CN203799791U - SF6 spraying oil contact heat exchange type main transformer cooling device - Google Patents
SF6 spraying oil contact heat exchange type main transformer cooling device Download PDFInfo
- Publication number
- CN203799791U CN203799791U CN201420167038.3U CN201420167038U CN203799791U CN 203799791 U CN203799791 U CN 203799791U CN 201420167038 U CN201420167038 U CN 201420167038U CN 203799791 U CN203799791 U CN 203799791U
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- Prior art keywords
- oil
- transformer
- heat exchanger
- main transformer
- spray
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- Expired - Lifetime
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- 238000001816 cooling Methods 0.000 title claims abstract description 50
- 238000005507 spraying Methods 0.000 title abstract 6
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims description 77
- 239000003507 refrigerant Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 12
- 238000009529 body temperature measurement Methods 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Transformer Cooling (AREA)
Abstract
The utility model provides an SF6 spraying oil contact heat exchange type main transformer cooling device. The main transformer cooling device comprises a transformer main body and a spraying heat exchanger, wherein the transformer main body is filled with transformer cooling oil; the spraying heat exchanger is arranged on one side of the transformer main body; a spraying pipe is connected with a main transformer oil outlet through a pipeline; a transformer oil inlet is formed in the side wall at the lower part of the transformer main body; the oil outlet of the spraying heat exchanger is connected with the transformer oil inlet through a backflow pipe to realize circular backflow. By utilizing the characteristic that an SF6 medium is insoluble in transformer oil, circulation transformer oil is sprayed to reversely and directly contact low-temperature evaporable SF6 liquid for heat exchange, so that the transformer oil is cooled. Compared with the conventional main transformer cooling device, the main transformer cooling device has the great advantages of high cooling efficiency, large cooling control range, higher safety and reliability, small size, low oil consumption, low maintenance, economy and environmental friendliness in overall operation and the like; the operating situation of a main transformer is greatly improved, and the copper and iron losses of the main transformer are greatly reduced.
Description
Technical field
The utility model relates to a kind of SF
6the main transformer cooling device of spray oil contact heat-exchanging.
Background technology
main transformer is in running, due to the effect of electricity and magnetic, its coil and iron core can generate heat, and temperature is higher, main transformer operation conditions is more unfavorable, copper loss, the iron loss of main transformer are also higher, as can not be in time this heat taken away, to cause main transformer to burn the even serious accident of blast, therefore must come cooling coil and iron core by the transformer oil stream being full of in main transformer, and the heat that transformer oil stream is taken away needs to carry out heat exchange by heat abstractor, cooled cold oil stream enters main transformer body again and carries out cooling.The traditional transformer type of cooling is mainly three kinds of air blast cooling, natural air cooled and water-cooleds, although water-cooled is economical, efficiency is also high, if as there is cooling water in cooling system to Leakage in Transformer phenomenon, even minor leakage also will cause serious consequence; Air-cooled because of air heat content low, and be subject to the impact of ambient temperature, weather etc., make that low, the cooling control range of transformer Cooling efficiency is little, main transformer operation conditions is poor, and transformer, heat sink apparatus are manufactured the shortcomings such as bulky, many by oil mass, operating cost is high, maintenance is large.
Summary of the invention
The utility model improves the problems referred to above, and the technical problem to be solved in the present invention is that the existing traditional transformer type of cooling is mainly three kinds of air blast cooling, natural air cooled and water-cooleds.Although water-cooled is economical, efficiency is also high, but security performance is low, air blast cooling because of air heat content low, and be subject to the impact of ambient temperature, weather etc., make that low, the cooling control range of transformer Cooling efficiency is little, main transformer operation conditions is poor, and transformer, heat sink apparatus are manufactured the shortcomings such as bulky, many by oil mass, operating cost is high, maintenance is large.
The utility model specific embodiments is: a kind of SF
6the main transformer cooling device of spray oil contact heat-exchanging, comprises that one is positioned at the spray heat exchanger that a high position is built-in with the transformer body of transformer Cooling oil and is arranged at transformer body one side; The sidewall on described transformer body top is provided with main transformer delivery valve, and the top in described spray heat exchanger is provided with shower, and described shower is connected by pipeline with main transformer oil-out; Described spray heat exchanger bottom is provided with spray heat exchanger oil-out, and the sidewall of described transformer body bottom is provided with main transformer inlet valve, and described spray heat exchanger oil-out is connected by return duct with main transformer inlet valve.
Further, described return duct is provided with frequency conversion oil pump, and described spray heat exchanger bottom is provided with spray heat exchanger electric contact oil level indicator, and spray heat exchanger bottom oil-out is provided with spray heat exchanger and goes out solenoid.
