CN113552434A - Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment - Google Patents
Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment Download PDFInfo
- Publication number
- CN113552434A CN113552434A CN202110828296.6A CN202110828296A CN113552434A CN 113552434 A CN113552434 A CN 113552434A CN 202110828296 A CN202110828296 A CN 202110828296A CN 113552434 A CN113552434 A CN 113552434A
- Authority
- CN
- China
- Prior art keywords
- oil
- defect
- current transformer
- simulation test
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Abstract
The invention provides an oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment. The expert comprehensive judgment system comprises six units, namely data entry, defect matching, simulation test setting, comprehensive judgment, defect equivalent calculation and output. The defect troubleshooting system obtains the defect cause of the oil-immersed current transformer to be debugged, and after the defect cause of the oil-immersed current transformer is matched and set by the expert comprehensive judgment system, the simulation test platform utilizes a simulation test sample to research the low-temperature operation representation of the oil-immersed current transformer. The test results of the electrical parameters at different temperatures are used for calculating the electric field and the temperature field of the oil-immersed current transformer, and the calculation results can prove the low-temperature simulation test results. The system can provide technical suggestions for the type selection, operation and maintenance of the oil-immersed electrical equipment in a low-temperature and large-temperature-difference operation environment.
Description
Technical Field
The invention belongs to the technical field of electric engineering power transmission and transformation, and relates to a system for researching the low-temperature characteristics of an oil-immersed current transformer based on expert comprehensive judgment.
Background
External environmental conditions such as temperature, humidity and pollution are factors which must be considered in the model selection stage of the power transmission and transformation equipment. Due to the limitation of the regional nature and the climatic conditions of the geographic environment, how the operation of the oil-immersed electrical equipment is affected by the special environmental conditions of low temperature and large temperature difference, how the high-efficiency operation and maintenance of the equipment are required after the equipment is put into operation, and design manuals and national standards do not give clear suggestions.
Different from the characteristic that the main transformer body has huge oil storage capacity, the oil-immersed current transformer belongs to less-oil electrical equipment, and the 'recommended operation stage reduces the times of oil sampling as much as possible' is clearly indicated in the factory specifications of the current transformer. Therefore, the historical monitoring data of the insulating oil of the oil-immersed current transformer is less, and most defects show a sudden nature.
In the actual production process, the oil-immersed electrical equipment is inevitably put into production in autumn and winter in northern areas, and the oil is filled in the oil-immersed electrical equipment in winter due to expansion caused by heat and contraction caused by cold. In addition, the wind energy resources in the northwest severe cold areas of China are rich, the construction scale of wind power plants is huge, and a novel electric power system prototype mainly based on clean energy delivery is formed. However, grassland or desert regions with rich wind energy resources are also regions with low environmental temperature in winter and large temperature difference between winter, summer and morning and evening. According to authority statistics, the operation defect rate of oil-immersed electrical equipment (such as a box-type transformer and an oil-immersed current transformer) in the same batch and the same model is obviously higher in northern cold regions than in climatic warm regions. The cold start problem of oil-immersed electrical equipment caused by winter production and start and stop of a wind driven generator is that the technical focusing power gradually rises in recent years.
At present, due to the influence of special environmental conditions of low temperature and large temperature difference on oil-immersed electrical equipment, although the influence is accepted by the experience of technical personnel, no effective verification means exists. One of the difficulties is how to effectively separate the defects from each other by influencing the development of the defects themselves and the deterioration of the defects by temperature. In view of this, it is necessary to construct a low-temperature characteristic research system of the oil-filled electrical device, and to explore the influence of a special environmental condition with a low temperature and a large temperature difference on the oil-filled electrical device by means of the low-temperature operation characteristics of a certain typical oil-filled electrical device in the low-temperature and high-temperature and low-temperature change processes.
Disclosure of Invention
The invention provides an oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment, which is characterized in that a defect troubleshooting system is used for acquiring a defect cause of an oil-immersed current transformer to be debugged, and after the defect cause is matched and set by the expert comprehensive judgment system, a low-temperature operation representation of the defect is simulated by using a simulation test platform and a monitoring system thereof so as to extract the influence of temperature on the defect of the transformer. And then, electric field and temperature field simulation calculation of low-temperature operation characteristics is carried out aiming at typical defects of the oil-immersed current transformer by utilizing test results of electrical parameters at different temperatures, and low-temperature simulation test results are proved, so that the research on the low-temperature operation characteristics of the oil-immersed current transformer is realized.
The purpose of the invention is realized by the following technical scheme.
