CN202331113U - Online monitoring system for air-cooling device of transformer - Google Patents
Online monitoring system for air-cooling device of transformer Download PDFInfo
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- CN202331113U CN202331113U CN2011204961226U CN201120496122U CN202331113U CN 202331113 U CN202331113 U CN 202331113U CN 2011204961226 U CN2011204961226 U CN 2011204961226U CN 201120496122 U CN201120496122 U CN 201120496122U CN 202331113 U CN202331113 U CN 202331113U
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- programmable logic
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Abstract
The utility model relates to an online monitoring system for an air-cooling device of a transformer. The online monitoring system comprises a programmable logic controller (PLC) module, wherein the PLC module is connected with a power supply monitoring module, a cooler switching monitoring module, an oil temperature acquisition module and a display module. According to the online monitoring system provided by the utility module, the cooling effect of the air-cooling device is evaluated through monitoring the oil temperature difference between inlets and outlets of coolers in operation, and then, an operator can be reminded to switch coolers with poor cooling effects in time and arrange to overhaul the coolers in fault in time, so that the aim of controlling the oil temperature of the transformer and guaranteeing the safe and stable operation of the transformer is achieved.
Description
Technical field
The utility model relates to a kind of monitoring system, is specifically related to a kind of transformer air-cooling device on-line monitoring system.
Background technology
The height of the loss situation of the cooling effectiveness of transformer cooling system, cooling system, fan and motor rotation noise, the seepage of cooling system oil situation all produce material impact to safety, the economical operation of transformer.If refrigeratory has problems, will badly influence radiating effect, the cooling effect that how to detect cooling device becomes temperature rise when guaranteeing the transformer operation can be not too high, the emphasis of safe and reliable operation.
The forced air cooler critical piece has refrigeratory body, oil-immersed pump, fan, oil purifier.Oil-immersed pump is a kind of special oily built-in motor type centrifugal pump, and the stator of motor and rotor are immersed in and make oil system constitute closed circulation system in the oil.The oil-immersed pump forced oil-circulation improves cooling effectiveness.The cooling of transformer oil is quickened in the fan blowing.The course of work of forced air cooler is after to be oil-immersed pump transformer top layer high temperature oil send in the cooling tube several times baffling, and heat is just passed to the cooling tube wall, emits heat by tube wall to air again.Meanwhile, in air side, force blowing by fan, cold air is taken away liberated heat, thereby makes deep fat quicken cooling.Cooled oil gets in the oil tank of transformer from the refrigeratory lower end again.
Transformer loss:
Transformer loss comprises the open circuit loss and the load loss of transformer.Transformer noload losses puts into operation the back with regard to exist always, not with the load-carrying size variation of transformer at transformer; Load loss then changes with the size of transformer institute on-load, with square being directly proportional of load current.Transformer loss will change heat into outwards disperses, thereby draws transformer heating and transformer oil temperature rise.Along with the rising of transformer temperature, they just have certain temperature difference to surrounding medium, thereby a part of heat is passed to surrounding medium.
The heat radiation of transformer:
What often run in the transformer heat radiation process is not single heat transfer type, but transformer oil flows through the symphyogenetic diabatic process of convection current, heat conduction and heat radiation that iron core surface, transformer oil take place when flowing through refrigeratory interior, airflow subcooler box outer surface.
The effect of air cooling equipment:
The loss that transformer winding in service and iron core produce changes heat into makes the transformer oil temperature rise through thermal convection, heat conduction and heat radiation; Transformer oil rises and gets into heating radiator; Form the natural convection of transformer oil, flowing of transformer oil quickened in the effect of oil-immersed pump again in the forced oil-circulation refrigeratory, forces the transformer oil convection current; Quicken thermal convection, give in the thermal process in the transformer oil convection current heat conduction and heat radiation are taking place simultaneously.
Summary of the invention
For solving the problems of the technologies described above; The utility model provides a kind of transformer air-cooling device on-line monitoring system; Can detect the transformer cooling device cooling effect in real time; So that can in time grasp the operation conditions of transformer air-cooling device, in time withdraw from and break down: the cooling device during like seepage oil, oil-immersed pump fault, fan failure, cooling effect decline, the safe and stable operation of assurance transformer.
The above-mentioned purpose of the utility model is to realize through such technical scheme: a kind of transformer air-cooling device on-line monitoring system; Comprise programmable logic controller (PLC) PLC module, programmable logic controller (PLC) PLC module connects Power Monitoring Unit, refrigeratory switching monitor module, oily temperature acquisition module and display module; Said Power Monitoring Unit is provided with voltage relay; Voltage relay connects two circuit breakers; Said voltage relay, isolating switch connect programmable logic controller (PLC) PLC module, and voltage relay connects the power supply that two independent is the cooling device power supply, the switching of two circuit breakers control power supply; Said refrigeratory switching monitor module is provided with switching circuit breaker, and switching circuit breaker connects programmable logic controller (PLC) PLC module; Said oil temperature acquisition module is provided with temperature sensor, and temperature sensor connects programmable logic controller (PLC) PLC module.
Said programmable logic controller (PLC) PLC module connects the PC host computer through communication module.
Said communication module adopts 485 communication modules, and said PC host computer connects programmable logic controller (PLC) PLC module through the RS-485 bus.
A kind of transformer air-cooling device on-line monitoring system of the utility model beneficial effect is following:
1), practice thrift manpower, the operations staff need not frequent field observation oil temperature, refrigeratory ruuning situation etc., outside Threshold Crossing Alert needs the on-the-spot switching of operations staff air cooling equipment, the other times operations staff production of can concentrating one's energy to be engaged in.
2), monitoring in real time, data are passed the pulpit back through data line, are convenient to the operations staff and in time grasp the firsthand information, are the repair based on condition of component accumulation data, are convenient to sum up rule, and scientific basis is provided.
3), the utility model is imported and exported the cooling effect that the oily temperature difference is assessed air cooling equipment through monitoring operating refrigeratory; In time switch the refrigeratory of cooling effect difference so that remind the operations staff; In time arrange the trouble shooting refrigeratory; Thereby reach control transformer oil temperature, guarantee the purpose of transformer safe and stable operation.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the utility model system construction drawing.
Embodiment
As shown in Figure 1, a kind of transformer air-cooling device on-line monitoring system comprises programmable logic controller (PLC) PLC module, and programmable logic controller (PLC) PLC module 1 connects Power Monitoring Unit 2, refrigeratory switching monitor module 3, oily temperature acquisition module 4 and display module 5;
Said Power Monitoring Unit 2 is provided with voltage relay; Voltage relay connects two circuit breakers; Said voltage relay, isolating switch connect programmable logic controller (PLC) PLC module 1, and voltage relay connects the power supply that two independent is the cooling device power supply, the switching of two circuit breakers control power supply; Said refrigeratory switching monitor module 3 is provided with switching circuit breaker, and switching circuit breaker connects programmable logic controller (PLC) PLC module 1; Said oil temperature acquisition module 4 is provided with temperature sensor, and temperature sensor connects programmable logic controller (PLC) PLC module 1.
Programmable logic controller (PLC) PLC module 1 connects PC host computer 7 through communication module 6.
Communication module 6 adopts 485 communication modules, and said PC host computer 7 connects programmable logic controller (PLC) PLC module 1 through the RS-485 bus.
The core of a kind of transformer air-cooling device on-line monitoring system of the utility model is a programmable logic controller (PLC) PLC module 1; Most of functions of system realize through programmable logic controller (PLC) PLC module 1; According to its function design; With PLC is core, and total system is made up of 6 functional modules, and is as shown in Figure 1.
The implementation method of each functional module and effect briefly introduce as follows:
1), Power Monitoring Unit 2: module is kept watch on the state of two-way independent current source through the small electrical potential relay, and the two-way independent current source is the cooling device power supply, judges whether phase shortage of power supply, is controlled the switching of power supplys by two isolating switchs; The power work status signal that the fault-signal and the isolating switch auxiliary node of two-way power supply reflected is sent into programmable logic controller (PLC) PLC module 1; Through the programmable logic controller (PLC) PLC module 1 comprehensive control command of judging generation control power supply switching, carry out the action of power supply switching by isolating switch.
2), refrigeratory switching monitor module 3: the running status of keeping watch on refrigeratory through the auxiliary node of gathering each refrigeratory switching circuit breaker; And data are passed to programmable logic controller (PLC) PLC module 1, open the temperature acquisition passage of corresponding refrigeratory by programmable logic controller (PLC) PLC module 1.
3), oily temperature acquisition module 4: module adopts the import and export oil temperature of temperature sensor refrigeratory to monitor in real time, and signal is delivered to programmable logic controller (PLC) PLC module 1, carries out data processing and decision-making by programmable logic controller (PLC) PLC module 1.
4), display module 5: in the various faults of control panel display power supply and forced air cooler group, drop into information such as status information, cooling effect, forced air cooler full cut-off.
5), communication module 6: communication module 6 is communicated by letter with the PC host computer 7 in a distant place through the long line stretcher of serial ports through the RS485 mouth on the PLC, and the regular operation information with transformer, refrigeratory, failure message are sent to PC host computer 7 through serial ports.
6), PC host computer 7: use Visual c++ to serial port programming, gather transformer, the operation information of refrigeratory, failure message from serial ports, realization information is at the dynamic demonstration and the fault alarm function of computing machine.
Principle of program design:
Programmable logic controller (PLC) PLC module 1 calculates transformer oil through the cooled temperature difference Δ of apparatus for supercooling T through the cooling capacity that calculates cooling device, the specified oily flow of oil-immersed pump, the thermal capacity of transformer oil etc.; And compare with the detected transformer oil out temperature of actual temperature module poor (T2-T1); Thereby detect the cooling effect of transformer cooling device; If poor (the T2-T1)＜Δ of out temperature T definite value; Explain that then this cooling device cooling effect reduces, and then should withdraw from this cooling device, and in suitable arrangement of time it checked, overhauls.
Implementation step:
The temperature sensor that is installed in refrigeratory import and export oil pipe two places is delivered to programmable logic controller (PLC) PLC module 1 with temperature signal through oil temperature transmitter; PLC carries out analytical calculation according to rule with temperature data; Analysis result utilizes communication module 6 to communicate by letter with the PC host computer 7 in a distant place through the long line stretcher of serial ports through the RS485 mouth on the PLC; The regular operation information with transformer, refrigeratory, failure message are sent to PC host computer 7 through serial ports; Make the operations staff can see the cooling effect of the cooling device of any one operation of transformer intuitively, and in time remind the operations staff to switch the relatively poor refrigeratory of cooling effect, the switching time of rational allocation refrigeratory; In time the relatively poor refrigeratory of cooling effect is overhauled; Abatement apparatus hidden danger guarantees that the temperature of transformer is unlikely too high, thereby guarantees the safe and stable operation of transformer.
Claims (4)
1. transformer air-cooling device on-line monitoring system; Comprise programmable logic controller (PLC) PLC module (1), it is characterized in that: programmable logic controller (PLC) PLC module (1) connects Power Monitoring Unit (2), refrigeratory switching monitor module (3), oily temperature acquisition module (4) and display module (5);
Said Power Monitoring Unit (2) is provided with voltage relay; Voltage relay connects two circuit breakers; Said voltage relay, isolating switch connect programmable logic controller (PLC) PLC module (1); Voltage relay connects the power supply that two independent is the cooling device power supply, the switching of two circuit breakers control power supply;
Said refrigeratory switching monitor module (3) is provided with switching circuit breaker, and switching circuit breaker connects programmable logic controller (PLC) PLC module (1);
Said oil temperature acquisition module (4) is provided with temperature sensor, and temperature sensor connects programmable logic controller (PLC) PLC module (1).
2. according to the said a kind of transformer air-cooling device on-line monitoring system of claim 1, it is characterized in that: said programmable logic controller (PLC) PLC module (1) connects PC host computer (7) through communication module (6).
3. according to the said a kind of transformer air-cooling device on-line monitoring system of claim 1; It is characterized in that: said communication module (6) adopts 485 communication modules, and said PC host computer (7) connects programmable logic controller (PLC) PLC module (1) through the RS-485 bus.
4. according to the said a kind of transformer air-cooling device on-line monitoring system of claim 1; It is characterized in that: the temperature sensor that said oil temperature acquisition module (4) is provided with is installed in refrigeratory and imports and exports the oil pipe position, and temperature signal is delivered to programmable logic controller (PLC) PLC module (1) through oil temperature transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204961226U CN202331113U (en) | 2011-12-03 | 2011-12-03 | Online monitoring system for air-cooling device of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204961226U CN202331113U (en) | 2011-12-03 | 2011-12-03 | Online monitoring system for air-cooling device of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202331113U true CN202331113U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204961226U Expired - Fee Related CN202331113U (en) | 2011-12-03 | 2011-12-03 | Online monitoring system for air-cooling device of transformer |
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| CN (1) | CN202331113U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267662A (en) * | 2014-10-17 | 2015-01-07 | 云南电网公司电力科学研究院 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
| CN106783036A (en) * | 2016-12-14 | 2017-05-31 | 内蒙古工业大学 | A kind of power transformer forced oil-circulated air-cooled system |
| CN107769363A (en) * | 2017-12-06 | 2018-03-06 | 国家电网公司 | The apparatus and method that forced oil-circulation air-cooled transformer cooler is thrown by force |
| CN112103040A (en) * | 2020-09-18 | 2020-12-18 | 青岛罗德环境科技有限公司 | Cooling monitoring system and method for transformer |
-
2011
- 2011-12-03 CN CN2011204961226U patent/CN202331113U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267662A (en) * | 2014-10-17 | 2015-01-07 | 云南电网公司电力科学研究院 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
| CN104267662B (en) * | 2014-10-17 | 2017-01-25 | 云南电网公司电力科学研究院 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
| CN106783036A (en) * | 2016-12-14 | 2017-05-31 | 内蒙古工业大学 | A kind of power transformer forced oil-circulated air-cooled system |
| CN107769363A (en) * | 2017-12-06 | 2018-03-06 | 国家电网公司 | The apparatus and method that forced oil-circulation air-cooled transformer cooler is thrown by force |
| CN112103040A (en) * | 2020-09-18 | 2020-12-18 | 青岛罗德环境科技有限公司 | Cooling monitoring system and method for transformer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121203 |