CN116660465A - Sulfur hexafluoride decomposition product complementary sensing array detection device and method - Google Patents
Sulfur hexafluoride decomposition product complementary sensing array detection device and method Download PDFInfo
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- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 21
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0034—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array comprising neural networks or related mathematical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/004—Specially adapted to detect a particular component for CO, CO2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0042—Specially adapted to detect a particular component for SO2, SO3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0044—Specially adapted to detect a particular component for H2S, sulfides
Abstract
The device comprises a single-hole type closed loop, wherein the single-hole type closed loop is connected with a sulfur hexafluoride gas storage chamber and has the functions of taking gas at normal pressure, rapidly detecting trace characteristic gas of the complementary sensing array and circularly recharging the detected gas; the device also comprises a vacuum auxiliary bypass and a self-calibration auxiliary bypass, and the device has the functions of self-calibration of the complementary sensing array signals and self-compensation of the pressure of the sulfur hexafluoride gas storage chamber through cooperation with a single-hole closed loop, so that the accuracy and the long-term stability of the detection device are improved. The device replaces the traditional chromatographic carrier gas sample injection with the rapid detection of the complementary sensing array, runs the processes of vacuumizing, cyclic detection recharging and self-calibration, and can realize the detection of the gas-insulated switchgear with full life cycle, microminiaturization, mass production, low power consumption and environmental friendliness.
Description
Technical Field
The invention belongs to the technical field of sulfur hexafluoride decomposition products, and particularly relates to a device and a method for detecting a sulfur hexafluoride decomposition product complementary sensing array.
Background
Sulfur hexafluoride is the preferred insulating medium for high voltage insulating devices in electrical power systems, and is widely used in high voltage Gas Insulated Switchgear (GIS) due to its excellent insulating and arc extinguishing properties. Defects are inevitably generated in the long-term operation of the GIS equipment, and abnormal discharge phenomena such as metal particle discharge, tip discharge and the like are caused. If the discharge faults cannot be detected in time, equipment breakdown is likely to occur, so that large-scale power failure is caused, and social order and life health safety of people are seriously threatened. What is needed is a health monitoring and fault diagnosis method for GIS full life cycle, wherein the characteristic that pure sulfur hexafluoride is easy to ionize and decompose under the action of electric arc provides important basis for diagnosis. The decomposition products react with oxygen and moisture in the equipment to generate substances such as sulfur dioxide, hydrogen sulfide, carbon monoxide and the like, and the fault type and the fault evaluation degree can be determined by detecting the concentration of the decomposition products and combining with a related intelligent algorithm.
At present, most of GIS equipment detection means are offline chromatographic analysis, so that full life cycle real-time detection cannot be realized, and accurate equipment defect searching is not facilitated. The chromatograph has the advantages of higher cost, higher power consumption, low complexity and reliability of detection auxiliary equipment, and complex detection process, and is unfavorable for batch detection and equipment field deployment. Long-term offline gas taking and chromatographic analysis cause equipment gas pressure reduction to influence the normal operation of GIS equipment, and meanwhile, decomposition products discharged in the detection process seriously influence the life health of operators, so that the novel concept of green low-carbon sustainable development is violated.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sulfur hexafluoride decomposition product complementary sensing array detection device and method, which realize full life cycle, large batch, miniaturization, low power consumption and environment-friendly detection.
The invention aims at realizing the following technical proposal, the sulfur hexafluoride decomposition product complementary sensing array detection device comprises,
a GIS air chamber;
the first manual valve is connected with the GIS air chamber to be manually opened and closed;
a single-hole closed loop configured to take gas at normal pressure, detect the detected gas, and circulate back to charge, the single-hole closed loop comprising,
a first electromagnetic valve, one end of which is connected with the first manual valve;
one end of the electronic pressure controller is connected with the other end of the first electromagnetic valve;
a complementary sensing array detection chamber connected to the other end of the electronic pressure controller, the complementary sensing array detection chamber comprising,
the complementary sensor array unit comprises a plurality of sensors for respectively detecting each single gas of the sulfur hexafluoride decomposition products;
a processing unit connected to the complementary sensor array units to decouple the complementary sensor array units from cross interference and identify the concentration of each single gas of the decomposition products;
a pressure gauge P1 provided between the complementary sensing array detection chamber and the electronic pressure controller to measure first pressure data;
one end of the second electromagnetic valve is connected with the other end of the complementary sensing array detection chamber;
one end of the booster pump is connected with the other end of the second electromagnetic valve;
one end of the one-way valve is connected with the other end of the booster pump;
one end of the third electromagnetic valve is connected with the other end of the one-way valve, and the other end of the third electromagnetic valve is connected between the first manual valve and one end of the first electromagnetic valve;
a pressure gauge P2 provided between the check valve and the third solenoid valve to measure second pressure data;
a vacuum auxiliary circuit, which comprises,
one end of the second manual valve is connected between the first manual valve and one end of the first electromagnetic valve;
a vacuum pump connected to the other end of the second manual valve;
a calibration auxiliary bypass, comprising,
one end of the fourth electromagnetic valve is connected between the electronic pressure controller and the first electromagnetic valve;
and the sulfur hexafluoride standard gas cylinder is connected with the other end of the fourth electromagnetic valve.
