CN113820452A - Method, device and system for evaluating insulation degradation gas of switch cabinet - Google Patents
Method, device and system for evaluating insulation degradation gas of switch cabinet Download PDFInfo
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- CN113820452A CN113820452A CN202110947393.7A CN202110947393A CN113820452A CN 113820452 A CN113820452 A CN 113820452A CN 202110947393 A CN202110947393 A CN 202110947393A CN 113820452 A CN113820452 A CN 113820452A
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- 238000009413 insulation Methods 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims description 36
- 238000006731 degradation reaction Methods 0.000 title abstract description 32
- 230000015556 catabolic process Effects 0.000 title abstract description 31
- 230000006866 deterioration Effects 0.000 claims abstract description 120
- 238000011156 evaluation Methods 0.000 claims abstract description 51
- 238000012937 correction Methods 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims description 371
- 238000001514 detection method Methods 0.000 claims description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 20
- 238000005070 sampling Methods 0.000 description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 14
- 238000012544 monitoring process Methods 0.000 description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 description 9
- 238000012545 processing Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- 239000002341 toxic gas Substances 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
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- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013210 evaluation model Methods 0.000 description 4
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- 238000011161 development Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- LSJNBGSOIVSBBR-UHFFFAOYSA-N thionyl fluoride Chemical compound FS(F)=O LSJNBGSOIVSBBR-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
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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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
-
- 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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The application relates to an evaluation method of insulation degradation gas of a switch cabinet, which comprises the following steps: acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet, wherein the plurality of characteristic values at least comprise gas components and component concentrations; acquiring a component concentration correction value of the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values; a first evaluation result of the insulation deterioration gas is obtained based on the gas composition and the concentration correction value. According to the invention, the state of the switch cabinet is evaluated according to the corrected gas component concentration by correcting the acquired volume value of the concentration of the insulation deterioration gas, the evaluation result can be corrected, and the accuracy of judging the discharge condition and the insulation state in the switch cabinet is greatly improved.
Description
Technical Field
The application relates to the technical field of insulation deterioration gas detection, in particular to a method, a device and a system for evaluating insulation deterioration gas of a switch cabinet.
Background
With the increasing expansion of power grids and the popularization and popularization of unattended management modes and comprehensive automation of power distribution rooms, the influence and loss of power failure accidents caused by switch cabinet faults on production and life are more and more large. Insulation degradation caused by electricity, heat, chemistry and abnormal conditions inevitably exists in the switch cabinet in long-term operation, so that the electrical insulation strength is reduced, finally, faults occur, and different insulation degradation gas states can be generated under different switch cabinet operation states along with the generation and regular change of characteristic gas. Therefore, insulating degradation gas in the switch cabinet is monitored, latent faults of the switch cabinet can be diagnosed and early-warned in time, and therefore the faults of the switch cabinet are reduced.
Disclosure of Invention
In view of the above, there is a need to provide a method, an apparatus and a system for evaluating insulation deterioration gas in a switch cabinet, which can monitor and warn the insulation deterioration gas in the switch cabinet.
An evaluation method of insulation deterioration gas of a switch cabinet, comprising:
acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet, wherein the plurality of characteristic values at least comprise gas components and component concentrations;
acquiring a component concentration correction value of the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values;
a first evaluation result of the insulation deterioration gas is obtained based on the gas composition and the concentration correction value.
In one embodiment, the plurality of characteristic values further includes a temperature value, and the method further includes:
and obtaining a second evaluation result of the insulation deterioration gas according to the gas composition and the temperature value.
In one embodiment, the method further comprises the following steps:
and generating corresponding early warning information according to the first evaluation result and the second evaluation result, and sending the early warning information to a user so that the user can overhaul according to the early warning information.
In one embodiment, before acquiring a plurality of characteristic values of insulation deterioration gas in the switch cabinet, the method further comprises:
controlling a suction pump to pump insulation deterioration gas with a target volume value in the switch cabinet;
acquiring a plurality of characteristic values of insulation-degrading gas in a switchgear, including:
a plurality of characteristic values of insulation deterioration gas extracted from a switchgear are acquired.
In one embodiment, the method further comprises:
and generating a gas supplementing instruction carrying the target volume value, wherein the gas supplementing instruction is used for indicating the inflator pump to supplement the insulation gas of which the target volume value is not degraded into the switch cabinet.
