CN202330586U - Fully-automatic temperature-rise testing system for power transformer - Google Patents
Fully-automatic temperature-rise testing system for power transformer Download PDFInfo
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- CN202330586U CN202330586U CN2011204580614U CN201120458061U CN202330586U CN 202330586 U CN202330586 U CN 202330586U CN 2011204580614 U CN2011204580614 U CN 2011204580614U CN 201120458061 U CN201120458061 U CN 201120458061U CN 202330586 U CN202330586 U CN 202330586U
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Abstract
The utility model discloses a fully-automatic temperature-rise testing system for a power transformer. The fully-automatic temperature-rise testing system comprises a main circuit part and a control circuit part, wherein the main circuit part comprises a testing power supply, an intermediate transformer, an intelligent switch and a tested circuit transformer which are connected in sequence; and the control circuit part comprises a micro controller, an acquiring-monitoring module, a signal conditioning module, a feedback executive device module, an upper computer module and a GPRS (General Packet Radio Service) module. Compared with the prior art, the fully-automatic temperature-rise testing system for the power transformer can be used for real-time monitoring and precisely controlling the full process of the temperature-rise test of the power transformer, thus the testing precision and the testing efficiency are improved, the labor intensity of testers is lowered and the test in real time is safely, reliably and efficiently accomplished.
Description
Technical field
The utility model relates to power transformer test field, exactly is meant a kind of full automatic power transformer temperature rise test system.
Background technology
Temperature rise test is to need artificial intervention in all type approval tests of power transformer and the routine test at most, the test that holding time is the longest.Its objective is the temperature rise of Transformer Winding, iron core and transformer oil under the inspection provision state; The junction of oil, structural member, lead-in wire and sleeve pipe and lead-in wire and shunting switch has or not local overheating; Confirm that transformer reaches the hot state under the ultra nameplate load operation conditions and related parameter is arranged in the work running status.For satisfying the requirement of GB GB1094.2-1996 " temperature rise of power transformer part 2 ", transformer temperature rise test required time is longer, is generally the test period of high-power transformer even longer tens hours.And process of the test is special and complicated, needs the parameter of measurement and monitoring many, often is difficult to the warranty test accuracy, even can take place because of maloperation cause accident.
At present, domestic power transformer temperature rise test mostly is in craft or semi-automatic measuring stage, and every performance index all must be measured by instrumentation, and automatization level is low, and a little less than the protective capability, test speed is slow, and there is potential safety hazard in inefficiency; More use, maintenance and managerial inconvenience have been brought to the tester.Particularly when many power transformers need carry out temperature rise test simultaneously, need many identical instruments of configuration, cause the wasting of resources and cost to increase.
The utility model content
To above-mentioned defective; The technical matters that the utility model solves is to provide a kind of full automatic power transformer temperature rise test system; Can monitor in real time and precisely control power transformer temperature rise test overall process; Improve measuring accuracy and test efficiency, reduce reviewer's labour intensity, safe and reliable, completion test real-time and efficiently.
In order to solve above technical matters, the full automatic power transformer temperature rise test system that the utility model provides comprises main circuit part and control circuit part, wherein:
Said main circuit partly comprises experiment power supply, intermediate transformer, intelligent switch and is tried circuit transformer that said experiment power supply, intermediate transformer, intelligent switch and quilt examination circuit transformer are connected successively;
Said control circuit partly comprises microcontroller, acquisition monitoring module, signal condition module, feedback actuating unit module, upper computer module and GPRS module; Said acquisition monitoring module is connected with the signal condition module respectively with by the examination circuit transformer; Said signal condition module is connected with microcontroller; Said microcontroller is connected with communication tool through the GPRS module; Said microcontroller is connected with upper computer module through hub, and said microcontroller is through feedback actuating unit module controls experiment power supply, the said intelligent switch of said microprocessor controls.
Preferably, said control circuit part also comprises the capacitance compensation control module, and said microcontroller compensates through the primary side and the secondary side power factor of said capacitance compensation control module to middle transformer.