In the sulfur hexafluoride decomposition product complementary sensing array detection device, the complementary sensor array unit comprises three MEMS (micro electro mechanical systems) film compatible with noble metal doped metal oxide gas sensors for respectively detecting sulfur dioxide, hydrogen sulfide and carbon monoxide.
In the sulfur hexafluoride decomposition product complementary sensor array detection device, the complementary sensor array unit comprises four metal oxide gas sensors for respectively detecting sulfur dioxide, hydrogen sulfide, carbon monoxide and micro water.
In the sulfur hexafluoride decomposition product complementary sensing array detection device, the metal oxide gas sensor is compatible with noble metal doping based on MEMS films.
In the sulfur hexafluoride decomposition product complementary sensing array detection device, the precious metal doping design basis is to calculate electronic property composition complementary characteristics in each decomposition product based on density functional, and each decomposition product uniquely corresponds to the optimal sensor array unit.
In the sulfur hexafluoride decomposition product complementary sensing array detection device,
and constructing a data set of random target gas mixing response of each array unit, calculating the Kendell correlation coefficient of the response of each unit of the complementary array and the concentration of the gas component, and carrying out gas type identification training by combining a machine learning extremely random tree model to evaluate the selected array by using the feature score of the training model.
In the sulfur hexafluoride decomposition product complementary sensing array detection device,
the evaluation method comprises the following steps:
step 1), continuously collecting random concentration target gas mixing for 24 hours in the same time and space for response of each array unit, and cleaning abnormal data to obtain a response data set;
step 2) based on the response data set, respectively calculating Kendell correlation coefficients of each array unit and target gases of carbon monoxide, hydrogen sulfide and sulfur dioxide, wherein the array units can be evaluated to have complementary characteristics if the maximum Kendell coefficient exists for the only gas;
step 3) setting target gas type identifiers y in a data set, wherein y values are 0-7, which respectively correspond to eight combinations of three target gas types, carrying out target gas type classification training based on an extremely random tree model in combination with the evaluation result of step 2), separating each node based on a response threshold of an array unit, defining normalized feature scores by calculating the number of times each array unit appears in a decision tree and the reduction amount of classification unrepeacy, wherein the feature scores are higher and correspond to higher effectiveness of the array units, and constructing an optimal sensor array unit by integrating the evaluation result.
In the sulfur hexafluoride decomposition product complementary sensing array detection device, the processing unit comprises an embedded system carrying a lightweight convolutional neural network, the network inherits the convolutional neural network of the staggered group, and the concentration and the type of gas are decoupled by combining the multi-task joint loss.
In the sulfur hexafluoride decomposition product complementary sensing array detection device, the booster pump is a diaphragm pump to simultaneously realize the recharging of the detected gas and the vacuum preparation of the cyclic detection.
The detection method of the sulfur hexafluoride decomposition product complementary sensing array detection device comprises the following steps,
step 1), a first manual valve, a second manual valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a third electromagnetic valve are closed, the second manual valve and the first electromagnetic valve are opened, the electronic pressure controller is normally opened, the vacuum pump is opened, when the pressure gauge P1 reaches a first set value, the first electromagnetic valve is closed, the third electromagnetic valve is opened, the pressure gauge P2 reaches a second set value, the third electromagnetic valve is closed, and the second manual valve and the vacuum pump are closed;
step 2), opening a first manual valve and a first electromagnetic valve, setting the outlet of the electronic pressure controller to be normal pressure, and detecting the pressure meter P1 under normal pressure after the indication of the pressure meter P1 is stable;
step 3), after detection and analysis are completed, closing the first electromagnetic valve, opening the second electromagnetic valve and the third electromagnetic valve, reading the indication number of the pressure gauge P2, opening the booster pump, and pressurizing the gas of the complementary array detection chamber to fill the GIS gas chamber;
step 4), the pressure gauge P1 reaches a third set value, the booster pump is closed, and the first manual valve, the second manual valve and the first to fourth electromagnetic valves are closed;
and 5) when the device continuously detects, judging whether the pressure gauge P1 reaches a third set value, and repeating the steps 2) to 4) after the pressure gauge P1 reaches the third set value.
