CN112802660A - Oil-immersed transformer and transformer temperature control system - Google Patents
Oil-immersed transformer and transformer temperature control system Download PDFInfo
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- CN112802660A CN112802660A CN202110364702.8A CN202110364702A CN112802660A CN 112802660 A CN112802660 A CN 112802660A CN 202110364702 A CN202110364702 A CN 202110364702A CN 112802660 A CN112802660 A CN 112802660A
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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
- H01F27/02—Casings
- H01F27/025—Constructional details relating to 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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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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
- H01F27/085—Cooling by ambient air
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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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
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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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
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- Protection Of Transformers (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention provides an oil-immersed transformer and a transformer temperature control system, comprising: the transformer comprises a transformer body, wherein a base assembly is arranged at the bottom of the transformer body; the heat dissipation assembly is provided with a booster pump and a heat dissipation fan; through setting up out oil pipe, booster pump and S type cooling tube, be convenient for make the inside oil of oil-immersed transformer body flow, at the in-process that oil flows, through setting up air-supply line, radiator fan, radiator-grid and air outlet, be convenient for distribute the heat on S type cooling tube surface to make whole transformer have quick radiating effect. The operation rule between the operation data value and the operation average value of the oil-immersed transformer can be configured by monitoring personnel according to the actual operation state based on the requirement of the monitoring system. The calculation of each oil-immersed transformer can be uniformly processed in the system, so that the conclusion has a mutual reference value, and uniform monitoring can be realized.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an oil-immersed transformer and a transformer temperature control system.
Background
The distribution transformer is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings, and reduces 10kV or 35kV network voltage to 230/400V bus voltage used by users. The product is suitable for alternating current 50 (60) Hz, three-phase maximum rated capacity 2500kVA, and can be used indoors or outdoors.
Most of the existing distribution transformers adopt oil-immersed transformers, and in the using process of the oil-immersed transformers, oil is sealed in a special oil tank, so that the flowability of the oil is poor, and the heat dissipation of the oil-immersed transformers is not facilitated.
And because the control form and the radiating mode to oil-immersed transformer are only through the control to transformer self at present, also monitor the temperature state of transformer body, if the high temperature then cool down and handle, this kind of control mode lacks the linkage control to a plurality of distribution transformer in the distribution network, only monitor transformer body temperature, can't know the equipment state of higher and lower level, also can not follow trouble young discovery hidden danger, if the temperature of transformer body exceeds the threshold value, probably caused the influence to whole distribution network, at this moment cool down measures such as the process can influence normal power supply again.
Disclosure of Invention
The invention provides an oil-immersed transformer, which can ensure the cooling effect in the structural form, and realize the cooling of the transformer by a small rotating speed increment by adjusting the rotating speed of a cooling fan.
The method specifically comprises the following steps: the transformer comprises a transformer body, wherein a base assembly is arranged at the bottom of the transformer body;
one side of the transformer body is connected with a liquid level observation assembly; the other side of the transformer body is provided with a heat dissipation component;
the heat dissipation assembly is provided with a booster pump and a heat dissipation fan;
the input end of the booster pump is connected with an oil outlet pipe of a heat dissipation oil circuit in the transformer body through a pipeline;
the output end of the booster pump is connected to the input end of the radiating oil circuit through a radiating pipe;
the wind output direction of the heat radiation fan faces the heat radiation pipe.
It should be further noted that the heat dissipation assembly is also provided with a protection box;
the protective box is connected to the side wall of the transformer body and covers the booster pump and the radiating pipe;
the booster pump is fixedly arranged on the clapboard; two ends of the partition plate are respectively connected with the protective box and the side wall of the transformer body;
the radiating pipe penetrates out of the partition plate;
the bottom of the protective box is connected with a ventilation pipe;
the heat radiation fan is arranged in the ventilation pipe.
It should be further noted that the filter screen is detachably mounted at the air inlet of the ventilation pipe;
a heat dissipation net is arranged at the air outlet of the ventilation pipe;
the cooling fan is arranged between the filter screen and the cooling net.
It is further noted that the protective box is provided with a box door and a box wall filter screen;
the radiating pipe adopts S-shaped radiating pipe.
It is further noted that the fluid level observation assembly includes: a liquid level observation tube and a sealing cover;
the position close to the top end of the liquid level observation pipe is connected to the upper end of a heat dissipation oil circuit in the transformer body through a communication top pipe;
the position close to the bottom end of the liquid level observation pipe is connected to the lower end of a heat radiation oil path in the transformer body through a communication bottom pipe;
the top end of the liquid level observation tube is connected with the sealing cover in a threaded mode.
It is further noted that the base assembly is provided with a fixed bottom plate and a fixed beam;
the fixed bottom plate is connected with four hydraulic shock absorbers;
the four hydraulic shock absorbers are arranged on the upper surface of the fixed bottom plate in a rectangular array;
the top end of the hydraulic shock absorber is connected with the fixed beam through a fixed threaded rod and a fixed nut;
the top end of the fixed beam is connected with the transformer body.
The invention also provides a transformer temperature control system, comprising: the system comprises a plurality of oil-immersed transformers and a temperature control terminal;
the oil immersed transformer is provided with a temperature sensor for sensing the temperature of the transformer, an oil temperature sensor for sensing the oil temperature in the radiating pipe, a single chip microcomputer, a communication module, a fan control circuit and a pump control circuit; a flowmeter is arranged on the radiating pipe;
the single chip microcomputer is connected with the temperature sensor and the oil temperature sensor to acquire the running temperature information of the transformer and the oil temperature information inside the radiating pipe;
the single chip microcomputer is connected through a flowmeter to obtain the flow information of the transformer oil;
the single chip microcomputer is connected with the cooling fan through the fan control circuit and controls the cooling fan to operate;
the single chip microcomputer is connected with the booster pump through a pump control circuit to control the operation of the booster pump;
the single chip microcomputer is connected with the temperature control terminal through the communication module, sends temperature information to the temperature control terminal, receives control information sent by the temperature control terminal, and respectively controls the operation of the cooling fan and the booster pump.
It should be further noted that the temperature control terminal acquires the operating state data of each oil-immersed transformer;
the temperature control terminal analyzes whether the running state data exceeds a threshold value;
when the running state data of the transformer reaches a running state over-threshold value, the temperature control terminal respectively controls the fan motor and the booster pump to run for a preset time period under the current running state, controls the fan motor to reduce the output power at a time interval of half an hour or one hour, and controls the booster pump to improve the output power;
the temperature control terminal monitors the running state data in real time, and after the temperature control terminal continuously runs for a preset time, the temperature control terminal respectively controls the fan motor and the booster pump to recover to run at normal output power.
It should be further noted that the temperature control terminal calculates a running average value of each oil-immersed transformer in the system in each preset monitoring time period;
calculating the running data value and the running average value of each oil-immersed transformer to obtain a comparison state value;
extracting a comparative state value obtained by each oil-immersed transformer;
and judging whether the comparison state value of each oil-immersed transformer is within a normal range, if the comparison state value exceeds a preset range, possibly causing a fault, and prompting monitoring personnel.
It should be further noted that the temperature control terminal calls a comparison state value of each oil-immersed transformer, and calculates the comparison state value of each oil-immersed transformer and a preset calibration value to obtain a calibration difference value;
sorting the calibration difference values of all oil-immersed transformers according to the size;
the temperature control terminal is also used for acquiring the operation data of each oil-immersed transformer in real time and sequencing the updated calibration difference values; setting an oil-immersed transformer with the largest calibration difference value at the foremost end of the sequence, wherein the oil-immersed transformer has a larger potential fault occurrence probability compared with other oil-immersed transformers; and identifying the address code of the oil-immersed transformer at the forefront end of the sequence.
According to the technical scheme, the invention has the following advantages:
the oil-immersed transformer is convenient for oil in the oil-immersed transformer body to flow by arranging the oil outlet pipe, the booster pump and the S-shaped radiating pipe, and is convenient for radiating heat on the surface of the S-shaped radiating pipe by arranging the air inlet pipe, the radiating fan, the radiating net and the air outlet in the process of oil flowing, so that the whole transformer has a quick radiating effect.
According to the oil-immersed transformer, the fixing beam, the fixing threaded rod and the fixing nut are arranged, so that the oil-immersed transformer body can be conveniently fixed on the upper surface of the hydraulic damper, and the hydraulic damper can reduce vibration of the oil-immersed transformer body during working.
The single chip microcomputer of the transformer temperature control system is connected with the temperature control terminal through the communication module, sends temperature information to the temperature control terminal, receives control information sent by the temperature control terminal, and respectively controls the operation of the cooling fan and the booster pump. The realization carries out effectual cooling to oil-immersed transformer, carries out the linkage adjustment to fan and booster pump among the oil-immersed transformer to realize oil-immersed transformer's cooling.
In the invention, for the oil-immersed transformer, the heating condition of the oil-immersed transformer can be measured by a temperature sensor. When the operating temperature of the oil-immersed transformer exceeds the threshold value, the output power of the fan motor can be increased, and the rotating speed is increased to realize cooling. And the output power is reduced by combining with a booster pump, the transformer oil is effectively cooled and then is input into the oil-immersed transformer for cooling, and the temperature of the transformer is ensured to be within a normal range. That is to say, the temperature of the transformer is effectively controlled by acquiring the state of the cooling fan in the oil-immersed transformer, the operating state of the booster pump and the current temperature value corresponding to each temperature sensor. Realize promoting the rotational speed to compare the temperature variation in real time, confirm the transformer running state, realized accurate control, the rotational speed that also is promoted according to the target volume reduces transformer oil's flow, certainly also need to guarantee to have certain flow, guarantees the inside cooling effect of transformer, adjusts radiator fan's rotational speed, can realize oil-immersed transformer cooling with less rotational speed increment, has realized oil-immersed transformer's cooling.
According to the method and the device, operation rules between the operation data values and the operation average values of the oil-immersed transformer can be configured by monitoring personnel according to the actual operation state based on the requirements of a monitoring system. The calculation of each oil-immersed transformer can be uniformly processed in the system, so that the conclusion has a mutual reference value, and uniform monitoring can be realized.
In the invention, because the running state, the environment and the model attribute of each oil-immersed transformer are different and have different running parameters, in order to monitor uniformly and realize the comprehensive monitoring of the oil-immersed transformers, the comparison state value and the preset calibration value of each oil-immersed transformer are calculated to obtain the calibration difference value; namely, the real-time state of each oil-immersed transformer and the standard value under the normal condition of each oil-immersed transformer are calculated to obtain the calibration difference value. The operating state of each oil-immersed transformer is considered by considering the difference between the operating state of each oil-immersed transformer and the standard value under the normal condition of the oil-immersed transformer, so that the purpose of unified monitoring is achieved.
The calibration difference values of all oil-immersed transformers are sorted according to the size, monitoring personnel can know the state of the oil-immersed transformers based on the sorting result of the calibration difference values, the situation that the running conditions of the oil-immersed transformers are only considered in the running state of a single transformer is prevented, the states of the upper area and the lower area of the transformer cannot be known, and therefore the whole monitoring of a power distribution network or a power supply network can be achieved. The system is convenient for monitoring personnel to integrally control the system, and the fault occurrence probability of the power supply network is convenient.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an oil-immersed transformer;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of an embodiment of the interior of the protective case of the present invention;
fig. 4 is a schematic diagram of a transformer temperature control system.
In the figure: the device comprises a fixed bottom plate 1, a hydraulic shock absorber 2, a fixed beam 3, an oil-immersed transformer body 4, a protective box 5, an oil outlet pipe 6, a partition plate 7, a booster pump 8, a radiating pipe 9, an air inlet pipe 10, a radiating fan 11, a radiating net 12, a fixed threaded rod 13, a box door 14, a filter screen 15, a liquid level observation pipe 16, a sealing cover 17, a box wall filter screen 18, an oil-immersed transformer 21 and a temperature control terminal 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the oil-filled transformer provided by the invention, when an element or layer is referred to as being "on" or "connected" or "coupled" to another element or layer, it may be directly on, connected or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Spatially relative terms such as "under …", "below", "lower", "above", and the like, may be used in oil filled transformers provided by the present invention to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
The present invention provides an oil-immersed transformer, as shown in fig. 1 to 3, including: the transformer comprises a transformer body 4, wherein a base assembly is arranged at the bottom of the transformer body 4;
one side of the transformer body 4 is connected with a liquid level observation assembly; the other side of the transformer body 4 is provided with a heat dissipation component; the heat dissipation assembly is provided with a booster pump 8 and a heat dissipation fan 11; the input end of the booster pump 8 is connected with the oil outlet pipe 6 of the heat dissipation oil circuit in the transformer body through a pipeline; the output end of the booster pump 8 is connected to the input end of the radiating oil circuit through a radiating pipe 9; the wind output direction of the radiating fan 11 is toward the radiating pipe 9. The booster pump 8 facilitates the flow of oil inside the oil-immersed transformer body 4.
In order to improve the heat dissipation effect of the transformer and facilitate the fixed installation of the heat dissipation assembly and the booster pump 8, the heat dissipation assembly is also provided with a protective box 5; the protective box 5 can be made of plastic materials or stainless steel materials.
The protective box 5 is connected to the side wall of the transformer body 4 and covers the outside of the booster pump 8 and the radiating pipe 9; the protective box 5 can be connected with the side wall of the transformer body 4 by bolts or welding. The booster pump 8 is fixedly arranged on the clapboard 7; two ends of the partition plate 7 are respectively connected with the protective box 5 and the side wall of the transformer body 4; the radiating pipe 9 penetrates out of the partition plate 7; the bottom of the protective box 5 is connected with a ventilation pipe 10; a heat radiating fan 11 is installed inside the ventilation duct 10.
A filter screen 15 is detachably arranged at the air inlet of the ventilation pipe 10; a heat dissipation net 12 is arranged at the air outlet of the ventilation pipe 10; the radiator fan 11 is installed between the filter screen 15 and the radiator grill 12. The filter screen 15 can filter out impurities to prevent the influence on the heat dissipation fan 11.
The protective box 5 is provided with a box door 14 and a box wall filter screen 18; the radiating pipe 9 adopts an S-shaped radiating pipe. This may serve to increase the heat dissipation area. The box wall of the protection box 5 is provided with a box wall filter screen 18 which can dissipate heat inside the protection box 5.
As an embodiment of the invention, the heat dissipation pipe 9 and the heat dissipation mesh 12 are made of copper, the outer surface of the S-shaped heat dissipation pipe is provided with a control valve, the side surface of the protective box 5 is rotatably connected with a box door 14 through a hinge, the side surface of the box door 14 is provided with an air outlet, the air outlet and the inner wall of the air inlet pipe 10 are both fixedly connected with a filter screen 15, and in the process of oil flowing, the heat on the surface of the S-shaped heat dissipation pipe 9 can be dissipated conveniently by arranging the air inlet pipe 10, the heat dissipation fan 11, the heat dissipation mesh 12 and the air outlet, so that the whole transformer has.
As an operation mode of the invention: when the oil-immersed transformer needs to be used, in the working process of the oil-immersed transformer body 4, the oil outlet pipe 6, the booster pump 8 and the S-shaped radiating pipe 9 are utilized to enable oil inside the oil-immersed transformer body 4 to flow circularly, in the flowing process, a part of heat generated in the working process of the oil-immersed transformer body 4 can be taken away, and then the air inlet pipe 10, the radiating fan 11, the radiating net 12 and the air outlet are used for quickly radiating the surface of the S-shaped radiating pipe 9, so that the whole transformer has a quick radiating effect.
As an embodiment of the present invention, a liquid level observation assembly includes: a liquid level observation tube 16 and a seal cap 17; the position close to the top end of the liquid level observation tube 16 is connected to the upper end of a heat radiation oil circuit in the transformer body through a communication top tube; the position close to the bottom end of the liquid level observation tube 16 is connected to the lower end of a heat radiation oil path in the transformer body through a communicating bottom tube; the top end of the liquid level observation tube 16 is connected to a seal cap 17 by a screw thread. Therefore, monitoring personnel can know the amount of oil inside the transformer conveniently.
The base component is provided with a fixed bottom plate 1 and a fixed beam 3; the upper surface of PMKD 1 is fixedly connected with hydraulic shock absorber 2, and the quantity of hydraulic shock absorber 2 is four, and four hydraulic shock absorbers 2 are the upper surface of rectangle array setting at PMKD 1.
The upper surface overlap joint of hydraulic shock absorber 2 has fixed beam 3, the last fixed surface of fixed beam 3 is connected with oil-immersed transformer body 4, the last fixed surface of hydraulic shock absorber 2 is connected with fixed threaded rod 13, the through-hole with fixed threaded rod 13 looks adaptation is seted up to the upper surface of fixed beam 3, the surface threaded connection of fixed threaded rod 13 has fixation nut, the quantity of fixed beam 3 is four, two fixed beams 3 use the positive central line of oil-immersed transformer body 4 to set up the lower surface at oil-immersed transformer body 4 as symmetry axis symmetry, through setting up fixed beam 3, fixed threaded rod 13 and fixation nut, be convenient for fix oil-immersed transformer body 4 at the upper surface of hydraulic shock absorber 2, through setting up hydraulic shock absorber 2, can reduce the vibrations of oil-immersed transformer body 4 during operation.
