A transformer oil tank loss measurement method, device, terminal equipment and storage medium

Abstract

The present invention discloses a transformer tank loss measurement method, device, terminal device, and storage medium. The method obtains internal tank data and then divides the tank rear wall into a predetermined number of equally spaced segments along the height direction to obtain a plurality of equally spaced segments. When the tank rear wall is pre-installed with a plurality of magnetic shielding strips, the method calculates the tank loss value based on the transformer type information, the plywood material information, the width of the tank rear wall, a first height, a predetermined power supply frequency, and the magnetic flux of each equally spaced segment. When the tank rear wall is pre-installed with a plurality of copper shielding strips, the method calculates the tank loss value based on the height of the tank rear wall, a first height, the width of the tank rear wall, the thickness of the tank rear wall, the current density, the transformer type information, the predetermined power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equally spaced segment parallel to the tank rear wall. By implementing the present invention, tank loss can be effectively calculated.

Description

Technical Field

[0001] The present invention relates to the field of transformer optimization, and in particular to a transformer oil tank loss measurement method, device, terminal equipment and storage medium. Background Art

[0002] In the power industry, as transformer capacity and voltage levels increase, the problem of magnetic field leakage is becoming increasingly prominent. This is primarily because magnetic field leakage not only generates significant eddy current losses in the transformer's structural components, but can also lead to excessive temperature rise in areas of high magnetic flux density. This high temperature not only represents energy loss but can also cause localized overheating of the transformer's structural components, accelerating insulation aging and shortening the transformer's service life. Therefore, to improve the efficiency and lifespan of power transformers, the industry generally adopts the method of installing shielding on the oil tank to control magnetic field leakage and reduce eddy current losses.

[0003] However, while this method is effective, it also presents a new challenge: how to accurately calculate the losses in the oil tank after shielding is installed. Currently, this calculation has not been fully resolved, and it remains a pressing challenge within the industry. Accurately calculating the losses in the oil tank will allow for a better assessment of the actual effectiveness of shielding, helping manufacturers make more cost-effective decisions regarding materials and designs, reducing manufacturing and maintenance costs, optimizing designs, and further improving the energy efficiency and reliability of transformers. Summary of the Invention

[0004] The present invention provides a transformer oil tank loss measurement method, device, terminal equipment and storage medium. The method can accurately calculate the loss value of the oil tank according to different shielding conditions, thereby better evaluating the actual shielding effect.

[0005] An embodiment of the present invention provides a method for measuring transformer tank loss, comprising:

[0006] Obtaining the number of segment divisions, transformer type information, clamp material information, height of the oil tank rear wall, width of the oil tank rear wall, thickness of the oil tank rear wall, preset power frequency, current density of the winding in the transformer, and magnetic field distribution type in the transformer;

[0007] According to a preset number of segment divisions, the rear wall of the fuel tank is divided into equal intervals along the height direction to obtain a plurality of equal interval segments; wherein the height of each equal interval segment corresponds to the first height;

[0008] In a case where a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank, the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank is calculated based on the first magnetic induction intensity, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the rear wall of the fuel tank, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment.

[0009] When several copper shielding strips are pre-installed on the rear wall of the oil tank, the tank loss value is calculated based on the height of the rear wall of the oil tank, the first height, the width of the rear wall of the oil tank, the thickness of the rear wall of the oil tank, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the oil tank.

[0010] Furthermore, the calculating of the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank according to the first magnetic induction intensity of each equidistant segment, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp includes:

[0011] Calculate the first magnetic induction intensity perpendicular to each equidistant segment in the rear wall of the fuel tank;

[0012] Calculating the surface area of ​​each equidistant segment according to the first height and the width of the rear wall of the fuel tank;

[0013] The magnetic flux of each equidistant segment is calculated according to the surface area of ​​each equidistant segment, the material information of the clamp, and the first magnetic induction intensity of each equidistant segment.

[0014] Furthermore, the calculating of the fuel tank loss value based on the first height, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the fuel tank rear wall includes:

[0015] Calculate the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the fuel tank;

[0016] Determining an error correction coefficient and a unit volume loss of a structure formed by the fuel tank rear wall and the copper shielding strip according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power frequency, and the current density;

[0017] The tank loss value is calculated based on the type information of the transformer, the area of ​​each equidistant segment, the thickness information of the rear wall of the tank, the second magnetic induction intensity, the preset power supply frequency, the magnetic field distribution type, the error correction coefficient, and the unit volume loss of the structural component.

