Method for detecting mixing ratio of low-carbon GIS (Gas Insulated Switchgear) mixed gas

Abstract

The invention discloses a low-carbon GIS (Gas Insulated Switchgear) mixed gas mixing ratio detection method, relates to the technical field of gas detection, and solves the technical problem that the to-be-detected mixed gas possibly contacts with oxygen, so that oxygen exists in a gas cylinder, and the detection of the mixing ratio is not accurate enough. The method comprises the following steps: collecting GIS mixed gas, and transmitting the GIS mixed gas to a mixing ratio detection device; whether oxygen exists in the GIS mixed gas or not is analyzed based on a mixing ratio detection device, and if yes, the oxygen content in the GIS mixed gas is analyzed; if not, analyzing the mixing ratio of the GIS mixed gas; introducing the GIS mixed gas reaching the standard into a humidity detection module; analyzing the humidity of the GIS mixed gas by adopting a resistance-capacitance method; calling the conductivity analysis model to analyze the conductivity of the GIS mixed gas; adjusting the mixing ratio of the GIS mixed gas based on the conductivity; and the detection accuracy can be improved.

Description

Technical Field

[0001] The invention belongs to the field of gas detection, and relates to a gas mixture ratio detection technology, in particular to a low-carbon GIS mixed gas mixture ratio detection method. Background Art

[0002] GIS mixed gas refers to two or more gases mixed in a certain proportion and used as the insulating medium of GIS equipment to reduce greenhouse gas emissions and improve the environmental performance of the equipment; the mixed gas in GIS equipment, such as SF6 / N2 mixed gas, has an important influence on the insulation performance and isolation performance of the equipment; by detecting the mixing ratio, it can be ensured that the ratio of the mixed gas meets the equipment design requirements, thereby avoiding equipment failure or accidents caused by inappropriate mixing ratio; it helps to improve the reliability and safety of GIS equipment and ensure the stable operation of the power system; SF6 is a strong greenhouse gas. By detecting the mixing ratio of GIS mixed gas, the amount of SF6 gas can be accurately controlled, thereby reducing greenhouse gas emissions, helping to promote energy conservation and emission reduction of power grid equipment and promote green and low-carbon development.

[0003] The prior art (invention patent application with publication number CN116990447A) discloses a low-carbon GIS mixed gas detection system, which includes a mixing ratio detection module of SF6 / N2 mixed gas, a humidity detection module of SF6 / N2 mixed gas, a decomposition product detection module of the mixed gas, a purification and recovery module for detecting exhaust gas, and a central control module; the central control module controls the GIS mixed gas to enter the mixing ratio detection module of SF6 / N2 mixed gas, the humidity detection module of SF6 / N2 mixed gas, the decomposition product detection module of the mixed gas, the purification and recovery module for detecting exhaust gas, and the central control module through a control valve and a flow meter; the prior art detects the mixing ratio, humidity, and decomposition products of the GIS mixed gas, and purifies and recovers the exhaust gas; however, when detecting the mixing ratio of the GIS mixed gas, the mixed gas to be detected may come into contact with oxygen, resulting in a portion of oxygen existing in the gas cylinder, resulting in inaccurate detection of the mixing ratio.

[0004] The present invention provides a method for detecting the mixing ratio of a low-carbon GIS mixed gas to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a low-carbon GIS mixed gas mixing ratio detection method, which is used to solve the technical problem that when the mixing ratio of the GIS mixed gas is detected, the mixed gas to be detected may come into contact with oxygen, resulting in a part of oxygen existing in the gas cylinder, resulting in inaccurate detection of the mixing ratio.