In the detection method, the third set value is larger than the first set value.
In the detection method, the first set value is 10mbar, and the third set value is 100mbar.
The self-calibration method of the sulfur hexafluoride decomposition product complementary sensing array detection device comprises the following steps,
step 1) when the device runs for the first time, the pressure gauge P1 reaches a first set value, the pressure gauge P2 reaches a second set value, and the first manual valve, the second manual valve, the first to fourth electromagnetic valves and devices are closed;
step 2) opening a fourth electromagnetic valve, enabling gas in the sulfur hexafluoride standard gas cylinder to enter a Shan Kongshi closed loop, setting the outlet of the electronic pressure controller to be normal pressure, and calibrating drift under normal pressure when the indication of the pressure gauge P1 is stable and the complementary sensing array detection chamber is normal pressure;
after the calibration is completed, the fourth electromagnetic valve is closed, the second electromagnetic valve, the third electromagnetic valve and the first manual valve are opened, the indication number of the pressure gauge P2 is recorded, the booster pump is opened, and the complementary array detection indoor gas is pressurized and enters the GIS air chamber;
step 4) closing the booster pump and all valves when the pressure gauge P1 meets a third set value;
step 5) if the indication number of the pressure gauge P2 is lower than the normal working value of the GIS air chamber, circularly calibrating the steps 2) to 4) until the normal working value of the GIS air chamber is reached;
in the self-calibration method, the cyclic self-calibration comprises zero drift calibration of an array detection signal and self-compensation of the GIS air chamber pressure.
In the self-calibration method, the third set value is ten times as large as the first set value.
Compared with the prior art, the invention has the following advantages: the complementary sensing array has the advantages of high detection speed, simplicity in operation, microminiaturization, low power consumption and high reliability. The circulating detection recharging replaces the traditional offline sampling detection device, the full life cycle monitoring of equipment can be realized, the detection efficiency is improved, the emission of sulfur hexafluoride and decomposition products thereof is greatly reduced, and the novel concept of green low-carbon sustainable development is responded. The self-calibration solves the problem of poor long-term stability of the metal oxide sensor, and the pure sulfur hexafluoride in the self-calibration process compensates the pressure of GIS equipment at the same time, so that zero emission in the whole detection period and the cooperation of the calibration of sensing signals and pressure compensation are realized.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is evident that the figures described below are only some embodiments of the invention, from which other figures can be obtained without inventive effort for a person skilled in the art. Also, like reference numerals are used to designate like parts throughout the figures.
In the drawings:
fig. 1 is a schematic structural diagram of a sulfur hexafluoride decomposition product complementary sensing array detection device according to an embodiment of the invention.
The invention is further explained below with reference to the drawings and examples.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will understand that a person may refer to the same component by different names. The description and claims do not identify differences in terms of components, but rather differences in terms of the functionality of the components. As used throughout the specification and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description hereinafter sets forth a preferred embodiment for practicing the invention, but is not intended to limit the scope of the invention, as the description proceeds with reference to the general principles of the description. The scope of the invention is defined by the appended claims.
For the purpose of facilitating an understanding of the embodiments of the present invention, reference will now be made to the drawings, by way of example, and specific examples of which are illustrated in the accompanying drawings.
For better understanding, in one embodiment, as shown in fig. 1, a sulfur hexafluoride decomposition product complementary sensor array detection device includes,
a GIS air chamber 1;
the first manual valve 2 is connected with the GIS air chamber 1 to be manually opened and closed;
a single-hole closed loop configured to take gas at normal pressure, detect the detected gas, and circulate back to charge, the single-hole closed loop comprising,
a first electromagnetic valve 3, one end of which is connected to the first manual valve 2;
an electronic pressure controller 4, one end of which is connected with the other end of the first electromagnetic valve 3;
a complementary sensing array detection chamber 6 connected to the other end of the electronic pressure controller 4, the complementary sensing array detection chamber 6 comprising,
the complementary sensor array unit comprises a plurality of sensors for respectively detecting each single gas of the sulfur hexafluoride decomposition products;
a processing unit connected to the complementary sensor array units to decouple the complementary sensor array units from cross interference and identify the concentration of each single gas of the decomposition products;
a pressure gauge P1 5 provided between the complementary sensor array detection chamber 6 and the electronic pressure controller 4 to measure first pressure data;
a second electromagnetic valve 7, one end of which is connected with the other end of the complementary sensor array detection chamber 6;
a booster pump 8, one end of which is connected to the other end of the second electromagnetic valve 7;
a check valve 9, one end of which is connected to the other end of the booster pump 8;
a third electromagnetic valve 11, one end of which is connected to the other end of the check valve 9, and the other end of which is connected between the first manual valve 2 and one end of the first electromagnetic valve 3;
a pressure gauge P2 10 provided between the check valve 9 and the third solenoid valve 11 to measure second pressure data;
a vacuum auxiliary circuit, which comprises,
a second manual valve 12 having one end connected between the first manual valve 2 and one end of the first electromagnetic valve 3;
a vacuum pump 13 connected to the other end of the second manual valve 12;
a calibration auxiliary bypass, comprising,
a fourth solenoid valve 14 having one end connected between the electronic pressure controller 4 and the first solenoid valve 3;
and the sulfur hexafluoride standard gas cylinder 15 is connected with the other end of the fourth electromagnetic valve 14.
In a preferred embodiment of the sulfur hexafluoride decomposition product complementary sensor array detection device, the complementary sensor array unit includes four metal oxide gas sensors for respectively detecting sulfur dioxide, hydrogen sulfide, carbon monoxide and micro water.
In a preferred embodiment of the sulfur hexafluoride decomposition product complementary sensing array detection device, the metal oxide gas sensor is based on MEMS thin film compatibility and noble metal doping.
In the preferred embodiment of the sulfur hexafluoride decomposition product complementary sensor array detection device, the noble metal doping design basis is to calculate the electronic property composition complementary characteristic in each decomposition product based on the density functional, and each decomposition product uniquely corresponds to the optimal sensor array unit.
In the preferred embodiment of the sulfur hexafluoride decomposition product complementary sensing array detection device, the optimal sensing array unit needs to be further evaluated, a random target gas mixing response data set of each unit is generated, the Kendell correlation coefficient of each unit and the characteristic score of a machine learning limit random tree are calculated, and the complementary array is constructed by comprehensively evaluating the two times. And calculating the Kendell correlation coefficient of each unit response of the complementary array and the concentration of the gas component, evaluating the complementarity and the consistency by using the Kendell correlation coefficient, and performing gas type identification training by combining a machine learning extremely random tree model, and evaluating the effectiveness of the selected array by using the feature score of the training model.
The complementary array evaluation includes the steps of,
step 1), continuously collecting random concentration target gas mixing for 24 hours in the same time and space for response of each array unit, and cleaning abnormal data to obtain a response data set;
step 2) based on a response data set, respectively calculating Kendell correlation coefficients of each array unit and target gases of carbon monoxide, hydrogen sulfide and sulfur dioxide, wherein the same type of sensor has smaller difference on the Kendell coefficients of the target gases, so that the MEMS film compatible preparation array unit can be estimated to have higher consistency, the different types of sensors have larger difference on the Kendell coefficients of the target gases, and meanwhile, the sensor has the largest Kendell coefficient on the only gas, so that the array unit can be estimated to have complementary characteristics;
and 3) adding target gas type identifiers y in the data set, wherein y values are 0-7, which respectively correspond to eight combinations of three target gas types, carrying out target gas type classification training based on an extremely random tree model in combination with the evaluation result of the step 2), separating each node based on a response threshold of each array unit, defining normalized feature scores by calculating the number of times each array unit appears in a decision tree and the reduction amount of classification unrepeacy, wherein the feature scores are higher and correspond to higher effectiveness of the array units, and constructing an optimal complementary array in combination with the evaluation result.
In a preferred embodiment of the sulfur hexafluoride decomposition product complementary sensing array detection device, the processing unit includes an embedded system carrying a lightweight convolutional neural network that inherits the staggered set convolutional neural network and combines the multitasking joint loss decoupling gas concentration and species.
In the preferred embodiment of the sulfur hexafluoride decomposition product complementary sensing array detection device, the booster pump 8 is a diaphragm pump to simultaneously implement the recharging of the detected gas and the cyclic detection vacuum preparation.