The invention also relates to a transformer temperature control system, as shown in fig. 4, comprising: a plurality of oil-immersed transformers 21 and temperature control terminals 22;
those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed in the transformer temperature control system may be embodied in electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The block diagrams shown in the figures to which the temperature control system of the transformer relates are only functional entities and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The temperature controlled terminal 22 may be implemented in various forms. For example, the terminal described in the embodiments of the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a Digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
The oil-immersed transformer 21 is provided with a temperature sensor for sensing the temperature of the transformer, an oil temperature sensor for sensing the oil temperature in the radiating pipe 9, a single chip microcomputer, a communication module, a fan control circuit and a pump control circuit; the heat radiating pipe 9 is provided with a flowmeter;
the single chip microcomputer is connected with the temperature sensor and the oil temperature sensor to acquire the running temperature information of the transformer and the oil temperature information inside the radiating pipe;
the single chip microcomputer is connected through a flowmeter to obtain the flow information of the transformer oil;
the single chip microcomputer is connected with the cooling fan 11 through a fan control circuit and controls the cooling fan 11 to operate;
the single chip microcomputer is connected with the booster pump 8 through a pump control circuit to control the operation of the booster pump 8;
the single chip microcomputer is connected with the temperature control terminal through the communication module, sends temperature information to the temperature control terminal, receives control information sent by the temperature control terminal, and controls the operation of the cooling fan 11 and the booster pump 8 respectively.
The implementation mode provided by the invention can effectively cool the oil-immersed transformer, and carries out linkage adjustment on the fan and the booster pump in the oil-immersed transformer, thereby cooling the oil-immersed transformer.
The embodiment provided by the invention aims to reduce the oil temperature of the transformer and further realize the cooling of the transformer. The transformer oil can be cooled through the linkage control of the cooling fan 11 and the booster pump 8, and the purpose of cooling the transformer is achieved.
The temperature control terminal 22 acquires the running state data of each oil-immersed transformer;
the operating state data includes: the system comprises a heat radiation fan, a fan motor, a transformer, a heat radiation pipe, a booster pump, a transformer oil pump.
It can be understood that the temperature state of the oil-immersed transformer is a crucial datum for stable operation. The temperature control terminal can know the running state of each oil-immersed transformer by acquiring the data, and then when the temperature exceeds a threshold value, effective control cooling is carried out, and stable running of the transformer is guaranteed.
In the invention, the linkage operation of the cooling fan and the booster pump is an important means for ensuring the oil temperature of the transformer. The transformer oil can be ensured to be within a preset temperature range by controlling the cooling fan and the booster pump, and the stable operation of the transformer is ensured.
The temperature control terminal analyzes whether the running state data exceeds a threshold value;
namely, the temperature control terminal respectively analyzes whether the running temperature information of the transformer and the internal oil temperature information of the radiating pipe exceed the threshold value; for example, the running temperature information of the transformer exceeds a threshold value, or the oil temperature information exceeds a threshold value;
the temperature control terminal acquires temperature information at the input end of the heat dissipation oil path, temperature information at the oil outlet pipe of the heat dissipation oil path and temperature difference;
if the temperature information at the input end of the heat dissipation oil circuit is higher than the input-side temperature threshold value;
the temperature control terminal controls the operation of the cooling fan, increases the output power of the fan motor and improves the rotating speed;
controlling a booster pump to reduce output power and reducing the flow rate of transformer oil in the heat dissipation pipe;
the temperature control terminal acquires temperature information at the input end of the radiating oil path, transformer operation temperature information and oil temperature information in the radiating pipe in real time;
when the operation temperature information of the transformer reaches the normal working temperature and the temperature information at the input end of the radiating oil way reaches the range of the oil temperature threshold value of the preset input end, the temperature control terminal respectively controls the fan motor and the booster pump to operate for a preset time period under the current operation state, controls the fan motor to reduce the output power at intervals of half an hour or one hour, and controls the booster pump to improve the output power;
the temperature control terminal monitors the running temperature information of the transformer, the temperature information and the temperature difference at the input end of the heat dissipation oil way in real time;
when the operation temperature information of the transformer, the temperature information and the temperature difference at the input end of the radiating oil way reach the normal range and continuously operate for a preset time, the temperature control terminal respectively controls the fan motor and the booster pump to operate at a preset normal output power.