In one embodiment, the concentration correction formula includes:
where ρ isxFor corrected gas component concentration, pmaxIs the maximum value of the component concentration of the obtained insulation deterioration gas, T is the temperature value of the obtained insulation deterioration gas, RH is the humidity value of the obtained insulation deterioration gas, Pa is the pressure value of the obtained insulation deterioration gas, V1Is the gas flow value in the air extraction process, V2To obtain the gas flow value in the process, O2-For the detected trace oxygen content value, alpha1、α2、α3、α4、α5、α6、α7Respectively, correction coefficients.
An apparatus for evaluating insulation deterioration gas of a switchgear, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet;
the correction module is used for correcting the component concentration in the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values so as to obtain a component concentration correction value in the insulation deterioration gas;
and the evaluation module is used for acquiring a first evaluation result of the insulation deterioration gas according to the detected gas composition and the concentration correction value in the insulation deterioration gas.
An evaluation system of a switchgear insulation deterioration gas, comprising:
a detection device for detecting and transmitting a plurality of characteristic values of insulation deterioration gas in the switchgear, the plurality of characteristic values including at least a gas component and a component concentration;
the microprocessor is connected with the detection device and used for receiving a plurality of characteristic values; correcting the component concentration in the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values to obtain a component concentration correction value in the insulation deterioration gas; acquiring a first evaluation result of the insulation deterioration gas according to the detected gas component in the insulation deterioration gas and the concentration correction value;
and the air pump is respectively connected with the detection device and the microprocessor and used for pumping the insulation degradation gas in the switch cabinet to the detection device under the control of the microprocessor.
In one embodiment, the detection device comprises:
the air inlet of the air guide pipe is connected with the air pump so as to receive the insulation deterioration gas to be detected, the air outlet of the air guide pipe is used for discharging the detected insulation deterioration gas, and the air guide pipe is used for forming a gas detection passage; the electrochemical sensor module is connected with the microprocessor, arranged on the gas detection passage and used for detecting a plurality of characteristic values of the insulation deterioration gas in the gas guide pipe;
the first gas flow detection module is connected with the microprocessor, arranged at the gas inlet and used for detecting a first gas flow value of the insulation deterioration gas in the gas extraction process;
and the second gas flow detection module is connected with the microprocessor, arranged at the gas outlet and used for detecting a second gas flow value of the insulation deterioration gas passing through the detection device.
In one embodiment, the system further comprises:
and the tail gas treatment device is connected with the gas outlet of the gas guide pipe and is used for carrying out synchronous tail gas treatment on the detected insulation deterioration gas.
The method for evaluating the insulation deterioration gas of the switch cabinet comprises the steps of obtaining a plurality of characteristic values of the insulation deterioration gas in the switch cabinet, wherein the characteristic values at least comprise gas components and component concentrations; acquiring a component concentration correction value of the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values; a first evaluation result of the insulation deterioration gas is obtained based on the gas composition and the concentration correction value. Because the evaluation of the insulation deterioration gas can be used as the evaluation of the operation state of the switch cabinet, the invention can correct the obtained volume value of the concentration of the insulation deterioration gas, evaluate the state of the switch cabinet by the corrected gas component concentration, correct the evaluation result, greatly improve the accuracy of judging the discharge condition and the insulation state in the switch cabinet, and is more suitable for evaluating the insulation performance state deterioration caused by the gradual development of the partial discharge fault of equipment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for evaluating insulation deterioration gas of a switchgear in one embodiment;
FIG. 2 is a second schematic flow chart of the method for evaluating insulation deterioration gas of a switch cabinet according to an embodiment;
FIG. 3 is a third schematic flow chart of the method for evaluating insulation deterioration gas of a switch cabinet according to an embodiment;
FIG. 4 is a schematic diagram of an apparatus for evaluating insulation deterioration gas of a switchgear in another embodiment;
FIG. 5 is a schematic diagram of an evaluation system of insulation deterioration gas of a switch cabinet in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
In one embodiment, as shown in fig. 1, a method for evaluating insulation deterioration gas of a switch cabinet is provided. Including steps S100-S300.
Step S100, acquiring a plurality of characteristic values of insulation deterioration gas in the switch cabinet, wherein the plurality of characteristic values at least comprise gas components and component concentrations.
Step S200, obtaining a component concentration correction value of the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values.