[0018] Furthermore, determining the error correction coefficient according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power supply frequency, and the current density includes:

[0019] Calculating the ratio of the height of the fuel tank rear wall to the width of the fuel tank rear wall to determine the aspect ratio of the fuel tank rear wall;

[0020] Calculating the product of the height of the fuel tank rear wall and the thickness of the fuel tank rear wall to obtain the lateral area of ​​the fuel tank rear wall;

[0021] Calculating a ratio of the current density to the side area to determine a first ratio;

[0022] A ratio of the aspect ratio and the first ratio is calculated, and the ratio is used as an error correction coefficient.

[0023] Furthermore, determining the unit volume loss of the structure formed by the fuel tank rear wall and the copper shielding strip according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power supply frequency, and the current density includes:

[0024] calculating a second ratio of the thickness of the fuel tank rear wall to the height of the fuel tank rear wall;

[0025] Calculating a first product value of the square of the height of the rear wall of the fuel tank and the preset power frequency;

[0026] calculating a third ratio of the current density to the first product value;

[0027] Obtaining the electric field strength of the structure formed by the fuel tank rear wall and the copper shielding strip according to the third ratio;

[0028] The unit volume loss of the structure formed by the rear wall of the fuel tank and the copper shielding strip is determined according to the second ratio and the electric field strength.

[0029] Furthermore, the fuel tank loss value when a number of magnetic shielding strips are pre-installed on the rear wall of the fuel tank is calculated using the following formula:

[0030]

[0031] Wherein, G represents the type information of the transformer; C1 represents the first preset empirical coefficient; n represents the number of preset segment divisions; k2 represents the plywood material information; b t Indicates the width of the rear wall of the fuel tank; Δl k represents the first height; f represents the preset power frequency; Φ(k) represents the magnetic flux of the kth equidistant segment.

[0032] Furthermore, the fuel tank loss value when a number of copper shielding strips are pre-installed on the rear wall of the fuel tank is calculated using the following formula:

[0033]

[0034] Among them, G represents the type information of the transformer; n represents the number of preset segment divisions; a t Indicates the thickness of the rear wall of the fuel tank; b t Indicates the width of the rear wall of the fuel tank; Δl k Indicates the first height; B x (k) represents the second magnetic induction intensity of the kth equidistant segment parallel to the rear wall of the fuel tank; f represents the preset power supply frequency; Eddy represents the unit volume loss of the structural component; ERROR represents the error correction coefficient; COR represents the magnetic field distribution type.

[0035] An embodiment of the present invention further provides a transformer tank loss measurement device, comprising: a data acquisition module, an equidistant segment division module, a first tank loss value calculation module, and a second tank loss value calculation module;

[0036] Obtaining the number of segment divisions, transformer type information, clamp material information, height of the oil tank rear wall, width of the oil tank rear wall, thickness of the oil tank rear wall, preset power frequency, current density of the winding in the transformer, and magnetic field distribution type in the transformer;

[0037] According to a preset number of segment divisions, the rear wall of the fuel tank is divided into equal intervals along the height direction to obtain a plurality of equal interval segments; wherein the height of each equal interval segment corresponds to the first height;

[0038] In a case where a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank, the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank is calculated based on the first magnetic induction intensity, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the rear wall of the fuel tank, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment.

[0039] When several copper shielding strips are pre-installed on the rear wall of the oil tank, the tank loss value is calculated based on the height of the rear wall of the oil tank, the first height, the width of the rear wall of the oil tank, the thickness of the rear wall of the oil tank, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the oil tank.

[0040] The present application also provides a terminal device, including:

[0041] one or more processors;

[0042] a memory, coupled to the processor, for storing one or more programs;

[0043] When the one or more programs are executed by the one or more processors, the one or more processors implement the transformer tank loss measurement method as described in the above-mentioned embodiment of the invention.

[0044] The present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the transformer tank loss measurement method as described in the above-mentioned embodiment of the invention is implemented.

