CN103779048A - Main-transformation heat-dissipating device with SF6 (sulfur hexafluoride) as refrigerant medium and heat-dissipating method - Google Patents

Main-transformation heat-dissipating device with SF6 (sulfur hexafluoride) as refrigerant medium and heat-dissipating method Download PDF

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CN103779048A
CN103779048A CN201410055578.7A CN201410055578A CN103779048A CN 103779048 A CN103779048 A CN 103779048A CN 201410055578 A CN201410055578 A CN 201410055578A CN 103779048 A CN103779048 A CN 103779048A
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oil
transformer
evaporator
heat
transformer oil
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CN103779048B (en
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林晓铭
郑东升
宋仕江
林莉
郑孝章
叶雷
林舒妍
林碧莺
康建生
黄建贵
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State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Nanping Power Supply Co of State Grid Fujian Electric Power Co Ltd
Shaowu Power Supply Co of State Grid Fujian Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Nanping Power Supply Co of State Grid Fujian Electric Power Co Ltd
Shaowu Power Supply Co of State Grid Fujian Electric Power Co Ltd
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Abstract

The invention relates to a main-transformation heat-dissipating device with SF6 (sulfur hexafluoride) as a refrigerant medium and a heat-dissipating method. The main-transformation heat-dissipating device consists of a transformer oil flow circulating system and an SF6 refrigerant medium circulating system, wherein the transformer oil flow circulating system comprises a main-transformation body, an oil pump, and a transformer oil flow passage of an SF6 evaporator; the main-transformation body is filled with transformer oil for cooling a coil and an iron core; a cold oil inlet is formed in the upper part of the main-transformation body; a hot oil outlet is formed in the lower part of the main-transformation body; the oil pump conveys hot transformer oil from the hot oil outlet to an inlet of the transformer oil flow passage of the SF6 evaporator; the hot transformer oil is cooled by an SF6 refrigerant inside the SF6 refrigerant circulating system and around the transformer oil flow passage, and flows from an outlet of the transformer oil flow passage of the SF6 evaporator to the cold oil inlet. The main-transformation heat-dissipating device has huge advantages of safety, reliability, high cooling efficiency, small equipment volume, low oil consumption, less maintenance, economical overall operation and the like, and is a revolutionary innovation of a main-transformation cooling way.

Description

A kind of with SF 6for main transformer heat abstractor and the method for coolant media
Technical field
The present invention relates to a kind of with SF 6for main transformer heat abstractor and the method for coolant media.
Background technology
Main transformer is in running, due to the effect of electricity and magnetic, its coil and iron core can generate heat, 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 tradition main 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 if generation cooling water in cooling system is to main transformer Seepage, even minor leakage also will cause serious consequence; Air-cooled because air heat content is low, make main transformer cooling effectiveness low, main 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 object of the invention is to overcome the deficiencies in the prior art part, provide a kind of with SF 6for main transformer heat abstractor and the method for coolant media, can take away safe, reliable, efficient, economically the heat energy that main transformer in service produces, safety, the economical operation of powerful guarantee electric power system main transformer.
To achieve these goals, technical scheme one of the present invention is: a kind of with SF 6for the main transformer heat abstractor of coolant media, by transformer oil flow circulating system and SF 6coolant circulating system composition, described transformer oil flow circulating system comprises main transformer body, oil pump and SF 6the transformer oil stream of evaporator, in described main transformer body, be loaded with coil and iron core are carried out to cooling transformer oil, described main transformer body top is provided with cold oil import and the cold oil inlet valve for inputting cold transformer oil, described main transformer body bottom is provided with for the hot oil outlet of heat outputting transformer oil and deep fat delivery valve, and described oil pump is delivered to SF by heat transformer oil from hot oil outlet 6the transformer oil stream import of evaporator, described heat transformer oil is by SF 6in coolant circulating system, be enclosed in transformer oil stream SF around 6after refrigerant is cooling from SF 6the transformer oil flowing path outlet of evaporator flow to cold oil import.