In the existing gas component detection technologies, such as infrared spectrum detection technology, electrochemical sensor detection technology and the like, only the analysis of the components of insulation degradation gas of a switch cabinet is focused on the detection of the gas components, although fault diagnosis can be carried out on the switch cabinet with a fault, due to the diffusion effect of insulation degradation gas molecules in the switch cabinet, sample gas adopted by a sampling system of the existing device may not completely represent the components or the concentration of the gas in the switch cabinet. When the characteristics such as temperature and humidity of the gas are not considered to affect the concentration of the insulation deterioration gas, for example, when ventilation and heat dissipation of the switch cabinet are performed, the concentration of the insulation deterioration gas generated due to partial discharge is diluted by air circulation, and the calculated gas generation rate is low, which finally affects the judgment of the discharge condition inside the switch cabinet and the insulation state of the monitoring switch cabinet. Therefore, it is necessary to combine a plurality of basic characteristics of the insulation-degrading gas and a correction formula to correct the concentration of the gas component to improve the accuracy of detection.
In step S300, a first evaluation result of the insulation deterioration gas is obtained according to the gas composition and the concentration correction value.
Wherein, the insulating gas in the switch cabinet mainly generates O when partial discharge occurs3、NO、NO2、N2O5Etc. degrade decomposition products of NO, N2O5Etc. are intermediate products of the decomposition reaction, and therefore, O can be utilized3NO gas is used as a characteristic component for judging the fault of partial discharge of the switch cabinet, and NO and N are utilized2O5The gas is used as a characteristic component for judging the fault stage of the partial discharge of the switch cabinet.
According to the method, the influence of gas molecule diffusion effect and gas flow rate difference of the independent gas chamber of the switch cabinet is considered, the obtained gas component concentration is corrected according to the parameters of the composition, temperature, humidity and the like of the gas to be detected, and then the first evaluation result of the insulation degradation gas of the switch cabinet is obtained according to the gas component and the component correction concentration, so that the detection precision of the insulation degradation gas of the switch cabinet can be improved, and monitoring, evaluation and analysis on different latent fault types and development stages of the gas chamber of the switch cabinet are realized.
In one embodiment, the concentration correction formula includes:
wherein,ρxfor corrected gas component concentration, pmaxIs the maximum value of the component concentration of the obtained insulation deterioration gas, T is the temperature value of the obtained insulation deterioration gas, RH is the humidity value of the obtained insulation deterioration gas, Pa is the pressure value of the obtained insulation deterioration gas, V1Is the gas flow value in the air extraction process, V2To obtain the gas flow value in the process, O2-For the detected trace oxygen content value, alpha1、α2、α3、α4、α5、α6、α7Respectively, correction coefficients.
In one embodiment, as shown in fig. 2, an evaluation method for insulation deterioration gas of a switch cabinet is provided, wherein the obtained multiple characteristic values of insulation deterioration gas further include temperature values, and the evaluation method for insulation deterioration gas of a switch cabinet further includes step S400.
And S400, acquiring a second evaluation result according to the gas composition and the temperature value.
The switch cabinet has faults, and not only partial discharge but also solid insulation damage is caused. For those switch cabinets in the initial stage of the fault, because the insulation degradation gas changes unobviously, for example, only an obvious temperature rise phenomenon exists in the initial stage of the overheat fault, and the concentration of CO in the insulation degradation gas does not change basically, the failure phenomenon occurs in the existing technical scheme, and the judgment of the fault stage of the switch cabinet cannot be realized. After the solid insulating material is damaged, the solid insulating material is firstly accompanied by obvious temperature rise, and then CO and CO are slowly generated2When the gas is mixed, CO can be used as a characteristic component for judging the fault of the damaged solid insulating material of the switch cabinet, wherein the CO is used as the characteristic component2The gas is a gas with a large proportion in the air, so the gas cannot be used as a characteristic component for detecting the damage of the solid insulating material, and therefore, the temperature is required to be used as a characteristic parameter for judging the fault stage of the partial discharge of the switch cabinet.
In particular, when a partial discharge fault occurs in a vacuum interrupter chamber of a switchgear, the internal insulation of the vacuum interrupter chamber is degraded by a gas SF6Degradation and decomposition into SO2、H2S and SO on, SO2、H2S is used as a characteristic component for judging partial discharge faults of the vacuum circuit breaker chamber; when a fault that solid insulating materials are damaged occurs in a vacuum circuit breaker chamber of a switch cabinet, SF6Gradually decomposing with increasing temperature: SF when the local superheat temperature is 260 DEG C6The decomposition starts, and this stage is accompanied by a small amount of SO2、SO2F2Waiting for gas generation; SO with increasing superheat temperature2Gradually increases to become the main component, and when the local overheating temperature reaches 340 ℃, H is generated in the gas2And S. Thus can utilize H2S、SO2The gas composition and the temperature value are used as characteristic components of damage faults and stage judgment of the solid insulating material of the vacuum circuit breaker chamber.