[0045] The following beneficial effects are achieved by implementing the present invention:

[0046] The present invention provides a transformer oil tank loss measurement method, device, terminal equipment and storage medium. By taking the type of transformer, the material of the internal clamps of the transformer, the type of magnetic field distribution, etc. as influencing factors for loss calculation, and taking the above-mentioned influencing factors into consideration, the oil tank loss value is calculated according to the size information of the rear wall of the oil tank, the magnetic induction intensity generated when the current passes through, and the current density, etc., the loss of the oil tank after the shielding is installed is effectively calculated, which helps manufacturers to adaptively adjust the pre-installed magnetic shielding strips according to the calculated loss situation to further reduce the loss of the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 This is a flowchart of a transformer tank loss measurement method provided in one embodiment of the present application;

[0049] Figure 2 This is a schematic diagram of the installation of a shielding strip provided in one embodiment of the present application;

[0050] Figure 3 This is a schematic structural diagram of the rear wall of a fuel tank provided in one embodiment of the present application;

[0051] Figure 4 This is a structural diagram of a transformer tank loss measuring device provided in one embodiment of the present application;

[0052] Figure 5 This is a schematic diagram of the structure of a terminal device provided in a certain embodiment of the present application. DETAILED DESCRIPTION

[0053] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0056] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0060] The following are the professional terms and known technical contents involved in the embodiments of the present invention:

[0061] The shielding used in power transformers can be divided into electric shielding and magnetic shielding. Both can effectively reduce the leakage magnetic intensity on structural parts such as the transformer oil tank wall, pull plates and clamps, so that the leakage magnetic intensity on each structural part is reduced to an allowable range.

[0062] (1) The first type of shielding, electric shielding, utilizes the principle of eddy current antimagnetism. The materials used are mainly copper or aluminum with high electrical conductivity. According to the law of electromagnetic induction, alternating leakage magnetic flux will generate eddy currents on the highly conductive electric shield. The eddy currents will generate magnetic flux in the opposite direction of the leakage magnetic flux, hindering the passage of the leakage magnetic flux, achieving the effect of "blocking magnetic flux" and ultimately reducing the leakage magnetic flux of the back structure of the electric shield. Based on the principle of eddy current antimagnetism, different positions of the electric shield exhibit different shielding effects, with strong center and weak periphery characteristics.

[0063] (2) The second type of shielding, magnetic shielding, is based on the principle of magnetic shunting to reduce the magnetic flux leakage intensity of structural parts. Utilizing the low magnetic resistance of highly permeable materials, magnetic shielding is installed at locations with strong magnetic flux leakage to conduct magnetic conduction. The magnetic permeability of other structural parts of the transformer, except for the core, is weaker than that of the magnetic shielding. Therefore, most of the leakage flux is mainly closed by the magnetic shielding, so that the structural parts can be shielded. The structural part under test consists of the shielding and the rear wall of the oil tank.

[0064] See also Figure 1 , is a flow chart of a transformer tank loss measurement method provided by one embodiment of the present invention, comprising:

[0065] S1. Obtain the number of segment divisions, transformer type information, clamp material information, fuel tank rear wall height, fuel tank rear wall width, fuel tank rear wall thickness, preset power frequency, transformer winding current density, and transformer magnetic field distribution type;

[0066] Schematically, in order to accurately measure the oil tank loss, this example uses a double-core mirror method to simulate the influence of the iron core on the magnetic field. The components inside the oil tank include an excitation coil with an iron core, whose function is to generate a magnetic field to simulate the iron core and winding of the transformer, and a mirror coil with an iron core. The mirror coil is exactly the same as the excitation coil and the excitation core, and its function is to maintain the magnetic field environment of the excitation coil and the excitation core basically unchanged when the measured structural component is removed, and it also plays a measurement role; wherein the measured structural component is a combination structure of a magnetic shield and the rear wall of the oil tank or a combination structure of a copper shield and the rear wall of the oil tank, which is used to simulate the oil tank wall and oil tank shield of the transformer.