In one embodiment, the complementary sensor array unit is composed of four metal oxide gas sensors based on film compatibility and noble metal doping, and the present embodiment is directed to sulfur hexafluoride decomposition products of hydrogen sulfide, sulfur dioxide and carbon monoxide, but the complementary array construction method is not limited thereto, and can be extended to more MEMS film compatible sensor arrays. The core is the implementation of the complementary characteristics, and although the metal oxidation sensor is not a specific sensor, the array unit with high selectivity can be designed for each single gas, and the identification of the mixed gas can be realized by fully utilizing the cross sensitivity characteristics of the array unit. The specific design thought comprises: calculating the adsorption energy, adsorption distance and charge transfer property of the gas-sensitive unit to the target gas based on the density functional, and designing a complementary array; the MEMS micro-nano processing technology is combined to manufacture a complementary gas sensor; the sensing array units are further evaluated, a random target gas mixing response data set of each unit is generated, the Kendell correlation coefficient of each unit and the characteristic score of a machine learning limit random tree are calculated, and a complementary array is constructed by comprehensively evaluating the two times; the intelligent sensing algorithm is integrated by an array, a lightweight convolutional neural network is carried by an embedded system, the network is obtained by a staggered group convolutional neural network through a knowledge distillation technology, the sensor array cross interference realizes automatic data fusion by training a staggered group convolutional kernel, and the gas concentration and the type collaborative decoupling are realized by a multi-task joint loss mechanism, so that the concentration identification of sulfur hexafluoride and decomposition products thereof is realized.
In summary, the sulfur hexafluoride decomposition product complementary sensing array detection device can realize the rapid detection of sulfur hexafluoride and the decomposition products thereof based on the film compatible metal oxide sensor of the complementary sensing array, and can replace the existing offline chromatographic gas taking detection device. The invention has the advantages of high detection speed, simple operation, microminiaturization, low power consumption and high reliability. The cyclic detection recharging device can realize the full life cycle monitoring of equipment, improves the detection efficiency, greatly reduces the emission of sulfur hexafluoride and decomposition products thereof, and responds to a new concept of green low-carbon sustainable development. The self-calibration device solves the problem of poor long-term stability of the metal oxide sensor, and the pure sulfur hexafluoride in the self-calibration process compensates the pressure of GIS equipment at the same time, so that zero emission in the whole detection period and the cooperation of the calibration of sensing signals and pressure compensation are realized.
In one embodiment, self-calibration is accomplished simultaneously with the calibration function of the sensing signals of the complementary sensing array detection chamber 6 and the pressure compensation function of the GIS gas chamber 1.
In one embodiment, the vacuum pumping and the cyclic detection recharging pressure gauge P1 5 are different in set vacuum degree, and the booster pump 8 used for recharging the detected gas is a diaphragm pump, so that the preparation of the detected gas recharging and the cyclic detection vacuum is realized. The vacuumizing and the cyclic detection recharging are different in detection objects of the pressure gauge P2, the vacuumizing is used for detecting the pressure of the closed loop, and the cyclic detection recharging is used for detecting the pressure of the sulfur hexafluoride gas storage chamber.
In one embodiment, the sulfur hexafluoride decomposition product complementary sensing array detection device comprises a single-hole closed loop and two auxiliary bypasses, and the sulfur hexafluoride decomposition product complementary sensing array detection device comprises a first electromagnetic valve 3, an electronic pressure controller 4, a pressure gauge P1 5, a complementary sensing array detection chamber 6, a second electromagnetic valve 7, a booster pump 8, a one-way valve 9, a pressure gauge P2 10 and a third electromagnetic valve 11 in sequence; the vacuum auxiliary loop consists of a second manual valve 12 and a vacuum pump 13 in sequence; the calibration auxiliary bypass consists of a fourth electromagnetic valve 14 and a sulfur hexafluoride standard gas cylinder 15 in sequence; the single-hole closed loop is connected with the GIS air chamber 1 through the first manual valve 2, the single-hole closed loop and the vacuum auxiliary bypass are connected to the point A, and the calibration auxiliary bypass and the single-hole closed loop are connected to the point B.