According to the method, through the addition of the analysis and evaluation of the gas components and the temperature, a second evaluation result obtained according to the gas components and the temperature value is formed, and the more accurate monitoring and evaluation analysis on different air chamber latent fault types and development stages of the switch cabinet can be improved.
In one embodiment, a switchgear latent fault phase assessment model is provided, as shown in table 1. Wherein the model provides a fault evaluation model for evaluating different equipment rooms in the switch cabinet according to the components of the insulation degradation gas, the corrected concentration value and the temperature value.
Wherein, X1％-X23％、T1-T3All are undetermined coefficients, and specific numerical values can be obtained by indoor tests. It is to be construed that, for example, the expression "carbon dioxide concentration 20%" means that the number or mass of carbon dioxide molecules is 20% of the mixed gas as referred to. The user can comprehensively evaluate the state of the switch cabinet through the switch cabinet latent fault stage evaluation model.
Table 1: switch cabinet latent fault stage evaluation model
In one embodiment, with continued reference to fig. 2, the method for evaluating insulation deterioration gas of a switchgear further includes step S500.
And S500, generating corresponding early warning information according to the first evaluation result and the second evaluation result, and sending the early warning information to a user so that the user can overhaul according to the early warning information.
Wherein the insulation gas such as SF is filled in the switch cabinet6Etc. and their degradation decomposition gases such as sulfur dioxide (SO)2) Hydrogen sulfide (H)2S), Hydrogen Fluoride (HF), thionyl fluoride (SOF)2) Nitrogen monoxide (NO), carbon monoxide (CO) and the like are toxic gases, and an early warning scheme is added, so that the condition that when the switch cabinet has serious faults, maintainers can directly overhaul the switch cabinet without knowing the switch cabinet, and the life health of the maintainers is endangered can be avoided; meanwhile, early warning work can be done in the early stage of the occurrence of the fault, so that the occurrence of larger accidents can be effectively avoided, and the loss is reduced.
In one embodiment, as shown in fig. 3, a method for evaluating insulation deterioration gas of a switch cabinet is provided. Before step S100, step S600 is further included.
Step S600, controlling an air extracting pump to extract insulation degradation gas with a target volume value in a switch cabinet;
step S100, acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet, comprising:
in step S110, a plurality of characteristic values of the insulation deterioration gas extracted from the switchgear are acquired.
In one embodiment, with continued reference to fig. 3, the method for evaluating insulation deterioration gas of a switchgear further includes step S700.
And step S700, generating a gas supplementing instruction carrying the target volume value, wherein the gas supplementing instruction is used for indicating the inflator pump to supplement the insulation gas of which the target volume value is not degraded into the switch cabinet.
In the method, after the corresponding insulation deterioration gas in the switch cabinet is extracted, the corresponding insulation deterioration gas which is not deteriorated is supplemented into the switch cabinet to be used as a corresponding insulation medium, and meanwhile, when the secondary detection is carried out, the switch cabinet contains residual decomposed gas, so that the detection accuracy is influenced.
It should be understood that although the various steps in the flowcharts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps or stages.
In one embodiment, as shown in fig. 4, an evaluation apparatus 100 for insulation degradation gas of a switch cabinet is provided, which is applied to the method as described above, and includes an acquisition module 110, a correction module 120 and an evaluation module 130. The obtaining module 110 is used for obtaining a plurality of characteristic values of insulation deterioration gas in the switch cabinet; the correction module 120 is configured to correct the component concentration in the insulation degradation gas according to a preset concentration correction formula and a plurality of characteristic values to obtain a component concentration correction value in the insulation degradation gas; the evaluation module 130 is configured to obtain a first evaluation result of the insulation degradation gas according to the detected gas component in the insulation degradation gas and the concentration correction value.
According to the device, the concentration value of the insulation degradation gas is corrected through the acquired multiple characteristic values of the insulation degradation gas in the switch cabinet, and the insulation degradation gas in the switch cabinet is evaluated according to the corrected component concentration value and the corrected gas components, so that the evaluation accuracy of the state of the insulation degradation gas in the switch cabinet can be improved, and the effect of more accurately monitoring the state of the switch cabinet is achieved.