Preferably, said capacitance compensation control module comprises CS and capacitive compensator, and said capacitive compensator is connected the both sides of said intermediate transformer.
Preferably, said acquisition monitoring module comprises voltage-current sensor, temperature sensor, smoke detector and sound transducer.
Preferably, said feedback actuating unit module comprises drive unit and actuating unit, and said drive unit is connected with said actuating unit.
Preferably, said actuating unit is a stepper motor, and said stepper motor is connected with said experiment power supply.
Preferably, said control circuit part also comprises touch-screen display, and said touch-screen display is connected with said microcontroller.
Preferably, said control circuit part also comprises keyboard, and said keyboard is connected with said microcontroller.
Preferably, said control circuit part also comprises video monitoring, and said video monitoring is connected with said microcontroller through said hub.
Preferably, said microcontroller is the DSP microcontroller, and it uses the TMS320F2407 chip.
Compared with prior art; The full automatic power transformer temperature rise test system that the utility model provides; Can monitor in real time and precisely control power transformer temperature rise test overall process; Improve measuring accuracy and test efficiency, reduce reviewer's labour intensity, safe and reliable, completion test real-time and efficiently.
Description of drawings
Fig. 1 is the structured flowchart of full automatic power transformer temperature rise test system in the utility model.
Embodiment
For the technical scheme that those skilled in the art can understand the utility model better and provided, set forth below in conjunction with specific embodiment.
See also Fig. 1, this figure is the structured flowchart of full automatic power transformer temperature rise test system in the utility model.
The full automatic power transformer temperature rise test system that the utility model provides comprises main circuit part and control circuit part, wherein:
Main circuit partly comprises experiment power supply, intermediate transformer, intelligent switch and is tried circuit transformer that experiment power supply, intermediate transformer, intelligent switch and quilt examination circuit transformer are connected successively;
Control circuit partly comprises microcontroller, acquisition monitoring module, signal condition module, feedback actuating unit module, upper computer module and GPRS module, microprocessor controls intelligent switch.
The acquisition monitoring module is connected with the signal condition module respectively with by the examination circuit transformer, and the signal condition module is connected with microcontroller, and the acquisition monitoring module comprises voltage-current sensor, temperature sensor, smoke detector and sound transducer.
Microcontroller is connected with upper computer module through hub, and host computer is a PC, and hub is connected with the DSP microcontroller through embedded ethernet serial data modular converter iPort.The control circuit part also comprises video monitoring, and video monitoring is connected with microcontroller through hub.
Microcontroller is connected with communication tool through the GPRS module, and communication tool is a mobile phone.
Microcontroller is through feedback actuating unit module controls experiment power supply, and feedback actuating unit module comprises drive unit and actuating unit, and drive unit is connected with actuating unit, and actuating unit is a stepper motor, and stepper motor is connected with experiment power supply.
The control circuit part also comprises the capacitance compensation control module, and microcontroller compensates through the primary side and the secondary side power factor of capacitance compensation control module to middle transformer.The capacitance compensation control module comprises CS and capacitive compensator, and capacitive compensator is connected the both sides of intermediate transformer.
The control circuit part also comprises touch-screen display, and touch-screen display is connected with microcontroller.The control circuit part also comprises keyboard, and keyboard is connected with microcontroller.
Microcontroller is the DSP microcontroller, and it uses the TMS320F2407 chip, fast (the dominant frequency 40MIPS of transmission speed; For the 6-12 of common single-chip microcomputer doubly), control figure place many (56 I/O), reliability height (army's grade); Integrated level high (built-in arithmetic hardware cell, house dog, I2C, spi bus,, width modulation (PWM) passage etc.); Memory headroom big (64KFLASH+4KSRAM+8KFRAM); In the storage time long (more than 10,000 years), characteristics that can erasable repeatedly (more than 100,000 times) realize the Based Intelligent Control and algorithm execution of entire test; Gather monitoring modular and comprise voltage current transformer, temperature sensor, smoke detector, sound transducer, institute's monitor signal of gathering passes through signal condition module entering DSP microcontroller.The DSP microcontroller is the core control part of total system, the output of the collection of all signals, the communication of host computer, control signal, and the intelligent decision of accident treatment etc. all is that parts are accomplished thus.