Further, the sidewall on described spray heat exchanger top is provided with spray heat exchanger refrigerant exit, the sidewall of spray heat exchanger bottom is provided with the import of spray heat exchanger refrigerant, described spray heat exchanger refrigerant exit is connected with the import of a gas-liquid separator by the road, described gas-liquid separator top is provided with exhaust outlet, described exhaust outlet, through Refrigerating Compressor with Inverter, condenser, choke valve, is communicated with the import of heat exchanger refrigerant.
Further, described gas-liquid separator bottom is provided with leakage fluid dram, and described leakage fluid dram is connected with return duct through pipeline.
Further, described gas-liquid separator bottom is provided with gas-liquid separator electric contact oil level indicator, and gas-liquid separator outlet at bottom is also provided with separator and goes out solenoid.
Further, described main transformer oil-out is provided with out oil control valve, and described transformer body top is provided with the temperature sensor for cold oil oil temperature in measuring transformer.
Further, described main transformer cooling device also comprises control module, and described control module and temperature sensor, Refrigerating Compressor with Inverter, frequency conversion oil pump are electrically connected.
Compared with prior art, the present invention has following beneficial effect: owing to using SF
6medium, except it has good insulation, arc extinguishing, puts out combustion performance and stable physicochemical property and be insoluble to the feature of transformer oil, or a kind of good refrigerant that has higher thermal enthalpy.By SF
6as coolant media with transformer oil to spray the type of cooling directly contacting compared with traditional main transformer type of cooling, have cooling effectiveness high, can greatly improve main transformer operation conditions, significantly reduce main transformer copper loss iron loss, more safe and reliable and equipment volume is little, few by oil mass, safeguard less, the economic environmental protection of overall operation, extension device useful life etc. huge advantage, be the revolutionary character innovation of the power transformer type of cooling.
The utility model had both overcome in the middle of prior art with the main transformer of water-cooling pattern and is in operation and occurs to main transformer body seepage as cooling system, even small seepage all will produce catastrophe failure in main transformer under high voltage environment, and the serious consequence of even exploding; Overcome again prior art central with air blast cooling or natural air cooled main transformer, because air heat content is low, affected by ambient weather, make main transformer cooling effectiveness low, cooling range is narrow, main transformer operational mode is poor, and device fabrication volume is large, the shortcomings such as many by oil mass, operating cost is high, maintenance workload is large; Compared with being now widely used traditional main transformer radiating mode, the utility model has huge advantage.
Brief description of the drawings
Fig. 1 is the utility model overall structure schematic flow sheet.
Fig. 2 is the utility model transformer oil flow circulating system part-structure schematic flow sheet.
Fig. 3 is the utility model SF
6coolant circulating system Structure and Process schematic diagram.
Fig. 4 is the utility model electric contact oil level indicator control Electromagnetic Valve Circuit figure.
Fig. 5 is the utility model electric contact oil level indicator control electromagnetically operated valve main wiring diagram loop diagram.
Fig. 6 is the utility model control system functional-block diagram.
In figure: 1-transformer body, 2-main transformer winding, 3-iron core, 4-transformer oil, 5-temperature measurement on-line device, 6-main transformer delivery valve, 7-shower, 8-oil droplet, 9-oil sealing, 10-spray heat exchanger electric contact oil level indicator, 11-spray heat exchanger goes out solenoid, 12-frequency conversion oil pump, 13-main transformer inlet valve, 14-Refrigerating Compressor with Inverter, 15-condenser inlet, 16-condenser, 17-cooling blower, 18-cooler outlet, 19-choke valve, the import of 20-spray heat exchanger refrigerant, 21-sprays heat exchanger, 22-refrigerant evaporation gas, 23-spray heat exchanger refrigerant exit, the import of 24-gas-liquid separator, 25-gas-liquid separator, 26-gas-liquid separator gas outlet, 27-gas-liquid separator electric contact oil level indicator, 28-gas-liquid separator goes out solenoid.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
The utility model utilizes SF
6coolant media is insoluble to the feature of transformer oil, the SF by circulating transformer oil with spray mode and low-temperature evaporation
6medium carries out direct contact heat exchange, the SF of low-temperature evaporation
6thereby refrigerant absorbs a large amount of transformer oil heats is cooled transformer oil, reaches the object of cooling main transformer coil and iron core.
This device has mainly comprised transformer oil flow circulating system, SF
6the parts such as coolant circulating system, temperature measurement on-line device, control module.
(1) transformer oil flow circulating system:
As shown in Figure 1, transformer oil flow circulating system includes one and is built-in with the transformer body 1 of transformer Cooling oil and is arranged at the spray heat exchanger 21 of transformer body 1 one sides; The sidewall on described transformer body 1 top is provided with main transformer delivery valve 6, and the top in spray heat exchanger 21 is provided with shower 7, and described shower 7 is connected by pipeline with main transformer delivery valve 6; Described spray heat exchanger bottom is provided with spray heat exchanger oil-out, spray heat exchanger bottom is provided with spray heat exchanger electric contact oil level indicator 10, heat exchanger oil-out is provided with spray heat exchanger and goes out solenoid 11, spray heat exchanger electric contact oil level indicator 10 is electrically connected at spray heat exchanger and goes out solenoid 11, the sidewall of described transformer body 1 bottom is provided with transformer oil-in, and described spray heat exchanger oil-out is connected by return duct with change main transformer inlet valve 13.
