CN110988519B - Method and system for manufacturing transformer winding scaling model - Google Patents
Method and system for manufacturing transformer winding scaling model Download PDFInfo
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- CN110988519B CN110988519B CN201911100685.6A CN201911100685A CN110988519B CN 110988519 B CN110988519 B CN 110988519B CN 201911100685 A CN201911100685 A CN 201911100685A CN 110988519 B CN110988519 B CN 110988519B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/22—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in capacitance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a method and a system for manufacturing a transformer winding scale model. The method and the system set the proportional value of the transformer winding scale model and the actual transformer winding, reduce each part of the actual transformer winding according to the proportional value, calculate the dielectric constant of the insulating liquid filled in the scale model according to the set proportional value and the dielectric constant of the insulating liquid of the actual transformer winding, and then fill the liquid with the dielectric constant into the oil tank. The method and the system for manufacturing the transformer winding scaling model have the advantages that the winding deformation scaling model is simple to manufacture and takes less time, the cost and the time are saved, the winding deformation condition can be conveniently tested by using a small sensor in a laboratory, the early preparation is provided for the field frequency response method for testing the actual transformer, the resonance frequency of the scaling model is ensured to be consistent with the actual winding, and the transformer winding scaling model can truly reflect the fault of the actual transformer winding.
Description
Technical Field
The present invention relates to the field of transformer technology, and more particularly, to a method and system for making a transformer winding scaling model.
Background
Transformer winding deformation refers to the irreversible change in the size or shape of the winding under the action of electrodynamic and mechanical forces. It includes changes in axial and radial dimensions, body displacement, winding distortion, bulging, turn-to-turn short circuits, etc. In addition, winding distortion also has a cumulative effect. Therefore, the transformer with deformed windings is a hidden accident hazard, and major accidents such as transformer damage and the like can occur if the transformer meets a large overcurrent action during operation. At present, the deformation fault of the transformer winding becomes one of the main faults of the transformer, therefore, the deformation of the transformer winding must be detected and the deformation degree thereof must be diagnosed, and thus preventive maintenance of the transformer must be carried out.
Therefore, a scientific and feasible detection method needs to be researched and formulated to realize the detection of the deformation of the transformer winding, and a lot of efforts are put into the research work of the detection method of the deformation of the transformer winding in many countries in the world, and the detection method is divided into online diagnosis and offline detection according to whether the transformer is shut down or not. Among them, the most commonly used winding deformation monitoring method is a frequency response method. After the transformer winding is deformed, parameters such as inductance, ground capacitance, turn-to-turn capacitance and the like of the winding can be changed. The working principle of the frequency response method is that the change of distributed inductance and distributed capacitance of the winding is reflected through a frequency response curve of the winding, and whether the winding is deformed or not is judged.
The method for detecting and diagnosing the deformation degree of the power transformer winding has great practical significance and economic value for transformers, particularly large transformers. When the winding deformation degree is detected on line, the actual power transformer winding still runs in a live-line mode and is large in size, and the cost is high and the winding deformation test is inconvenient to design detection equipment and carry out. Therefore, transformer winding scaling models with similar electrical characteristics are needed to be designed for carrying out winding deformation research and are popularized to crude oil immersed transformer windings. Namely, the transformer winding scaling model with similar electrical characteristics is designed to replace the original model to carry out the transformer winding deformation test, and the method has important engineering practical value.
At present, scholars at home and abroad have already studied the application of a transformer scaling model in a power system, but the research on the influence of the transformer winding scaling model on a winding deformation frequency response curve is less. The Zakrzewski simulation designs a transformer scaling model, three-dimensional modeling simulation is carried out on the three-phase transformer scaling model, the conditions of electric field distribution and the like of the original model are analyzed, the practical value of the transformer scaling model is proved, and the test verification is carried out in the absence of physical entities. M.A. Brubaker et al established a scaling model with a similar ratio of 1/4 based on a 500MVA transformer original model, and carried out oil flow electrification experimental study. The model mainly studies the discharge phenomenon in insulating oil, simplifies the internal insulating structure, only reduces the equal proportion, and the structure is still more complex. And moreover, the conversion of the parameter of the scale model is not researched, so that the research result of the scale model can be popularized to the actual oil-immersed transformer. A scaling model with a similarity ratio of 1/10 is established by Raney JiangJun and the like in Wuhan university based on an extra-high voltage converter transformer, magnetic field distribution of the original model and the scaling model is contrastively analyzed, potential distribution of windings of the scaling model is researched based on a multi-conductor transmission line model of the windings, and meanwhile extremely-fast transient overvoltage distribution of the conical windings is researched. The model adopts a finite element method to obtain a matrix of inductance, capacitance and resistance parameters of a scaling model, but is also based on a simulation model and lacks of a simulation result of physical model verification.
Therefore, a technique for manufacturing a transformer winding scaling model is needed, which can truly reflect the problem of primary winding faults through the manufactured transformer winding scaling model.
Disclosure of Invention
In order to solve the technical problem that the transformer winding scale model manufactured in the prior art is difficult to truly reflect the fault of a primary winding, the invention provides a method for manufacturing the transformer winding scale model, which comprises the following steps:
measuring the structural parameters of an actual transformer winding, and acquiring the dielectric constant of insulating liquid in an oil tank of the actual transformer winding, wherein the structural parameters comprise the diameter, the radial turns and the height of the transformer winding, the diameter of an iron core and the diameter of the oil tank, and the dielectric constant is a first dielectric constant;
setting a ratio value of a transformer winding scale model to be manufactured and an actual transformer winding model;
calculating the dielectric constant of insulating liquid in a transformer winding scaling model according to the first dielectric constant and the set proportional value, and setting the dielectric constant as a second dielectric constant;
manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling;
and uniformly winding the transformer winding manufactured by the scaling on the framework, leading a high-voltage lead of the transformer winding out of the oil tank through a high-voltage bushing, and filling the oil tank with liquid with a second dielectric constant as insulating liquid.
Further, the setting of the ratio of the transformer winding scale model to be manufactured to the transformer winding model includes:
setting the diameter of the transformer winding scaling model to be smaller than that of the actual transformer winding by k 1 Multiple, small radial turns k 2 Multiple, small height k 3 Doubling;
the diameter of the iron core of the transformer winding scaling model is set to be smaller than that of the iron core of the actual transformer winding by k 1 Doubling;
the diameter of the oil tank for setting the transformer winding scaling model is smaller than that of the actual transformer winding by k 1 And (4) doubling.
Further, the dielectric constant of the insulating liquid in the transformer winding scaling model is calculated according to the first dielectric constant and the set proportional value, and the calculation formula is as follows:
in the formula, epsilon 0 Is the first dielectric constant and epsilon is the dielectric constant of the insulating liquid in the scaled model of the transformer winding.
Further, the method is when k 1 ＝k 2 ＝6，k 3 And =1, when the insulating liquid in the actual transformer winding is transformer oil, the liquid distilled water is used as the insulating liquid of the transformer scaling model.
Furthermore, the method adopts iron to manufacture the framework and the oil tank of the scaling model of the transformer winding, and adopts the actual transformer winding turn to wind the scaling model transformer winding.
According to another aspect of the present invention, there is provided a system for making a transformer winding scale model, the system comprising:
the data measuring unit is used for measuring the structural parameters of an actual transformer winding and acquiring the dielectric constant of insulating liquid in an oil tank of the actual transformer winding, wherein the parameters comprise the diameter, the radial turns and the height of the transformer winding, the diameter of an iron core and the diameter of the oil tank, and the dielectric constant is a first dielectric constant;
the proportion setting unit is used for setting a proportion value of a transformer winding scale model to be manufactured and an actual transformer winding model;
the data calculation unit is used for calculating the dielectric constant of the insulating liquid in the transformer winding scaling model according to the first dielectric constant and the set proportional value, and the dielectric constant is set as a second dielectric constant;
the component manufacturing unit is used for manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling;
and the model manufacturing unit is used for uniformly winding the transformer winding with the reduced ratio on the framework, leading the high-voltage lead of the transformer winding out of the oil tank through a high-voltage bushing, and filling the oil tank with liquid with the second dielectric constant as insulating liquid.
Further, the ratio setting unit includes:
a first scale unit for setting the transformer winding scale model to be smaller than the diameter of the actual transformer winding by k 1 Small k times radial turns 2 Multiple, small height k 3 Doubling;
a second proportional unit for setting the scaled model of the transformer winding to be smaller than the core diameter of the actual transformer winding by k 1 Doubling;
a third proportion unit for setting the transformer winding scale model to be smaller than the tank diameter of the actual transformer winding by k 1 And (4) multiplying.
Further, the data calculation unit calculates the dielectric constant of the insulating liquid in the transformer winding scaling model according to the first dielectric constant and the set proportional value, and the calculation formula is as follows:
in the formula, epsilon 0 And epsilon is the dielectric constant of the insulating liquid in the transformer winding scaling model.
Further, when the scale setting unit sets k 1 ＝k 2 ＝6，k 3 And =1, when the insulating liquid in the actual transformer winding is transformer oil, the model making unit adopts liquid distilled water as the insulating liquid of the transformer scaling model according to the calculation result of the data calculation unit.
Furthermore, the part manufacturing unit adopts iron to manufacture the framework and the oil tank of the scaling model of the transformer winding, and the actual transformer winding turn is adopted to wind the scaling model transformer winding.
According to the method and the system for manufacturing the transformer winding scaling model, provided by the technical scheme of the invention, the proportional value of the transformer winding scaling model and the actual transformer winding is set, each part of the actual transformer winding is reduced according to the proportional value, the dielectric constant of the insulating liquid filled in the scaling model is calculated according to the set proportional value and the dielectric constant of the insulating liquid of the actual transformer winding, and then the liquid with the dielectric constant is filled into an oil tank. The method and the system for manufacturing the transformer winding scaling model are used for researching the influence of the transformer scaling model on frequency response to obtain a real object manufacturing method of the scaling model, effectively solve the technical problems that the winding deformation condition of a large-sized transformer needs to be tested on site due to the fact that the existing commonly-used frequency response method is used for detecting the transformer winding deformation test on line, the transformer is inconvenient, the equipment cost of the transformer is high, meanwhile, devices for detecting large sensors and the like used by the field transformer are complex to manufacture and expensive, and the time period of the field test is long after the manufacture is finished. The transformer winding scaling model is researched based on the influence of the transformer winding scaling model on the winding deformation frequency response curve, the internal structure of the transformer is simplified, liquid with a proper dielectric constant is used as insulating liquid, the reduction of capacitance parameters caused by the reduction of the model is remarkably improved, the resonance frequency of the scaling model is ensured to be consistent with that of an actual winding, the transformer winding scaling model can truly reflect the fault of the actual transformer winding, and the test cost and time are saved.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method of making a scaled model of a transformer winding according to a preferred embodiment of the invention;
FIG. 2 is a schematic diagram of a structure for making a scaled model of a transformer winding according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for manufacturing a scaled model of a transformer winding according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same unit/element is denoted by the same reference numeral.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method of manufacturing a scaled model of a transformer winding according to a preferred embodiment of the present invention. As shown in fig. 1, the method for manufacturing the transformer winding scale model according to the preferred embodiment starts with step 101.
In step 101, structural parameters of an actual transformer winding are measured, and a dielectric constant of insulating liquid in an oil tank of the actual transformer winding is acquired, wherein the structural parameters include the diameter, the number of radial turns, the height, the diameter of an iron core and the diameter of the oil tank of the transformer winding, and the dielectric constant is a first dielectric constant.
In step 102, a ratio value of a transformer winding scale model to be manufactured and an actual transformer winding model is set.
In step 103, the dielectric constant of the insulating liquid in the transformer winding scaling model is calculated according to the first dielectric constant and the set proportional value, and the dielectric constant is set as a second dielectric constant.
And 104, manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling.
In step 105, the transformer winding manufactured by the scaling is uniformly wound on the framework, a high-voltage lead of the transformer winding is led out of the oil tank through a high-voltage bushing, and the oil tank is filled with liquid with the second dielectric constant serving as insulating liquid.
Fig. 2 is a schematic structural diagram of a scaled model for making a transformer winding according to a preferred embodiment of the present invention. As shown in fig. 2, the scaled transformer winding 151 is uniformly wound around the bobbin 152, and the high-voltage lead of the transformer winding is led out of the oil tank 153 through the high-voltage bushing 154, and the oil tank 153 is filled with a liquid having a second dielectric constant as an insulating liquid 155.
Preferably, the setting of the ratio of the transformer winding scale model to be manufactured to the transformer winding model comprises:
setting the diameter of the transformer winding scaling model to be smaller than that of the actual transformer winding by k 1 Multiple, small radial turns k 2 Multiple, small height k 3 Doubling;
the diameter of the iron core of the transformer winding scaling model is set to be smaller than that of the iron core of the actual transformer winding by k 1 Doubling;
the diameter of the oil tank for setting the transformer winding scaling model is smaller than that of the actual transformer winding by k 1 And (4) doubling.
Preferably, the dielectric constant of the insulating liquid in the transformer winding scaling model is calculated according to the first dielectric constant and the set proportional value, and the calculation formula is as follows:
in the formula, epsilon 0 Is the first dielectric constant and epsilon is the dielectric constant of the insulating liquid in the scaled model of the transformer winding.
When the transformer winding scaling model is smaller than the diameter of the actual transformer winding by k 1 Small k times radial turns 2 Multiple, small height k 3 Small diameter k of iron core 1 Multiple, small oil tank diameter k 1 During doubling, a simplified transformer winding scaling model is manufactured, the inductance and the capacitance of the scaling model are both smaller than the parameters of the original model, wherein the inductance is reduced by a factor larger than the capacitance
And (4) multiplying. The capacitance increasing method is adopted to lead the reduction multiple of the inductance of the scaling model to be equal to the increase multiple of the capacitance, thereby ensuring that the resonance frequency of the scaling model is consistent with the actual winding.
Preferably, the method is when 1 ＝k 2 ＝6，k 3 And =1, when the insulating liquid in the actual transformer winding is transformer oil, the liquid distilled water is used as the insulating liquid of the transformer scaling model.
Preferably, the method adopts iron to manufacture the framework and the oil tank of the scaling model of the transformer winding, and adopts the actual transformer winding turn to wind the scaling model transformer winding.
Fig. 3 is a schematic structural diagram of a system for manufacturing a transformer winding scale model according to a preferred embodiment of the invention. A system 300 for making a scaled model of a transformer winding, said system 300 comprising:
the data measurement unit 301 is used for measuring structural parameters of an actual transformer winding and collecting a dielectric constant of insulating liquid in an oil tank of the actual transformer winding, wherein the parameters comprise the diameter, the radial turns, the height, the diameter of an iron core and the diameter of the oil tank of the transformer winding, and the dielectric constant is a first dielectric constant;
a proportion setting unit 302, which is used for setting the proportion value of the transformer winding scale model to be manufactured and the actual transformer winding model;
a data calculating unit 303, configured to calculate a dielectric constant of an insulating liquid in a transformer winding scaling model according to the first dielectric constant and a set proportional value, where the dielectric constant is set as a second dielectric constant;
the component manufacturing unit 304 is used for manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling;
and the model making unit 305 is used for uniformly winding the transformer winding with the scale ratio on the framework, leading the high-voltage lead of the transformer winding out of the oil tank through a high-voltage bushing, and filling the oil tank with liquid with the second dielectric constant as insulating liquid.
Preferably, the ratio setting unit 302 includes:
a first scaling unit 321 for setting the transformer winding scaling model to be smaller than the diameter of the actual transformer winding by k 1 Small k times radial turns 2 Multiple, small height k 3 Doubling;
a second scaling unit 322 for setting the scaling model of the transformer winding to be k smaller than the core diameter of the actual transformer winding 1 Doubling;
a third proportional unit 323 for setting the transformer winding scale model to be smaller than the tank diameter of the actual transformer winding by k 1 And (4) multiplying.
Preferably, the data calculating unit 303 calculates the dielectric constant of the insulating liquid in the transformer winding scaling model according to the first dielectric constant and the set proportional value, and the calculation formula is as follows:
in the formula, epsilon 0 And epsilon is the dielectric constant of the insulating liquid in the transformer winding scaling model.
Preferably, when the ratio setting unit 302 sets k 1 ＝k 2 ＝6，k 3 If the insulating liquid in the actual transformer winding is transformer oil, the model creation unit 305 uses liquid distilled water as the insulating liquid of the transformer scaling model based on the calculation result of the data calculation unit 303.
Preferably, the component manufacturing unit 304 uses iron to manufacture the skeleton and the oil tank of the scale model of the transformer winding, and uses the actual turns of the transformer winding to wind the scale model transformer winding.
The steps of the system for manufacturing the transformer winding scale model are the same as the steps of the method for manufacturing the transformer winding scale model, the technical effect is the same, and the details are not repeated.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (6)
1. A method of making a scaled model of a transformer winding, the method comprising:
measuring structural parameters of an actual transformer winding, and acquiring a dielectric constant of insulating liquid in an oil tank of the actual transformer winding, wherein the structural parameters comprise the diameter, the radial turns and the height of the transformer winding, the diameter of an iron core and the diameter of the oil tank, and the dielectric constant is a first dielectric constant;
setting a ratio value of a transformer winding scale model to be manufactured and an actual transformer winding model, wherein the ratio value comprises the following steps:
setting the diameter k of the transformer winding scaling model to be smaller than that of the actual transformer winding 1 Small k times radial turns 2 Multiple, small height k 3 Doubling;
the diameter of the iron core of the transformer winding scaling model is set to be smaller than that of the iron core of the actual transformer winding by k 1 Doubling;
the diameter of the oil tank for setting the transformer winding scaling model is smaller than that of the actual transformer winding by k 1 Doubling;
calculating the dielectric constant of insulating liquid in a transformer winding scaling model according to the first dielectric constant and the set proportional value, setting the dielectric constant as a second dielectric constant, and calculating according to the formula:
in the formula, epsilon 0 The dielectric constant is a first dielectric constant, and epsilon is the dielectric constant of insulating liquid in a transformer winding scaling model;
manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling;
and uniformly winding the transformer winding with the reduced ratio on the framework, leading a high-voltage lead of the transformer winding out of the oil tank through a high-voltage bushing, and filling the oil tank with liquid with a second dielectric constant as insulating liquid.
2. The method of claim 1, wherein the method is when k 1 ＝k 2 ＝6，k 3 And =1, when the insulating liquid in the actual transformer winding is transformer oil, the liquid distilled water is used as the insulating liquid of the transformer scaling model.
3. The method of claim 1, wherein the skeleton and tank of the scaled model of the transformer winding are made of iron, and the scaled model transformer winding is wound with actual transformer winding turns.
4. A system for making a scaled model of a transformer winding, the system comprising:
the data measuring unit is used for measuring the structural parameters of an actual transformer winding and acquiring the dielectric constant of insulating liquid in an oil tank of the actual transformer winding, wherein the parameters comprise the diameter, the radial turns and the height of the transformer winding, the diameter of an iron core and the diameter of the oil tank, and the dielectric constant is a first dielectric constant;
the proportion setting unit is used for setting the proportion value of the transformer winding scale model to be manufactured and the actual transformer winding model, and comprises the following steps:
a first scale unit for setting the transformer winding scale model to be smaller than the diameter of the actual transformer winding by k 1 Multiple, small radial turns k 2 Multiple, small height k 3 Doubling;
a second proportion unit for setting the transformer winding scale model to be smaller than the iron core diameter of the actual transformer winding by k 1 Doubling;
a third proportion unit for setting the scaling model of the transformer winding to be smaller than the tank diameter of the actual transformer winding by k 1 Doubling;
the data calculation unit is used for calculating the dielectric constant of the insulating liquid in the transformer winding scaling model according to the first dielectric constant and the set proportional value, the dielectric constant is set as a second dielectric constant, and the calculation formula is as follows:
in the formula, epsilon 0 The dielectric constant is a first dielectric constant, and epsilon is the dielectric constant of insulating liquid in a transformer winding scaling model;
the component manufacturing unit is used for manufacturing a transformer winding, a framework, an oil tank and a high-voltage bushing according to the actual transformer winding structural parameters and the set proportional value scaling;
and the model manufacturing unit is used for uniformly winding the transformer winding with the reduced ratio on the framework, leading the high-voltage lead of the transformer winding out of the oil tank through a high-voltage bushing, and filling the oil tank with liquid with the second dielectric constant as insulating liquid.
5. System according to claim 4, characterized in that when the scale setting unit sets k 1 ＝k 2 ＝6，k 3 And =1, when the insulating liquid in the actual transformer winding is transformer oil, the model making unit adopts liquid distilled water as the insulating liquid of the transformer scaling model according to the calculation result of the data calculating unit.
6. The system of claim 4, wherein the component fabrication unit uses iron to fabricate the bobbin and the tank of the scaled transformer winding, and the scaled transformer winding is wound using actual transformer winding turns.
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