CN110853889B - Non-contact type transformer auxiliary automatic cooling system and method - Google Patents
Non-contact type transformer auxiliary automatic cooling system and method Download PDFInfo
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- CN110853889B CN110853889B CN201911175464.5A CN201911175464A CN110853889B CN 110853889 B CN110853889 B CN 110853889B CN 201911175464 A CN201911175464 A CN 201911175464A CN 110853889 B CN110853889 B CN 110853889B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/18—Liquid cooling by evaporating liquids
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Abstract
The invention discloses a non-contact type transformer auxiliary automatic cooling system and a non-contact type transformer auxiliary automatic cooling method, wherein the non-contact type transformer auxiliary automatic cooling system comprises a temperature sensor for collecting the temperature of a transformer radiator, the temperature sensor is sequentially connected with a temperature controller, a time relay, an intermediate relay and an electromagnetic water valve, the output end of the electromagnetic water valve is connected to a spray pipe through a hose, a plurality of spray heads are arranged on the spray pipe, and the spray heads face the direction of a transformer. The invention aims to provide a non-contact type transformer auxiliary automatic cooling system and a non-contact type transformer auxiliary automatic cooling method, which are used for solving the problem that auxiliary cooling measures of a transformer in the prior art are insufficient and achieving the purposes of automatic cooling and obvious cooling effect of the transformer.
Description
Technical Field
The invention relates to the field of transformer cooling, in particular to a non-contact type transformer auxiliary automatic cooling system and a non-contact type transformer auxiliary automatic cooling method.
Background
The transformer is used as the heart of the power grid, and the safe and stable operation of the transformer plays a decisive role in the safe and stable operation of the power grid. However, the transformer is often damaged by overhigh operation temperature, and overhigh operation temperature not only accelerates insulation aging and seriously reduces the service life of the transformer, but also reduces the load capacity of the transformer, influences the power supply safety, and even causes the unintended shutdown and even the lifetime damage of the transformer. The auxiliary cooling measures for the high power supply load and the high running temperature of the main transformer mainly comprise: firstly, dry ice is piled up around the transformer to reduce the temperature of the surrounding environment and accelerate the heat dissipation of the transformer, and the method has obvious cooling effect, but has higher cost and large workload; secondly, auxiliary air cooling is performed, the method for accelerating air flow has obvious auxiliary cooling effect on the refrigeration type transformer, but for the air-cooled type transformer, the method is not different from a method for adding a fan behind the fan, and is not meaningful; thirdly, water cooling is carried out manually, and the method is labor-consuming and high in danger. Therefore, the safe, effective, economic and efficient auxiliary transformer cooling method is obtained, and the method has important significance for power supply safety and high-quality service.
Disclosure of Invention
The invention aims to provide a non-contact type transformer auxiliary automatic cooling system and a non-contact type transformer auxiliary automatic cooling method, which are used for solving the problem that auxiliary cooling measures of a transformer in the prior art are insufficient and achieving the purposes of automatic cooling and obvious cooling effect of the transformer.
The invention is realized by the following technical scheme:
the non-contact transformer auxiliary automatic cooling system comprises a temperature sensor used for collecting the temperature of a transformer radiator, wherein the temperature sensor is sequentially connected with a temperature controller, a time relay, an intermediate relay and an electromagnetic water valve, the output end of the electromagnetic water valve is connected to a spray pipe through a hose, a plurality of spray heads are arranged on the spray pipe, and the spray heads face the direction of the transformer.
The invention provides a non-contact type transformer auxiliary automatic cooling system, which aims to solve the problem of insufficient transformer auxiliary cooling measures in the prior art. The time relay mainly controls the spraying time, and the phenomenon that the electromagnetic water valve generates heat to influence the service life due to long-time spraying work is avoided. The application greatly reduces the working strength of maintainers, improves the working efficiency, ensures the safety of personnel and equipment, and improves the attractiveness. This device installation convenient to use, the device starts the back can full automatic operation, has greatly reduced the construction time of maintainer at the scene, also can avoid follow-up long-term maintenance work, and effectual transformer temperature rise too high problem in summer has been solved, provides a solution thinking for the transformer cooling. This application is non-contact's cooling structure, and need not the staff operation, and efficiency is high.
Preferably, the intermediate relay is a contactor, and the contactor is used for controlling the electromagnetic water valve; the time relay is used for controlling the spraying time.
Furthermore, a first stop valve, a second stop valve and a third stop valve are sequentially arranged on the spray pipe along the upstream direction to the downstream direction, an air charging pipeline is connected between the first stop valve and the second stop valve, and the air charging pipeline is communicated with a high-pressure air source; the spray heads are positioned between the second stop valve and the third stop valve, and all the spray heads are synchronously opened and closed. Current shower, cooling water gets into the back from one end and passes through each shower nozzle blowout one by one, and in flow process pressure constantly reduces, and the shower nozzle spun water pressure of keeping away from the end of intaking more promptly can be less, is difficult to accomplish all the time that each shower nozzle evenly sprays the coolant liquid for in this application, can lead to the transformer to be close to the shower and intake one side cooling of end faster, keep away from the shower and intake one side cooling effect of end not good. Therefore, according to the scheme, the first stop valve, the second stop valve and the third stop valve are sequentially arranged on the spray pipe from the water inlet end, all the spray heads are located between the second stop valve and the third stop valve, and the air adding pipeline is connected between the first stop valve and the second stop valve, namely the air adding pipeline is arranged on the upstream of each spray head and communicated with the high-pressure air source and used for inputting high-pressure air. When the spray pipe is used specifically, the first stop valve and the second stop valve are opened, the third stop valve and each spray head are closed, and cooling water is introduced into the spray pipe; when the spray pipe is filled with cooling water, compressed air is added into the spray pipe through the air-entrapping pipeline, the pressure of the cooling water at each position in the spray pipe is rapidly balanced through the compressed air, the pressure of the cooling water can be remarkably increased through the compressed air, and when each spray head is synchronously opened, a high-pressure gas-liquid mixture is rapidly sprayed out in a pressure relief state, so that the temperature reduction of the transformer is realized. This scheme is through compressed air's letting in, has not only effectively solved each shower nozzle and has sprayed uneven problem, ensured that the cooling effect is even stable, still makes spun cooling water have bigger velocity of flow, and the more quick heat of taking away, and remaining cooling water evaporates on attaching to the transformer housing, consumes a large amount of heats once more.
Furthermore, the gas filling pipeline is positioned right above the spray pipe, and the axis of the gas filling pipeline is vertically intersected with the axis of the spray pipe. In this scheme, when the cooling water got into the air entrainment pipeline, can judge that the shower has been filled in.
Further, a pressure sensor is arranged on the inner wall of the gas filling pipeline and is positioned at the bottom end of the gas filling pipeline. The pressure sensor is located the air entrainment pipeline bottom, therefore if being filled with cooling water in the shower, because the closing of both ends valve, consequently cooling water can only get into in the air entrainment pipeline, when pressure sensor had pressure to show, shows that cooling water has crossed pressure sensor, can stop the interpolation to cooling water this moment, begins to let in compressed air. Therefore, the scheme is not only simple in position setting of the communication pipeline, but also can realize start and stop judgment among different working steps through the position setting. Meanwhile, the pressure can be monitored in real time through the arrangement of the pressure sensor, so that the addition of compressed air is controlled, and the pressure in the pipe is ensured to be within a required range.
Further, a fourth stop valve is arranged on the gas filling pipeline and located between the high-pressure gas source and the pressure sensor. When the compressed air is added and the pressure of the pressure sensor reaches a set value, the fourth stop valve is closed, and the spray head is opened when the spray is needed. In addition, residual pressure is also arranged between the fourth stop valve and the high-pressure air source, the pressure of the residual pressure is not released, after the spray head is opened, the fourth stop valve is opened, the high-pressure air left between the fourth stop valve and the high-pressure air source quickly enters the spray pipe, the line sweeping function can be firstly realized, the residual moisture in the air-entrapping pipeline and the spray pipe is blown away, the utilization rate of cooling water is improved, secondly, the air is mixed with residual cooling water and sprayed out from the spray head together to be sprayed on the transformer, and for the transformer shell which just receives a large amount of cooling water spray, a large amount of moisture is inevitably attached to the transformer shell and is evaporating, and through subsequent spraying of residual air, air is quickly swept after moisture is attached to the surface of the transformer shell, so that the evaporation rate of the evaporating moisture can be remarkably accelerated by utilizing the residual air, and more heat can be quickly taken away. Therefore, the arrangement of the scheme can utilize the waste gas to remarkably accelerate the heat dissipation effect of the cooling water, and has outstanding substantive characteristics and remarkable progress compared with the prior art.
The time relay and the intermediate relay are both positioned in the control box, the temperature sensor and the pressure sensor are both connected to the output end of the control box, and the output end of the control box is respectively connected with the electromagnetic water valve, the first stop valve, the second stop valve, the third stop valve and the fourth stop valve. The whole control of the system is realized through the control box.
The non-contact transformer auxiliary automatic cooling method comprises the following steps:
s1, a temperature sensor acquires the temperature of a transformer radiator and transmits a temperature signal to a temperature controller;
and S2, if the acquired temperature is higher than the set temperature of the temperature controller, starting an electromagnetic water valve to lead the station tap water to a spray pipe, and spraying water to the transformer shell through a spray head to cool.
And when spraying, the spraying time is controlled through a time relay, and the spraying is carried out at intervals.
The interval spraying comprises the following steps:
s301, opening the first stop valve and the second stop valve, closing the third stop valve and each spray head, and introducing cooling water into the spray pipe;
s302, when cooling water is soaked in a pressure sensor in the gas filling pipeline, closing a first stop valve and stopping water flowing into the spray pipe;
s303, adding compressed air into the spray pipe through an air-entrapping pipeline until the pressure monitored by the pressure sensor reaches a set value;
s304, closing a fourth stop valve and a second stop valve which are positioned on the gas filling pipeline;
s305, when the next spraying time is up, synchronously opening all the spray heads, and then opening a second stop valve;
s306, after the spraying is finished, repeating the steps S301 to S304 and waiting for the next spraying.
All the node steps in the method can be automatically realized through the control cabinet; in the interval spraying, the interval time of the two times of spraying can be set according to actual needs, and can be realized by all the technicians in the field.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the non-contact type transformer auxiliary automatic cooling system and the non-contact type transformer auxiliary automatic cooling method greatly reduce the working intensity of maintainers, improve the working efficiency, guarantee the safety of the maintainers and equipment and improve the attractiveness. This system installation convenient to use, the device starts the back can full automatic operation, has greatly reduced the construction time of maintainer at the scene, also can avoid follow-up long-term maintenance work, and the effectual too high problem of transformer temperature rise in summer of having solved provides a solution thinking for the transformer cooling.
2. According to the non-contact type transformer auxiliary automatic cooling system and method, the problem that spraying of all spray heads is uneven is effectively solved and the cooling effect is ensured to be even and stable through the introduction of compressed air, the sprayed cooling water has a larger flow speed, heat is taken away more quickly, the residual cooling water is attached to the transformer shell to be evaporated, and a large amount of heat is consumed again.
3. The non-contact type transformer auxiliary automatic cooling system and the non-contact type transformer auxiliary automatic cooling method remarkably accelerate the heat dissipation effect of cooling water by using waste gas.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a control loop according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a shower pipe according to an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a spray pipe, 2-a spray head, 3-a first stop valve, 4-a second stop valve, 5-a third stop valve, 6-an air-entrapping pipeline, 7-a pressure sensor, 8-a high-pressure air source, 9-a fourth stop valve and 10-a transformer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the non-contact transformer auxiliary automatic cooling system shown in fig. 1 comprises a temperature sensor used for collecting the temperature of a transformer radiator, wherein the temperature sensor is sequentially connected with a temperature controller, a time relay, an intermediate relay and an electromagnetic water valve, the output end of the electromagnetic water valve is connected to a spray pipe 1 through a hose, a plurality of spray heads 2 are arranged on the spray pipe 1, and the spray heads 2 face the direction of the transformer.
Preferably, the intermediate relay is a contactor, and the contactor is used for controlling the electromagnetic water valve; the time relay is used for controlling the spraying time.
The device has the characteristics of small volume, simple and convenient operation, arbitrary expansion of the spraying system part and suitability for transformers with various voltage grades.
Example 2:
as shown in fig. 1 and 2, on the basis of embodiment 1, a first stop valve 3, a second stop valve 4, and a third stop valve 5 are sequentially disposed on the shower pipe 1 along the upstream direction to the downstream direction, an air charging pipe 6 is connected between the first stop valve 3 and the second stop valve 4, and the air charging pipe 6 is communicated with a high-pressure air source 8; the spray head 2 is positioned between the second stop valve 4 and the third stop valve 5, and all spray heads are opened and closed synchronously. The gas filling pipeline 6 is positioned right above the spray pipe 1, and the axis of the gas filling pipeline 6 is vertically intersected with the axis of the spray pipe 1. And a pressure sensor 7 is arranged on the inner wall of the gas filling pipeline 6, and the pressure sensor 7 is positioned at the bottom end of the gas filling pipeline 6. And a fourth stop valve 9 is arranged on the gas filling pipeline 6, and the fourth stop valve 9 is positioned between the high-pressure gas source 8 and the pressure sensor 7. The automatic control device is characterized by further comprising a control box, the time relay and the intermediate relay are located in the control box, the temperature sensor and the pressure sensor 7 are connected to the output end of the control box, and the output end of the control box is connected with the electromagnetic water valve, the first stop valve 3, the second stop valve 4, the third stop valve 5 and the fourth stop valve 9 respectively.
The method for cooling by the embodiment comprises the following steps:
s1, a temperature sensor acquires the temperature of a transformer radiator and transmits a temperature signal to a temperature controller;
and S2, if the acquired temperature is higher than the set temperature of the temperature controller, starting an electromagnetic water valve to lead the station tap water to the spray pipe 1, and spraying water to the transformer shell through the spray head 2 to cool.
And when spraying, the spraying time is controlled through a time relay, and the spraying is carried out at intervals.
The interval spraying comprises the following steps:
s301, opening the first stop valve 3 and the second stop valve 4, closing the third stop valve 5 and each spray head 2, and introducing cooling water into the spray pipe 1;
s302, when cooling water is soaked in the pressure sensor 7 in the gas filling pipeline 6, closing the first stop valve 3 and stopping water introduction into the spray pipe 1;
s303, adding compressed air into the spray pipe 1 through the air-adding pipeline 6 until the pressure monitored by the pressure sensor 7 reaches a set value;
s304, closing a fourth stop valve 9 positioned on the gas filling pipeline 6 and closing a second stop valve 4;
s305, when the next spraying time is up, synchronously opening all the spray heads 2, and then opening the second stop valve 4;
s306, after the spraying is finished, repeating the steps S301 to S304 and waiting for the next spraying signal.
In the use process of the embodiment, the control box is only required to be connected with a 220V power supply, and the spray pipe interface is connected with a tap water pipe interface of a transformer substation. The sensor is arranged on the transformer fan heater, and the early-stage installation of the whole device can be realized. When the device is required to operate, the control power supply on the control box is turned on. The device automatically collects the temperature data of the transformer, compares the data and then realizes the automatic water spraying and cooling operation.
Experiments prove that after the device is used, the heat dissipation and cooling work of a 110 kV-grade transformer can be easily realized, the temperature of a common 110 kV-grade 50 MVA-capacity transformer is reduced from 80 ℃ to 60 ℃ for no more than 20 minutes, and compared with the traditional cooling method, the effect is very obvious.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The non-contact type transformer auxiliary automatic cooling system is characterized by comprising a temperature sensor for collecting the temperature of a transformer radiator, wherein the temperature sensor is sequentially connected with a temperature controller, a time relay, an intermediate relay and an electromagnetic water valve, the output end of the electromagnetic water valve is connected to a spray pipe (1) through a hose, a plurality of spray heads (2) are arranged on the spray pipe (1), and the spray heads (2) face the direction of the transformer; the intermediate relay is a contactor which is used for controlling the electromagnetic water valve; the time relay is used for controlling the spraying time; a first stop valve (3), a second stop valve (4) and a third stop valve (5) are sequentially arranged on the spray pipe (1) along the upstream direction to the downstream direction, an air-adding pipeline (6) is connected between the first stop valve (3) and the second stop valve (4), and the air-adding pipeline (6) is communicated with a high-pressure air source (8); the spray heads (2) are positioned between the second stop valve (4) and the third stop valve (5), and all the spray heads are synchronously opened and closed;
the auxiliary automatic cooling method of the non-contact transformer comprises the following steps:
s1, the temperature sensor collects the temperature of the transformer radiator and transmits a temperature signal to the temperature controller;
s2, if the collected temperature is higher than the set temperature of the temperature controller, starting an electromagnetic water valve to lead the station tap water to the spray pipe (1), and spraying water to the transformer shell through the spray head (2) to cool; during each spraying, the spraying time is controlled through a time relay, and the spraying is carried out at intervals; the interval spraying comprises the following steps:
s301, opening the first stop valve (3) and the second stop valve (4), closing the third stop valve (5) and each spray head (2), and introducing cooling water into the spray pipe (1);
s302, when cooling water submerges the pressure sensor (7) in the gas filling pipeline (6), closing the first stop valve (3) and stopping water introduction into the spray pipe (1);
s303, adding compressed air into the spray pipe (1) through the air-adding pipeline (6) until the pressure monitored by the pressure sensor (7) reaches a set value;
s304, closing a fourth stop valve (9) on the gas filling pipeline (6) and closing a second stop valve (4);
s305, when the next spraying time is up, synchronously opening all the spray heads (2), and then opening a second stop valve (4);
and S306, after the spraying is finished, repeating the steps S301 to S304 and waiting for the next spraying.
2. The non-contact transformer auxiliary automatic cooling system according to claim 1, wherein the air-entrapping pipeline (6) is located right above the shower pipe (1), and an axis of the air-entrapping pipeline (6) is vertically intersected with an axis of the shower pipe (1).
3. The non-contact transformer auxiliary automatic cooling system according to claim 2, wherein a pressure sensor (7) is arranged on the inner wall of the air charging pipeline (6), and the pressure sensor (7) is positioned at the bottom end of the air charging pipeline (6).
4. The non-contact transformer auxiliary automatic cooling system according to claim 3, wherein a fourth stop valve (9) is arranged on the air charging pipeline (6), and the fourth stop valve (9) is located between the high-pressure air source (8) and the pressure sensor (7).
5. The non-contact transformer auxiliary automatic cooling system according to claim 4, further comprising a control box, wherein the time relay and the intermediate relay are both located in the control box, the temperature sensor and the pressure sensor (7) are both connected to an output end of the control box, and an output end of the control box is respectively connected with the electromagnetic water valve, the first stop valve (3), the second stop valve (4), the third stop valve (5) and the fourth stop valve (9).
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193202A (en) * | 2016-07-07 | 2016-12-07 | 吴桂广 | Automatic spraying device |
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| ITBO20040323A1 (en) * | 2004-05-20 | 2004-08-20 | Magneti Marelli Powertrain Spa | METHOD OF DIRECT INJECTION OF FUEL INTO AN INTERNAL COMBUSTION ENGINE |
| CN2861249Y (en) * | 2005-12-15 | 2007-01-24 | 天津鼎盛工程机械有限公司 | Sprinkling control device for bituminous pavement cold recycling machine |
| CN201302898Y (en) * | 2008-10-10 | 2009-09-02 | 国网运行有限公司宜昌超高压管理处 | Converter transformer auxiliary cooling spray system |
| CN201930763U (en) * | 2011-01-13 | 2011-08-17 | 山西太钢不锈钢股份有限公司 | Pit-sludge processing device |
| CN203735456U (en) * | 2013-12-31 | 2014-07-30 | 河南中烟工业有限责任公司 | Roller-wetting water and jet compressed air pressure-stablizing system for stem presses |
| CN104393510B (en) * | 2014-10-30 | 2016-08-24 | 国网上海市电力公司 | A kind of transforming plant main transformer spray cooling device |
| CN107689285A (en) * | 2017-09-21 | 2018-02-13 | 国网河南省电力公司电力科学研究院 | A kind of automatic fast cooling device of power transformer |
| CN110158482A (en) * | 2019-06-26 | 2019-08-23 | 中交第三航务工程局有限公司 | A kind of automatic spray maintenance process of oblique pull Surveillance of Continuous Beam concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193202A (en) * | 2016-07-07 | 2016-12-07 | 吴桂广 | Automatic spraying device |
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