Further, described SF 6coolant circulating system comprises SF 6refrigerant compressor, SF 6cooler, choke valve and SF 6the SF of evaporator 6refrigerant flow, described SF 6evaporator SF 6the outlet of refrigerant flow connects SF 6the import of refrigerant compressor, described SF 6the outlet of refrigerant compressor connects SF 6the import of cooler, described SF 6the outlet of cooler connects SF by choke valve 6evaporator SF 6the import of refrigerant flow.
Further, described SF 6on pipeline between the transformer oil flowing path outlet of evaporator and the cold oil import of main transformer body, oil temperature on-line measuring device is installed.
To achieve these goals, technical scheme two of the present invention is: a kind of with SF 6for the main transformer heat dissipating method of coolant media, adopt as above with SF 6for the main transformer heat abstractor of coolant media, and carry out according to the following steps: (1) opens the deep fat delivery valve of main transformer body bottom and the cold oil inlet valve on top; (2) open oil pump and SF 6coolant circulating system, transformer oil mobile in main transformer body is taken away the heat of main transformer coil and iron core generation, and transformer oil self is heated and becomes heat transformer oil, and the heat transformer oil being flowed out by deep fat delivery valve is squeezed into SF through oil pump 6the transformer oil stream of evaporator, and and SF 6in coolant circulating system, be enclosed in the transformer oil stream low temperature SF of circulation around 6refrigerant carries out heat exchange, and its heat is by low temperature SF 6refrigerant is taken away and is become cold transformer oil, and cold transformer oil comes back in main transformer main body through cold oil inlet valve, and coil and iron core are carried out to next round cool cycles.
Further, in step (2), described SF 6coolant circulating system comprises SF 6refrigerant compressor, SF 6cooler, choke valve and SF 6the SF of evaporator 6refrigerant flow, described SF 6evaporator SF 6the outlet of refrigerant flow connects SF 6the import of refrigerant compressor, described SF 6the outlet of refrigerant compressor connects SF 6the import of cooler, described SF 6the outlet of cooler connects SF by choke valve 6evaporator SF 6the import of refrigerant flow, its operation method is as follows: open SF 6refrigerant compressor, SF 6refrigerant compressor will be from SF 6evaporator SF 6refrigerant flow low pressure SF out 6gas compression becomes high pressure-temperature SF 6gas, high pressure-temperature SF 6gas enters SF 6in cooler, be cooled to high temperature SF 6liquid, high temperature SF 6liquid after choke valve expenditure and pressure cooling at SF 6evaporator SF 6in refrigerant flow, absorb the heat of heat transformer oil in transformer oil streams in a large number and flash to low pressure SF 6gas, low pressure SF 6gas is delivered to again SF 6in refrigerant compressor, compress, with this iterative cycles.
Further, described SF 6on pipeline between the transformer oil flowing path outlet of evaporator and the cold oil import of main transformer body, oil temperature on-line measuring device is installed.
Compared with prior art, the present invention has following beneficial effect: due to the SF using 6medium, it is except having good insulation, arc extinguishing, putting out combustion performance and stable physicochemical property, or a kind of good refrigerant that has higher thermal enthalpy, the type of cooling using it as refrigerant is compared with traditional main transformer type of cooling, have safe and reliable, cooling effectiveness is high, equipment volume is little, few by oil mass, safeguard less, overall operation economic dispatch huge advantage, be the revolutionary character innovation of the main transformer type of cooling.
The present invention 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 that even main transformer explodes; The shortcomings such as prior art is central because air heat content is low, makes main transformer cooling effectiveness low with air blast cooling or natural air cooled main transformer, and device fabrication volume is large, many by oil mass, operating cost is high, maintenance workload is large are overcome again; Compared with being now widely used traditional main transformer radiating mode, the present invention has huge advantage.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Accompanying drawing explanation
Fig. 1 is the transformer oil flow circulating system schematic diagram of embodiment of the present invention coiled.
Fig. 2 is the SF of embodiment of the present invention coiled 6coolant circulating system schematic diagram.
Fig. 3 be embodiment of the present invention coiled with SF 6for the main transformer dish heat abstractor schematic diagram of coolant media.
Fig. 4 is that the control module of embodiment of the present invention coiled is controlled cold oil stream temperature functional-block diagram automatically.
Fig. 5 is the SF of shell and tube 6coolant circulating system schematic diagram.
Fig. 6 is board-like SF 6coolant circulating system schematic diagram.
Fig. 7 is the schematic side view of plate-type evaporator.
Fig. 8 is the structural representation of jacket type evaporator.
In figure: 1-SF 6refrigerant compressor, 2-cooler inlet pipe, 3-SF 6cooler, 4-cooling blower, 5-cooler goes out pipe, 6-choke valve, 7-SF 6evaporator, 8-SF 6evaporation endothermic flow process, 9-evaporator SF 6refrigerant flow goes out pipe, 10-deep fat delivery valve, 11-oil pump, 12-oil pump outlet valve, 13-evaporator transformer oil stream inlet pipe, 14-SF 6the transformer oil stream of evaporator, 15-evaporator transformer oil stream goes out pipe, 16-oil temperature on-line measuring device, 17-cold oil inlet valve, 18-coil and iron core, 19-transformer oil, A-main transformer body, B-conservator, the single SF of a- 6board slot, the single oil stream of b-board slot.
Embodiment
As shown in Fig. 1 ~ 3, a kind of with SF 6for the main transformer heat abstractor of coolant media, by transformer oil flow circulating system and SF 6coolant circulating system composition, described transformer oil flow circulating system comprises main transformer body A, oil pump 11 and SF 6the transformer oil stream 14 of evaporator 7, in described main transformer body A, be loaded with coil and iron core 18 are carried out to cooling transformer oil 19, described main transformer body A top is provided with cold oil import and the cold oil inlet valve 17 for inputting cold transformer oil, described main transformer body A bottom is provided with hot oil outlet and the deep fat delivery valve 10 for heat outputting transformer oil, and described oil pump 11 is delivered to SF by heat transformer oil 19 from hot oil outlet 6 transformer oil stream 14 imports of evaporator 7, described heat transformer oil is by SF 6in coolant circulating system, be enclosed in transformer oil stream 14 SF around 6after refrigerant is cooling from SF 6 transformer oil stream 14 outlets of evaporator 7 flow to cold oil import.Wherein, the transformer oil 19 that its inside of described main transformer body A is full of mainly plays insulation and cooling effect, main transformer coil and iron core 18 are in operation because the effect of electricity, magnetic can be generated heat, and as not in time this heat taken away, will cause main transformer to burn the even serious accident of blast.
In the present embodiment, described SF 6coolant circulating system comprises SF 6 refrigerant compressor 1, SF 6cooler 3, choke valve 6 and SF 6the SF of evaporator 7 6refrigerant flow, described SF 6evaporator SF 6the outlet of refrigerant flow connects SF 6the import of refrigerant compressor 1, described SF 6the outlet of refrigerant compressor 1 connects SF 6the import of cooler 3, described SF 6the outlet of cooler 3 connects SF by choke valve 6 6evaporator SF 6the import of refrigerant flow.Wherein, described SF 6cooler 3 is forced air cooler, forces quenching by cooling blower 4, certainly SF 6cooler 3 can also be water cooler, due to SF 6in cooler 3, be SF 6media for heat exchange, therefore just in case cooling water seepage is also irrelevant etc. with main transformer oil stream.Described SF 6 transformer oil stream 14 and the SF of evaporator 7 6refrigerant flow is two medium flow process parts of isolation mutually, and transformer oil flow medium is at SF 6in evaporator 7, walk transformer oil stream 14, SF 6coolant media is at SF 6in evaporator 7, walk SF 6refrigerant flow, two circulatory systems are isolated mutually, transformer oil and SF 6refrigerant passes through SF 6the sidewall of transformer oil stream 14 in evaporator 7 (tube wall, wooden partition or shell wall) carries out heat conduction.
In the present embodiment, described SF 6 evaporator 7 is coiled, the tube side that transformer oil stream is coiled, SF 6refrigerant flow is the shell side of coiled, can also be wherein any such as shell and tube, board-like, jacket type certainly.As shown in Figure 5, work as SF 6when evaporator 7 is shell and tube, the tube side that transformer oil stream is shell and tube, SF 6refrigerant flow is the shell side of shell and tube.As shown in Fig. 6 ~ 7, work as SF 6when evaporator 7 is board-like, transformer oil stream is oil stream board slot group, SF 6refrigerant flow is SF 6board slot group, described SF 6each SF of board slot group 6board slot is overlapping with each oil stream board slot of oil stream board slot group.As shown in Figure 8, work as SF 6when evaporator 7 is jacket type, can be using main transformer body inner chamber as transformer oil stream, on main transformer body shell, weld clip cover is as SF 6refrigerant flow.
In the present embodiment, the outlet of described oil pump 11 is provided with oil pump outlet valve 12, the transformer oil stream 14 that described oil pump outlet valve 12 is connected in evaporator through evaporator transformer oil stream inlet pipe 13.Regulate cooling rate, described SF for convenient according to actual conditions 6the outlet of cooler 3 and SF 6evaporator SF 6 choke valve 6 is installed, with to high temperature SF on the pipeline between the import of refrigerant flow 6liquid carries out expenditure and pressure.For the convenient oil outlet temperature that detects transformer oil stream 14 in evaporator, described SF 6evaporator transformer oil stream between 14 outlets of transformer oil stream and the cold oil import of main transformer body A of evaporator 7 goes out on pipe 15 oil temperature on-line measuring device 16 is installed.
In the present embodiment, as shown in Figure 4, in order to facilitate intelligent automatic control, specifically electromagnetic throttle valve of described choke valve 6, specifically temperature monitor of described oil temperature on-line measuring device 16, described SF 6 evaporator 7 is interior can be provided with the inner SF of induction 6the pressure sensor of gas pressure, described SF 6specifically Refrigerating Compressor with Inverter of refrigerant compressor 1; Described temperature monitor, electromagnetic throttle valve, Refrigerating Compressor with Inverter and pressure sensor are all electrically connected at control module, described temperature monitor detects that by it evaporator transformer oil stream oil outlet temperature signal sends to control module, described control module regulates the valve opening of electromagnetic throttle valve, described Refrigerating Compressor with Inverter can be adjusted electric machine frequency automatically according to oil temperature control situation, with reasonable manner operation, described control module can be to make by technological requirement design programming the PLC or the single-chip microcomputer etc. that form.In the time that evaporator transformer oil stream oil outlet temperature is too high, the valve opening of electromagnetic throttle valve is turned in described control module control down, described SF 6evaporator evaporation pressure decreased, and then reduce SF in evaporator 6evaporating temperature is to reduce evaporator transformer oil stream oil outlet temperature, contrary conversely.In like manner, in summer and oil temperature, when high, described Refrigerating Compressor with Inverter is with high-frequency, large load condition operation, contrary conversely.
As shown in Fig. 1 ~ 3, a kind of with SF 6for the main transformer heat dissipating method of coolant media, the method adopts above-mentioned with SF 6for the main transformer heat abstractor of coolant media, and carry out according to the following steps: (1) opens the deep fat delivery valve 10 of main transformer body A bottom and the cold oil inlet valve 17 on top, open oil pump outlet valve 12; (2) open oil pump 11 and SF 6coolant circulating system, the heat that mobile transformer oil produces main transformer coil and iron core 18 in main transformer body A is taken away, and transformer oil self is heated and become heat transformer oil, and the heat transformer oil being flowed out by deep fat delivery valve 10 is squeezed into SF through oil pump 11 6the transformer oil stream 14 of evaporator 7, and and SF 6in coolant circulating system, be enclosed in the transformer oil stream 14 low temperature SF of circulation around 6refrigerant carries out heat exchange, and its heat is by low temperature SF 6refrigerant is taken away and is become cold transformer oil, and cold transformer oil comes back in main transformer main body through cold oil inlet valve 17, and coil and iron core 18 are carried out to next round cool cycles.
In the present embodiment, in step (2), described SF 6coolant circulating system comprises SF 6 refrigerant compressor 1, SF 6cooler 3, choke valve 6 and SF 6the SF of evaporator 7 6refrigerant flow, its operation method is as follows: open SF 6refrigerant compressor 1, SF 6 refrigerant compressor 1 will be from evaporator SF 6refrigerant flow goes out the low pressure SF of pipe 9 6gas compression becomes high pressure-temperature SF 6gas; Through SF 6high pressure-temperature SF after refrigerant compressor 1 compression 6gas enters SF by cooler inlet pipe 2 6in cooler 3, by cooling blower semi-finals quenching processed, by high pressure-temperature SF 6gas cooled is high temperature SF 6liquid; High temperature SF 6liquid after choke valve 6 expenditure and pressures coolings at SF 6evaporator SF 6in refrigerant flow, absorb the heat of heat transformer oil in transformer oil streams in a large number and flash to low pressure SF 6gas, low pressure SF 6gas is delivered to again SF 6compression in refrigerant compressor 1, with this iterative cycles.
In the present embodiment, in step (2), from SF 6cooler 3 high temperature SF out 6liquid flow to SF through choke valve 6 6the SF of evaporator 7 6refrigerant flow, now because volume sudden enlargement causes part high temperature SF 6liquid rotating becomes low pressure SF 6gas, liquid evaporation becomes in the process of gas can a large amount of heat absorptions and make high temperature SF 6fluid temperature sharply declines, the low temperature SF after temperature declines 6in liquid and evaporator, the mobile heat transformer oil stream of transformer oil stream 14 carries out heat exchange by sidewall, all flashes to low pressure SF after heat absorption 6gas, through evaporator SF 6refrigerant flow goes out pipe 9 and is back to SF 6the import of refrigerant compressor 1, carries out next round heat exchange circulation.
In the present embodiment, as shown in Figure 4, can, according to the real-time online data of temperature monitor, regulate electromagnetic throttle valve automatically to control evaporator SF by control module 6sF in refrigerant flow 6evaporating pressure and SF 6evaporating temperature, is controlled in the scope of setting with the oil outlet temperature of the transformer oil that guarantees to be cooled in evaporator transformer oil stream.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.

Claims (6)

1. one kind with SF 6for the main transformer heat abstractor of coolant media, it is characterized in that: by transformer oil flow circulating system and SF 6coolant circulating system composition, described transformer oil flow circulating system comprises main transformer body, oil pump and SF 6the transformer oil stream of evaporator, in described main transformer body, be loaded with coil and iron core are carried out to cooling transformer oil, described main transformer body top is provided with cold oil import and the cold oil inlet valve for inputting cold transformer oil, described main transformer body bottom is provided with for the hot oil outlet of heat outputting transformer oil and deep fat delivery valve, and described oil pump is delivered to SF by heat transformer oil from hot oil outlet 6the transformer oil stream import of evaporator, described heat transformer oil is by SF 6in coolant circulating system, be enclosed in transformer oil stream SF around 6after refrigerant is cooling from SF 6the transformer oil flowing path outlet of evaporator flow to cold oil import.
2. according to claim 1 with SF 6for the main transformer heat abstractor of coolant media, it is characterized in that: described SF 6coolant circulating system comprises SF 6refrigerant compressor, SF 6cooler, choke valve and SF 6the SF of evaporator 6refrigerant flow, described SF 6evaporator SF 6the outlet of refrigerant flow connects SF 6the import of refrigerant compressor, described SF 6the outlet of refrigerant compressor connects SF 6the import of cooler, described SF 6the outlet of cooler connects SF by choke valve 6evaporator SF 6the import of refrigerant flow.
3. according to claim 1 and 2 with SF 6for the main transformer heat abstractor of coolant media, it is characterized in that: described SF 6on pipeline between the transformer oil flowing path outlet of evaporator and the cold oil import of main transformer body, oil temperature on-line measuring device is installed.
4. one kind with SF 6for the main transformer heat dissipating method of coolant media, it is characterized in that: adopt as claimed in claim 1 with SF 6for the main transformer heat abstractor of coolant media, and carry out according to the following steps: (1) opens the deep fat delivery valve of main transformer body bottom and the cold oil inlet valve on top; (2) open oil pump and SF 6coolant circulating system, transformer oil mobile in main transformer body is taken away the heat of main transformer coil and iron core generation, and transformer oil self is heated and becomes heat transformer oil, and the heat transformer oil being flowed out by deep fat delivery valve is squeezed into SF through oil pump 6the transformer oil stream of evaporator, and and SF 6in coolant circulating system, be enclosed in the transformer oil stream low temperature SF of circulation around 6refrigerant carries out heat exchange, and its heat is by low temperature SF 6refrigerant is taken away and is become cold transformer oil, and cold transformer oil comes back in main transformer main body through cold oil inlet valve, and coil and iron core are carried out to next round cool cycles.
5. according to claim 4 with SF 6for the main transformer heat dissipating method of coolant media, it is characterized in that: in step (2), described SF 6coolant circulating system comprises SF 6refrigerant compressor, SF 6cooler, choke valve and SF 6the SF of evaporator 6refrigerant flow, described SF 6evaporator SF 6the outlet of refrigerant flow connects SF 6the import of refrigerant compressor, described SF 6the outlet of refrigerant compressor connects SF 6the import of cooler, described SF 6the outlet of cooler connects SF by choke valve 6evaporator SF 6the import of refrigerant flow, its operation method is as follows: open SF 6refrigerant compressor, SF 6refrigerant compressor will be from SF 6evaporator SF 6refrigerant flow low pressure SF out 6gas compression becomes high pressure-temperature SF 6gas, high pressure-temperature SF 6gas enters SF 6in cooler, be cooled to high temperature SF 6liquid, high temperature SF 6liquid after choke valve expenditure and pressure cooling at SF 6evaporator SF 6in refrigerant flow, absorb the heat of heat transformer oil in transformer oil streams in a large number and flash to low pressure SF 6gas, low pressure SF 6gas is delivered to again SF 6in refrigerant compressor, compress, with this iterative cycles.
According to described in claim 4 or 5 with SF 6for the main transformer heat dissipating method of coolant media, it is characterized in that: described SF 6on pipeline between the transformer oil flowing path outlet of evaporator and the cold oil import of main transformer body, oil temperature on-line measuring device is installed.
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CN104008856A (en) * 2014-05-08 2014-08-27 国家电网公司 Main transformer oil flow guide microcirculation device and using method
CN106024316A (en) * 2016-08-09 2016-10-12 胡启元 Intelligent heat-radiating transformer
CN107706783A (en) * 2017-09-29 2018-02-16 国网浙江省电力公司绍兴供电公司 A kind of device for the heating cooling of fully closed combined electric unit conductor
RU2717230C1 (en) * 2019-02-18 2020-03-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Device of sf6-water cooling of oil transformer
CN114005661A (en) * 2021-12-29 2022-02-01 深圳灏鹏科技有限公司 Optical radiation-based self-maintenance power transformer and use method thereof

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CN106024316A (en) * 2016-08-09 2016-10-12 胡启元 Intelligent heat-radiating transformer
CN107706783A (en) * 2017-09-29 2018-02-16 国网浙江省电力公司绍兴供电公司 A kind of device for the heating cooling of fully closed combined electric unit conductor
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CN114005661A (en) * 2021-12-29 2022-02-01 深圳灏鹏科技有限公司 Optical radiation-based self-maintenance power transformer and use method thereof

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