[0067] This example takes two three-phase power transformers as an example. The transformer under test, which requires loss separation, is considered to be composed of two parts. One part is the measured structure composed of the oil tank wall and the magnetic shield, and the other part is the transformer without the measured structure, which is renamed the excitation transformer (mainly composed of an iron core and windings). The leakage flux generated by the excitation transformer during operation will generate stray losses in its own structural parts and the measured structure. Another transformer that is exactly the same as the excitation transformer (with the same structure and applied excitation) is set up. The leakage flux generated by the mirror transformer can effectively maintain the constancy of the leakage magnetic environment of the excitation transformer when it switches from a loaded condition to a no-load condition. That is, the influence of the presence or absence of the measured structure on the leakage magnetic environment of the excitation transformer is eliminated, thereby ensuring the constancy of the excitation transformer loss under these two conditions.

[0068] In this example, the magnetic shield is made of highly permeable silicon steel sheets, which have strong magnetic permeability. Therefore, the leakage flux can be considered to enter the magnetic shield surface vertically. This surface is defined as the mirror plane, and the mirror plane is used as the symmetry plane. The mirror transformer is placed in a position symmetrical to the excitation transformer.

[0069] See also Figure 2 When pre-installing the magnetic shield, the magnetic shield on the rear wall of the fuel tank needs to be divided into three groups, each group includes two independent magnetic shielding strips, where the material, size and shape of each magnetic shielding strip are consistent;

[0070] See also Figure 2 Similarly, when pre-installing the copper shield, the copper shield on the rear wall of the fuel tank needs to be divided into 3 groups, each group includes 2 independent copper shielding strips, wherein the material, size and shape of each copper shielding strip are consistent;

[0071] After setting up the measurement scenario, data for measuring tank losses after pre-installing the magnetic shield needs to be collected, including: the number of segment divisions, transformer type information, clamp material information, tank rear wall height, tank rear wall width, tank rear wall thickness, preset power supply frequency, transformer winding current density, and transformer magnetic field distribution type.

[0072] Specifically, Figure 2 This is a schematic diagram of the rear wall of the fuel tank. As shown in the figure, the height of the rear wall of the fuel tank is l k , the width of the rear wall of the fuel tank is b t 、The thickness of the rear wall of the fuel tank is a t ;

[0073] Specifically, the type information of the transformer can be selected as three-phase, single-phase, and single-phase two-column;

[0074] Specifically, the material information of the clamp can be selected from Z-10 steel sheet and SS-41 hot-rolled steel plate;

[0075] Specifically, the magnetic field distribution types in the transformer include uniform distribution, "A-type" distribution and "B-type" distribution;

[0076] S2. Divide the rear wall of the fuel tank into a plurality of equally spaced segments along the height direction according to a preset number of segment divisions, to obtain a plurality of equally spaced segments; wherein the height of each equally spaced segment corresponds to the first height;

[0077] Specifically, the number of segment divisions can be adjusted according to actual conditions.

[0078] S3. When a plurality of magnetic shielding strips are pre-installed on the fuel tank rear wall, the magnetic flux of each equidistant segment perpendicular to the fuel tank rear wall is calculated based on the first magnetic induction intensity, the first height, the width of the fuel tank rear wall, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the fuel tank rear wall, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment.

[0079] In a preferred embodiment, the calculating of the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank according to the first magnetic induction intensity of each equidistant segment, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp includes:

[0080] Calculate the first magnetic induction intensity perpendicular to each equidistant segment in the rear wall of the fuel tank;

[0081] Specifically, in the process of calculating the transformer tank wall loss, the preset number of segment divisions is set to 30, which means that the tank wall can be divided into 30 equal segments along the axial direction, and the magnetic induction intensity at the center of each segment surface is calculated:

[0082]

[0083] Among them, B z (k) represents the first magnetic induction intensity of the kth equidistant segment perpendicular to the rear wall of the fuel tank; B x (k) represents the second magnetic induction intensity of the kth equidistant segment parallel to the rear wall of the fuel tank;

[0084] Then, the surface area of ​​each equidistant segment is calculated based on the first height and the width of the rear wall of the fuel tank;

[0085] Specifically, the first height is obtained by increasing the height of the rear wall of the fuel tank to k Divide by the preset number of segment divisions to obtain the first height Δl of each equidistant segment k , and according to the width b of the rear wall of the fuel tank t , solve to get the surface area of ​​each equidistant segment;