The principle of work of the full automatic power transformer temperature rise test system that the utility model provides is following:
Voltage-current sensor is isolated high-precision hall sensor.The voltage current transformer module will through 24 external ADC chips, be converted into digital signal by the voltage and current signal of examination power transformer input end, input to DSP.Temperature acquisition adopts the multiple spot pattern, to improve the accuracy of temperature, reaches the local temperature of global monitoring test specimen, avoids the situation of local overheating.Temperature signal converts digital signal input DSP into through high-precision adc, and calculates its temperature rise value.
The DSP microcontroller reads signals such as voltage, electric current and phase place, is function with power and electric current, is function with power and electric current; With time and voltage is variable; With temperature and temperature rise rate of change is reference quantity, is foundation with the fault, sets up mathematical model; Employing is technological than power and current tracking based on adaptive control algorithm and the stagnant chain rate of STR (self-tuning regulation), thereby realizes permanent power control, constant current control, temperature rise detection and capacitance compensation control.Wherein in the permanent power control stage, when temperature rise was lower than 70% preset value, system was with the output-constant operation that exceeds the quata, and promptly temperature increases the output voltage of experiment power supply less than setting value through the adjustment stepper motor, thereby improves power, shortens test period; Vice versa.Wherein feedback control algorithm adopts the adaptive digital pid algorithm, realizes High Accuracy Control, and it is excessive to avoid overshoot occurring, and the response time optimization shortens test period simultaneously.In the permanent power control stage, when the temperature rise rate of change surpasses preset value, then be reduced to rated power, restriction temperature rise rate of change is avoided because of the excess temperature situation appears in temperature-responsive slowly the infringement test specimen.According to standard GB1092.2-1996 " temperature rise of power transformer part 2 "; When the temperature rise rate of change less than 1K/h, think that promptly test specimen is operated in steady state (SS), kept the permanent power test of total losses again three hours; Then get into the constant current control stage; With the rated current operation, kept one hour, whole procedures system is monitoring and record test product temperature information and environment temperature automatically.
When the approaching end of temperature rise test; Testing crew is reminded automatically in advance according to Preset Time by system, prepares the winding resistance test, when the time arrives; System cuts off experiment power supply automatically; Report to the police and also to preserve Test Information, simultaneously through display panel module, upload upper computer module, and GPRS telecommunication module, report test responsible official through embedded ethernet serial data modular converter IPort.In the whole service process; Voltage, electric current, power, temperature and temperature rise rate of change information are all through DSP digital processing system and specific IP agreement; Be sent to host computer and video monitoring module, upper computer detection operating system shows each item information in real time, and keeping records automatically.Above each item information shows through display panel module in real time simultaneously, makes things convenient for the field personnel to operate, move and consult information.
General power, continuous current, estimate temperature rise value, finish before reminder time isoparametric preset, the beginning of test all can be passed through scene, keyboard, host computer or remote equipment setting and control with promptly stopping to wait.
The emergency protection of system realizes through detecting smog, sound, voltage, electric current, temperature with reporting to the police: when failover produces in smog or the process of the test cacophonia, corresponding detector will detect failure message, through signal processing module; Input to the DSP microcontroller; The DSP microcontroller judges whether failover produces this information, if judge when really fault being arranged through fuzzy neural network algorithm; The timely output protection signal of DSP microcontroller cuts off experiment power supply.Wherein fuzzy neural network algorithm is the basis with the learning sample, and smog, the sound of fault generating is carried out sample learning, extracts its characteristic; Like wavelength, intensity, draw information such as its frequency spectrum, frequency peak and intensity, and give the fault judgement model its weights; The fault judgement model is according to detected information; Through weighted registration, failure judgement, this algorithm can effectively be avoided breaking because of other noises produce erroneous judgement.When voltage, electric current or temperature surpassed setting threshold, the timely output protection signal of DSP microcontroller cut off experiment power supply.
The power factor compensation of system is then through detecting the phase place of electric current and voltage, intelligent operation/cutting building-out capacitor.Thereby realize the dynamic control of power factor, improve power factor, reduce the wastage and the pollution of electrical network.
Compared with prior art, the full automatic power transformer temperature rise test system that the utility model provides has following beneficial effect:
1, function is complete, and the integrated necessary equipment of present power transformer temperature rise test has substituted many instrument and equipments such as capacitance compensation controller, power analyzer, temperature rise tester, regulator, video monitoring, reduces cost greatly.This system's output port is extendible simultaneously, can make an experiment simultaneously by many power transformers, is particularly suitable for testing agency or test center.
2, conformance with standardization, this system have solved present most equipment or instrument can only be realized constant current control, but can not carry out permanent power control simultaneously, usually needs manual intervention and judgement.Native system microcontroller basis collects voltage and current signal, rated output loss in real time, and, when departing from predetermined value, adjust experiment power supply automatically through drive unit connection topworks stepper motor, thus the realization closed-loop control.This system is according to standard GB1094.2-1996 " temperature rise of power transformer part 2 " requirement, and power transformer is carried out permanent power control earlier, stablize three hours after, carry out constant current control again, conformance with standard testing requirements fully.
3, energy-conservation and efficient is high, this system has solved the macrocyclic characteristics of present most of power transformer test period, according to standard JB/T501-2006 " power transformer test guide rule "; For shortening the temperature rise time, the method that can take to improve power input during on-test or worsen cooling condition improves temperature rapidly; When the temperature rise of keeping watch on the position reaches the temperature rise of 70% expectation, recover the specified heating and the state of cooling immediately, but the method is higher to testing crew specialized capability and experience Capability Requirement; And need constantly monitoring test product general power numerical value and temperature rise situation; Often cause the test product local overheating to be damaged or the too high erroneous judgement of whole temperature rise easily, the utility model can be monitored the temperature rise of transformer multiple spot in real time, and increases and decreases according to temperature rise rate of change intelligent decision power; Realize optimum efficiency; Shorten test period, thus saves energy, and greatly reduce professional requirement to testing crew.
4, safe and reliable, this system has carried out the hardware and software duplicate protection, when hardware comparison circuit detects overcurrent or overvoltage; Need not to judge that through software cut off the electricity supply rapidly, the accident that prevents further enlarges; Simultaneously, system has increased temperature sensor, smoke detector, sound transducer, video monitor, when the test product local temperature unusual; Or the test site smog of emerging, or the inner abnormal sound of test product such as shelf depreciation or non-testing crew get into pilot region suddenly, and system reports to the police immediately and makes intelligent decision and handle; The accident that prevents further worsens, and has improved the reliability of system greatly.
5, expandability is strong, and this system can directly be provided with isolated operation at the scene through keyboard and touch display screen; Also can expand delivery outlet, adapt to many power transformers temperature rise test simultaneously, in addition; System also can be connected with PC through hub, realizes long-range setting and monitoring, owing to introduced hub; So, can realize control of multiple pc interconnect plane and supervision.
6, measuring accuracy is high; This system realizes unified management and monitoring because integrated level is high, and image data is carried out science and handled and calculate after 16 bit A/D converters get into microcontroller; Carry out system's correction and calibration simultaneously, guaranteed measuring accuracy from the software and hardware many-side.
7, intellectuality; This system adopts based on the adaptive control algorithm of STR (self-tuning regulation) and stagnant chain rate than the power/current tracking technique; Guarantee each experimental stage conformance with standard; Precisely control, and efficiency optimizationization drops to minimum with rate of breakdown such as test product excess temperature, overheated, short circuit, electric shocks.The GPRS module that system is built-in; Regularly directed communication apparatus mobile phone to relevant staff sends trystate or failure message etc.; Make things convenient for the staff also can not keep watch on and control at the scene the time, the probability of making a mistake that greatly reduces the working strength of testing crew and cause because of fatigue.