Transformer oil by main transformer winding 2 and iron core 3 cooling after, built-in cold oil is heated to flow out through main transformer top main transformer delivery valve 6, spray heat exchanger 21 can be arranged on lower than under transformer body 1 cold oil liquid level, like this effect of deadweight potential energy downstream to spray the spray equipment in heat exchanger (also can adopt pump suction), shower 7 forms fine drop by the oil spray of high temperature and falls, with the SF of spray heat exchanger 21 interior low temperature
6the reverse contact of coolant media, oil droplet after being cooled is due to Action of Gravity Field, fall into bottom spray heat exchanger and after confluxing and flow out spray heat exchangers 21 through going out solenoid 11, the cold oil that flows out spray heat exchanger 21 enters in transformer body 1 by main transformer inlet valve 13 through frequency conversion oil pump 12, again main transformer winding 2 is carried out coolingly, circulate repeatedly with this.
Spray heat exchanger electric contact oil level indicator 10 is electrically connected at spray heat exchanger and goes out solenoid 11, control induction feedback by spray heat exchanger electric contact oil level indicator 10, in the time that oil level drops to settings, spray heat exchanger goes out solenoid 11 and cuts out, while reaching certain level height, spray heat exchanger goes out solenoid 11 to be opened again, remains that oil sealing is formed on spray heat exchanger bottom, thereby has ensured SF in spray heat exchanger
6coolant media does not lose.
(2) SF
6coolant circulating system:
As shown in Figure 2, described SF
6the coolant media circulatory system includes: frequency conversion SF
6pipeline, valve etc. that refrigerant compressor 14, condenser 16, choke valve 19, spray heat exchanger 21, gas-liquid separator 25 and system connect.
The reduce pressure SF of throttling of choke valve 19
6coolant media carries out heat exchange, SF with the reverse oil droplet contacting in spray heat exchanger 21
6after coolant media evaporation endothermic is cooling by oil droplet, the SF of heat absorption evaporation
6cold media gas is extracted out spray heat exchanger 21 by Refrigerating Compressor with Inverter 14, the SF of now heat absorption evaporation
6still with tiny oil droplet, the present invention has increased gas-liquid separator 25 for this reason.
The SF extracting out through spray heat exchanger refrigerant exit 23
6to gas-liquid separator 25, oil droplet is because Action of Gravity Field is settled down to gas-liquid separator 25 bottoms, bottom is provided with gas-liquid separator electric contact oil level indicator 27, outlet at bottom is equipped with out solenoid 28, its action principle is identical with outlet function in spray heat exchanger, gas-liquid separator electric contact oil level indicator 27 is controlled gas-liquid separator and is gone out solenoid 28, in the time that leakage fluid dram place, gas-liquid separator bottom oil level is too low, separator goes out solenoid 28 and closes, while reaching certain level height, separator goes out solenoid 28 and opens, remain that oil sealing is formed on gas-liquid separator 25 bottoms, thereby ensure SF in gas-liquid separator
6coolant media does not lose.
The oil droplet of secondary separation falls into gas-liquid separator 25 bottoms after confluxing, and squeezes into main transformer inlet valve 13 by frequency conversion oil pump 12.
SF
6after gas-liquid separator separates, be pumped down to the air entry of Refrigerating Compressor with Inverter 14, and be compressed into the SF of high pressure-temperature
6gas, high pressure-temperature SF
6gas enters condenser 16 and is condensed into high temperature SF
6liquid, high temperature SF
6liquid enters spray heat exchanger 21 after choke valve 19 expenditure and pressures, due to volume sudden enlargement, part SF
6liquid evaporation, and absorb other SF
6the heat of liquid and make whole SF
6medium temperature sharply declines, at SF
6after contacting with oil droplet in spray heat exchanger 21, absorb large gauging heat, SF
6coolant media all flashes to low-temp low-pressure gas, is pumped down to again compression in frequency-changeable compressor 14, and so circulation repeatedly.
(3) temperature measurement on-line device:
Transformer body 1 top is provided with temperature measurement on-line device, can measure in real time oil temperature in main transformer, and send temperature measurement data to control module, and described temperature measurement on-line device is electrically connected at control module.