[0086] Calculating the magnetic flux of each equidistant segment according to the surface area of ​​each equidistant segment, the material information of the clamp, and the first magnetic induction intensity of each equidistant segment;

[0087] Specifically, the magnetic flux of the kth equidistant segment is:

[0088] Φ(k)=C2k1B z (k) 0.57 ;

[0089] Among them, K1 is related to the material of the clamp. When the material information of the clamp is Z-10 steel sheet, K1 is 1.5. When the material is SS-41 hot-rolled steel plate, K1 is 1. z (k) represents the first magnetic induction intensity of the kth equidistant segment perpendicular to the rear wall of the fuel tank; C2 represents the second preset empirical coefficient.

[0090] In a preferred embodiment, the fuel tank loss value when a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank is calculated by the following formula:

[0091]

[0092] Wherein, G represents the type information of the transformer; C1 represents the first preset empirical coefficient; n represents the number of preset segment divisions; k2 represents the plywood material information; b t Indicates the width of the rear wall of the fuel tank; Δl k represents the first height; f represents the preset power frequency; Φ(k) represents the magnetic flux of the kth equidistant segment;

[0093] Specifically, when the transformer type information is three-phase, G is 6; when the transformer type information is single-phase, G is 2; when the transformer type information is single-phase two-column, G is 4; f represents the frequency of the power supply, and f=50Hz;

[0094] Specifically, when the plywood material information is Z-10 steel sheet, k2 is 0.06; when the plywood material information is SS-41 hot-rolled steel plate, k2 is 1.

[0095] S4. When a plurality of copper shielding strips are pre-installed on the fuel tank rear wall, calculate the fuel tank loss value based on the height of the fuel tank rear wall, the first height, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the fuel tank rear wall;

[0096] Specifically, a d3 mm copper shield is used as the copper shield for the rear wall of the tank;

[0097] In a preferred embodiment, the calculating of the fuel tank loss value based on the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the fuel tank rear wall includes:

[0098] Calculate the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the fuel tank;

[0099] Determining an error correction coefficient and a unit volume loss of a structure formed by the fuel tank rear wall and the copper shielding strip according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power frequency, and the current density;

[0100] In a preferred embodiment, determining the error correction coefficient according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power supply frequency, and the current density includes:

[0101] Calculating the ratio of the height of the fuel tank rear wall to the width of the fuel tank rear wall to determine the aspect ratio of the fuel tank rear wall;

[0102] Specifically,

[0103] Among them, X L Indicates the width-to-height ratio of the rear wall of the fuel tank; l k Indicates the height of the rear wall of the fuel tank; b t Indicates the width of the rear wall of the fuel tank;

[0104] Calculating the product of the height of the fuel tank rear wall and the thickness of the fuel tank rear wall to obtain the lateral area of ​​the fuel tank rear wall;

[0105] Calculating a ratio of the current density to the side area to determine a first ratio;

[0106] Specifically,

[0107] Among them, X R represents the first ratio; ρ represents the current density; a t Indicates the thickness of the rear wall of the fuel tank; l k Indicates the height of the rear wall of the fuel tank;

[0108] Calculating a ratio of the aspect ratio and the first ratio, and using the ratio as an error correction coefficient;

[0109] Specifically, the error correction coefficient is calculated according to the calculated aspect ratio and the first ratio:

[0110]

[0111] Where ERROR is the error correction coefficient.

[0112] In a preferred embodiment, determining the unit volume loss of the structure formed by the fuel tank rear wall and the copper shielding strip according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power supply frequency, and the current density includes:

[0113] calculating a second ratio of the thickness of the fuel tank rear wall to the height of the fuel tank rear wall;

[0114] Specifically,

[0115] Where R a Represents the second ratio; a t Indicates the thickness of the rear wall of the fuel tank; l k Indicates the height of the rear wall of the fuel tank;

[0116] Calculating a first product value of the square of the height of the rear wall of the fuel tank and the preset power frequency;

[0117] calculating a third ratio of the current density to the first product value;

[0118] Obtaining the electric field strength of the structure formed by the fuel tank rear wall and the copper shielding strip according to the third ratio;

[0119] Specifically,

[0120] Where, E qRepresents the electric field strength of the structure; l k represents the height of the rear wall of the fuel tank; ρ represents the current density; f represents the power frequency;

[0121] Specifically, 50 here represents the operating frequency;

[0122] determining, based on the second ratio and the electric field strength, a unit volume loss of a structure formed by the fuel tank rear wall and the copper shielding strip;

[0123] Specifically, after the second ratio and the electric field strength are calculated, the final unit volume loss is determined by looking up a table.