The detection method of the sulfur hexafluoride decomposition product complementary sensing array detection device comprises the following steps,
step 1), the first manual valve 2, the second manual valve 12 and the first to fourth electromagnetic valves 14 are closed, the second manual valve 12 and the first electromagnetic valve 3 are opened, the electronic pressure controller 4 is normally opened, the vacuum pump 13 is opened, when the pressure gauge P1 5 reaches a first set value, the first electromagnetic valve 3 is closed, the third electromagnetic valve 11 is opened, the pressure gauge P2 10 reaches a second set value, the third electromagnetic valve 11 is closed, and the second manual valve 12 and the vacuum pump 13 are closed;
step 2), opening the first manual valve 2 and the first electromagnetic valve 3, setting the outlet of the electronic pressure controller 4 to be normal pressure, and detecting the complementary sensing array detection chamber 6 under normal pressure after the indication of the pressure gauge P1 5 is stable;
step 3), after detection analysis is completed, the first electromagnetic valve 3 is closed, the second electromagnetic valve 7 and the third electromagnetic valve 11 are opened, the indication of the pressure gauge P2 10 is read, the booster pump 8 is opened, and the gas in the complementary array detection chamber is pressurized and filled into the GIS gas chamber 1;
step 4), the pressure gauge P1 5 reaches a first set value, the booster pump 8 is closed, and the first manual valve 2, the second manual valve 12 and the first to fourth electromagnetic valves 14 are closed;
step 5), when the device continuously detects, judging whether the pressure gauge P1 5 reaches a third set value, and repeating the steps 2-4 until the output of the complementary sensing array is stable after the pressure gauge P1 5 reaches the third set value; and if the third set value is not reached, executing the step 1.
In a preferred embodiment of the detection method, the third set value is greater than the first set value.
In a preferred embodiment of the detection method, the first set point is 10mbar and the third set point is 100mbar. The first set value of 10mbar is a set requirement in the first detection, and is the condition that the influence of impurity gas in an initial loop on the operation of GIS equipment is considered to be minimum, if the impurity gas such as water molecules enters a GIS air chamber from the loop, serious consequences are caused; the third set value of 100mbar is a set requirement in continuous detection, and the method considers the residual target gas in the last detection and simultaneously considers the complexity of the gas path structure and the detection efficiency on the premise of not affecting the detection precision of the time, thereby improving the utilization rate of the diaphragm pump.
In one embodiment, evacuating comprises the steps of:
1) Before the device runs for the first time, the loop should meet higher vacuum degree to reduce the interference of ambient gas, and all manual valves and electromagnetic valves are closed;
2) The second manual valve 12 and the first electromagnetic valve 3 are opened, the electronic pressure controller 4 is opened normally, and the vacuum pump 13 is opened;
3) The pressure gauge P1 5 reaches a first set value, such as 10mbar absolute, closes the first solenoid valve 3 and opens the third solenoid valve 11;
4) The pressure gauge P2 reaches a second set value, such as 10mbar absolute, the third solenoid valve 11 is closed, the second manual valve 12 is closed, and the vacuum pump 13 is closed;
in one embodiment, the detecting recharging includes the steps of:
1) When the device is operated for the first time, judging that the pressure gauge P1 5 and the pressure gauge P2 10 reach a first set value and a second set value respectively, for example, the absolute pressure is 10mbar, and closing all valves and devices;
2) Opening the first manual valve 2, the first electromagnetic valve 3, setting the outlet of the electronic pressure controller 4 to be normal pressure, stabilizing the indication of the pressure gauge P1 5, and detecting the complementary sensing array detection chamber 6 under normal pressure;
3) After detection analysis is completed, the first electromagnetic valve 3 is closed, the third electromagnetic valve 11 and the second electromagnetic valve 7 are opened, the reading of the indication number of the pressure gauge P2 10 is read, the booster pump 8 is opened, and the gas in the complementary array detection chamber 6 is pressurized and filled into the GIS gas chamber 1;
4) The pressure gauge P1 5 reaches a third set point, such as 100mbar absolute, the booster pump 8 is closed, all valves are closed;
5) When the device continuously detects, whether the pressure gauge P1 5 reaches a third set value, such as the absolute pressure of 100mbar, is judged, and the steps of detecting and recharging are repeated.