The invention provides an oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment, which comprises a defect troubleshooting system, an expert comprehensive judgment system, a parameter testing device, a simulation test platform and a monitoring system thereof;
the system is used for checking the defect cause of the oil-immersed current transformer according to the historical test result, the diagnosis test result and the disassembly process of the oil-immersed current transformer to be checked; the parameter testing device is used for testing the electrical parameters of the oil-immersed current transformer to be checked and comprises a workstation, a temperature regulating device, an electrical parameter detecting instrument and a testing electrode; the simulation test platform and the monitoring system thereof are used for simulating the operating characteristics of the oil-immersed current transformer in the low-temperature environment, the simulation test platform selects the oil-immersed current transformer entity equipment as a simulation test sample, and the operating condition of the oil-immersed current transformer is simulated in the low-temperature environment and the temperature change process and under the rated operating condition;
the expert comprehensive judgment system comprises a data entry unit, a defect matching unit, a simulation test setting unit, a comprehensive judgment unit, a defect equivalent calculation unit and an output unit; the defect matching unit is pre-stored with typical structure of the oil-immersed current transformer and data of typical defects of the oil-immersed current transformer;
the defect inspection system is respectively connected with the data input unit and the comprehensive judgment unit in a one-way mode, and transmits the structural information and the defect inspection data of the oil-immersed current transformer to be inspected to the data input unit and the comprehensive judgment unit; the data input unit is sequentially and unidirectionally connected with the defect matching unit and the simulation test setting unit; after the data input unit combs the structural information and the defect checking data, the structural information and the defect checking data are transmitted to the defect matching unit; the defect matching unit matches the structure information and defect checking data with the typical structure and typical defects of the built-in oil-immersed current transformer in an inosculation manner, and then transmits the simulation test requirements to the simulation test setting unit
The simulation test setting unit is connected with the simulation test platform, the monitoring system of the simulation test platform and the comprehensive judgment unit in a one-way mode in sequence, and sets a simulation test control strategy according to the received simulation test requirement and transmits the simulation test control strategy to the simulation test platform and the monitoring system of the simulation test platform; the simulation test platform and the monitoring system thereof utilize a simulation test sample to carry out a simulation test on the operating characteristics of the oil-immersed current transformer in a low-temperature environment, and transmit simulation test data to the comprehensive judgment unit; the simulation test setting unit is sequentially connected with the parameter testing device and the comprehensive judgment unit in a one-way mode, transmits parameter testing requirements to the parameter testing device, and transmits parameter testing results back to the comprehensive judgment unit after the parameter testing device carries out testing;
the comprehensive judgment unit is sequentially and unidirectionally connected with the defect equivalent calculation unit and the defect matching unit; after receiving the information transmitted by the comprehensive judgment unit, the defect equivalent calculation unit constructs a defect equivalent model of the oil-immersed current transformer to be checked, and feeds back the calculation result to the defect matching unit to complete the expansion of the typical structure and the typical defects of the oil-immersed current transformer;
the comprehensive judgment unit and the defect equivalent calculation unit are respectively connected with the output unit in a one-way mode, and the output unit is used for outputting a comprehensive judgment result.
Preferably, the defect troubleshooting system at least comprises an information input module A, a test testing device, a sample detection device, a central processing module, a disassembly process recording module, a defect diagnosis module and an information output module A;
the information input module A is unidirectionally connected with the central processing module and the disassembling process recording module, transmits the structural information, the defect performance and the historical test data of the oil-immersed current transformer to be checked to the central processing module and transmits the structural information of the oil-immersed current transformer to be checked to the disassembling process recording module; the testing device is connected with the central processing module in a one-way mode and used for transmitting a testing result of the testing device to the central processing module; the sample detection device is connected with the disassembly process recording module in a bidirectional mode, photographs are taken for the disassembly process according to the disassembly and investigation steps of the oil-immersed current transformer to be investigated, which are prestored by the disassembly process recording module, the taken samples are detected, and the photographed photographs and the sample detection information are fed back to the disassembly process recording module; the disassembly process recording module is connected with the defect diagnosis module and the information output module A in a one-way mode, the disassembly process recording module transmits the integrated disassembly information to the defect diagnosis module, and the defect diagnosis module analyzes and diagnoses the integrated disassembly information, gives the defect cause of the oil-immersed current transformer to be checked and transmits the defect cause to the information output module A.
Preferably, the simulation test platform and the monitoring system thereof comprise a control device, a detection device, an information input module B, an information processing module, an information output module B, a reminding module and a temperature comparison module, wherein the simulation test platform for the operating characteristics of the oil-immersed current transformer in the low-temperature environment at least comprises a controllable temperature test box and an entity device of the oil-immersed current transformer placed in the controllable temperature test box as a simulation test sample;
the control device is used for regulating and controlling the test current, the test voltage and the test temperature of the oil-immersed current transformer operating characteristic simulation test platform in the low-temperature environment; the detection device is used for testing and detecting the insulating property of the simulation test sample.
Preferably, the receiving, by the equivalent calculating unit, the information transmitted by the comprehensive judging unit includes: the system comprises a defect checking system, a simulation test platform, a monitoring system and a parameter testing device, wherein the defect checking system obtains structural information and defect checking data, the simulation test platform and the monitoring system obtain simulation test data, and the parameter testing device obtains parameter testing data.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the defect troubleshooting system obtains the defect cause of the oil-immersed current transformer to be debugged, and after the defect cause of the oil-immersed current transformer to be debugged is matched and set by the expert comprehensive judgment system, the low-temperature running state of the oil-immersed current transformer is researched by utilizing the simulation test platform and the simulation test sample configured in the monitoring system of the simulation test platform. The system takes the temperature as the only variable factor to simulate and explore the influence of low temperature on the oil-immersed current transformer, and separates the development of the defect and the degradation influence of the temperature on the defect.
2. Acquiring structural information, test data and defect cause of the oil-immersed current transformer to be inspected based on a defect inspection system, giving a control strategy of simulation test voltage, test current and temperature by an expert comprehensive judgment system, and researching the development process of defects by using simulation test samples; the matched simulation test has strong pertinence, more visual test result and more clear technical guidance.
3. The system is provided with a sample electrical parameter testing device, so that the electrical parameters of the sample can be tested according to the requirements of a simulation test, necessary parameters are provided for defect equivalent calculation, a defect equivalent model of the oil-immersed current transformer to be checked is constructed, and the coupling calculation of an electric field, a magnetic field and a temperature field of a typical oil-immersed current transformer is realized. The technical measures can visually show the distribution conditions of the electric field, the magnetic field and the temperature field of the oil-immersed current transformer, and the calculation result can be used for proving the low-temperature simulation test result, so that the research on the low-temperature operation characteristics of the oil-immersed current transformer is realized.
4. Through the troubleshooting of the defect troubleshooting system, the simulation test of the simulation test platform and the monitoring system thereof, and the micro-field calculation of the defect equivalent calculation unit, the defect analysis process of the oil-immersed current transformer to be debugged is more real and reliable, and the analysis method and the result can further enrich the algorithm library of the defect matching unit. Along with the accumulation of test data, a computer library of the expert comprehensive judgment system is more full, field accident analysis can be better assisted, and the low-temperature operation characteristic of the oil-immersed transformer can be better refined.
Drawings
Fig. 1 is a structural diagram of a system for researching low-temperature characteristics of an oil-immersed current transformer based on expert comprehensive judgment.
Fig. 2 is a structural diagram of a defect inspection system of the oil-immersed current transformer.
Fig. 3 is a schematic diagram of a process of disassembling the oil-immersed vertical current transformer and checking defects of the oil-immersed vertical current transformer.
Fig. 4 is a structural diagram of a simulation test platform of the operating characteristics of the current transformer in a low-temperature environment and a monitoring system thereof.
Fig. 5 is a schematic diagram of a current transformer operating characteristic simulation test platform in a low-temperature environment.
Wherein, fig. 1: 100. a defect review system; 200. an expert comprehensive judgment system; 300. a parameter testing device; 400. a simulation test platform and a monitoring system thereof; 210. a data entry unit; 220. a defect matching unit; 230 a simulation test setting unit; 240. a comprehensive judgment unit; 250 a defect equivalence calculating unit; 260 output unit.
In fig. 2: 110. an information input module A; 120. a test testing device; 130. a sample detection device; 140. a central processing module; 150. disassembling the process recording module; 160. a defect diagnosis module; 170. an information output module A; 121. an insulation resistance tester; 122. a direct current resistance tester; 123. high voltage dielectric loss and capacitance testing device; 124. a partial discharge test device; 125. a dissolved gas detection device in oil; 126. a moisture content detector in the oil; 127. an oil pressure resistance detector; 131. a camera; 132. a galvano-mirror scanner; 133. an elemental energy spectrum analyzer; 134. controllable temperature sample soak device.
In fig. 4 and 5: 401. a temperature-controllable test chamber; 402. simulating a test sample; 410. a control device; 411. a current generating device; 412. a voltage generating device; 413. a temperature control device; 420. a detection device; 426. a device for detecting the temperature of the outer surface of the test sample; 427. a device for detecting the internal temperature of the sample; 428. an insulating property detection device; 429. a discharge signal detection device; 430. an information input module B; 440. a data processing module; 450. an information output module B; 460. a reminding module; 470. and a temperature comparison module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is a structural diagram of a system for researching low-temperature characteristics of an oil-immersed current transformer based on expert comprehensive judgment.
As can be seen from fig. 1, the invention provides a system for researching low-temperature characteristics of an oil-immersed current transformer based on expert comprehensive judgment, and the system for researching low-temperature characteristics comprises a defect troubleshooting system 100, an expert comprehensive judgment system 200, a parameter testing device 300, a simulation test platform and a monitoring system 400 thereof.
The defect troubleshooting system 100 is a defect troubleshooting system of the oil-immersed current transformer, and the system is used for troubleshooting the defect cause of the oil-immersed current transformer according to the historical test result, the diagnosis test result and the disassembly process of the oil-immersed current transformer to be debugged; the parameter testing device 300 is used for testing the electrical parameters of the oil-immersed current transformer to be checked and comprises a workstation, a temperature regulating device, an electrical parameter detecting instrument and a testing electrode; the simulation test platform and the monitoring system 400 thereof are used for simulating the operating characteristics of the oil-immersed current transformer in the low-temperature environment, the simulation test platform selects the oil-immersed current transformer entity equipment as a simulation test sample, and the operating condition of the oil-immersed current transformer is simulated in the low-temperature environment and the temperature change process and under the rated operating condition;
the expert comprehensive judgment system 200 comprises a data entry unit 210, a defect matching unit 220, a simulation test setting unit 230, a comprehensive judgment unit 240, a defect equivalence calculation unit 250 and an output unit 260; the defect matching unit 220 is pre-stored with a typical structure of the oil-immersed current transformer and data of typical defects thereof;
the defect troubleshooting system 100 is respectively connected with the data entry unit 210 and the comprehensive judgment unit 240 in a one-way manner, and transmits the structural information and the defect troubleshooting data of the oil-immersed current transformer to be debugged to the data entry unit 210 and the comprehensive judgment unit 240; the data entry unit 210 is sequentially and unidirectionally connected with the defect matching unit 220 and the simulation test setting unit 230; after the data entry unit 210 sorts the structure information and the defect inspection data, it transmits them to the defect matching unit 220; the defect matching unit 220 matches the structure information and the defect troubleshooting data with the typical structure of the built-in oil-immersed current transformer and the typical defects thereof in a matching manner, and then transmits the simulation test requirements to the simulation test setting unit 230;
the simulation test setting unit 230 is sequentially connected with the simulation test platform and the monitoring system 400 thereof and the comprehensive judgment unit 240 in a one-way manner, and the simulation test setting unit 230 sets a simulation test control strategy according to the received simulation test requirement and transmits the simulation test control strategy to the simulation test platform and the monitoring system 400 thereof; the simulation test platform and the monitoring system 400 thereof utilize a simulation test sample to carry out a simulation test of the operating characteristics of the oil-immersed current transformer in a low-temperature environment, and transmit the simulation test data to the comprehensive judgment unit 240; the simulation test setting unit 230 is further connected with the parameter testing device 300 and the comprehensive judgment unit 240 in a one-way manner, the simulation test setting unit 230 transmits the parameter testing requirement to the parameter testing device 300, and the parameter testing device 300 transmits the parameter testing result back to the comprehensive judgment unit 240 after testing;
the comprehensive judgment unit 240 is sequentially connected with the defect equivalent calculation unit 250 and the defect matching unit 220 in a unidirectional way; after receiving the information transmitted by the comprehensive judgment unit 240, the defect equivalent calculation unit 250 constructs a defect equivalent model of the oil-immersed current transformer to be checked, and feeds back the calculation result to the defect matching unit 220, so as to complete the expansion of the typical structure and the typical defects of the oil-immersed current transformer;
the comprehensive judgment unit 240 and the defect equivalence calculation unit 250 are respectively connected to an output unit 260 in a single direction, and the output unit 260 is configured to output a comprehensive judgment result.
In this embodiment, the receiving, by the equivalence calculating unit 250, the information transmitted by the comprehensive judging unit 240 includes: the structure information and the defect inspection data obtained by the defect inspection system 100, the simulation test data obtained by the simulation test platform and the monitoring system 400 thereof, and the parameter test data obtained by the parameter test device 300
Fig. 2 is a structural diagram of a defect inspection system of the oil-immersed current transformer. As can be seen from the figure, the defect inspection system 100 at least includes an information input module a110, a test testing device 120, a sample detection device 130, a central processing module 140, a disassembly process recording module 150, a defect diagnosis module 160, and an information output module a 170;
the information input module a110 is unidirectionally connected with the central processing module 140 and the disassembly process recording module 150, and the information input module a110 transmits the structural information, the defect performance and the historical test data of the oil-immersed current transformer to be inspected to the central processing module 140 and transmits the structural information of the oil-immersed current transformer to be inspected to the disassembly process recording module 150.
The testing device 120 is unidirectionally connected with the central processing module 140, and is used for transmitting the testing result of the testing device 120 to the central processing module 140; the test device 120 includes at least: an insulation resistance tester 121, a direct current resistance tester 122, a high voltage dielectric loss and capacitance tester 123, a partial discharge tester 124, an oil dissolved gas detector 125, an oil moisture content detector 126 and an oil withstand voltage detector 127. The insulation resistance tester 121, the direct current resistance tester 122, the high-voltage dielectric loss and capacitance tester 123 and the local discharge tester 124 are used for testing electrical parameters such as an insulation mat and a direct current resistance of the oil-immersed current transformer to be checked, and the dissolved gas in oil detector 125, the moisture content in oil detector 126 and the oil withstand voltage detector 127 are used for detecting the insulation oil performance of the oil-immersed current transformer to be checked.
The sample detection device 130 is bidirectionally connected with the disassembly process recording module 150, photographs the disassembly process, detects the taken sample according to the disassembly and investigation steps of the oil-immersed current transformer to be investigated, which are prestored in the disassembly process recording module 150, and feeds back the photographed photograph and the sample detection information to the disassembly process recording module 150; the sample detection device 130 comprises a camera 131, a microscope scanner 132, an elemental energy spectrum analyzer 133 and a temperature-controllable sample soaking device 134, and is used for shooting a sample taken in the disassembly process of the oil-immersed current transformer to be checked and detecting the sample taken in the disassembly process of the oil-immersed current transformer to be checked.
The disassembly process recording module 150 is unidirectionally connected with the defect diagnosis module 160 and the information output module a170, the disassembly process recording module 150 transmits the integrated disassembly information to the defect diagnosis module 160, and the defect diagnosis module 160 analyzes and diagnoses the integrated disassembly information, provides a defect cause of the oil-immersed current transformer to be inspected, and transmits the defect cause to the information output module a 170.
The central processing module 140 is connected to the defect diagnosing module 160 in a unidirectional manner, and after the information input module a110 and the information transmitted by the testing device 120 are screened and sorted by the central processing module 140, the screened and sorted effective information of the oil-immersed current transformer to be inspected is transmitted to the defect diagnosing module 160.
The defect diagnosis module 160 is unidirectionally connected with the information output module 170. The defect diagnosis module 160 integrates the screened and sorted effective information of the oil-immersed current transformer to be inspected, which is transmitted by the central processing module 140, and the integrated disassembly information transmitted by the disassembly process recording module 150, analyzes and diagnoses the defect cause of the oil-immersed current transformer to be inspected, and transmits the defect cause to the information output module a 170.
The oil-immersed current transformer is divided into an oil-immersed vertical type and an oil-immersed inverted vertical type. Taking an oil-immersed upright current transformer as an example for explanation, fig. 3 is a schematic diagram of a disassembling process and a defect checking process of the oil-immersed upright current transformer, and the checking process is built in the disassembling process recording module 150. As can be seen from the figure, in this embodiment, the disassembling and inspecting step of the oil-immersed current transformer to be inspected includes:
step 1, collecting structural information of an oil-immersed upright current transformer to be checked;
step 2, developing a diagnostic test before disassembling the oil immersed upright current transformer to be checked;
step 3, disassembling the oil immersed upright current transformer to be inspected, and gradually inspecting defects;
step 3.1, checking the sealing condition and emptying the insulating oil;
step 3.2, separating the body;
step 3.3, disassembling the body and gradually checking the defects of the body;
step 3.4, measuring the size of the primary conductor;
step 4, calculating and checking the actually measured inter-screen capacitance between the adjacent main capacitive screens;
and 5, detecting the samples taken in the step 2 and the step 3.
In this embodiment, after the disassembly process recording module 150 in the defect inspection system 100 sends the disassembly, detection and sampling commands in the disassembly process, the technician retains the samples prompted by the system, and at this time, the defect inspection system 100 also sends a sample test start prompt to the parameter testing device 300, so as to ensure the correspondence between the sample sources and the sample detection results in the case of multiple samples.
In this embodiment, the samples tested by the parameter testing device 300 are insulating oil, high-voltage cable paper tape and laminated paper board; the electrical parameters tested were at least: viscosity, density, specific heat capacity, thermal conductivity, relative permeability, relative permittivity, resistivity and specific heat. The test results of the electrical parameters at different temperatures provide the electrical parameters of insulating media such as insulating oil, high-voltage cable paper tapes and the like used for simulation calculation for the defect equivalence calculating unit 250, so as to perform simulation calculation and analysis of the electric field and the temperature field of the oil-immersed current transformer.
Fig. 4 is a structural diagram of a current transformer operating characteristic simulation test platform and a monitoring system thereof in a low-temperature environment, and fig. 5 is a schematic diagram of the current transformer operating characteristic simulation test platform in the low-temperature environment. As shown in fig. 4 and fig. 5, the simulation test platform and the monitoring system 400 thereof include a control device 410, a detection device 420, an information input module B430, an information processing module 440, an information output module B450, a reminding module 460, and a temperature comparison module 470, where the simulation test platform for the operating characteristics of the oil-immersed current transformer in the low-temperature environment at least includes a temperature-controllable test chamber 401, and an oil-immersed current transformer entity device placed in the temperature-controllable test chamber 401 as a simulation test sample 402;
the control device 410 is used for regulating and controlling the test current, the test voltage and the test temperature of the oil-immersed current transformer operating characteristic simulation test platform in the low-temperature environment; the testing device 420 is used for testing and testing the insulation performance of the simulation test sample 402. The control means 410 includes a current generating means 411, a voltage generating means 412 and a temperature control means 413, and the detecting means includes a sample outer surface temperature detecting means 426, a sample inner temperature detecting means 427, an insulating property detecting means 428 and a discharge signal detecting means 429.
The information input module B430 is unidirectionally connected to the information processing module 440, and is configured to input basic information of the simulation test sample 402 and transmit the information to the information processing module 440.
The temperature comparison module 470 is respectively connected with the temperature control device 413, the test article outer surface temperature detection device 426 and the test article internal temperature detection device 427 in a one-way manner, and is respectively used for receiving temperature data of the temperature-controllable test box 401 in the simulation test platform transmitted by the temperature control device 413, receiving outer surface temperature data of the oil-immersed current transformer test article 402 detected by the outer surface temperature detection device 426 and receiving internal temperature data of the oil-immersed current transformer test article 402 detected by the test article internal temperature detection device 427. According to a pre-stored temperature comparison algorithm, after the temperature data of the temperature-controllable test box 401 and the external surface temperature data of the simulation test sample 402 are compared and calculated, and the temperature data of the temperature-controllable test box 401 and the internal temperature data of the simulation test sample 402 are compared and calculated, the temperature detection result and the comparison calculation result are converted into data and transmitted to the information processing module 440.
The information processing module 440 is connected to the insulation performance detecting device 428 and the discharge signal detecting device 429 in a single direction, and is configured to receive data detected by the insulation performance detecting device 428 and the discharge signal detecting device 429. The information processing module 440 is respectively connected to the current generating device 411 and the voltage generating device 412 in a bidirectional manner, and is configured to receive current and voltage data of the current generating device 411 and the voltage generating device 412 during the operation of the simulation test platform, and control the start and stop of the voltage generating device 412 and the current generating device 411 according to a built-in judgment algorithm thereof, so as to meet the requirement of power failure detection of the insulation performance detecting device 428. The information processing module 440 is connected to the temperature comparison module 470 in a single direction, and is configured to receive the temperature detection result and the comparison calculation data transmitted by the temperature comparison module 470. The information processing module 440 is connected to the temperature control device 413 in a unidirectional manner, and is configured to send an adjustment and control command to the temperature control device 413 according to the comparison calculation data transmitted by the temperature comparison module 470.