8, automaticity is high; This system has significantly reduced manual intervention and judgement in the process of the test; Any situation for occurring in the process of the test comprises abnormal conditions; System can both make optimal selection and judgement, thereby reaches optimum control and science processing, has reduced cost of labor and has improved work efficiency.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a full automatic power transformer temperature rise test system is characterized in that, comprises main circuit part and control circuit part, wherein:
Said main circuit partly comprises experiment power supply, intermediate transformer, intelligent switch and is tried circuit transformer that said experiment power supply, intermediate transformer, intelligent switch and quilt examination circuit transformer are connected successively;
Said control circuit partly comprises microcontroller, acquisition monitoring module, signal condition module, feedback actuating unit module, upper computer module and GPRS module; Said acquisition monitoring module is connected with the signal condition module respectively with by the examination circuit transformer; Said signal condition module is connected with microcontroller; Said microcontroller is connected with communication tool through the GPRS module; Said microcontroller is connected with upper computer module through hub, and said microcontroller is through feedback actuating unit module controls experiment power supply, the said intelligent switch of said microprocessor controls.
2. full automatic power transformer temperature rise test according to claim 1 system; It is characterized in that; Said control circuit part also comprises the capacitance compensation control module, and said microcontroller compensates through the primary side and the secondary side power factor of said capacitance compensation control module to middle transformer.
3. full automatic power transformer temperature rise test according to claim 2 system is characterized in that said capacitance compensation control module comprises CS and capacitive compensator, and said capacitive compensator is connected the both sides of said intermediate transformer.
4. full automatic power transformer temperature rise test according to claim 1 system is characterized in that said acquisition monitoring module comprises voltage-current sensor, temperature sensor, smoke detector and sound transducer.
5. full automatic power transformer temperature rise test according to claim 1 system is characterized in that said feedback actuating unit module comprises drive unit and actuating unit, and said drive unit is connected with said actuating unit.
6. full automatic power transformer temperature rise test according to claim 5 system is characterized in that said actuating unit is a stepper motor, and said stepper motor is connected with said experiment power supply.
7. full automatic power transformer temperature rise test according to claim 1 system is characterized in that, said control circuit part also comprises touch-screen display, and said touch-screen display is connected with said microcontroller.
8. full automatic power transformer temperature rise test according to claim 1 system is characterized in that, said control circuit part also comprises keyboard, and said keyboard is connected with said microcontroller.
9. full automatic power transformer temperature rise test according to claim 1 system is characterized in that, said control circuit part also comprises video monitoring, and said video monitoring is connected with said microcontroller through said hub.
10. full automatic power transformer temperature rise test according to claim 1 system is characterized in that said microcontroller is the DSP microcontroller, and it uses the TMS320F2407 chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204580614U CN202330586U (en) | 2011-11-17 | 2011-11-17 | Fully-automatic temperature-rise testing system for power transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204580614U CN202330586U (en) | 2011-11-17 | 2011-11-17 | Fully-automatic temperature-rise testing system for power transformer |
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| CN202330586U true CN202330586U (en) | 2012-07-11 |
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| CN2011204580614U Expired - Fee Related CN202330586U (en) | 2011-11-17 | 2011-11-17 | Fully-automatic temperature-rise testing system for power transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565569A (en) * | 2011-11-17 | 2012-07-11 | 东莞市广安电气检测中心有限公司 | Full-automatic power transformer temperature rise test system |
| CN103954872A (en) * | 2014-05-20 | 2014-07-30 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN111337744A (en) * | 2020-04-03 | 2020-06-26 | 苏州华电电气股份有限公司 | Transformer operation energy efficiency and/or loss monitoring device |
-
2011
- 2011-11-17 CN CN2011204580614U patent/CN202330586U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565569A (en) * | 2011-11-17 | 2012-07-11 | 东莞市广安电气检测中心有限公司 | Full-automatic power transformer temperature rise test system |
| CN103954872A (en) * | 2014-05-20 | 2014-07-30 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN103954872B (en) * | 2014-05-20 | 2017-04-26 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN111337744A (en) * | 2020-04-03 | 2020-06-26 | 苏州华电电气股份有限公司 | Transformer operation energy efficiency and/or loss monitoring device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151117 |
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| EXPY | Termination of patent right or utility model |