The self-calibration method of the sulfur hexafluoride decomposition product complementary sensing array detection device comprises the following steps,
step 1) when the device operates for the first time, the pressure gauge P1 5 reaches a first set value and the pressure gauge P2 reaches a second set value, and the first manual valve 2, the second manual valve 12, the first to fourth electromagnetic valves 14 and devices are closed;
step 2), the fourth electromagnetic valve 14 is opened, gas in the sulfur hexafluoride standard gas cylinder 15 enters a Shan Kongshi closed loop, the outlet of the electronic pressure controller 4 is set to be normal pressure, and when the indication of the pressure gauge P1 5 is stable, the complementary sensing array detection chamber 6 is calibrated and drifted under normal pressure;
after the calibration is completed, the fourth electromagnetic valve 14 is closed, the second electromagnetic valve 7, the third electromagnetic valve 11 and the first manual valve 2 are opened, the indication of the pressure gauge P2 10 is recorded, the booster pump 8 is opened, and the complementary array detection indoor gas is pressurized and enters the GIS air chamber 1;
step 4) until the pressure gauge P1 5 meets a third set value, closing the booster pump 8 and all valves, and if P1 5 does not meet the third set value, checking the loop sealing problem;
step 5) if the indication number of the pressure gauge P2 10 is lower than the normal working value of the GIS air chamber 1, circularly calibrating the steps 2) to 4) until the normal working value of the GIS air chamber 1 is reached;
in a preferred embodiment of the self-calibration method, the third set point is ten times the first set point. The first set value of 10mbar is a set requirement in the first detection, and is the condition that the influence of impurity gas in an initial loop on the operation of GIS equipment is considered to be minimum, if the impurity gas such as water molecules enters a GIS air chamber from the loop, serious consequences are caused; the third set value of 100mbar is a set requirement in continuous detection, and the method considers the residual target gas in the last detection and simultaneously considers the complexity of the gas path structure and the detection efficiency on the premise of not affecting the detection precision of the time, thereby improving the utilization rate of the diaphragm pump.
In one embodiment, self-calibration includes the steps of:
1) When the device is operated for the first time, the pressure gauge P1 5 and the pressure gauge P2 10 reach a first set value and a second set value (the absolute pressure is 10 mbar), and all valves and devices are closed;
2) The fourth electromagnetic valve 14 is opened, gas in the sulfur hexafluoride standard gas bottle 15 enters the loop, the outlet of the electronic pressure controller 4 is set to be normal pressure, and when the indication of the pressure gauge P1 5 is stable, the complementary sensing array detection chamber 6 is calibrated to drift under normal pressure;
3) After calibration is completed, the fourth electromagnetic valve 14 is closed, the second electromagnetic valve 7, the third electromagnetic valve 11 and the first manual valve 2 are opened, the pressure gauge P2 10 is recorded, the booster pump 8 is opened, and the gas in the complementary array detection chamber 6 is pressurized to enter the GIS gas chamber 1;
4) The pressure gauge P1 5 meets the requirement of 100mbar absolute pressure, the booster pump 8 is closed, and all valves are closed;
5) If the indication number of the pressure gauge P2 10 is lower than the normal working value of the GIS equipment, the self-calibration steps 2-4) are circulated until the normal working pressure is reached;
although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described specific embodiments and application fields, and the above-described specific embodiments are merely illustrative, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous forms of the invention without departing from the scope of the invention as claimed.
Claims (10)
1. A sulfur hexafluoride decomposition product complementary sensing array detection device is characterized in that the device comprises,
a GIS air chamber;
the first manual valve is connected with the GIS air chamber to be manually opened and closed;
a single-hole closed loop configured to take gas at normal pressure, detect the detected gas, and circulate back to charge, the single-hole closed loop comprising,
a first electromagnetic valve, one end of which is connected with the first manual valve;
one end of the electronic pressure controller is connected with the other end of the first electromagnetic valve;
a complementary sensing array detection chamber connected to the other end of the electronic pressure controller, the complementary sensing array detection chamber comprising,
the complementary sensor array unit comprises a plurality of sensors for respectively detecting each single gas of the sulfur hexafluoride decomposition products;
a processing unit connected to the complementary sensor array units to decouple the complementary sensor array units from cross interference and identify the concentration of each single gas of the decomposition products;
a pressure gauge P1 provided between the complementary sensing array detection chamber and the electronic pressure controller to measure first pressure data;
one end of the second electromagnetic valve is connected with the other end of the complementary sensing array detection chamber;
one end of the booster pump is connected with the other end of the second electromagnetic valve;
one end of the one-way valve is connected with the other end of the booster pump;
one end of the third electromagnetic valve is connected with the other end of the one-way valve, and the other end of the third electromagnetic valve is connected between the first manual valve and one end of the first electromagnetic valve;
a pressure gauge P2 provided between the check valve and the third solenoid valve to measure second pressure data;
a vacuum auxiliary circuit, which comprises,
one end of the second manual valve is connected between the first manual valve and one end of the first electromagnetic valve;
a vacuum pump connected to the other end of the second manual valve;
a calibration auxiliary bypass, comprising,
one end of the fourth electromagnetic valve is connected between the electronic pressure controller and the first electromagnetic valve;
and the sulfur hexafluoride standard gas cylinder is connected with the other end of the fourth electromagnetic valve.
2. The sulfur hexafluoride decomposition product complementary sensor array detection apparatus of claim 1, wherein preferably the complementary sensor array unit includes three MEMS thin film compatible and noble metal doped metal oxide gas sensors for respectively detecting sulfur dioxide, hydrogen sulfide and carbon monoxide.