In the invention, for the oil-immersed transformer, the heating condition of the oil-immersed transformer can be measured by a temperature sensor. When the operating temperature of the oil-immersed transformer exceeds the threshold value, the output power of the fan motor can be increased, and the rotating speed is increased to realize cooling. And the output power is reduced by combining with a booster pump, the transformer oil is effectively cooled and then is input into the oil-immersed transformer for cooling, and the temperature of the transformer is ensured to be within a normal range. That is to say, the temperature of the transformer is effectively controlled by acquiring the state of the cooling fan in the oil-immersed transformer, the operating state of the booster pump and the current temperature value corresponding to each temperature sensor. Realize promoting the rotational speed to compare the temperature variation in real time, confirm the transformer running state, realized accurate control, the rotational speed that also is promoted according to the target volume reduces the flow of transformer oil, certainly also need to guarantee to have certain flow, guarantees the inside cooling effect of transformer, adjusts radiator fan's rotational speed, can realize realizing the cooling of oil-immersed transformer with less rotational speed increment, has realized oil-immersed transformer's cooling.
Calculating the running average value of each oil-immersed transformer in the temperature control terminal in each preset monitoring time period;
the running average includes: the average rotating speed of the cooling fan, the average running temperature of the transformer, the average oil temperature inside the cooling pipe, the average output power of the booster pump and the average oil flow of the transformer;
in the system, a plurality of time periods can be set as monitoring time periods, namely, the monitoring time periods are preset, and then an average value is calculated for data information acquired in the previous monitoring time periods. And comparing the average values to judge whether the average values are within the threshold range. Or the system configures an average value that meets operational requirements for subsequent use.
The temperature control terminal acquires operation data of each transformer;
the operational data of the transformer includes: the method comprises the following steps of (1) measuring a rotating speed value of a cooling fan, an operation temperature value of a transformer, an internal oil temperature value of a cooling pipe, an output power value of a booster pump and an oil flow value of the transformer;
that is, the temperature control terminal may acquire an instantaneous value based on a time point, or a time unit shorter than a preset monitoring period. The time units shorter than the preset monitoring time period can also be determined by taking the average value, or the median, or the maximum value and the minimum value.
The temperature control terminal calculates the operation data value and the operation average value of each oil-immersed transformer to obtain a comparison state value;
extracting a comparative state value obtained by each oil-immersed transformer;
the comparison state value can be obtained by calculating the operation data value and the operation average value of the oil-immersed transformer based on addition, subtraction, multiplication, division and variance.
Here, the operation rule between the operation data value and the operation average value of the oil-immersed transformer may be configured by a monitoring person according to the actual operation state based on the requirement of the monitoring system. The calculation of each oil-immersed transformer can be uniformly processed in the system, so that the conclusion has a mutual reference value, and uniform monitoring can be realized.
The comparison state value can judge whether the comparison state value of each oil-immersed transformer is in a normal range, if the comparison state value exceeds a preset range, a fault may occur, and monitoring personnel can be prompted.
The temperature control terminal calls a comparison state value of each oil-immersed transformer, and the comparison state value of each oil-immersed transformer and a preset calibration value are calculated to obtain a calibration difference value;
sorting the calibration difference values of all oil-immersed transformers according to the size;
the temperature control terminal is also used for acquiring the operation data of each oil-immersed transformer in real time and sequencing the updated calibration difference values; setting an oil-immersed transformer with the largest calibration difference value at the foremost end of the sequence, wherein the oil-immersed transformer has a larger potential fault occurrence probability compared with other oil-immersed transformers; and identifying the address code of the oil-immersed transformer at the forefront end of the sequence.
In the invention, because the running state, the environment and the model attribute of each oil-immersed transformer are different and have different running parameters, in order to monitor uniformly and realize the comprehensive monitoring of the oil-immersed transformers, the comparison state value and the preset calibration value of each oil-immersed transformer are calculated to obtain the calibration difference value; namely, the real-time state of each oil-immersed transformer and the standard value under the normal condition of each oil-immersed transformer are calculated to obtain the calibration difference value. The operating state of each oil-immersed transformer is considered by considering the difference between the operating state of each oil-immersed transformer and the standard value under the normal condition of the oil-immersed transformer, so that the purpose of unified monitoring is achieved.
The calibration difference values of all oil-immersed transformers are sorted according to the size, monitoring personnel can know the state of the oil-immersed transformers based on the sorting result of the calibration difference values, the situation that the running conditions of the oil-immersed transformers are only considered in the running state of a single transformer is prevented, the states of the upper area and the lower area of the transformer cannot be known, and therefore the whole monitoring of a power distribution network or a power supply network can be achieved. The system is convenient for monitoring personnel to integrally control the system, and the fault occurrence probability of the power supply network is convenient.
The transformer temperature control system provided by the present invention is the units and algorithm steps of the examples described in connection with the embodiments disclosed herein, and can be implemented in electronic hardware, computer software, or a combination of both, and in the above description the components and steps of the examples have been generally described in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An oil-filled transformer, comprising: the transformer comprises a transformer body (4), wherein a base assembly is arranged at the bottom of the transformer body (4);
one side of the transformer body (4) is connected with a liquid level observation assembly; the other side of the transformer body (4) is provided with a heat dissipation assembly;
the heat dissipation assembly is provided with a booster pump (8) and a heat dissipation fan (11);
the input end of the booster pump (8) is connected with an oil outlet pipe (6) of a heat radiation oil circuit in the transformer body through a pipeline;
the output end of the booster pump (8) is connected to the input end of the radiating oil circuit through a radiating pipe (9);
the wind output direction of the heat radiation fan (11) faces the heat radiation pipe (9).
2. Oil filled transformer according to claim 1,
the heat dissipation assembly is also provided with a protective box (5);
the protective box (5) is connected to the side wall of the transformer body (4) and covers the outside of the booster pump (8) and the radiating pipe (9);
the booster pump (8) is fixedly arranged on the clapboard (7); two ends of the partition plate (7) are respectively connected with the protective box (5) and the side wall of the transformer body (4);
the radiating pipe (9) penetrates out of the partition plate (7);
the bottom of the protective box (5) is connected with a ventilation pipe (10);
the heat radiation fan (11) is arranged inside the ventilation pipe (10).
3. Oil filled transformer according to claim 2,
a filter screen (15) is detachably arranged at the air inlet of the ventilation pipe (10);
a heat dissipation net (12) is arranged at an air outlet of the ventilation pipe (10);
the heat radiation fan (11) is arranged between the filter screen (15) and the heat radiation net (12).
4. Oil filled transformer according to claim 2,
a box door (14) and a box wall filter screen (18) are arranged on the protective box (5);
the radiating pipe (9) adopts an S-shaped radiating pipe.
5. Oil filled transformer according to claim 1 or 2,
the liquid level observation assembly includes: a liquid level observation tube (16) and a sealing cover (17);
the position close to the top end of the liquid level observation tube (16) is connected to the upper end of a heat radiation oil circuit in the transformer body through a communication top tube;
the position close to the bottom end of the liquid level observation tube (16) is connected to the lower end of a heat radiation oil path in the transformer body through a communicating bottom tube;
the top end of the liquid level observation pipe (16) is connected with the sealing cover (17) in a threaded mode.
6. Oil filled transformer according to claim 1 or 2,
the base component is provided with a fixed bottom plate (1) and a fixed beam (3);
the fixed bottom plate (1) is connected with four hydraulic shock absorbers (2);
the four hydraulic shock absorbers (2) are arranged on the upper surface of the fixed bottom plate (1) in a rectangular array;
the top end of the hydraulic shock absorber (2) is connected with the fixed beam (3) through a fixed threaded rod (13) and a fixed nut;
the top end of the fixed beam (3) is connected with the transformer body (4).
7. A transformer temperature control system, comprising: a plurality of oil-filled transformers according to any of claims 1 to 6 and temperature controlled terminals;
the oil-immersed transformer is provided with a temperature sensor for sensing the temperature of the transformer, an oil temperature sensor for sensing the internal oil temperature of the radiating pipe (9), a singlechip, a communication module, a fan control circuit and a pump control circuit; a flowmeter is arranged on the radiating pipe (9);
the single chip microcomputer is connected with the temperature sensor and the oil temperature sensor to acquire the running temperature information of the transformer and the oil temperature information inside the radiating pipe;
the single chip microcomputer is connected through a flowmeter to obtain the flow information of the transformer oil;
the singlechip is connected with the cooling fan (11) through a fan control circuit and controls the cooling fan (11) to operate;
the singlechip is connected with the booster pump (8) through a pump control circuit to control the operation of the booster pump (8);
the single chip microcomputer is connected with the temperature control terminal through the communication module, sends temperature information to the temperature control terminal, receives control information sent by the temperature control terminal, and controls the operation of the cooling fan (11) and the booster pump (8) respectively.
8. The transformer temperature control system of claim 7,
the temperature control terminal acquires the running state data of each oil-immersed transformer;
the temperature control terminal analyzes whether the running state data exceeds a threshold value;
when the running state data of the transformer exceeds a threshold value, the temperature control terminal respectively controls the fan motor and the booster pump to run for a preset time period in the current running state, controls the fan motor to reduce the output power at intervals of half an hour or one hour, and controls the booster pump to improve the output power;
the temperature control terminal monitors the running state data in real time, and after the temperature control terminal continuously runs for a preset time, the temperature control terminal respectively controls the fan motor and the booster pump to recover to run at normal output power.
9. The transformer temperature control system of claim 7,
calculating the running average value of each oil-immersed transformer in the temperature control terminal in each preset monitoring time period;
calculating the running data value and the running average value of each oil-immersed transformer to obtain a comparison state value;
extracting a comparative state value obtained by each oil-immersed transformer;
and judging whether the comparison state value of each oil-immersed transformer is within a normal range, if the comparison state value exceeds a preset range, possibly causing a fault, and prompting monitoring personnel.
10. The transformer temperature control system of claim 9,
the temperature control terminal calls a comparison state value of each oil-immersed transformer, and the comparison state value of each oil-immersed transformer and a preset calibration value are calculated to obtain a calibration difference value;
sorting the calibration difference values of all oil-immersed transformers according to the size;
the temperature control terminal is also used for acquiring the operation data of each oil-immersed transformer in real time and sequencing the updated calibration difference values; setting an oil-immersed transformer with the largest calibration difference value at the foremost end of the sequence, wherein the oil-immersed transformer has a larger potential fault occurrence probability compared with other oil-immersed transformers; and identifying the address code of the oil-immersed transformer at the forefront end of the sequence.
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| CN202110364702.8A CN112802660B (en) | 2021-04-06 | 2021-04-06 | Oil-immersed transformer and transformer temperature control system |
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| CN202110364702.8A CN112802660B (en) | 2021-04-06 | 2021-04-06 | Oil-immersed transformer and transformer temperature control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090109620A1 (en) * | 2007-10-31 | 2009-04-30 | Wang Cheng-Tu | Heat-dissipating device of portable electronic apparatus |
| CN201796683U (en) * | 2010-08-26 | 2011-04-13 | 江苏上能变压器有限公司 | Large-size oil immersed power transformer with a plurality of cooling types |
| CN111446070A (en) * | 2020-04-28 | 2020-07-24 | 广东电网有限责任公司东莞供电局 | Fully-sealed oil-immersed power transformer |
| CN212434429U (en) * | 2020-07-30 | 2021-01-29 | 湖北汉成电气有限公司 | High-efficient radiating oil-immersed power transformer casing |
| CN212587318U (en) * | 2020-06-05 | 2021-02-23 | 扬州市苏源电器有限公司 | Oil-immersed transformer equipment with efficient heat dissipation |
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2021
- 2021-04-06 CN CN202110364702.8A patent/CN112802660B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090109620A1 (en) * | 2007-10-31 | 2009-04-30 | Wang Cheng-Tu | Heat-dissipating device of portable electronic apparatus |
| CN201796683U (en) * | 2010-08-26 | 2011-04-13 | 江苏上能变压器有限公司 | Large-size oil immersed power transformer with a plurality of cooling types |
| CN111446070A (en) * | 2020-04-28 | 2020-07-24 | 广东电网有限责任公司东莞供电局 | Fully-sealed oil-immersed power transformer |
| CN212587318U (en) * | 2020-06-05 | 2021-02-23 | 扬州市苏源电器有限公司 | Oil-immersed transformer equipment with efficient heat dissipation |
| CN212434429U (en) * | 2020-07-30 | 2021-01-29 | 湖北汉成电气有限公司 | High-efficient radiating oil-immersed power transformer casing |
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