CN111487077B - Cooling verification method and verification device for power transformer cooling equipment - Google Patents
Cooling verification method and verification device for power transformer cooling equipment Download PDFInfo
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- CN111487077B CN111487077B CN202010348961.7A CN202010348961A CN111487077B CN 111487077 B CN111487077 B CN 111487077B CN 202010348961 A CN202010348961 A CN 202010348961A CN 111487077 B CN111487077 B CN 111487077B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
Abstract
The embodiment of the invention discloses a cooling verification method of power transformer cooling equipment, which comprises the steps of establishing a temperature database of each part of a transformer when no cooling equipment is arranged, then manufacturing a cooling fin model with reduced equal proportion, connecting the cooling fin model into an oil cooling cycle, preheating by a heating device, carrying out fine adjustment on the temperature of oil cooling liquid by a temperature fine adjustment device according to the temperature database, then installing the cooling equipment with reduced equal proportion, starting the cooling equipment to detect the temperature change of the cooling fin, comparing the acquired temperature change data with cooling simulation data to finish cooling verification, wherein the cooling equipment comprises a cooling pipe, an oil outlet pipe, a heating box for heating the oil cooling liquid, a pressure pump and an oil inlet pipe for enabling the oil cooling liquid to circularly flow, and the temperature difference existing among a plurality of cooling fins in actual use can be controlled by utilizing a fine adjustment component, thereby making the simulation more realistic.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a cooling verification method and a cooling verification device for power transformer cooling equipment.
Background
A transformer is a stationary electrical device that converts alternating current electrical energy of one voltage to alternating current of another voltage of the same frequency through the application of electromagnetic induction, the primary components being a primary coil, a secondary coil and an iron core.
The current transformers are various and can be divided into dry transformers and oil-immersed transformers according to cooling modes, and for the oil-immersed transformers, the oil-immersed transformers can be cooled quickly during operation by taking oil as a cooling medium, but in the practical process, the temperature of the transformers can be stabilized within a normal range by additionally arranging a radiator on an oil-cooled radiator according to different external environments.
Because the transformer is in high-voltage electric operation, the cooling effect of the heat dissipation device which is inconvenient for direct detection of the pins when the heat dissipation device is designed can be calculated theoretically only through simulation software, and the problem of certain defects exists when the heat dissipation device is designed is easily caused.
Disclosure of Invention
Therefore, the embodiment of the invention provides a cooling verification method and a cooling verification device for a power transformer cooling device, wherein the transformer is in high-voltage operation, the cooling effect of the power transformer cooling device cannot be directly detected when the cooling device is designed, and the problem that the designed cooling device is easy to have defects only through simulation calculation is solved.
In order to achieve the above object, an embodiment of the present invention provides the following:
a cooling verification method of power transformer cooling equipment comprises the following steps:
step S100, collecting temperature data of all parts of a running transformer when no cooling equipment is available, and establishing a temperature database;
s200, manufacturing a plurality of groups of transformer radiating fins which are reduced in equal proportion according to the transformer, and assembling according to actual proportion;
step S300, connecting the assembled radiating fins into an oil cooling circulation, preheating oil cooling liquid through a heating device, and carrying out fine adjustment on the temperature of the oil cooling liquid through a temperature fine adjustment device according to a temperature database;
step S400, manufacturing an equal-scale reduction model according to the heat dissipation equipment to be tested, and installing the equal-scale reduction model on a transformer heat dissipation sheet;
and S500, starting the installed heat dissipation equipment equal-scale reduction model, collecting temperature change data of the transformer heat dissipation fins, comparing the collected temperature change data with the cooling simulation data, and finishing cooling verification.
As a preferred aspect of the present invention, the temperature database includes temperature data of each portion when the transformer is operated at full power, when the transformer is operated at normal power, and when the transformer is operated at minimum power.
As a preferable aspect of the present invention, the temperature data based on which the oil-cooling liquid is heated by the heating device is temperature data of each part of the transformer operated at a normal power.
As a preferred scheme of the present invention, establishing the temperature database specifically includes:
step S101, establishing a transformer data model;
step S102, acquiring the graphic information of the transformer during working and the infrared signal information matched with the graphic information by a thermal imaging camera in 360 degrees;
and step S103, converting the acquired infrared signal information into temperature information, substituting the temperature information into the established transformer data model according to the image information, and completing the establishment of a temperature database.