(4) control module:
Described control module receives after the oil temperature signal that main transformer temperature measurement on-line device sends, control module is analyzed judgement by the program of design programming in advance, the work of nonstick system of control cooling system and the internal circulating load of cold oil, to ensure the cooling effect of transformer body 1 interior oil temperature.In the time that the interior oil temperature of transformer body 1 exceedes settings, control module is automatically controlled startup Refrigerating Compressor with Inverter 14 and is worked, in the time that oil temperature is higher, strengthen the operating frequency of Refrigerating Compressor with Inverter, increase is exerted oneself, and increases refrigerating capacity, also automatically controls the frequency of frequency conversion oil pump simultaneously, increase circulation of oil flow amount, to reduce main transformer oil temperature.In like manner, when oil temperature reduces, control frequency lowers, the minimizing of exerting oneself, in the time that oil temperature in main transformer drops to below settings, control module is automatically controlled and is closed Refrigerating Compressor with Inverter 14, refrigerating system quits work, and controls frequency conversion oil pump with minimum load operation (can be only to open in turn one in many frequency conversion oil pumps) simultaneously.Control module is electrically connected at temperature measurement on-line device, Refrigerating Compressor with Inverter, frequency conversion oil pump etc., and control module can be the computer processor of PLC, single-chip microcomputer or other form etc.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (7)
1. a SF
6 the main transformer cooling device of spray oil contact heat-exchanging, is characterized in that, comprises that one is positioned at the spray heat exchanger that a high position is built-in with the transformer body of transformer Cooling oil and is arranged at transformer body one side; The sidewall on described transformer body top is provided with main transformer delivery valve, and the top in described spray heat exchanger is provided with shower, and described shower is connected by pipeline with main transformer oil-out; Described spray heat exchanger bottom is provided with spray heat exchanger oil-out, and the sidewall of described transformer body bottom is provided with main transformer inlet valve, and described spray heat exchanger oil-out is connected by return duct with main transformer inlet valve.
2. a kind of SF according to claim 1
6 the main transformer cooling device of spray oil contact heat-exchanging, described return duct is provided with frequency conversion oil pump, described spray heat exchanger bottom is provided with spray heat exchanger electric contact oil level indicator, and spray heat exchanger bottom oil-out is provided with spray heat exchanger and goes out solenoid, and electric contact oil level indicator is electrically connected at out solenoid.
3. a kind of SF according to claim 2
6the main transformer cooling device of spray oil contact heat-exchanging, the sidewall on described spray heat exchanger top is provided with spray heat exchanger refrigerant exit, the sidewall of spray heat exchanger bottom is provided with the import of spray heat exchanger refrigerant, described spray heat exchanger refrigerant exit is connected with the import of a gas-liquid separator by the road, described gas-liquid separator top is provided with exhaust outlet, and described exhaust outlet is communicated with the import of heat exchanger refrigerant through Refrigerating Compressor with Inverter, condenser and choke valve.
4. a kind of SF according to claim 3
6the main transformer cooling device of spray oil contact heat-exchanging, described gas-liquid separator bottom is provided with leakage fluid dram, and described leakage fluid dram is connected with return duct through pipeline.
5. a kind of SF according to claim 4
6the main transformer cooling device of spray oil contact heat-exchanging, described gas-liquid separator bottom is provided with gas-liquid separator electric contact oil level indicator, and gas-liquid separator outlet at bottom is also provided with separator and goes out solenoid, and electric contact oil level indicator is electrically connected at out solenoid.
6. a kind of SF according to claim 5
6the main transformer cooling device of spray oil contact heat-exchanging, described main transformer oil-out is provided with out oil control valve, and described transformer body top is provided with the temperature sensor for cold oil oil temperature in measuring transformer.
7. a kind of SF according to claim 6
6the main transformer cooling device of spray oil contact heat-exchanging, described main transformer cooling device also comprises control module, described control module is electrically connected at temperature sensor, Refrigerating Compressor with Inverter, frequency conversion oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167038.3U CN203799791U (en) | 2014-04-09 | 2014-04-09 | SF6 spraying oil contact heat exchange type main transformer cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167038.3U CN203799791U (en) | 2014-04-09 | 2014-04-09 | SF6 spraying oil contact heat exchange type main transformer cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799791U true CN203799791U (en) | 2014-08-27 |
Family
ID=51381986
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420167038.3U Expired - Lifetime CN203799791U (en) | 2014-04-09 | 2014-04-09 | SF6 spraying oil contact heat exchange type main transformer cooling device |
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| Country | Link |
|---|---|
| CN (1) | CN203799791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943317A (en) * | 2014-04-09 | 2014-07-23 | 国家电网公司 | SF6 and sprayed oil contact heat exchange main transformer cooling device and using method |
-
2014
- 2014-04-09 CN CN201420167038.3U patent/CN203799791U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943317A (en) * | 2014-04-09 | 2014-07-23 | 国家电网公司 | SF6 and sprayed oil contact heat exchange main transformer cooling device and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |