classified as good, indicating good compatibility and safe to use; when When it is classified as medium-level, it indicates that there is some risk and attention is required; when If it is, it is classified as poor, indicating poor compatibility and not recommended for use.

[0045] In some feasible implementations, step S7 includes: based on the compatibility level, selecting the mixed gas with the oxygen volume fraction corresponding to the excellent compatibility level as the environmentally friendly gas and the corresponding material as the contact material of the power distribution switch.

[0046] Preferably, the oxygen content and materials corresponding to the highest compatibility level obtained through multiple aging tests are selected as the preferred combination for subsequent practical applications. Specifically, as calculated through the above experiments: with 4% volume fraction Using a mixed gas as the experimental gas and copper as the material sample, under experimental parameters of a heating temperature of 120 °C, a target gas pressure of 0.1 MPa, and a heating time of 40 h, the obtained compatibility value S = 0.85 was the highest among all aging experiments. Therefore, in subsequent practical applications, under the same environmental parameters as the experimental parameters, 4% of the mixed gas is preferred. volume fraction The mixed gas is an environmentally friendly gas, and the contact material of the power distribution switch is a combination of copper.

[0047] In the above embodiments, by coupling the gas decomposition characteristics and material corrosion behavior within the same system for analysis, the complex scenario of gas-solid interaction inside the equipment is realistically simulated. This overcomes the limitations of existing research that only focuses on the insulation performance or short-term stability of the gas itself, making the evaluation results more comprehensive and closer to engineering practice. It can truly reveal the aging mechanism and failure mode inside environmentally friendly gas equipment, achieving a leap from "single analysis" to "system coupling" evaluation mode. Through a quantitative evaluation model with the changes in the concentration of major decomposition products, oxide layer thickness, and mass change rate as core indicators, and through normalized weighted calculation, a quantitative comprehensive compatibility score (S-value) is finally output. The originally vague, experience-dependent judgment of "good or bad compatibility" is transformed into a clear, comparable numerical indicator (between 0 and 1) and four levels (excellent, good, average, and poor). This eliminates the ambiguity of subjective judgment, providing precise data support and decision-making basis for material selection and operating condition selection, and establishing a scientific evaluation system from "subjective experience" to "objective quantification." The final output of this method is not only a score or level, but also naturally leads to specific and actionable lifespan improvement strategies. For example, a low score ("poor") can directly point to specific optimization directions such as "replacing materials" or "adjusting the oxygen volume ratio." This achieves a complete chain of "assessment-prediction-optimization," seamlessly connecting theoretical research with engineering applications. It guides equipment manufacturers in targeted design and material selection, helps operation and maintenance departments formulate precise maintenance strategies, and ultimately effectively improves the overall operational reliability of environmentally friendly gas equipment, forming a closed loop of technology application from "problem identification" to "problem solving." This methodology can be used to efficiently screen the compatibility combinations of different environmentally friendly gas formulations with various equipment materials. Through experiments, it can quickly determine which gas ratios, under what operating conditions, and with which materials can achieve an "excellent" score. This greatly reduces the cost of "trial and error," accelerates the R&D process of new environmentally friendly gases and equipment, provides key technical support and efficient R&D tools for promoting the green transformation of the power industry, and offers efficient R&D tools from "broad screening" to "precise optimization."

[0048] In summary, this invention, through its systematic experimental design, multi-dimensional detection methods, quantitative scoring model, and guiding optimization strategy, successfully addresses the pain point of lacking effective compatibility evaluation tools in the field of environmental gas equipment.

[0049] Example 2

[0050] Please see Figure 5 This embodiment provides a schematic diagram of a multi-parameter coupling evaluation system for the compatibility of environmentally friendly gas power distribution switchgear.

[0051] As an example, the system is implemented using the multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear described in Example 1. The evaluation system includes: The experimental control module 500 is suitable for placing material samples in the experimental system and using mixed gases with N oxygen volume fractions as experimental gases to conduct thermal aging experiments under set experimental parameters.

[0052] The concentration change calculation module 510 is suitable for collecting aged experimental gas samples and performing component analysis after each experiment to obtain the concentration change of the corresponding key decomposition products.

[0053] The surface damage quantification index acquisition module 520 is suitable for observing the microstructure and analyzing the elemental composition of material samples after aging experiments after each experiment, and extracting the quantitative index of surface damage of the material, including oxide layer thickness and mass change rate.

[0054] The compatibility scoring model construction module 530 is suitable for constructing a compatibility scoring model based on the concentration change, oxide layer thickness and mass change rate, and calculating the compatibility score value corresponding to the experimental gas and material sample used in each aging experiment.

[0055] The compatibility rating module 540 is suitable for evaluating the compatibility rating between the mixed gas at the oxygen volume fraction and the material sample based on the magnitude of the compatibility rating value.

[0056] The optimization feedback module 550 is suitable for generating material replacement and oxygen volume fraction optimization measures to improve the lifespan of metal components based on the compatibility level.

[0057] It is not difficult to see that this embodiment is a system implementation corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0058] It is worth mentioning that all modules involved in this embodiment are logical units. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by this invention; however, this does not mean that other units are absent from this embodiment.

[0059] Example 3

[0060] Please see Figure 6 The present invention also provides an electronic device, including: a memory and a processor; the memory stores at least one program instruction; the processor loads and executes the at least one program instruction to implement the multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear provided in Embodiment 1.

[0061] The memory 602 and processor 601 are connected via a bus, which may include any number of interconnecting buses and bridges, connecting various circuits of one or more processors 601 and memory 602 together. The bus may also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 601 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 601.

[0062] Processor 601 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 602 can be used to store data used by processor 601 during operation.