[0006] To achieve the above object, the first aspect of the present invention provides a method for detecting the mixing ratio of a low-carbon GIS mixed gas, comprising:

[0007] Step S1: collecting GIS mixed gas through a gas cylinder and transmitting the GIS mixed gas to a mixing ratio detection device;

[0008] Step S2: Analyze whether there is oxygen in the GIS mixed gas based on the mixing ratio detection device. If yes, analyze the oxygen content in the GIS mixed gas; if no, analyze the mixing ratio of the GIS mixed gas;

[0009] Step S3: introducing the GIS mixed gas that meets the standard into the humidity detection module; analyzing the humidity of the GIS mixed gas by using the resistance-capacitance method;

[0010] Step S4: calling the conductivity analysis model to analyze the conductivity of the GIS mixed gas; adjusting the mixing ratio of the GIS mixed gas based on the conductivity.

[0011] Preferably, the mixing ratio detection device includes: an automatic flow controller, a micro-thermal conductivity sensor, a temperature sensor, a high-range electrochemical sensor, a control circuit board, a nickel-chromium heating wire, an outlet pipe 1, a low-range electrochemical sensor, and an outlet pipe 2.

[0012] Preferably, the analyzing whether oxygen exists in the GIS mixed gas based on the mixing ratio detection device comprises:

[0013] Retrieving a gas cylinder and connecting the gas cylinder to a mixing ratio detection device; heating the mixing ratio detection device by means of a nickel-chromium heating envelope wire; detecting the temperature inside the mixing ratio detection device by means of a temperature sensor, and when the temperature inside the mixing ratio detection device reaches a temperature threshold, controlling the temperature inside the mixing ratio detection device to maintain a constant temperature;

[0014] The GIS mixed gas in the gas cylinder is controlled by an automatic flow controller to enter the mixing ratio detection device, and the GIS mixed gas is detected by a high-range electrochemical sensor to determine whether the high-range electrochemical sensor detects an electrical signal; if yes, it is determined that there is oxygen in the GIS mixed gas; if not, the GIS mixed gas is detected by a low-range electrochemical sensor;

[0015] The control circuit controls the outlet pipe to be closed, so that the GIS mixed gas passes through the low-range electrochemical sensor to determine whether the low-range electrochemical sensor detects an electrical signal; if yes, it is determined that oxygen exists in the GIS mixed gas; if not, it is determined that no oxygen exists in the GIS mixed gas.

[0016] The present invention detects oxygen in a GIS mixed gas. A high-range electrochemical sensor is first used to detect oxygen in the mixed gas. When the high-range electrochemical sensor detects an electrical signal, the GIS mixed gas is discharged from an outlet pipe, thereby effectively avoiding damage to a low-range sensor due to excessively high oxygen content. When the high-range electrochemical sensor does not detect an electrical signal, a low-range electrochemical sensor is used to detect the GIS mixed gas, thereby effectively avoiding inaccurate detection by the high-range sensor due to excessively low O2 concentration.

[0017] Preferably, the analyzing the mixing ratio of the GIS mixed gas includes:

[0018] Obtaining a change value of the resistance value in the mixing ratio detection device, and generating a resistance value change function according to the change value of the resistance value and the oxygen content in the GIS mixed gas;

[0019] Obtain a resistance value change library, match the resistance value change function with the resistance value change library, and obtain the corresponding mixing ratio of the GIS mixed gas.

[0020] The present invention integrates the electrical signals detected by the high-range electrochemical sensor and the low-range electrochemical sensor to analyze the mixing ratio of the GIS mixed gas, which can avoid the problem of inaccurate detection results due to failure of a single sensor and is conducive to improving the accuracy of detection.

[0021] Preferably, the humidity of the GIS mixed gas is analyzed by the resistance-capacitance method, including:

[0022] The GIS mixed gas flows into the humidity detection device, and the sensor is used to absorb the water vapor in the humidity detection device, so that the humidity in the humidity detection device reaches a dynamic balance;

[0023] The resistance value or capacitance value in the humidity detection device is detected, and the humidity of the GIS mixed gas is calculated according to the set functional relationship.

[0024] It should be noted that polymers, humidity-sensitive capacitors, aluminum oxide films, etc. are used as sensor elements to absorb water vapor; electrical parameters such as capacitance, resistance, dielectric constant or frequency have a certain functional relationship with the water vapor content in the measured system.

[0025] The present invention uses the resistance-capacitance method to analyze the humidity of the GIS mixed gas. In the GIS mixed gas, water molecules penetrate and diffuse into the capacitor humidity-sensitive element, which will cause impedance changes. According to the functional relationship between the humidity and the resistance-capacitance value, the humidity of the GIS mixed gas can be accurately calculated; the invention has the characteristics of high measurement sensitivity and fast response speed.

[0026] Preferably, the calling of the conductivity analysis model to analyze the conductivity of the GIS mixed gas includes:

[0027] Retrieve the mixing ratio and humidity of the GIS mixed gas, and integrate the mixing ratio and humidity into a conductive input sequence;

[0028] The conductivity analysis model is called, and the conductivity input sequence is input into the conductivity analysis model to obtain the conductivity of the GIS mixed gas; wherein the conductivity analysis model is constructed based on the artificial intelligence model.

[0029] The present invention integrates the mixing ratio and humidity of the GIS mixed gas, and uses a trained conductive analysis model to analyze the conductivity of the GIS mixed gas. The conductivity of the GIS mixed gas can be comprehensively analyzed, which is beneficial to improving the accuracy of the analysis and provides a data basis for the subsequent adjustment of the mixing ratio of the GIS mixed gas.

[0030] Preferably, the conductive analysis model is constructed based on an artificial intelligence model, including:

[0031] Acquire a standard data set; wherein the standard data set includes standard input data consistent with the content attributes of the conductive input system, and standard output data consistent with the content attributes of the conductivity;

[0032] Divide the standard data set into a training set, a validation set, and a test set; use the training set to train the artificial intelligence model; use the validation set to adjust the parameters of the trained artificial intelligence model; use the test set to test the artificial intelligence model to obtain the performance parameters of the artificial intelligence model;

[0033] Determine whether the performance parameter of the artificial intelligence model is greater than the parameter threshold; if yes, mark the trained artificial intelligence model as a conductive analysis model; if no, retrain the artificial intelligence model.

[0034] It should be noted that the performance parameters include: accuracy, F1 score, recall rate and stability, and the parameter thresholds are set based on experience.

[0035] Preferably, the adjusting the mixing ratio of the GIS mixed gas based on the conductivity includes:

[0036] The conductivity of the GIS mixed gas is retrieved to determine whether the conductivity of the GIS mixed gas is less than the conductivity threshold; if yes, the mixing ratio of the GIS mixed gas is maintained; if no, the mixing ratio is adjusted according to the humidity of the GIS mixed gas;

[0037] The humidity of the GIS mixed gas is retrieved to obtain a humidity mixing library; the humidity of the GIS mixed gas is matched with the humidity mixing library to obtain a corresponding adjusted mixing ratio; and the mixing ratio of the GIS mixed gas is adjusted according to the adjusted mixing ratio.

[0038] The present invention determines whether the mixing ratio needs to be adjusted based on the conductivity of the GIS mixed gas. When the conductivity is not less than the conductivity threshold, the mixing ratio of the GIS mixed gas is adjusted according to the humidity of the GIS mixed gas, which can ensure that the conductivity of the GIS mixed gas is within the standard range, which is beneficial to maintaining the characteristics of the GIS equipment.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention collects GIS mixed gas through a gas cylinder, transmits the GIS mixed gas to a mixing ratio detection device, detects oxygen in the GIS mixed gas, first uses a high-range electrochemical sensor to detect oxygen in the mixed gas, and when the high-range electrochemical sensor detects an electrical signal, the GIS mixed gas is discharged from the gas outlet pipe, effectively avoiding damage to the low-range sensor due to excessively high oxygen content; when the high-range electrochemical sensor does not detect an electrical signal, the low-range electrochemical sensor is used to detect the GIS mixed gas, which can effectively avoid inaccurate detection of the high-range sensor due to too low O2 concentration; the electrical signals detected by the high-range electrochemical sensor and the low-range electrochemical sensor are integrated to analyze the mixing ratio of the GIS mixed gas, which can avoid the problem of inaccurate detection results due to failure of a single sensor, which is conducive to improving the accuracy of detection.

[0041] 2. The present invention uses the resistance-capacitance method to analyze the humidity of the GIS mixed gas. In the GIS mixed gas, the penetration and diffusion of water molecules into the capacitor humidity-sensitive element will cause impedance changes. According to the functional relationship between the humidity and the resistance-capacitance value, the humidity of the GIS mixed gas can be accurately calculated; it has the characteristics of high measurement sensitivity and fast response speed; the mixing ratio and humidity of the GIS mixed gas are integrated, and the conductivity of the GIS mixed gas is analyzed using a trained conductive analysis model, which can comprehensively analyze the conductivity of the GIS mixed gas, which is beneficial to improve the accuracy of the analysis and provide a data basis for the subsequent adjustment of the mixing ratio of the GIS mixed gas; whether the mixing ratio needs to be adjusted is analyzed according to the conductivity of the GIS mixed gas. When the conductivity is not less than the conductive threshold, the mixing ratio of the GIS mixed gas is adjusted according to the humidity of the GIS mixed gas, which can ensure that the conductivity of the GIS mixed gas is within the standard range, which is beneficial to maintain the characteristics of the GIS equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the steps of the overall scheme of the present invention;

[0044] Figure 2 is a schematic diagram of a mixing ratio detection device of the present invention;

[0045] Figure 3 Schematic diagram of the mixing ratio detection step of the present invention;

[0046] Figure 4 It is a schematic diagram of the steps of adjusting the mixing ratio of the mixed gas according to the present invention. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1 The first embodiment of the present invention provides a method for detecting the mixing ratio of a low-carbon GIS mixed gas, comprising:

[0049] Step S1: collecting GIS mixed gas through a gas cylinder and transmitting the GIS mixed gas to a mixing ratio detection device;

[0050] Step S2: Analyze whether there is oxygen in the GIS mixed gas based on the mixing ratio detection device. If yes, analyze the oxygen content in the GIS mixed gas; if no, analyze the mixing ratio of the GIS mixed gas;

[0051] Step S3: introducing the GIS mixed gas that meets the standard into the humidity detection module; analyzing the humidity of the GIS mixed gas by using the resistance-capacitance method;

[0052] Step S4: calling the conductivity analysis model to analyze the conductivity of the GIS mixed gas; adjusting the mixing ratio of the GIS mixed gas based on the conductivity.

[0053] See also Figure 2 The mixing ratio detection device includes: an automatic flow controller, a micro-thermal conductivity sensor, a temperature sensor, a high-range electrochemical sensor, a control circuit board, a nickel-chromium heating wire, an outlet pipe 1, a low-range electrochemical sensor, and an outlet pipe 2.

[0054] See also Figure 3, collect GIS mixed gas through gas cylinders, and transmit the GIS mixed gas to the mixing ratio detection device; call the gas cylinder, and connect the gas cylinder with the mixing ratio detection device; heat the mixing ratio detection device through the nickel-chromium heating envelope; use the temperature sensor to detect the temperature inside the mixing ratio detection device, and when the temperature inside the mixing ratio detection device reaches the temperature threshold, control the temperature inside the mixing ratio detection device to maintain a constant temperature;

[0055] An automatic flow controller is used to control the GIS mixed gas in the gas cylinder to enter the mixing ratio detection device, and the GIS mixed gas is detected by a high-range electrochemical sensor to determine whether the high-range electrochemical sensor detects an electrical signal; if yes, it is determined that oxygen exists in the GIS mixed gas; if no, the GIS mixed gas is detected by a low-range electrochemical sensor; the control circuit controls the gas outlet pipe to be closed, so that the GIS mixed gas passes through the low-range electrochemical sensor to determine whether the low-range electrochemical sensor detects an electrical signal; if yes, it is determined that oxygen exists in the GIS mixed gas; if no, it is determined that no oxygen exists in the GIS mixed gas.

[0056] For example: assuming that there are three bottles of GIS mixed gas collected, the mixing ratios of the three bottles of GIS mixed gas are detected by using a mixing ratio detection device; an electrical signal is detected when the mixed gas in gas cylinder 1 passes through the high-range electrochemical sensor; no electrical signal is detected when the mixed gas in gas cylinder 2 passes through the high-range electrochemical sensor, the gas outlet pipe is controlled to be closed, and an electrical signal is detected when the mixed gas in gas cylinder 2 passes through the low-range electrochemical sensor, indicating that both gas cylinder 1 and gas cylinder 2 contain oxygen; the oxygen content in gas cylinder 1 and gas cylinder 2 is analyzed; no electrical signal is detected when the GIS mixed gas in gas cylinder 3 passes through the high-range electrochemical sensor and the low-range electrochemical sensor, then gas cylinder 3 does not contain oxygen.

[0057] Obtaining a change value of the resistance value in the mixing ratio detection device, and generating a resistance value change function according to the change value of the resistance value and the oxygen content in the GIS mixed gas;

[0058] Obtain a resistance value change library, match the resistance value change function with the resistance value change library, and obtain the corresponding mixing ratio of the GIS mixed gas.

[0059] For example: suppose that the mixing ratio of the GIS mixed gas in gas cylinders 1 and 3 is analyzed, the oxygen content in gas cylinder 1 is retrieved, the ratio of the oxygen content to other gases is calculated based on the oxygen, the resistance value change function is generated based on the resistance value change value, the corresponding oxygen ratio is found in the resistance value change library, and the resistance value change function is matched to obtain the corresponding mixing ratio of oxygen 12%, gas A 36%, gas B 35%, and gas C 17%; the analysis steps of gas cylinder 2 are the same as those of gas cylinder 1;

[0060] The resistance change value in gas cylinder 3 is obtained, and a resistance change function is generated according to the resistance change value. A sequence with an oxygen content of 0 is found in the resistance change library, and the resistance change function is matched to obtain a mixing ratio in gas cylinder 3 of 34% for gas A, 42% for gas B, and 24% for gas C.

[0061] See also Figure 4 , let the GIS mixed gas flow into the humidity detection device, use the sensor to absorb the water vapor in the humidity detection device, so that the humidity in the humidity detection device reaches a dynamic balance; detect the resistance value or capacitance value in the humidity detection device, and calculate the humidity of the GIS mixed gas according to the set functional relationship;

[0062] The mixing ratio and humidity of the GIS mixed gas are retrieved, and the mixing ratio and humidity are integrated into a conductive input sequence. The conductive analysis model is called, and the conductive input sequence is input into the conductive analysis model to obtain the conductivity of the GIS mixed gas. The conductive analysis model is constructed based on an artificial intelligence model.

[0063] For example: suppose the gases in cylinders 1, 2 and 3 are put into the humidity detection device, the resistance value or capacitance value in the humidity detection device is detected, and the humidity of the GIS mixed gas is calculated according to the set function relationship; the humidity in cylinder 1 is 45%, the humidity in cylinder 2 is 34%, and the humidity in cylinder 3 is 45%;

[0064] The mixing ratio and humidity of the GIS mixed gas in gas cylinder 1, gas cylinder 2 and gas cylinder 3 are retrieved, and the mixing ratio and humidity are integrated into a conductive input sequence; the conductive analysis model is called, and the conductive input sequence is input into the conductive analysis model to obtain the conductivity of the GIS mixed gas in gas cylinder 1, gas cylinder 2 and gas cylinder 2.

[0065] Retrieve the conductivity of the GIS mixed gas to determine whether the conductivity of the GIS mixed gas is less than the conductivity threshold; if yes, maintain the mixing ratio of the GIS mixed gas; if no, adjust the mixing ratio according to the humidity of the GIS mixed gas; retrieve the humidity of the GIS mixed gas to obtain a humidity mixing library; match the humidity of the GIS mixed gas with the humidity mixing library to obtain the corresponding adjusted mixing ratio; adjust the mixing ratio of the GIS mixed gas according to the adjusted mixing ratio.

[0066] It should be noted that the conductivity threshold is set according to the performance requirements of the GIS equipment, and the conductivity threshold can be adjusted according to the actual use environment.

[0067] For example: assuming that the conductivity of existing gas cylinders 1, 2 and 3 is less than the conductivity threshold, and the conductivity of gas cylinder 1 is greater than the conductivity threshold, the humidity of gas cylinder 1 is retrieved to obtain the humidity mixing library; the humidity of the GIS mixed gas is matched with the humidity mixing library to obtain the corresponding adjusted mixing ratio of gas A accounting for 30%, gas B accounting for 40%, and gas C accounting for 30%; and the proportion of each gas can fluctuate up and down by 5%.

[0068] It is worth noting that the conductive analysis model is built based on an artificial intelligence model, including:

[0069] Acquire a standard data set; wherein the standard data set includes standard input data consistent with the content attributes of the conductive input system, and standard output data consistent with the content attributes of the conductivity;

[0070] Divide the standard data set into a training set, a validation set, and a test set; use the training set to train the artificial intelligence model; use the validation set to adjust the parameters of the trained artificial intelligence model; use the test set to test the artificial intelligence model to obtain the performance parameters of the artificial intelligence model;

[0071] Determine whether the performance parameter of the artificial intelligence model is greater than the parameter threshold; if yes, mark the trained artificial intelligence model as a conductive analysis model; if no, retrain the artificial intelligence model.

[0072] It should be noted that the performance parameters include: accuracy, F1 score, recall rate and stability, and the parameter thresholds are set based on experience.

[0073] The working principle of the present invention is as follows: the present invention collects GIS mixed gas through a gas cylinder and transmits the GIS mixed gas to a mixing ratio detection device; based on the mixing ratio detection device, analyzes whether there is oxygen in the GIS mixed gas, and if yes, analyzes the oxygen content in the GIS mixed gas; if not, analyzes the mixing ratio of the GIS mixed gas; introduces the GIS mixed gas that meets the standard into a humidity detection module; analyzes the humidity of the GIS mixed gas by a resistance-capacitance method; calls a conductive analysis model to analyze the conductivity of the GIS mixed gas; and adjusts the mixing ratio of the GIS mixed gas based on the conductivity.

[0074] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for detecting the mixing ratio of a low-carbon GIS mixed gas, characterized in that: include: Step S1: collecting GIS mixed gas through a gas cylinder and transmitting the GIS mixed gas to a mixing ratio detection device; Step S2: Analyze whether there is oxygen in the GIS mixed gas based on the mixing ratio detection device. If yes, analyze the oxygen content in the GIS mixed gas; if no, analyze the mixing ratio of the GIS mixed gas; Step S3: introducing the GIS mixed gas that meets the standard into the humidity detection module; analyzing the humidity of the GIS mixed gas by using the resistance-capacitance method; Step S4: calling the conductivity analysis model to analyze the conductivity of the GIS mixed gas; adjusting the mixing ratio of the GIS mixed gas based on the conductivity.

2. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 1, characterized in that: The mixing ratio detection device comprises: an automatic flow controller, a micro-thermal conductivity sensor, a temperature sensor, a high-range electrochemical sensor, a control circuit board, a nickel-chromium heating wire, a first air outlet pipe, a low-range electrochemical sensor, and a second air outlet pipe.

3. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 1, characterized in that: The method of analyzing whether oxygen exists in the GIS mixed gas based on the mixing ratio detection device includes: Retrieving a gas cylinder and connecting the gas cylinder to a mixing ratio detection device; heating the mixing ratio detection device by means of a nickel-chromium heating envelope wire; detecting the temperature inside the mixing ratio detection device by means of a temperature sensor, and when the temperature inside the mixing ratio detection device reaches a temperature threshold, controlling the temperature inside the mixing ratio detection device to maintain a constant temperature; The GIS mixed gas in the gas cylinder is controlled by an automatic flow controller to enter the mixing ratio detection device, and the GIS mixed gas is detected by a high-range electrochemical sensor to determine whether the high-range electrochemical sensor detects an electrical signal; if yes, it is determined that there is oxygen in the GIS mixed gas; if not, the GIS mixed gas is detected by a low-range electrochemical sensor; The control circuit controls the outlet pipe to be closed, so that the GIS mixed gas passes through the low-range electrochemical sensor to determine whether the low-range electrochemical sensor detects an electrical signal; if yes, it is determined that oxygen exists in the GIS mixed gas; if not, it is determined that no oxygen exists in the GIS mixed gas.

4. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 3, characterized in that: The analysis of the mixing ratio of the GIS mixed gas includes: Obtaining a change value of the resistance value in the mixing ratio detection device, and generating a resistance value change function according to the change value of the resistance value and the oxygen content in the GIS mixed gas; Obtain a resistance value change library, match the resistance value change function with the resistance value change library, and obtain the corresponding mixing ratio of the GIS mixed gas.

5. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 1, characterized in that: The method of using the resistance-capacitance method to analyze the humidity of the GIS mixed gas includes: The GIS mixed gas flows into the humidity detection device, and the sensor is used to absorb the water vapor in the humidity detection device, so that the humidity in the humidity detection device reaches a dynamic balance; The resistance value or capacitance value in the humidity detection device is detected, and the humidity of the GIS mixed gas is calculated according to the set functional relationship.

6. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 1, characterized in that: The calling of the conductivity analysis model to analyze the conductivity of the GIS mixed gas includes: Retrieve the mixing ratio and humidity of the GIS mixed gas, and integrate the mixing ratio and humidity into a conductive input sequence; The conductivity analysis model is called, and the conductivity input sequence is input into the conductivity analysis model to obtain the conductivity of the GIS mixed gas; wherein the conductivity analysis model is constructed based on the artificial intelligence model.

7. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 6, characterized in that: The conductive analysis model is constructed based on an artificial intelligence model and includes: Acquire a standard data set; wherein the standard data set includes standard input data consistent with the content attributes of the conductive input system, and standard output data consistent with the content attributes of the conductivity; Divide the standard data set into a training set, a validation set, and a test set; use the training set to train the artificial intelligence model; use the validation set to adjust the parameters of the trained artificial intelligence model; use the test set to test the artificial intelligence model to obtain the performance parameters of the artificial intelligence model; Determine whether the performance parameter of the artificial intelligence model is greater than the parameter threshold; if yes, mark the trained artificial intelligence model as a conductive analysis model; if no, retrain the artificial intelligence model.

8. A method for detecting the mixing ratio of a low-carbon GIS mixed gas according to claim 1, characterized in that: The adjusting the mixing ratio of the GIS mixed gas based on the conductivity includes: The conductivity of the GIS mixed gas is retrieved to determine whether the conductivity of the GIS mixed gas is less than the conductivity threshold; if yes, the mixing ratio of the GIS mixed gas is maintained; if no, the mixing ratio is adjusted according to the humidity of the GIS mixed gas; The humidity of the GIS mixed gas is retrieved to obtain a humidity mixing library; the humidity of the GIS mixed gas is matched with the humidity mixing library to obtain a corresponding adjusted mixing ratio; and the mixing ratio of the GIS mixed gas is adjusted according to the adjusted mixing ratio.

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