A verification device of a power transformer cooling device comprises a radiating pipe, an oil outlet pipe, a heating box for heating oil-cooled liquid, a pressure pump for enabling the oil-cooled liquid to circularly flow and an oil inlet pipe which are sequentially connected together, wherein the oil outlet pipe and the oil inlet pipe are respectively positioned at two ends of the radiating pipe;
the fine setting subassembly is including being used for keeping apart adjacent two the division board of cooling tube and the bellows that is located the cooling tube rear, the fresh air inlet has been seted up on bellows and the corresponding position of cooling tube, just is in be provided with the air control board through driving motor drive on the fresh air inlet, the both sides of cooling tube all are provided with supplementary heater strip, adjacent two be provided with between the division board through driving motor drive and be used for driving supplementary heater strip and keep away from or be close to the two-way lead screw of cooling tube.
As a preferred scheme of the present invention, the bidirectional screw and the air volume control plate are driven by the same driving motor, the bidirectional screw is connected to the driving motor through a first driving assembly, and the air volume control plate is connected to the driving motor through a second driving assembly.
As a preferable scheme of the present invention, the first driving assembly includes a driving wheel connected to the bidirectional screw through belt transmission, the driving wheel is connected to a control rod through meshing between a gear and a rack, and the control rod is connected to the driving motor through meshing between the gear and the rack.
As a preferable aspect of the present invention, a length of a rack engaged with the driving motor is longer than a length of a rack engaged with the driving wheel.
As a preferable scheme of the present invention, the first driving assembly and the second driving assembly have the same structure, and the two racks on the control rod in the second driving assembly are on the same side.
As a preferable scheme of the present invention, both ends of the air volume control plate are provided with a sealing rubber block.
The embodiment of the invention has the following advantages:
when the simulation transformer is used, the high temperature generated during the working of the transformer can be effectively simulated by heating the oil-cooling liquid by using the arranged heating box, the temperature difference between all parts can be effectively controlled by matching with the arranged fine adjustment assembly when the simulation transformer works, the certain difference of all parts caused by the influence of external environmental factors can be effectively simulated during the working of the transformer, the temperature reduction simulation can be effectively carried out on the designed heat dissipation equipment by matching with the simulation, and the problem that the defects are easy to occur during the design of the heat dissipation equipment can be effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a trim component according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a control rod of the first driving assembly according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a control rod of the second drive assembly according to the embodiment of the present invention;
fig. 5 is an enlarged view of a portion a of fig. 2.
In the figure:
1-radiating pipe; 2-an oil outlet pipe; 3-heating the box; 4-a pressure pump; 5-an oil inlet pipe; 6-fine adjustment component;
601-a separator plate; 602-a wind box; 603-air inlet holes; 604-air volume control panel; 605-auxiliary heating wire; 606-a bidirectional lead screw; 607-a first drive assembly; 608-a second drive assembly; 609-a driving wheel; 610-a control lever; 611-sealing rubber blocks.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below 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.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 to 5, the present invention provides a cooling verification method for a power transformer cooling device, including the following steps:
step S100, collecting temperature data of all parts of a transformer when no cooling equipment is arranged, and establishing a temperature database;
s200, manufacturing a plurality of groups of transformer radiating fins which are reduced in equal proportion according to the transformer, and assembling according to actual proportion;
step S300, connecting the assembled radiating fins into an oil cooling circulation, preheating oil cooling liquid through a heating device, and carrying out fine adjustment on the temperature of the oil cooling liquid through a temperature fine adjustment device according to a temperature database;
step S400, manufacturing an equal-scale reduction model according to the heat dissipation equipment to be tested, and installing the equal-scale reduction model on a transformer heat dissipation sheet;
and S500, starting the installed heat dissipation equipment equal-scale reduction model, collecting temperature change data of the transformer heat dissipation fins, comparing the collected temperature change data with the cooling simulation data, and finishing cooling verification.
The transformer radiating fins are preferably manufactured in three groups, and radiating fins with corresponding number can be manufactured according to the simulated actual condition of the transformer, so that the designed radiating equipment can be more attached to the actual use condition when being tested.
The temperature database includes temperature data for each location during full power operation of the transformer, during normal power operation of the transformer, and during minimum power operation of the transformer.
The temperature database can also comprise temperature data of all parts of the transformer when the transformer moves at different powers in various environments, and further can simulate the temperature of the radiating fins of the transformer when the transformer runs under more conditions when the designed radiating equipment is verified to have a cooling effect, so that the problem that the designed radiating equipment has defects can be avoided to the maximum extent.
The temperature data according to which the oil cooling liquid is heated by the heating device is the temperature data of each part of the transformer operating under the conventional power.
The oil cooling liquid is heated to a more balanced position of temperature through the heating device, and further, corresponding fine adjustment is conveniently made on the oil cooling liquid through the temperature fine adjustment device, and the temperature difference between the radiating fins under different environments can be effectively simulated.
Establishing a temperature database, which specifically comprises the following steps:
step S101, establishing a transformer data model;
step S102, acquiring the graphic information of the transformer during working and the infrared signal information matched with the graphic information by a thermal imaging camera in 360 degrees;
and step S103, converting the acquired infrared signal information into temperature information, substituting the temperature information into the established transformer data model according to the image information, and completing the establishment of a temperature database.
It is to be noted that, in establishing the temperature database, temperature data of the surrounding environment, wind speed data, humidity data, and the like at the time of collecting the data should be recorded.
The thermal imaging camera here has the following principle: the infrared electromagnetic wave emitted by the object is collected, the infrared signal is converted into an electric signal, the radiation energy, namely the temperature, is displayed through different gray scales through a signal processing system, and the object temperature is calculated through different representative temperatures of the gray scales. The temperature information of each part of the transformer during working can be conveniently and remotely collected by a user, the information is collected more quickly, and the safety of the transformer is higher.
As shown in fig. 1 and 2, a verification apparatus for a power transformer cooling device includes a heat dissipation pipe 1, an oil outlet pipe 2, a heating box 3 for heating oil-cooling liquid, a pressure pump 4 for circulating the oil-cooling liquid, and an oil inlet pipe 5, which are connected in sequence, wherein the oil outlet pipe 2 and the oil inlet pipe 5 are respectively located at two ends of the heat dissipation pipe 1, and a fine adjustment assembly 6 for adjusting the temperature of the heat dissipation pipe 1 is arranged at one end of the heat dissipation pipe 1 close to the oil inlet pipe 5;
the fine tuning assembly 6 comprises partition boards 601 for separating two adjacent radiating pipes 1 and a bellows 602 located behind the radiating pipes 1, the bellows 602 is provided with air inlet holes 603 corresponding to the radiating pipes 1, and air volume control boards 604 driven by driving motors are arranged on the air inlet holes 603, auxiliary heating wires 605 are arranged on two sides of the radiating pipes 1, and two-way screws 606 driven by the driving motors and used for driving the auxiliary heating wires 605 to be far away from or close to the radiating pipes 1 are arranged between the two adjacent partition boards 601.
One end of the radiating pipe 1 close to the fine adjustment assembly 6 is provided with a temperature sensor for detecting the temperature change of the radiating pipe 1 in real time, and the problem that the simulated transformer radiating fin is greatly different from a theoretical value is avoided.
As shown in fig. 1 to 5, the bidirectional screw 606 and the air volume control plate 604 are driven by the same driving motor, the bidirectional screw 606 is connected to the driving motor through a first driving assembly 607, the air volume control plate 604 is connected to the driving motor through a second driving assembly 608, the first driving assembly 607 includes a driving wheel 609 connected to the bidirectional screw 606 through a belt transmission, a control lever 610 is connected to the driving wheel 609 through a gear and rack engagement, and the control lever 610 is connected to the driving motor through a gear and rack engagement.
The both ends of two-way lead screw 606 are provided with the screw thread that turns to the difference soon, and further when two-way lead screw 606 is rotatory, then can make two supplementary heater strip 605 in opposite directions or relative motion, when heating the oil cooling liquid in cooling tube 1 promptly, can make supplementary heater strip 605 paste tight cooling tube 1 to can improve the heating efficiency of supplementary heater strip 605 to the oil cooling liquid heating.
It is to be noted that the length of the rack engaged with the driving motor is longer than the length of the rack engaged with the driving wheel 609.
The first driving assembly 607 and the second driving assembly 608 are identical in structure, and the two racks on the control rod 610 in the second driving assembly 608 are on the same side.
In the using process, the control rods 610 in the first driving module 607 and the second driving module 608 are all connected with the driving motor through the way of meshing between the gear and the rack, that is, when the temperature of the oil-cooling liquid in the heat dissipation pipe 1 needs to be raised, the driving motor rotates to drive the air volume control plate 604 to move, so that the air volume control plate 604 closes the air inlet hole 603, in the process, because of the length of the rack in the first driving module 607, where the control rod 610 is meshed with the driving wheel 609, the driving motor cannot drive the auxiliary heating wire 605 to move, when the driving motor continues to rotate, the rack on the control rod 610 will be disengaged from the driving wheel 609 in the second driving module 608, and the air volume control plate 604 will not be driven to move, at this time, the control rod 610 in the first driving module 607 will be meshed with the driving wheel 609, so that the purpose of the air volume control plate 604 not moving the bidirectional screw 606 can be realized, after the air inlet 603 is closed by the air volume control plate 604, the auxiliary heating wire 605 is close to the radiating pipe 1 for heating the oil cooling liquid inside the radiating pipe.
The movement process of the radiator in the cooling process is opposite to the movement process, namely the aim of cooling the oil cooling liquid in the radiating pipe 1 by increasing the air circulation speed is fulfilled.
The two ends of the air volume control plate 604 are provided with the sealing rubber blocks 611, and the sealing rubber blocks 611 have certain elasticity, so that after the air volume control plate 604 seals the air inlet hole 603, the problem of air leakage easily occurring can be effectively avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The verification device of the power transformer cooling equipment is characterized by comprising a radiating pipe (1), an oil outlet pipe (2), a heating box (3) for heating oil-cooling liquid, a pressure pump (4) for enabling the oil-cooling liquid to circularly flow and an oil inlet pipe (5) which are sequentially connected together, wherein the oil outlet pipe (2) and the oil inlet pipe (5) are respectively positioned at two ends of the radiating pipe (1), and one end, close to the oil inlet pipe (5), of the radiating pipe (1) is provided with a fine adjustment assembly (6) for adjusting the temperature of the radiating pipe (1);
fine setting subassembly (6) are including being used for keeping apart adjacent two division board (601) of cooling tube (1) and bellows (602) that are located cooling tube (1) rear, air inlet (603) have been seted up on bellows (602) and cooling tube (1) corresponding position, and be provided with air control board (604) through driving motor driven on air inlet (603), the both sides of cooling tube (1) all are provided with supplementary heater strip (605), adjacent two be provided with between division board (601) and be used for driving two-way lead screw (606) that supplementary heater strip (605) kept away from or are close to cooling tube (1) through the driving motor drive.
2. The verification device of the power transformer cooling equipment as claimed in claim 1, wherein the bidirectional lead screw (606) and the air volume control plate (604) are driven by the same driving motor, the bidirectional lead screw (606) is connected with the driving motor through a first driving assembly (607), and the air volume control plate (604) is connected with the driving motor through a second driving assembly (608).
3. A verification device for a power transformer cooling device according to claim 2, wherein the first driving assembly (607) comprises a driving wheel (609) connected with the bidirectional screw (606) through a belt transmission, a control rod (610) is connected to the driving wheel (609) through a gear and rack meshing, and the control rod (610) is connected with a driving motor through the gear and rack meshing.
4. A verification device for a power transformer cooling device according to claim 3, wherein the length of the rack engaged with said driving motor is greater than the length of the rack engaged with said transmission wheel (609).
5. A verification device for a power transformer temperature reducing apparatus according to claim 3, wherein the first driving assembly (607) and the second driving assembly (608) are identical in structure, and two racks on a control rod (610) in the second driving assembly (608) are located on the same side.
6. The verification device of the power transformer cooling equipment as claimed in claim 1, wherein both ends of the air volume control plate (604) are provided with sealing rubber blocks (611).
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| CN202010348961.7A CN111487077B (en) | 2020-04-28 | 2020-04-28 | Cooling verification method and verification device for power transformer cooling equipment |
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| CN111930104B (en) * | 2020-08-18 | 2023-02-03 | 云南电网有限责任公司德宏供电局 | Portable temperature controller checking system based on oil groove |
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