[0063] Example 4

[0064] This invention also proposes a storage medium storing a multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear. When executed by a processor, the multi-parameter coupling evaluation program for the compatibility of environmentally friendly gas power distribution switchgear implements the steps of the multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear as described above. Since this storage medium adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0065] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A multi-parameter coupled evaluation method for the compatibility of environmentally friendly gas power distribution switchgear, characterized in that, The evaluation methods include: Step S1: Build a gas-solid compatibility accelerated aging experimental system and set the experimental parameters; Step S2: Place the material sample in the experimental system, and use N groups of mixed gases with different oxygen volume fractions as experimental gases to conduct thermal aging experiments under the set experimental parameters. Step S3: After each experiment, collect the aged experimental gas sample and perform composition analysis to obtain the corresponding concentration change of the key decomposition products. Step S4: After each experiment, the microstructure of the material sample after the aging experiment is observed and the elemental composition is analyzed to extract the quantitative indicators of the material surface damage, including the oxide layer thickness and the mass change rate. Step S5: Based on the concentration change, oxide layer thickness and mass change rate, construct a compatibility scoring model and calculate the compatibility score value corresponding to the experimental gas and material sample used in each aging experiment. Step S6: Evaluate the compatibility level between the mixed gas at the oxygen volume fraction and the material sample based on the compatibility score value. Step S7: Based on the compatibility level, generate material replacements and oxygen volume fraction optimization measures to improve the lifespan of metal components.

2. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 1, characterized in that, The experimental parameters include target air pressure, thermal aging temperature, and aging time.

3. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 2, characterized in that, The accelerated aging experimental system is constructed from a reaction vessel, a constant temperature heating device, a gas mixing system, and a sample rack. The aging test process includes: Step S201: Fix the material sample on the sample holder, place it in the reaction vessel, and ensure good sealing; Step S202: Use a vacuum pump to evacuate the reactor, and introduce a mixed gas with different oxygen volume fractions to the target pressure. The mixed gas is... Mixed gas; Step S203: Start the constant temperature heating device to raise the temperature inside the reactor to the thermal aging temperature and keep the temperature constant. Step S204: When the aging experiment reaches the preset aging time, the experiment ends.

4. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 1, characterized in that, The material samples include metal material samples or insulating material samples. The metal material samples include copper or aluminum, and the insulating material samples include epoxy resin.

5. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 1, characterized in that, Step S3 includes: Step S301: After each aging test, use a gas sampling valve to extract a gas sample; Step S302: Inject the gas sample into a gas chromatograph to obtain the concentration of the key decomposition products after the aging experiment; Step S303: Obtain the concentration change of the key decomposition products based on the concentration of the key decomposition products after the aging experiment. The key decomposition products include , , , and One or a combination thereof.

6. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 1, characterized in that, Step S4 includes: Step S401: After each aging test, take out the aged material sample and perform preliminary treatment on it; Step S402: Weigh the pre-treated material sample to obtain the mass of the aged material sample; Step S403: Calculate the mass change rate of the material sample based on the mass of the material sample after aging and the mass of the material sample before the experiment; Step S404: The thickness of the oxide layer of the aged material sample is obtained by measuring the cross-section of the pre-treated material sample using a scanning electron microscope.

7. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 1, characterized in that, The mathematical expression for the compatibility scoring model is: ； In the formula, S is the compatibility score. , , The preset weight ratio coefficient, The preset safe upper limit for the concentration of major decomposition products. This is the preset maximum oxide layer thickness. This represents the change in the concentration of the main decomposition products. The thickness of the oxide layer, For the rate of change in quality, The difference between the mass of the material sample after aging and the mass of the material sample before the experiment. The mass of the material sample before the experiment.

8. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 7, characterized in that, Step S6 includes: dividing the compatibility level into four levels based on the compatibility score, including: when When it is classified as excellent, it indicates that it has excellent compatibility and a large security margin. when When this is the case, it is classified as a "good" level, indicating good compatibility and safe use. when At that time, it was classified as medium-level, indicating that there was some risk and attention was required; when If it is, it is classified as poor, indicating poor compatibility and not recommended for use.

9. The multi-parameter coupling evaluation method for the compatibility of environmentally friendly gas power distribution switchgear according to claim 8, characterized in that, Step S7 includes: Based on the compatibility level, the mixed gas with the oxygen volume fraction corresponding to the excellent compatibility level is selected as the environmentally friendly gas, and the corresponding material is selected as the contact material of the power distribution switch.

10. A multi-parameter coupled evaluation system for the compatibility of environmentally friendly gas power distribution switchgear, wherein the system is implemented using the multi-parameter coupled evaluation method for the compatibility of environmentally friendly gas power distribution switchgear as described in any one of claims 1-9, characterized in that... The evaluation system includes: The experimental control module is suitable for placing material samples in the experimental system and using N groups of mixed gases with different oxygen volume fractions as experimental gases to conduct thermal aging experiments under set experimental parameters. The concentration change calculation module is suitable for collecting aged experimental gas samples and performing component analysis after each experiment to obtain the concentration change of the corresponding key decomposition products. The module for obtaining quantitative indicators of surface damage is suitable for observing the microstructure and analyzing the elemental composition of material samples after aging experiments after each experiment, and extracting quantitative indicators of surface damage, including oxide layer thickness and mass change rate. The compatibility scoring model construction module is suitable for constructing a compatibility scoring model based on the concentration change, oxide layer thickness and mass change rate, and calculating the compatibility score value corresponding to the experimental gas and material sample used in each aging experiment. The compatibility rating module is suitable for evaluating the compatibility rating between the mixed gas at the oxygen volume fraction and the material sample based on the compatibility score value. The optimized feedback module is suitable for generating material replacements and oxygen volume fraction optimization measures to improve the lifespan of metal components based on the compatibility level.

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