For specific limitations of the apparatus for evaluating insulation degradation gas of a switch cabinet, reference may be made to the above limitations of the method for evaluating insulation degradation gas of a switch cabinet, which are not described herein again. The modules in the evaluation device for insulation degradation gas of the switch cabinet can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In one embodiment, as shown in fig. 5, there is provided an evaluation system 200 for insulation deterioration gas of a switch cabinet, it should be noted that, for simplicity of the illustration, many connections are not shown in the figure, and for concrete connections, refer to the description. The system 200 for evaluating insulation deterioration gas of a switchgear includes a detection device 230, a microprocessor 250, and a suction pump 210. The detection device 230 is used for detecting and transmitting a plurality of characteristic values of the insulation deterioration gas in the switch cabinet, wherein the characteristic values at least comprise gas components and component concentrations; the microprocessor 250 is connected with the detection device, and the microprocessor 250 is used for receiving a plurality of characteristic values; the microprocessor 250 corrects the concentration of the component in the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values to obtain a corrected value of the concentration of the component in the insulation deterioration gas; the microprocessor 250 also acquires a first evaluation result of the insulation deterioration gas based on the detected gas component in the insulation deterioration gas and the concentration correction value; the air pump 210 is connected to the detection device 230 and the microprocessor 250, respectively, and the air pump 210 is used for pumping the insulation deterioration gas in the switch cabinet to the detection device 230 under the control of the microprocessor 250.
In one embodiment, with continued reference to FIG. 5, the sensing device 230 includes a gas conduit, a first gas flow sensing module 231, and a second gas flow sensing module 237. The air inlet of the air duct is connected with the air pump 210 to receive the insulation deterioration gas to be detected, the air outlet of the air duct is used for discharging the detected insulation deterioration gas, and the air duct is used for forming a gas detection passage; the electrochemical sensor module 236 is connected with the microprocessor 250, is arranged on the gas detection path and is used for detecting a plurality of characteristic values of the insulation deterioration gas in the gas guide tube; the first gas flow detection module 231 and the microprocessor 250 are arranged at the gas inlet, and the first gas flow detection module 231 is used for detecting a first gas flow value of the insulation deterioration gas in the gas extraction process; the second gas flow detecting module 237 is connected to the microprocessor 250 and disposed at the gas outlet, and the second gas flow detecting module 237 is used to detect a second gas flow value of the insulation deterioration gas passing through the detecting device 230.
The evaluation system for the insulation degradation gas of the switch cabinet is divided into an air suction pump air suction process and a detection device detection process in the detection process, the gas flow rate of the gas in the air suction pump air suction process is mainly influenced by the air suction pump, and in the detection device, the gas flow rate does not receive the action of the air suction pump any more, so that the gas volume passing through an air suction channel in unit time and the gas volume passing through a detection channel in unit time have certain difference, and the gas flow is a key factor influencing the concentration of the detected gas.
According to the detection device, the first gas flow detection module and the second gas flow detection module are arranged to collect the gas flow in the gas extraction and detection processes respectively, so that the accuracy of the corrected gas concentration can be improved, and the accuracy of the overall state evaluation of the switch cabinet is improved.
In one embodiment, with continued reference to fig. 5, the system 200 for evaluating insulation degrading gases of a switchgear further includes an exhaust gas treatment device 290. The tail gas processing device 290 is connected with the gas outlet of the gas guide tube, and the tail gas processing device 290 is used for synchronously processing the detected insulation deterioration gas. The synchronous tail gas treatment is carried out while the detection is carried out, so that the detection efficiency can be improved, and the tail gas treatment time can be saved.
In one embodiment, with continued reference to fig. 5, a system 200 for evaluating insulation deterioration gas of a switch cabinet is provided, which includes a suction pump 210, a sampling control device 220, a total amount of sampled gas control module 221, a gas channel control module 222, and a sampled gas definition module 223, a detection device 230, a first gas flow detection module 231, a high precision temperature sensor module 232, a humidity sensor module 233, a pressure sensor module 234, a trace oxygen monitoring module 235, an electrochemical sensor module 236, a second gas flow monitoring module 237, an industrial collector 240, a microprocessor 250, a peripheral display 260, a standard gas tank 270, an insulation gas tank 280, a tail gas treatment device 290, a tail gas treatment tank 291, and a suction module 292.
The air pump 210 is provided with a self-sealing plug, an air inlet pipe of the air pump consists of 9 independent air inlet pipes, the air inlet pipes are divided into three groups and evenly connected to a high-pressure chamber, a bus chamber and a vacuum circuit breaker chamber of the switch cabinet, and an air outlet pipe is connected with the gas detection device. The air inlet of the air pump 210 is designed into two channels, the upper part is a gas production channel, the lower part is a sample gas channel, and the opening and closing of the air pump are controlled by a self-sealing plug.