The information output module B450 is unidirectionally connected with the information processing module 440, and is configured to output the simulation test information.
The reminding module 460 is connected to the information processing module 440 in a single direction, and is used for outputting reminding information, where the reminding information is used for prompting the start and stop of the voltage generating device 412 and the current generating device 411 so as to meet the requirement of electrical detection of the insulation performance detecting device 428.
In this embodiment, the reminding information sent by the reminding module 460 at least includes: the voltage generator 412 and the current generator 411 are prompted to stop working, the test box door of the temperature-controllable test box 401 can be safely opened, and the detection is allowed to be performed by using a detector for gas dissolved in oil, a withstand voltage detector for insulating oil, an oil-water separation detector for insulating oil, an insulation resistance tester, a dielectric loss factor tester and the like in the insulating performance monitoring device 428. It is also indicated that the insulation performance monitoring device 428 has completed the test, the voltage generating device 412 and the current generating device 411 have been activated, the platform is in working condition, and the tester is not accessible.
Claims (4)
1. A low-temperature characteristic research system of an oil-immersed current transformer based on expert comprehensive judgment is characterized by comprising a defect troubleshooting system (100), an expert comprehensive judgment system (200), a parameter testing device (300), a simulation test platform and a monitoring system (400) thereof;
the defect checking system (100) is a defect checking system of the oil-immersed current transformer, and the system checks the defect cause of the oil-immersed current transformer according to the historical test result, the diagnosis test result and the disassembly process of the oil-immersed current transformer to be checked; the parameter testing device (300) is used for testing the electrical parameters of the oil-immersed current transformer to be checked and comprises a workstation, a temperature regulating device, an electrical parameter detecting instrument and a testing electrode; the simulation test platform and the monitoring system (400) thereof are used for simulating the operating characteristics of the oil-immersed current transformer in the low-temperature environment, the simulation test platform selects the oil-immersed current transformer entity equipment as a simulation test sample, and the operating condition of the oil-immersed current transformer is simulated in the low-temperature environment and the temperature change process and under the rated operating condition;
the expert comprehensive judgment system (200) comprises a data entry unit (210), a defect matching unit (220), a simulation test setting unit (230), a comprehensive judgment unit (240), a defect equivalent calculation unit (250) and an output unit (260); the defect matching unit (220) is pre-stored with typical structure of the oil-immersed current transformer and data of typical defects of the oil-immersed current transformer;
the defect troubleshooting system (100) is respectively connected with the data entry unit (210) and the comprehensive judgment unit (240) in a one-way mode, and transmits the structural information and the defect troubleshooting data of the oil-immersed current transformer to be debugged to the data entry unit (210) and the comprehensive judgment unit (240); the data entry unit (210) is sequentially and unidirectionally connected with the defect matching unit (220) and the simulation test setting unit (230); after the data entry unit (210) combs the structure information and the defect checking data, the defect checking data are transmitted to the defect matching unit (220); the defect matching unit (220) matches the structure information and the defect troubleshooting data with the typical structure of the built-in oil-immersed current transformer and the typical defects thereof in a matching manner, and then transmits the simulation test requirements to the simulation test setting unit (230);
the simulation test setting unit (230) is sequentially and unidirectionally connected with the simulation test platform and the monitoring system (400) thereof and the comprehensive judgment unit (240), and the simulation test setting unit (230) sets a simulation test control strategy according to the received simulation test requirement and transmits the simulation test control strategy to the simulation test platform and the monitoring system (400) thereof; the simulation test platform and the monitoring system (400) thereof utilize simulation test samples to carry out simulation tests on the operating characteristics of the oil-immersed current transformer in the low-temperature environment, and transmit simulation test data to the comprehensive judgment unit (240); the simulation test setting unit (230) is further connected with the parameter testing device (300) and the comprehensive judgment unit (240) in sequence in a one-way mode, the simulation test setting unit (230) transmits the parameter testing requirements to the parameter testing device (300), and after the parameter testing device (300) conducts testing, the parameter testing results are transmitted back to the comprehensive judgment unit (240);
the comprehensive judgment unit (240) is sequentially connected with the defect equivalent calculation unit (250) and the defect matching unit (220) in a one-way mode; after receiving the information transmitted by the comprehensive judgment unit (240), the defect equivalent calculation unit (250) constructs a defect equivalent model of the oil-immersed current transformer to be checked, and feeds back the calculation result to the defect matching unit (220) to complete the expansion of the typical structure and the typical defects of the oil-immersed current transformer;
the comprehensive judgment unit (240) and the defect equivalence calculation unit (250) are respectively connected with the output unit (260) in a one-way mode, and the output unit (260) is used for outputting a comprehensive judgment result.