3. The sulfur hexafluoride decomposition product complementary sensing array detection apparatus of claim 2, wherein said noble metal doping calculates an electronic property composition complementary characteristic in each decomposition product based on a density functional, each decomposition product uniquely corresponding to an optimal sensor array unit.
4. The sulfur hexafluoride decomposition product complementary sensing array detection apparatus according to claim 3, wherein said optimal sensing array unit is further evaluated for target gas concentration and species sensitivity, a data set of random target gas mixing responses of each array unit is constructed, a coefficient of kendel correlation of each unit response of the complementary array and gas component concentration is calculated, and a machine learning extremely random tree model is combined for gas species identification training, and the selected array is evaluated for the optimal sensing array unit with a feature score of the training model.
5. The sulfur hexafluoride decomposition product complementary sensing array detection apparatus of claim 1, wherein said processing unit includes an embedded system carrying a lightweight convolutional neural network that inherits interleaved sets of convolutional neural networks, and combines a multi-tasking joint loss decoupling gas concentration and species.
6. The sulfur hexafluoride decomposition product complementary sensing array detection device of claim 1, wherein said booster pump is a diaphragm pump to simultaneously implement the recharging of the gas under test and the cyclic detection vacuum preparation.
7. The method for detecting a sulfur hexafluoride decomposition product complementary sensor array detector according to any one of claims 1-6, including the steps of,
step 1), a first manual valve, a second manual valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a third electromagnetic valve are closed, the second manual valve and the first electromagnetic valve are opened, the electronic pressure controller is normally opened, the vacuum pump is opened, when the pressure gauge P1 reaches a first set value, the first electromagnetic valve is closed, the third electromagnetic valve is opened, the pressure gauge P2 reaches a second set value, the third electromagnetic valve is closed, and the second manual valve and the vacuum pump are closed;
step 2), opening a first manual valve and a first electromagnetic valve, setting the outlet of the electronic pressure controller to be normal pressure, and detecting the pressure meter P1 under normal pressure after the indication of the pressure meter P1 is stable;
step 3), after detection and analysis are completed, closing the first electromagnetic valve, opening the second electromagnetic valve and the third electromagnetic valve, reading the indication number of the pressure gauge P2, opening the booster pump, and pressurizing the gas of the complementary array detection chamber to fill the GIS gas chamber;
step 4), the pressure gauge P1 reaches a third set value, the booster pump is closed, and the first manual valve, the second manual valve and the first to fourth electromagnetic valves are closed;
and 5) when the device continuously detects, judging whether the pressure gauge P1 reaches a third set value, and repeating the steps 2) to 4) after the pressure gauge P1 reaches the third set value.
8. The method of claim 7, wherein the third set point is greater than the first set point, the first set point is 10mbar, and the third set point is 100mbar.
9. The method for self-calibrating a sulfur hexafluoride decomposition product complementary sensor array detector apparatus of claim 1, including the steps of,
step 1) when the device runs for the first time, the pressure gauge P1 reaches a first set value, the pressure gauge P2 reaches a second set value, and the first manual valve, the second manual valve, the first to fourth electromagnetic valves and devices are closed;
step 2) opening a fourth electromagnetic valve, enabling gas in the sulfur hexafluoride standard gas cylinder to enter a Shan Kongshi closed loop, setting the outlet of the electronic pressure controller to be normal pressure, and calibrating drift under normal pressure when the indication of the pressure gauge P1 is stable and the complementary sensing array detection chamber is normal pressure;
after the calibration is completed, the fourth electromagnetic valve is closed, the second electromagnetic valve, the third electromagnetic valve and the first manual valve are opened, the indication number of the pressure gauge P2 is recorded, the booster pump is opened, and the complementary array detection indoor gas is pressurized and enters the GIS air chamber;
step 4) closing the booster pump and all valves when the pressure gauge P1 meets a third set value;
and 5) if the indication number of the pressure gauge P2 is lower than the normal working value of the GIS air chamber, circularly calibrating the steps 2) to 4) until the normal working value of the GIS air chamber is reached.
10. The method of self-calibration according to claim 9, wherein the cyclic self-calibration includes zero drift calibration of the array detection signal and GIS gas cell pressure self-compensation.
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| CN116989855B (en) * | 2023-09-27 | 2023-12-08 | 国网江苏省电力有限公司电力科学研究院 | Gas state multi-parameter detection sensor and self-calibration method thereof |
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