The sampling control device 220 is connected with the microprocessor 250 and the lower part of the air suction pump 210 through cables, wherein the sampling control device 220 is controlled by the microprocessor 250 to control the air suction of the air suction pump 210. The sampling control means 220 includes: a sample gas total volume control module 221, a gas channel control module 222, and a sample gas definition module 223. A total sampling gas amount control module 221 in the sampling gas control module 220 controls the air pump 210 to suck air; the gas passage control module 222 controls the opening and closing of 9 passages of the gas inlet pipe of the air pump 210; the sampling gas definition module 223 logically defines the gas of nine passages of the gas inlet pipe, for example, the preset logical categories are high-pressure chamber gas No. 1-3, bus chamber gas No. 4-6 and vacuum circuit breaker chamber No. 7-9.
The detection device 230 comprises a first gas flow detection module 231, a high-precision temperature sensor module 232, a humidity sensor module 233, a pressure sensor module 234, a trace oxygen monitoring module 235, an electrochemical sensor module 236 and a second gas flow monitoring module 237 which are sequentially connected through a gas pipe.
The industrial collector 240 is connected with the first gas flow detection module 231, the high-precision temperature sensor module 232, the humidity sensor module 233, the pressure sensor module 234, the trace oxygen monitoring module 235, the electrochemical sensor module 236, the second gas flow monitoring module 237 and the microprocessor 250 through cables, and the industrial collector 240 is controlled by the microprocessor 250 and used for acquiring data information according to the detection modules in the detection device 230 and receiving parameters such as gas component types, concentration, temperature and humidity in a multi-channel and multi-dimensional manner; the built-in a/D conversion circuit converts the collected data information into digital signals and transmits the digital signals to the microprocessor 250.
The microprocessor 250 is connected to the industrial collector 240. The microprocessor adopts an STM32 single-chip microcomputer microprocessor, has the advantages of high performance, low power consumption and the like, and is used for improving the data processing speed through the good rapid processing capability of the STM32, so that the result can be rapidly calculated on site. The microprocessor 250 is connected with the peripheral display 260, the sampling control device 220 and the industrial collector 240 through cables, and is used for uniformly receiving various data and feeding back field operation instruction information.
The gas tank comprises a standard gas tank 270, an insulating gas tank 280 and a tail gas treatment tank 290, wherein the standard gas tank 270 is connected with the air pump 210 through a gas pipe, and the standard gas is N2The gas is used for exhausting residual gas in the device before gas detection; the insulating gas tank 280 is externally connected with a gas compressing device, the insulating gas tank 280 is fixed in a vacuum circuit breaker chamber of a switch cabinet through a gas pipe and is connected with the sampling control device 220 through a cable, and the gas tank is filled with SF6/N2And the mixed gas is used for timely compensating the insulation degradation gas of the vacuum circuit breaker chamber. The tail gas processing tank 291 is externally connected with a suction module 292, and is connected with the second gas flow monitoring module 237 through a gas pipe.
Wherein, the standard gas tank 270, the insulating gas tank 280 and the tail gas treatment tank 291 are all connected with pressure monitoring devices, when the pressure exceeds or is lower than a threshold value, the information is fed back to the microprocessor 250, and the microprocessor 250 sends out early warning information. And the joints of each gas tank, each gas inlet pipe and each gas chamber are provided with self-sealing taps so as to make good sealing measures.
The peripheral display 260 is embedded in the switch cabinet door and may be an LCD screen. Through the effect of peripheral display data, can make things convenient for the staff to see the data that evaluation system of cubical switchboard insulation degradation gas detected in real time to overhaul when producing the trouble rapidly.
In one embodiment, an evaluation method of the insulation deterioration gas of the switch cabinet is provided, and is applied to the evaluation system 200 of the insulation deterioration gas of the switch cabinet. The evaluation method of the insulation deterioration gas of the switch cabinet comprises steps S810-S880.
And step S810, calibrating. The sampling control device 220 receives the calibration instruction sent by the microprocessor 250 to control the self-sealing plug of the air pump 210 to work, the air production channel is closed, and the sample air channel is opened. The sampling control device 220 then controls the air pump 210 to start pumping the standard gas in the standard gas tank 270; at the same time the suction module 292 connected to the exhaust treatment tank 291 is put into operation. After a period of time, the air pump 210 stops working, the sample gas passage is closed, and the exhaust gas treatment device 290 continues to work.
And step S820, sampling. The sampling control device 220 receives a sampling instruction sent by the microprocessor 250 to control the air pump 210 to open the air production channel by the self-sealing plug. At the same time, the sample gas definition module 223 of the sample control device 220 begins numbering the gases of the gas channels. And transmits the gas number information to the industrial collector 240.