2. The oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment according to claim 1, wherein the defect troubleshooting system (100) at least comprises an information input module A (110), a test testing device (120), a sample detection device (130), a central processing module (140), a disassembly process recording module (150), a defect diagnosis module (160) and an information output module A (170);
the information input module A (110) is unidirectionally connected with the central processing module (140) and the disassembly process recording module (150), the information input module A (110) transmits the structural information, defect performance and historical test data of the oil-immersed current transformer to be checked to the central processing module (140), and transmits the structural information of the oil-immersed current transformer to be checked to the disassembly process recording module (150); the testing device (120) is connected with the central processing module (140) in a one-way mode and used for transmitting the testing result of the testing device (120) to the central processing module (140); the sample detection device (130) is connected with the disassembly process recording module (150) in a bidirectional mode, and photographs are taken for the disassembly process and detects the taken sample according to the disassembly and investigation steps of the oil-immersed current transformer to be investigated, which are pre-stored in the disassembly process recording module (150), and the photographed photographs and sample detection information are fed back to the disassembly process recording module (150); the disassembly process recording module (150) is connected with the defect diagnosis module (160) and the information output module A (170) in a one-way mode, the disassembly process recording module (150) transmits the integrated disassembly information to the defect diagnosis module (160), and the defect diagnosis module (160) gives the defect cause of the oil-immersed current transformer to be checked after analysis and diagnosis and transmits the defect cause to the information output module A (170).
3. The oil immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment according to claim 1, wherein the simulation test platform and the monitoring system (400) thereof comprise a control device (410), a detection device (420), an information input module B (430), an information processing module (440), an information output module B (450), a reminding module (460) and a temperature comparison module (470), and the oil immersed current transformer operation characteristic simulation test platform in the low-temperature environment at least comprises a controllable temperature test box (401) and an oil immersed current transformer entity device placed in the controllable temperature test box (401) and used as a simulation test sample (402);
the control device (410) is used for regulating and controlling the test current, the test voltage and the test temperature of the oil-immersed current transformer operating characteristic simulation test platform in the low-temperature environment; the detection device (420) is used for testing and detecting the insulation performance of the simulation test article (402).
4. The oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment according to claim 1, wherein the receiving of the information transmitted by the comprehensive judgment unit (240) by the equivalence calculating unit (250) comprises: the structure information and the defect troubleshooting data obtained by the defect troubleshooting system (100), the simulation test data obtained by the simulation test platform and the monitoring system (400) thereof, and the parameter test data obtained by the parameter test device (300).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828296.6A CN113552434B (en) | 2021-07-21 | 2021-07-21 | Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828296.6A CN113552434B (en) | 2021-07-21 | 2021-07-21 | Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113552434A true CN113552434A (en) | 2021-10-26 |
| CN113552434B CN113552434B (en) | 2022-06-24 |
Family
ID=78104008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110828296.6A Active CN113552434B (en) | 2021-07-21 | 2021-07-21 | Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113552434B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006024800A (en) * | 2004-07-09 | 2006-01-26 | Aichi Electric Co Ltd | Oil-immersed transformer remaining life/anomaly diagnostic system |
| CN103245861A (en) * | 2013-05-03 | 2013-08-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer fault diagnosis method based on Bayesian network |
| CN203881897U (en) * | 2014-04-04 | 2014-10-15 | 内蒙古电力（集团）有限责任公司内蒙古超高压供电局 | Device for measuring insulating state of capacitive current transformer |
| CN104979908A (en) * | 2015-06-25 | 2015-10-14 | 云南电网有限责任公司电力科学研究院 | Substation network online failure analysis method |
| CN110609187A (en) * | 2019-09-21 | 2019-12-24 | 厦门加华电力科技有限公司 | Intelligent management system based on SF6 electrical equipment data detection and intelligent analysis |
| WO2020010281A1 (en) * | 2018-07-06 | 2020-01-09 | Schneider Electric USA, Inc. | Systems and methods for analyzing and optimizing dynamic tolerance curves |
| CN111856381A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Disassembling and defect checking method of oil-immersed upright current transformer |
| CN111856379A (en) * | 2020-06-24 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer operating characteristic simulation test platform and monitoring system in low-temperature environment |
| CN111856380A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Oil-immersed upright current transformer defect checking system |
| CN112101592A (en) * | 2020-09-08 | 2020-12-18 | 中国电力科学研究院有限公司 | Power secondary device defect diagnosis method, system, device and storage medium |
| CN112116243A (en) * | 2020-09-17 | 2020-12-22 | 南方电网海南数字电网研究院有限公司 | Electrical equipment defect management system based on AHP and remote support |
| US20210025939A1 (en) * | 2018-03-06 | 2021-01-28 | Maschinenfabrik Reinhausen Gmbh | System, method and computer programme product for detecting physical variables of at least one component of a tap-changing transformer and for monitoring the components of a tap-changing transformer |
| CN112485581A (en) * | 2020-10-19 | 2021-03-12 | 广东电网有限责任公司中山供电局 | Zero sequence current transformer and secondary circuit detection device and method thereof |
| KR102235237B1 (en) * | 2021-01-22 | 2021-04-02 | 유호전기공업주식회사 | Method and apparatus for editing data for testing operation of partial discharge diagnostic system |
| CN112858804A (en) * | 2020-12-25 | 2021-05-28 | 广西交控智维科技发展有限公司 | Power supply screen fault diagnosis method and device for railway vehicle |
-
2021
- 2021-07-21 CN CN202110828296.6A patent/CN113552434B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006024800A (en) * | 2004-07-09 | 2006-01-26 | Aichi Electric Co Ltd | Oil-immersed transformer remaining life/anomaly diagnostic system |
| CN103245861A (en) * | 2013-05-03 | 2013-08-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer fault diagnosis method based on Bayesian network |
| CN203881897U (en) * | 2014-04-04 | 2014-10-15 | 内蒙古电力（集团）有限责任公司内蒙古超高压供电局 | Device for measuring insulating state of capacitive current transformer |
| CN104979908A (en) * | 2015-06-25 | 2015-10-14 | 云南电网有限责任公司电力科学研究院 | Substation network online failure analysis method |
| US20210025939A1 (en) * | 2018-03-06 | 2021-01-28 | Maschinenfabrik Reinhausen Gmbh | System, method and computer programme product for detecting physical variables of at least one component of a tap-changing transformer and for monitoring the components of a tap-changing transformer |
| WO2020010281A1 (en) * | 2018-07-06 | 2020-01-09 | Schneider Electric USA, Inc. | Systems and methods for analyzing and optimizing dynamic tolerance curves |
| CN110609187A (en) * | 2019-09-21 | 2019-12-24 | 厦门加华电力科技有限公司 | Intelligent management system based on SF6 electrical equipment data detection and intelligent analysis |
| CN111856379A (en) * | 2020-06-24 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer operating characteristic simulation test platform and monitoring system in low-temperature environment |
| CN111856381A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Disassembling and defect checking method of oil-immersed upright current transformer |
| CN111856380A (en) * | 2020-07-27 | 2020-10-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Oil-immersed upright current transformer defect checking system |
| CN112101592A (en) * | 2020-09-08 | 2020-12-18 | 中国电力科学研究院有限公司 | Power secondary device defect diagnosis method, system, device and storage medium |
| CN112116243A (en) * | 2020-09-17 | 2020-12-22 | 南方电网海南数字电网研究院有限公司 | Electrical equipment defect management system based on AHP and remote support |
| CN112485581A (en) * | 2020-10-19 | 2021-03-12 | 广东电网有限责任公司中山供电局 | Zero sequence current transformer and secondary circuit detection device and method thereof |
| CN112858804A (en) * | 2020-12-25 | 2021-05-28 | 广西交控智维科技发展有限公司 | Power supply screen fault diagnosis method and device for railway vehicle |
| KR102235237B1 (en) * | 2021-01-22 | 2021-04-02 | 유호전기공업주식회사 | Method and apparatus for editing data for testing operation of partial discharge diagnostic system |
Non-Patent Citations (2)
| Title |
|---|
| SHAMSODINTAHERI 等: "Modeling and simulation of transformer loading capability and hot spot temperature under harmonic conditions", 《ELECTRIC POWER SYSTEMS RESEARCH》 * |
| 王春芸: "继电保护二次回路状态检测与评估", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅱ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113552434B (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106199305B (en) | Underground coal mine power supply system dry-type transformer insulation health state evaluation method | |
| CN103105568B (en) | Aging and the local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating | |
| CN103901072B (en) | Method for diagnosing equipment overheating defects by utilizing infrared spectrum analysis | |
| CN101464235B (en) | Test method and apparatus for polymer power cable insulation accelerated electric tree aging | |
| CN111781476A (en) | Transformer dry-type casing defect simulation and performance state monitoring system and method | |
| CN109357766A (en) | Defect of transformer equipment detection method and defect detecting system based on infrared measurement of temperature | |
| CN111458612A (en) | State monitoring and defect simulation system for electrical insulation performance of oil-immersed sleeve | |
| CN107294492A (en) | The fault detect alignment system of battery panel in a kind of large-sized photovoltaic array | |
| CN213240383U (en) | Partial discharge measuring device for electric branch test | |
| CN111856379B (en) | Monitoring system of current transformer operating characteristic simulation test platform in low-temperature environment | |
| WO2023284127A1 (en) | Vibration-signal-based online monitoring system for gil defects, and method | |
| CN103698668A (en) | Evaluation method of insulation aging state of oiled paper insulation electrical equipment based on Havriliak-Negami model | |
| CN106324444A (en) | Transformer test platform | |
| CN117218495A (en) | Risk detection method and system for electric meter box | |
| CN115792724A (en) | Uninterrupted diagnosis method for transformer bushing fault | |
| CN113552434B (en) | Oil-immersed current transformer low-temperature characteristic research system based on expert comprehensive judgment | |
| CN105807176B (en) | Laboratory simulation test device and test method for electrical equipment online detection device | |
| CN104515956B (en) | A kind of intelligent electric energy meter power module detection method and device | |
| CN112082930A (en) | Method for diagnosing aging state of solid insulation of transformer | |
| CN107884737A (en) | The live capacitive apparatus on-line monitoring check system and method for wireless high-precise synchronization | |
| CN204758022U (en) | Movable high pressure combined electrical apparatus state diagnostic device | |
| CN115127912A (en) | Composite cable joint fatigue fracture life evaluation method based on multi-source information fusion | |
| CN111856380B (en) | Oil-immersed upright current transformer defect checking system | |
| CN201993928U (en) | Device for simulating heating fault defect of high-voltage electric equipment | |
| CN110082633A (en) | A kind of grounding net of transformer substation on-line monitoring system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |