CN110136931B - Energy-saving transformer top water cooling device and control method thereof - Google Patents
Energy-saving transformer top water cooling device and control method thereof Download PDFInfo
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- CN110136931B CN110136931B CN201910487107.6A CN201910487107A CN110136931B CN 110136931 B CN110136931 B CN 110136931B CN 201910487107 A CN201910487107 A CN 201910487107A CN 110136931 B CN110136931 B CN 110136931B
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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
- H01F27/12—Oil 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
- H01F27/16—Water cooling
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Abstract
The application discloses an energy-saving transformer top water cooling device and a control method thereof, wherein the water cooling device comprises a top heat dissipation interlayer, a heat insulation water tank, a cooling water inlet pipe and a cooling water outlet pipe, wherein the top heat dissipation interlayer is communicated with the heat insulation water tank through the cooling water inlet pipe and the cooling water outlet pipe; according to the control method, the water cooling device is controlled to ensure reliable operation through comprehensive analysis and judgment of the oil temperature and the oil level in the shell of the water cooling device and the water level, the water pressure and the water temperature monitoring number of the heat insulation water tank. The embodiment of the application can greatly improve the cooling efficiency of the transformer and effectively utilize the energy generated by the loss of the transformer; when the solar energy shielding device is used outdoors, the top heat dissipation interlayer can play a role in shielding solar radiation and absorbing solar energy.
Description
Technical Field
The application relates to the technical field of transformer heat dissipation, in particular to an energy-saving transformer top water cooling device and a control method thereof.
Background
Power transformers are important voltage transformation and power transmission equipment in substations. During the voltage conversion and energy transmission process, the transformer itself will consume energy to generate no-load and load loss. In short, the transformer no-load loss is the core loss generated by establishing a magnetic field to realize voltage conversion, and the transformer load loss is the winding wire resistance loss generated by transmitting energy. For a 110kV 50000kVA three-coil transformer, no-load loss is about 40kW, load loss is about 200kW, and the energy consumption is huge because the transformer consumes about 5760 degrees of electric energy in one full load day.
In the prior art, a finned radiator of a transformer is mounted on the side surface of an oil tank of the transformer and is communicated with the oil tank of the transformer through an upper oil inlet pipe and a lower oil return pipe. The transformer oil is heated by the heat generated during the operation of the transformer, and the heated transformer oil expands to float on the top of the transformer oil tank and further enters the top of the radiator; after the heat is radiated by the radiator, the temperature and the density of hot oil are reduced and the hot oil flows back into the transformer through the oil return pipe at the lower part. The heat generated by the transformer can be dissipated by the circulation. Through analysis, hot oil on the top of the transformer enters the radiator only through the upper oil inlet pipe, and the hot oil entering the radiator is only partial hot oil on the top of the transformer but far from all hot oil; after hot oil enters the finned heat sink, the area of the hot oil layer is only a small section of the upper part of the finned heat sink, not the whole heat sink. Therefore, the efficiency of heat dissipation by the plate radiator is low.
Therefore, how to fully utilize the heat of the transformer oil tank which is quickly dissipated and how to fully utilize the heat dissipated by the transformer oil tank become problems to be solved by those skilled in the art.
Disclosure of Invention
The application provides an energy-saving transformer top water cooling device and a control method thereof, and aims to solve the problems that heat generated by energy consumption of a power transformer cannot be fully utilized and a side-mounted finned radiator is low in efficiency in the prior art.
In a first aspect, the application provides an energy-saving transformer top water cooling device, which comprises a top heat dissipation interlayer, a heat insulation water tank, a cooling water inlet pipe and a cooling water outlet pipe; the top heat dissipation interlayer is arranged at the upper end of the transformer oil tank;
the top heat dissipation interlayer comprises a water cooling device shell and a cooling water pipe, wherein the cooling water pipe consists of a plurality of S-shaped sub water pipes;
the cooling water pipe is arranged in the water cooling device shell, the vertical height of a water inlet of the cooling water pipe is lower than that of a water outlet, the slope side view of the cooling water pipe is uniformly lifted along a certain slope, transformer oil is arranged in the water cooling device shell, and the volume of the transformer oil is smaller than the volume in the water cooling device shell; an oil temperature gauge and an oil level gauge are arranged in the water cooling device shell; the transformer oil submerges the cooling water pipe;
the water cooling device shell comprises a shell body and a cover plate, and the shell body and the cover plate are detachably connected;
a tap water inlet pipe is arranged at the lower end of the heat insulation water tank; a first valve is arranged on the tap water inlet pipe; a domestic water pipe and a drainage and exhaust pipe are arranged at the upper part of the heat-insulation and heat-preservation water tank, a second valve is arranged on the domestic water pipe, a third valve is arranged on the drainage and exhaust pipe, and a pressure limiting valve is arranged on the upper end surface of the heat-insulation and heat-preservation water tank;
one end of the cooling water inlet pipe is connected with an inlet of a cooling water pipe in the water cooling device shell, and the other end of the cooling water inlet pipe is communicated with the lower end face of the heat insulation water tank; one end of the cooling water outlet pipe is connected with an outlet of a cooling water pipe of the water cooling device shell, and the other end of the cooling water outlet pipe penetrates through the lower end face of the heat insulation water tank and extends to the upper part of the heat insulation water tank; a fourth valve is arranged on the cooling water inlet pipe, and a fifth valve is arranged on the cooling water outlet pipe;
a water level meter, a water pressure meter and a water temperature meter are arranged in the heat insulation and preservation water tank;
the height from the lower end surface of the heat insulation and preservation water tank to the ground is larger than the height from the upper end surface of the water cooling device shell to the ground.
Further, the cover plate is detachably connected with the shell body through a sealing rubber ring and a bolt.
Furthermore, the water cooling device also comprises an emergency water replenishing pipe, one end of the emergency water replenishing pipe is communicated with the lower end face of the heat insulation and heat preservation water tank, and the other end of the emergency water replenishing pipe is communicated with a fire pool in the transformer substation; a sixth valve is arranged on the emergency water replenishing pipe;
the tap water inlet pipe is provided with a tap water pressure tester, the tap water pressure tester is arranged at one end of the first valve, which is far away from the heat insulation and preservation water tank.
In a second aspect, the present application provides a control method for a top water cooling device of an energy-saving transformer, where the control method includes:
acquiring the water level of a water tank measured by a water level meter, and acquiring the water pressure measured by a water pressure meter;
under the normal operation condition, the fourth valve, the fifth valve, the first valve and the second valve are in an open state, and the pressure limiting valve, the sixth valve and the third valve are in a closed state;
judging whether the water level of the water tank is smaller than a preset water level or not, and judging whether the water pressure is not smaller than the rated water pressure of tap water or not;
if the water level of the water tank is lower than the preset water level and the water pressure is not lower than the rated water pressure of tap water, controlling the third valve to open;
if the water level of the water tank is not less than the preset water level and the water pressure is not greater than the rated water pressure of the tap water, controlling a third valve to close;
judging whether the water pressure is greater than the action value of the pressure limiting valve;
if the water pressure is greater than the action value of the pressure limiting valve, the pressure limiting valve is controlled to release pressure;
if the water pressure is less than the action value of the pressure limiting valve, the pressure limiting valve is controlled to be closed;
acquiring the oil level measured by an oil level gauge;
judging whether the oil level is lower than a first preset oil level or not, and if the oil level is lower than the preset oil level, giving an alarm to prompt that oil needs to be supplemented or oil leakage inspection is carried out;
judging whether the oil level is higher than a second preset oil level, and if the oil level is higher than the second preset oil level, giving an alarm to prompt the detection of the sealing property of the cooling water pipe;
acquiring the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter;
judging whether the water temperature at the upper part of the heat insulation and preservation water tank is greater than the preset water temperature or not;
if the water temperature at the upper part of the heat insulation and preservation water tank is higher than the preset water temperature, a third valve is opened, and hot water is discharged;
acquiring the oil temperature measured by an oil temperature meter;
judging whether the oil temperature is greater than a preset oil temperature or not, and judging whether the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter is greater than or equal to the preset water temperature or not;
if the oil temperature is greater than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is greater than or equal to the preset water temperature, opening a third valve;
and if the oil temperature is higher than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is lower than the preset water temperature, the alarm prompt needs to check the fourth valve and the fifth valve to confirm the opening and confirm whether the low-temperature freezing condition exists.
Further, the control method further includes:
judging whether the water level of the water tank is smaller than a preset water level, judging whether a first valve is opened, and judging whether the water pressure is smaller than the rated water pressure of tap water;
if the water level of the water tank is lower than the preset water level, the first valve is opened, and the water pressure is lower than the rated water pressure of tap water, the sixth valve is opened, and the first valve is closed;
acquiring the tap water pressure measured by a tap water pressure tester, and judging whether the tap water pressure is not less than the rated tap water pressure;
and if the water pressure of the tap water is not less than the rated water pressure of the tap water, closing the sixth valve and opening the first valve.
According to the embodiment, the energy-saving transformer top water cooling device and the control method thereof provided by the application comprise a top heat dissipation interlayer, a heat insulation and heat preservation water tank, a cooling water inlet pipe and a cooling water outlet pipe, wherein the top heat dissipation interlayer is communicated with the heat insulation and heat preservation water tank through the cooling water inlet pipe and the cooling water outlet pipe; according to the control method, the water cooling device is controlled to ensure reliable operation through comprehensive analysis and judgment of the oil temperature and the oil level in the shell of the water cooling device and the water level, the water pressure and the water temperature monitoring number of the heat insulation water tank. The embodiment of the application can greatly improve the cooling efficiency of the transformer and effectively utilize the energy generated by the loss of the transformer; when the solar energy shielding device is used outdoors, the top heat dissipation interlayer can play a role in shielding solar radiation and absorbing solar energy.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a transformer top water cooling device according to an embodiment of the present disclosure;
fig. 2 is a top view of a cover plate provided in an embodiment of the present application;
fig. 3 is a top view of a cooling water pipe provided in an embodiment of the present application.
Illustration of the drawings:
the system comprises a top heat dissipation interlayer, a 2 heat insulation and preservation water tank, a 21 tap water inlet pipe, a 211 first valve, a 22 domestic water pipe, a 221 second valve, a 23 drainage and exhaust pipe, a 231 third valve, a 24 pressure limiting valve, a 3 cooling water inlet pipe, a 31 fourth valve, a 4 cooling water outlet pipe, a 41 fifth valve, a 5 transformer oil tank, a 6 water cooling device shell, 61 transformer oil, a 62 cover plate, a 63 sealing rubber ring, a 64 bolt, a 65 emergency water replenishing pipe, a 651 sixth valve and a 7 cooling water pipe, wherein the top heat dissipation interlayer is arranged at the top of the system, the 2 heat insulation and preservation water tank is arranged at the top of the system, the 21 tap water inlet pipe is arranged at the bottom of the system, the 211 first valve is arranged at the top of the system, the 22 domestic water pipe, the 221 second valve, the 23 drainage and exhaust pipe, the 231 third valve, the 24 pressure limiting valve, the 3 cooling water inlet pipe, the 31 fourth valve, the 4 cooling water outlet pipe, the 41 fifth valve, the 5 transformer oil tank, the 6 water cooling device shell, the 61-transformer oil, the 62-cover plate, the 63-sealing rubber ring, the 64-bolt, the 65-emergency water replenishing pipe, the emergency water replenishing pipe and the 7-cooling water pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the application provides an energy-saving transformer top water cooling device, which comprises a top heat dissipation interlayer 1, a heat insulation water tank 2, a cooling water inlet pipe 3 and a cooling water outlet pipe 4; in order to improve the heat dissipation efficiency, the top heat dissipation interlayer 1 is arranged at the upper end of the transformer oil tank 5; the top heat dissipation interlayer 1 and the transformer oil tank 5 are isolated by the metal steel plate and are not communicated with each other.
Specifically, the side wall of the water cooling device shell 6 may be formed by welding metal steel plates. The cooling water pipe 7 is a high heat conduction metal pipe. The heat insulation and preservation water tank 2 is a sealed heat preservation metal box.
The top heat dissipation interlayer 1 comprises a water cooling device shell 6 and a cooling water pipe 7, and as shown in fig. 3, the cooling water pipe 7 consists of a plurality of S-shaped sub water pipes;
in order to increase the heat dissipation area of the top hot oil and improve the heat dissipation efficiency, an S-shaped bent and bypassing cooling water pipe for absorbing heat is arranged in the water cooling device shell 6.
Condenser tube 7 sets up inside water cooling plant casing 6, for the circulation flow after being heated of water, and the vertical height of condenser tube 7's water inlet is less than the vertical height of delivery port, and condenser tube 7's slope looks sideways at along the even lifting of certain slope.
Cooling water is introduced into the cooling water pipe 7, so that heat dissipated from the transformer oil tank can be taken away.
The heat-insulating and heat-preserving water tank 2 can provide cooling water for the cooling water pipe 7, and the cooling water in the cooling water pipe 7 can circularly flow into the heat-insulating and heat-preserving water tank 2 after being heated for further utilization.
In order to collect the heat of the transformer, the distance from the lower end surface of the heat insulation and preservation water tank 2 to the ground is larger than the distance from the upper end surface of the water cooling device shell 6 to the ground. The transformer oil 61 is arranged in the water cooling device shell 6, and the volume of the transformer oil 61 is smaller than the volume of the water cooling device shell 6;
specifically, in order to avoid the problems of leakage, corrosion, and the like caused by direct heat transfer of the cooling water, the transformer oil 61 is provided in the water cooling device case 6, the cooling water pipe 7 is immersed in the transformer oil 61, and the transformer oil 61 serves as a heat transfer medium between the transformer oil tank and the cooling water. In addition, the volume of the transformer oil 61 is smaller than the volume inside the water cooling device shell 6, that is, the transformer oil 61 does not occupy the space inside the water cooling device shell 6, and a certain space is provided between the upper end surface of the transformer oil 61 and the upper end surface inside the water cooling device shell 6, so that the volume change of the transformer oil 61 after thermal expansion and cold contraction can be compensated.
An oil temperature gauge and an oil level gauge are arranged in the water cooling device shell 6; the transformer oil 61 submerges the cooling water pipe 7;
specifically, the lower end of the oil temperature gauge can be immersed in the upper portion of the transformer oil 61 for detecting the oil temperature condition. The oil level indicator may be disposed inside the water cooling device housing 6 or outside the water cooling device housing 6, and may reflect the oil level of the transformer oil 61.
It should be noted that both the oil temperature gauge and the oil level gauge can be electronic gauges with pointers, and are suspended on the transformer oil tank, so that the operation and the inspection are convenient. The structures and the using methods of the oil temperature gauge and the oil level gauge are relatively mature technologies, and are not described in detail herein.
The water cooling device housing 6 includes a housing body and a cover plate 62, and the housing body and the cover plate 62 are detachably connected so as to check the internal condition.
Further, the cover plate 62 is detachably connected to the housing body by a sealing rubber ring 63 and a bolt 64.
As shown in FIG. 2, for the convenience of maintenance, the top of the water cooling device shell 6 adopts a cover plate structure with a sealing rubber ring 63 and a bolt 64 for fastening and sealing.
A tap water inlet pipe 21 is arranged at the lower end of the heat insulation water tank 2; a first valve 211 is arranged on the tap water inlet pipe 21; a domestic water pipe 22 and a drainage and exhaust pipe 23 are arranged at the upper part of the heat-insulation and heat-preservation water tank 2, a second valve 221 is arranged on the domestic water pipe, a third valve 231 is arranged on the drainage and exhaust pipe 23, and a pressure limiting valve 24 is arranged on the upper end surface of the heat-insulation and heat-preservation water tank 2;
the water source in the heat insulation and preservation water tank 2 is from a tap water inlet pipe 21 and is automatically supplemented by the water pressure of tap water. The heat insulation and preservation water tank 2 is connected with a drainage and exhaust pipe 23 and a domestic water pipe 22, and the domestic water pipe 22 can reuse the heated cooling water, so that heat loss and waste of heat energy are avoided.
One end of the cooling water inlet pipe 3 is connected with an inlet of a cooling water pipe 7 in the water cooling device shell, and the other end of the cooling water inlet pipe 3 is communicated with the lower end face of the heat insulation water tank 2; one end of the cooling water outlet pipe 4 is connected with an outlet of a cooling water pipe 7 of the water cooling device shell, and the other end of the cooling water outlet pipe 4 penetrates through the lower end face of the heat insulation and heat preservation water tank 2 and extends to the upper part of the heat insulation and heat preservation water tank 2 so that hot water can be conveniently gathered on the upper part of the heat insulation and heat preservation water tank 2; a fourth valve 31 is arranged on the cooling water inlet pipe 3, and a fifth valve 41 is arranged on the cooling water outlet pipe 4;
the vertical height of any position of the cooling water outlet pipe 4 on the path is not lower than the height of the water outlet pipe of the top heat dissipation interlayer 1, so that hot water can be conveniently gathered.
A water level meter, a water pressure meter and a water temperature meter are arranged in the heat insulation and preservation water tank 2;
specifically, the water level gauge is used for detecting the water level condition in the heat-insulating and heat-preserving water tank 2, and the water temperature gauge is used for detecting the upper water temperature condition of water in the heat-insulating and heat-preserving water tank 2. The water level gauge may be an internal float. The water level meter and the water temperature meter can be electronic meters with pointers. The water pressure meter is used for measuring the water pressure in the heat insulation and preservation water tank 2, and the structures and the using methods of the water level meter, the water pressure meter and the water temperature meter are all the prior art, so the details are not repeated herein.
In implementation, if there is a winding outgoing line on the top of the transformer tank, the water cooling device housing 6 is provided with corresponding holes to facilitate outgoing lines of windings of the transformer. In order to bring the efficiency of the water cooling device shell 6 into play and facilitate the arrangement of the heat insulation and preservation water tank 2 and the water pipe, when the transformer is in an underground type or an oil tank side outlet mode, the water cooling device has the best effect.
Further, the water cooling device further comprises an emergency water replenishing pipe 65, one end of the emergency water replenishing pipe 65 is communicated with the lower end face of the heat insulation and heat preservation water tank 2, and the other end of the emergency water replenishing pipe 65 is communicated with a fire pool in the transformer substation; a sixth valve 651 is arranged on the emergency water replenishing pipe 65;
the emergency water replenishing pipe 65 can be used for replenishing water under the condition of tap water supply interruption, the emergency water replenishing pipe 65 is communicated with a fire pool in a transformer substation, and water in the fire pool in the transformer substation is extracted for cooling under the emergency condition.
Tap water inlet pipe 21 is provided with the tap water pressure tester, the setting of tap water pressure tester is in the one end of thermal-insulated holding water box 2 is kept away from to first valve 211, tap water pressure tester is arranged in measuring the tap water pressure in the tap water inlet pipe 21.
The application provides a control method of a transformer top water cooling device, which comprises the following steps:
according to the embodiment of the application, the water level, the water pressure and the oil level of the water tank and the water temperature and the oil temperature on the upper portion of the heat insulation and preservation water tank are controlled through the valve, the heat dissipation efficiency of the transformer is improved, and meanwhile, the energy generated by the loss of the transformer can be fully utilized.
Controlling the water level of the water tank:
acquiring the water level of a water tank measured by a water level meter, and acquiring the water pressure measured by a water pressure meter;
under the normal operation condition, the fourth valve, the fifth valve, the first valve and the second valve are in an open state, and the pressure limiting valve, the sixth valve and the third valve are in a closed state;
judging whether the water level of the water tank is smaller than a preset water level or not, and judging whether the water pressure is not smaller than the rated water pressure of tap water or not;
if the water level of the water tank is smaller than the preset water level and the water pressure is not smaller than the rated water pressure of tap water, the third valve is controlled to be opened to exhaust air if the heat-insulation water tank is judged to have gas;
if the water level of the water tank is not less than the preset water level and the water pressure is not greater than the rated water pressure of tap water, judging that the water pressure is normal, and controlling a third valve to close;
controlling the water pressure:
judging whether the water pressure is greater than the action value of the pressure limiting valve;
if the water pressure is greater than the action value of the pressure limiting valve, the pressure limiting valve is controlled to release pressure;
if the water pressure is less than the action value of the pressure limiting valve, the pressure limiting valve is controlled to be closed;
specifically, when the water pressure is greater than the action value of the pressure limiting valve, the pressure limiting valve acts to release pressure; when the water pressure is smaller than the action value of the pressure limiting valve, the pressure limiting valve is closed; the pressure limiting valve action value can be set to 1.5 times of water pressure.
Controlling the oil level;
acquiring the oil level measured by an oil level gauge;
judging whether the oil level is lower than a first preset oil level or not, if so, judging that the heat dissipation interlayer leaks oil, and alarming to prompt that oil needs to be supplemented or oil leakage inspection needs to be carried out;
judging whether the oil level is higher than a second preset oil level, if so, judging that the heat dissipation interlayer leaks water, and giving an alarm to prompt the detection of the sealing property of the cooling water pipe;
specifically, the second preset oil level is 1.2 times of the preset oil level.
Controlling the water temperature at the upper part of the heat insulation and preservation water tank:
acquiring the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter;
judging whether the water temperature at the upper part of the heat insulation and preservation water tank is greater than the preset water temperature or not;
if the water temperature at the upper part of the heat insulation and heat preservation water tank is higher than the preset water temperature, the water temperature in the heat insulation and heat preservation water tank is judged to be overheated, and the domestic water cannot consume hot water, then the third valve is opened, the hot water is discharged, and cold water is supplemented.
Controlling the oil temperature:
acquiring the oil temperature measured by an oil temperature meter;
judging whether the oil temperature is greater than a preset oil temperature or not, and judging whether the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter is greater than or equal to the preset water temperature or not;
if the oil temperature is greater than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is greater than or equal to the preset water temperature, indicating that the domestic water cannot consume the hot water, opening a third valve to drain the hot water and supplement cold water;
and if the oil temperature is greater than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is lower than the preset water temperature, judging that the water circulation is not smooth, and alarming and prompting to check whether the fourth valve and the fifth valve are opened or not and to confirm whether the low-temperature freezing condition exists or not.
According to the embodiment of the application, the instruction of the running state of the water cooling device is output through comprehensive analysis and judgment of the oil temperature, the oil level, the water temperature, the water level of the water tank and the water pressure, and the control of the water cooling device is realized.
Further, the control method further includes:
specifically, the water cooling device can further comprise an emergency water replenishing pipe, and the emergency water replenishing pipe is used for ensuring that the heat insulation and heat preservation water tank does not stop supplying water to the cooling water pipe when needed.
Judging whether the water level of the water tank is smaller than a preset water level, judging whether a first valve is opened, and judging whether the water pressure is smaller than the rated water pressure of tap water;
if the water level of the water tank is lower than the preset water level, the first valve is opened, and the water pressure is lower than the rated water pressure of tap water, the judgment is that the cooling water is cut off, the first valve is closed, the fire pool is started to supply water, and the sixth valve is opened;
acquiring the tap water pressure measured by a tap water pressure tester, and judging whether the tap water pressure is not less than the rated tap water pressure;
and if the water pressure of the tap water is not less than the rated water pressure of the tap water, judging that the cooling water is recovered to supply water, closing the sixth valve, opening the first valve, and recovering the cooling water to supply water.
According to the embodiment, the energy-saving transformer top water cooling device and the control method thereof provided by the application comprise a top heat dissipation interlayer, a heat insulation and heat preservation water tank, a cooling water inlet pipe and a cooling water outlet pipe, wherein the top heat dissipation interlayer is communicated with the heat insulation and heat preservation water tank through the cooling water inlet pipe and the cooling water outlet pipe; according to the control method, the water cooling device is controlled to ensure reliable operation through comprehensive analysis and judgment of the oil temperature and the oil level in the shell of the water cooling device and the water level, the water pressure and the water temperature monitoring number of the heat insulation water tank. The embodiment of the application can greatly improve the cooling efficiency of the transformer and effectively utilize the energy generated by the loss of the transformer; when the solar energy shielding device is used outdoors, the top heat dissipation interlayer can play a role in shielding solar radiation and absorbing solar energy.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (5)
1. The energy-saving transformer top water cooling device is characterized by comprising a top heat dissipation interlayer (1), a heat insulation water tank (2), a cooling water inlet pipe (3) and a cooling water outlet pipe (4);
the top heat dissipation interlayer (1) is arranged at the upper end of the transformer oil tank (5);
the top heat dissipation interlayer (1) comprises a water cooling device shell (6) and a cooling water pipe (7), wherein the cooling water pipe (7) consists of a plurality of S-shaped sub water pipes;
the cooling water pipe (7) is arranged inside the water cooling device shell (6), the vertical height of a water inlet of the cooling water pipe (7) is lower than that of a water outlet, the gradient side of the cooling water pipe (7) is regarded as being uniformly lifted along a certain gradient, transformer oil (61) is arranged inside the water cooling device shell (6), and the volume of the transformer oil (61) is smaller than the volume inside the water cooling device shell (6); an oil temperature gauge and an oil level gauge are arranged in the water cooling device shell (6); the transformer oil (61) submerges the cooling water pipe (7);
the water cooling device shell (6) comprises a shell body and a cover plate (62), and the shell body is detachably connected with the cover plate (62);
a tap water inlet pipe (21) is arranged at the lower end of the heat insulation water tank (2); a first valve (211) is arranged on the tap water inlet pipe (21); a domestic water pipe (22) and a drainage and exhaust pipe (23) are arranged at the upper part of the heat-insulation and heat-preservation water tank (2), a second valve (221) is arranged on the domestic water pipe, a third valve (231) is arranged on the drainage and exhaust pipe (23), and a pressure limiting valve (24) is arranged on the upper end surface of the heat-insulation and heat-preservation water tank (2);
one end of the cooling water inlet pipe (3) is connected with an inlet of a cooling water pipe (7) in the water cooling device shell, and the other end of the cooling water inlet pipe (3) is communicated with the lower end face of the heat insulation water tank (2); one end of the cooling water outlet pipe (4) is connected with an outlet of a cooling water pipe (7) of the water cooling device shell, and the other end of the cooling water outlet pipe (4) penetrates through the lower end face of the heat insulation and preservation water tank (2) and extends to the upper part of the heat insulation and preservation water tank (2); a fourth valve (31) is arranged on the cooling water inlet pipe (3), and a fifth valve (41) is arranged on the cooling water outlet pipe (4);
a water level meter, a water pressure meter and a water temperature meter are arranged in the heat insulation and preservation water tank (2);
the height from the lower end surface of the heat insulation and preservation water tank (2) to the ground is greater than the height from the upper end surface of the water cooling device shell (6) to the ground;
the control method of the transformer top water cooling device comprises the following steps:
acquiring the water level of a water tank measured by a water level meter, and acquiring the water pressure measured by a water pressure meter;
under the normal operation condition, the fourth valve, the fifth valve, the first valve and the second valve are in an open state, and the pressure limiting valve, the sixth valve and the third valve are in a closed state;
judging whether the water level of the water tank is smaller than a preset water level or not, and judging whether the water pressure is not smaller than the rated water pressure of tap water or not;
if the water level of the water tank is lower than the preset water level and the water pressure is not lower than the rated water pressure of tap water, controlling the third valve to open;
if the water level of the water tank is not less than the preset water level and the water pressure is not greater than the rated water pressure of the tap water, controlling a third valve to close;
judging whether the water pressure is greater than the action value of the pressure limiting valve;
if the water pressure is greater than the action value of the pressure limiting valve, the pressure limiting valve is controlled to release pressure;
if the water pressure is less than the action value of the pressure limiting valve, the pressure limiting valve is controlled to be closed;
acquiring the oil level measured by an oil level gauge;
judging whether the oil level is lower than a first preset oil level or not, and if the oil level is lower than the preset oil level, giving an alarm to prompt that oil needs to be supplemented or oil leakage inspection is carried out;
judging whether the oil level is higher than a second preset oil level, and if the oil level is higher than the second preset oil level, giving an alarm to prompt the detection of the sealing property of the cooling water pipe;
acquiring the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter;
judging whether the water temperature at the upper part of the heat insulation and preservation water tank is greater than the preset water temperature or not;
if the water temperature at the upper part of the heat insulation and preservation water tank is higher than the preset water temperature, a third valve is opened, and hot water is discharged;
acquiring the oil temperature measured by an oil temperature meter;
judging whether the oil temperature is greater than a preset oil temperature or not, and judging whether the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter is greater than or equal to the preset water temperature or not;
if the oil temperature is greater than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is greater than or equal to the preset water temperature, opening a third valve;
and if the oil temperature is higher than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is lower than the preset water temperature, the alarm prompt needs to check the fourth valve and the fifth valve to confirm the opening and confirm whether the low-temperature freezing condition exists.
2. The energy-saving transformer top water cooling device is characterized in that the cover plate (62) is detachably connected with the shell body through a sealing rubber ring (63) and a bolt (64).
3. The energy-saving transformer top water cooling device according to claim 1, further comprising an emergency water replenishing pipe (65), wherein one end of the emergency water replenishing pipe (65) is communicated with the lower end face of the heat insulation and preservation water tank (2), and the other end of the emergency water replenishing pipe (65) is communicated with a fire pool in a transformer substation; a sixth valve (651) is arranged on the emergency water replenishing pipe (65);
tap water inlet tube (21) are provided with the tap water pressure tester, the tap water pressure tester sets up the one end of thermal-insulated holding water box (2) is kept away from in first valve (211).
4. A control method of an energy-saving transformer top water cooling device is applied to the transformer top water cooling device of any one of claims 1-3, and is characterized by comprising the following steps:
acquiring the water level of a water tank measured by a water level meter, and acquiring the water pressure measured by a water pressure meter;
under the normal operation condition, the fourth valve, the fifth valve, the first valve and the second valve are in an open state, and the pressure limiting valve, the sixth valve and the third valve are in a closed state;
judging whether the water level of the water tank is smaller than a preset water level or not, and judging whether the water pressure is not smaller than the rated water pressure of tap water or not;
if the water level of the water tank is lower than the preset water level and the water pressure is not lower than the rated water pressure of tap water, controlling the third valve to open;
if the water level of the water tank is not less than the preset water level and the water pressure is not greater than the rated water pressure of the tap water, controlling a third valve to close;
judging whether the water pressure is greater than the action value of the pressure limiting valve;
if the water pressure is greater than the action value of the pressure limiting valve, the pressure limiting valve is controlled to release pressure;
if the water pressure is less than the action value of the pressure limiting valve, the pressure limiting valve is controlled to be closed;
acquiring the oil level measured by an oil level gauge;
judging whether the oil level is lower than a first preset oil level or not, and if the oil level is lower than the preset oil level, giving an alarm to prompt that oil needs to be supplemented or oil leakage inspection is carried out;
judging whether the oil level is higher than a second preset oil level, and if the oil level is higher than the second preset oil level, giving an alarm to prompt the detection of the sealing property of the cooling water pipe;
acquiring the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter;
judging whether the water temperature at the upper part of the heat insulation and preservation water tank is greater than the preset water temperature or not;
if the water temperature at the upper part of the heat insulation and preservation water tank is higher than the preset water temperature, a third valve is opened, and hot water is discharged;
acquiring the oil temperature measured by an oil temperature meter;
judging whether the oil temperature is greater than a preset oil temperature or not, and judging whether the water temperature at the upper part of the heat insulation and preservation water tank measured by a water temperature meter is greater than or equal to the preset water temperature or not;
if the oil temperature is greater than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is greater than or equal to the preset water temperature, opening a third valve;
and if the oil temperature is higher than the preset oil temperature and the water temperature at the upper part of the heat insulation and preservation water tank measured by the water thermometer is lower than the preset water temperature, the alarm prompt needs to check the fourth valve and the fifth valve to confirm the opening and confirm whether the low-temperature freezing condition exists.
5. The method for controlling the top water cooling device of the energy-saving transformer as claimed in claim 4, further comprising:
judging whether the water level of the water tank is smaller than a preset water level, judging whether a first valve is opened, and judging whether the water pressure is smaller than the rated water pressure of tap water;
if the water level of the water tank is lower than the preset water level, the first valve is opened, and the water pressure is lower than the rated water pressure of tap water, the sixth valve is opened, and the first valve is closed;
acquiring the tap water pressure measured by a tap water pressure tester, and judging whether the tap water pressure is not less than the rated tap water pressure;
and if the water pressure of the tap water is not less than the rated water pressure of the tap water, closing the sixth valve and opening the first valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910487107.6A CN110136931B (en) | 2019-06-05 | 2019-06-05 | Energy-saving transformer top water cooling device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910487107.6A CN110136931B (en) | 2019-06-05 | 2019-06-05 | Energy-saving transformer top water cooling device and control method thereof |
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| CN110136931A CN110136931A (en) | 2019-08-16 |
| CN110136931B true CN110136931B (en) | 2021-11-19 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206961636U (en) * | 2017-06-15 | 2018-02-02 | 天津滨海新区大港圣益油脂有限公司 | A kind of water-circulating cooling device of transformer oil |
| CN207149372U (en) * | 2017-06-25 | 2018-03-27 | 国网河南鄢陵县供电公司 | A kind of reutilization system of the waste heat of oil-filled transformer |
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2019
- 2019-06-05 CN CN201910487107.6A patent/CN110136931B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206961636U (en) * | 2017-06-15 | 2018-02-02 | 天津滨海新区大港圣益油脂有限公司 | A kind of water-circulating cooling device of transformer oil |
| CN207149372U (en) * | 2017-06-25 | 2018-03-27 | 国网河南鄢陵县供电公司 | A kind of reutilization system of the waste heat of oil-filled transformer |
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| Publication number | Publication date |
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| CN110136931A (en) | 2019-08-16 |
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