And step S830, detecting. The detection device 230 receives the detection instruction sent by the microprocessor 250, and the first gas flow detection module 231, the high-precision temperature sensor module 232, the humidity sensor module 233, the pressure sensor module 234, the trace oxygen monitoring module 235, the electrochemical sensor module 236, and the second gas flow monitoring module 237 in the detection device 230 start to measure the first gas flow, the temperature, the humidity, the gas pressure, the trace oxygen content, the gas composition, the composition concentration, and the second gas flow of the gas, and transmit the acquired gas data information to the industrial collector 240.
And step 840, transmitting. The industrial collector 240 receives a transmission instruction sent by the microprocessor 250 to convert the collected gas number information and gas data information into digital signals and transmit the digital signals to the microprocessor 250.
And step S850, processing. The microprocessor 250 obtains a corrected gas component concentration value for the plurality of obtained gas characteristic values including a temperature value, a humidity value, a pressure value, a first gas flow value, a second gas flow value, a trace oxygen content, a gas component, and a component concentration corrected gas component concentration.
And step S860, evaluation. The microprocessor 250 screens the toxic gas concentration according to the corrected gas component concentration value, and then compares the gas component and the corrected gas component concentration value with the switch cabinet latent fault evaluation model to evaluate the state of the switch cabinet.
Wherein the gas component such as sulfur dioxide (SO) is decomposed due to the deterioration of the insulating gas in the switch cabinet2) Hydrogen sulfide (H)2S), Hydrogen Fluoride (HF), thionyl fluoride (SOF)2) Nitrogen monoxide (NO), carbon monoxide (CO), etc. are toxic gases, and therefore, when gas components are obtained, the toxic gases can be screened and marked, and the toxic state of the gases can be evaluated according to the existing toxic gas component table.
And step S870, displaying the detection data by an LCD (liquid crystal display), early warning faults and toxic gases, and informing a centralized control center.
In step S880, after the detection is completed, the microprocessor 250 sends an end instruction to the sampling control device 220 to control the gas production channel to be closed. For example, the detection part is a vacuum circuit breaker chamber, the microprocessor 250 sends a gas supplementing command of the sampling control device 220 and the volume value of the extracted gas, the microprocessor 250 controls the gas compressing device of the insulating gas tank 280 to work, the insulating gas in the vacuum circuit breaker chamber is supplemented, the supplementing amount is the volume value of the extracted gas, and the channel is closed after the completion.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for evaluating insulation deterioration gas of a switch cabinet is characterized by comprising the following steps:
acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet, wherein the plurality of characteristic values at least comprise gas components and component concentrations;
acquiring a component concentration correction value of the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values;
a first evaluation result of the insulation deterioration gas is acquired based on the gas composition and the concentration correction value.
2. The method of claim 1, wherein the plurality of characteristic values further comprises a temperature value, the method further comprising:
and obtaining a second evaluation result of the insulation deterioration gas according to the gas composition and the temperature value.
3. The method of claim 2, further comprising:
and generating corresponding early warning information according to the first evaluation result and the second evaluation result, and sending the early warning information to a user so that the user can overhaul according to the early warning information.
4. The method of claim 1, wherein before obtaining the plurality of characteristic values of the insulation-degrading gas in the switchgear, further comprising:
controlling a suction pump to pump insulation deterioration gas with a target volume value in the switch cabinet;
the acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet comprises:
a plurality of characteristic values of insulation deterioration gas extracted from the switch cabinet are acquired.
5. The method of claim 4, further comprising:
and generating an air supplement instruction carrying the target volume value, wherein the air supplement instruction is used for instructing an air pump to supplement the insulation gas of which the target volume value is not degraded into the switch cabinet.
6. The method of claim 4, wherein the concentration correction formula comprises:
where ρ isxFor corrected gas component concentration, pmaxIs the maximum value of the component concentration of the obtained insulation deterioration gas, T is the temperature value of the obtained insulation deterioration gas, RH is the humidity value of the obtained insulation deterioration gas, Pa is the pressure value of the obtained insulation deterioration gas, V1Is the gas flow value in the air extraction process, V2To obtain the gas flow value in the process, O2-For the detected trace oxygen content value, alpha1、α2、α3、α4、α5、α6、α7Respectively, correction coefficients.
7. An apparatus for evaluating insulation-degrading gas of a switchgear, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a plurality of characteristic values of insulation deterioration gas in a switch cabinet;
the correction module is used for correcting the component concentration in the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values so as to obtain a component concentration correction value in the insulation deterioration gas;
and the evaluation module is used for acquiring a first evaluation result of the insulation deterioration gas according to the detected gas component in the insulation deterioration gas and the concentration correction value.
8. An evaluation system for insulation deterioration gas of a switchgear, comprising:
a detection device for detecting and transmitting a plurality of characteristic values of insulation deterioration gas in the switchgear, the plurality of characteristic values including at least a gas component and a component concentration;
a microprocessor connected with the detection device and used for receiving a plurality of characteristic values; correcting the component concentration in the insulation deterioration gas according to a preset concentration correction formula and a plurality of characteristic values to obtain a component concentration correction value in the insulation deterioration gas; acquiring a first evaluation result of the insulation deterioration gas according to the detected gas component in the insulation deterioration gas and the concentration correction value;
and the air pump is respectively connected with the detection device and the microprocessor and is used for pumping the insulation deterioration gas in the switch cabinet to the detection device under the control of the microprocessor.
9. The system of claim 8, wherein the detection device comprises:
the air inlet of the air guide pipe is connected with the air pump so as to receive the insulation deterioration gas to be detected, the air outlet of the air guide pipe is used for discharging the detected insulation deterioration gas, and the air guide pipe is used for forming a gas detection passage; the electrochemical sensor module is connected with the microprocessor, arranged on the gas detection passage and used for detecting a plurality of characteristic values of the insulation deterioration gas in the gas guide tube;
the first gas flow detection module is connected with the microprocessor, arranged at the gas inlet and used for detecting a first gas flow value of the insulation deterioration gas in the gas extraction process;
and the second gas flow detection module is connected with the microprocessor, arranged at the gas outlet and used for detecting a second gas flow value of the insulation deterioration gas passing through the detection device.
10. The system of claim 9, further comprising:
and the tail gas treatment device is connected with the gas outlet of the gas guide pipe and is used for carrying out synchronous tail gas treatment on the detected insulation deterioration gas.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
| CN103412247A (en) * | 2013-08-27 | 2013-11-27 | 国家电网公司 | Ring main unit partial discharge monitoring system |
| US20150247788A1 (en) * | 2012-09-04 | 2015-09-03 | Thomas Alfred Paul | Device And Method For Monitoring Rooms Equipped With High-Voltage Apparatuses |
| CN210442337U (en) * | 2018-11-20 | 2020-05-01 | 河南省日立信股份有限公司 | Mixed insulating gas detection system based on multisensor |
| CN111175204A (en) * | 2020-01-16 | 2020-05-19 | 国网天津市电力公司电力科学研究院 | Method for monitoring particulate matters and abnormal components in air inside switch cabinet |
| CN112444604A (en) * | 2020-11-08 | 2021-03-05 | 国网辽宁省电力有限公司电力科学研究院 | Switch cabinet insulation degradation gas detection system and method |
| CN112688222A (en) * | 2020-11-12 | 2021-04-20 | 江苏南瑞帕威尔电气有限公司 | Two-in-one low-pressure locking device suitable for gas insulation ring main unit |
| CN213149149U (en) * | 2020-08-24 | 2021-05-07 | 常州中能电力科技有限公司 | Ultrahigh frequency-based high-voltage switch cabinet partial discharge online monitoring system |
-
2021
- 2021-08-18 CN CN202110947393.7A patent/CN113820452B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
| US20150247788A1 (en) * | 2012-09-04 | 2015-09-03 | Thomas Alfred Paul | Device And Method For Monitoring Rooms Equipped With High-Voltage Apparatuses |
| CN103412247A (en) * | 2013-08-27 | 2013-11-27 | 国家电网公司 | Ring main unit partial discharge monitoring system |
| CN210442337U (en) * | 2018-11-20 | 2020-05-01 | 河南省日立信股份有限公司 | Mixed insulating gas detection system based on multisensor |
| CN111175204A (en) * | 2020-01-16 | 2020-05-19 | 国网天津市电力公司电力科学研究院 | Method for monitoring particulate matters and abnormal components in air inside switch cabinet |
| CN213149149U (en) * | 2020-08-24 | 2021-05-07 | 常州中能电力科技有限公司 | Ultrahigh frequency-based high-voltage switch cabinet partial discharge online monitoring system |
| CN112444604A (en) * | 2020-11-08 | 2021-03-05 | 国网辽宁省电力有限公司电力科学研究院 | Switch cabinet insulation degradation gas detection system and method |
| CN112688222A (en) * | 2020-11-12 | 2021-04-20 | 江苏南瑞帕威尔电气有限公司 | Two-in-one low-pressure locking device suitable for gas insulation ring main unit |
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| CN113820452B (en) | 2023-07-07 |
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