[0124] Calculating a fuel tank loss value based on the transformer type information, the area of ​​each equidistant segment, the fuel tank rear wall thickness information, the second magnetic induction intensity, the preset power supply frequency, the magnetic field distribution type, the error correction coefficient, and the unit volume loss of the structural component;

[0125] In a preferred embodiment, the fuel tank loss value when a plurality of copper shielding strips are pre-installed on the rear wall of the fuel tank is calculated by the following formula:

[0126]

[0127] Among them, G represents the type information of the transformer; n represents the number of preset segment divisions; a t Indicates the thickness of the rear wall of the fuel tank; b t Indicates the width of the rear wall of the fuel tank; Δl k Indicates the first height; B x (k) represents the second magnetic induction intensity of the kth equidistant segment parallel to the rear wall of the fuel tank; f represents the preset power frequency; Eddy represents the unit volume loss of the structural component; ERROR represents the error correction coefficient; COR represents the magnetic field distribution type;

[0128] Specifically, when the magnetic field distribution type is uniform, the COR is 1; when the magnetic field distribution type is "type A", the COR is 0.37; when the magnetic field distribution type is "type B", the COR is

[0129]

[0130] See Figure 3 , is a transformer tank loss measurement device provided by a certain embodiment of the present application, comprising: a data acquisition module, an equidistant segment division module, a first tank loss value calculation module, and a second tank loss value calculation module;

[0131] Obtaining the number of segment divisions, transformer type information, clamp material information, height of the oil tank rear wall, width of the oil tank rear wall, thickness of the oil tank rear wall, preset power frequency, current density of the winding in the transformer, and magnetic field distribution type in the transformer;

[0132] According to a preset number of segment divisions, the rear wall of the fuel tank is divided into equal intervals along the height direction to obtain a plurality of equal interval segments; wherein the height of each equal interval segment corresponds to the first height;

[0133] In a case where a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank, the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank is calculated based on the first magnetic induction intensity, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the rear wall of the fuel tank, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment.

[0134] When several copper shielding strips are pre-installed on the rear wall of the oil tank, the tank loss value is calculated based on the height of the rear wall of the oil tank, the first height, the width of the rear wall of the oil tank, the thickness of the rear wall of the oil tank, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the oil tank.

[0135] See also Figure 3 , an embodiment of the present application further provides a terminal device, including:

[0136] one or more processors;

[0137] a memory, coupled to the processor, for storing one or more programs;

[0138] When the one or more programs are executed by the one or more processors, the one or more processors implement the transformer tank loss measurement method as described above.

[0139] The processor is used to control the overall operation of the terminal device to complete all or part of the steps of the above-mentioned transformer tank loss measurement method. The memory is used to store various types of data to support the operation of the terminal device. Such data may include, for example, instructions for any application or method operating on the terminal device, as well as application-related data. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0140] In an exemplary embodiment, the terminal device can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the transformer tank loss measurement method described in any of the above embodiments and achieve the same technical effect as the above method.

[0141] In another exemplary embodiment, a computer-readable storage medium including a computer program is further provided. When executed by a processor, the computer program implements the steps of the transformer tank loss measurement method described in any of the aforementioned embodiments. For example, the computer-readable storage medium may be the aforementioned memory including the computer program. The computer program may be executed by a processor of a terminal device to implement the transformer tank loss measurement method described in any of the aforementioned embodiments and achieve the same technical effects as the aforementioned methods.

[0142] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for measuring transformer tank loss, characterized in that: include: Obtaining the number of segment divisions, transformer type information, clamp material information, height of the oil tank rear wall, width of the oil tank rear wall, thickness of the oil tank rear wall, preset power frequency, current density of the winding in the transformer, and magnetic field distribution type in the transformer; According to a preset number of segment divisions, the rear wall of the fuel tank is divided into equal intervals along the height direction to obtain a plurality of equal interval segments; wherein the height of each equal interval segment corresponds to the first height; In a case where a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank, the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank is calculated based on the first magnetic induction intensity, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the rear wall of the fuel tank, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment. When several copper shielding strips are pre-installed on the rear wall of the oil tank, the tank loss value is calculated based on the height of the rear wall of the oil tank, the first height, the width of the rear wall of the oil tank, the thickness of the rear wall of the oil tank, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the oil tank.

2. The transformer tank loss measurement method according to claim 1, wherein: Calculating the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank according to the first magnetic induction intensity of each equidistant segment, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp includes: Calculate the first magnetic induction intensity perpendicular to each equidistant segment in the rear wall of the fuel tank; Calculate the surface area of ​​each equidistant segment according to the height and width of the rear wall of the fuel tank; The magnetic flux of each equidistant segment is calculated according to the surface area of ​​each equidistant segment, the material information of the clamp, and the first magnetic induction intensity of each equidistant segment.

3. The transformer tank loss measurement method according to claim 2, wherein: The calculating of the fuel tank loss value according to the first height, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the fuel tank rear wall includes: Calculate the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the fuel tank; Determining an error correction coefficient and a unit volume loss of a structure formed by the fuel tank rear wall and the copper shielding strip according to the first height, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power frequency, and the current density; The tank loss value is calculated based on the type information of the transformer, the area of ​​each equidistant segment, the thickness information of the rear wall of the tank, the second magnetic induction intensity, the preset power supply frequency, the magnetic field distribution type, the error correction coefficient, and the unit volume loss of the structure.

4. The transformer tank loss measurement method according to claim 3, wherein: The determining of the error correction coefficient according to the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power frequency, and the current density includes: Calculating the ratio of the height of the fuel tank rear wall to the width of the fuel tank rear wall to determine the aspect ratio of the fuel tank rear wall; Calculating the product of the height of the fuel tank rear wall and the thickness of the fuel tank rear wall to determine the lateral area of ​​the fuel tank rear wall; Calculating a ratio of the current density to the side area to determine a first ratio; A ratio of the aspect ratio and the first ratio is calculated, and the ratio is used as an error correction coefficient.

5. The transformer tank loss measurement method according to claim 4, characterized in that: The determining, based on the height of the fuel tank rear wall, the width of the fuel tank rear wall, the thickness of the fuel tank rear wall, the preset power frequency, and the current density, of the unit volume loss of the structure formed by the fuel tank rear wall and the copper shielding strip includes: calculating a second ratio of the thickness of the fuel tank rear wall to the height of the fuel tank rear wall; Calculating a first product value of the square of the height of the rear wall of the fuel tank and the preset power frequency; calculating a third ratio of the current density to the first product value; Obtaining the electric field strength of the structure formed by the fuel tank rear wall and the copper shielding strip according to the third ratio; The unit volume loss of the structure formed by the rear wall of the fuel tank and the copper shielding strip is determined according to the second ratio and the electric field strength.

6. The transformer tank loss measurement method according to claim 5, characterized in that: The fuel tank loss value when several magnetic shielding strips are pre-installed on the rear wall of the fuel tank is calculated using the following formula: Wherein, G represents the type information of the transformer; C1 represents the first preset empirical coefficient; n represents the number of preset segment divisions; k2 represents the plywood material information; b t Indicates the width of the rear wall of the fuel tank; Δl k represents the first height; f represents the preset power frequency; Φ(k) represents the magnetic flux of the kth equidistant segment.

7. The transformer tank loss measurement method according to claim 6, characterized in that: The fuel tank loss value when several copper shielding strips are pre-installed on the rear wall of the fuel tank is calculated using the following formula: Among them, G represents the type information of the transformer; n represents the number of preset segment divisions; a t Indicates the thickness of the rear wall of the fuel tank; b t Indicates the width of the rear wall of the fuel tank; Δl k Indicates the first height; B x (k) represents the second magnetic induction intensity of the kth equidistant segment parallel to the rear wall of the fuel tank; f represents the preset power supply frequency; Eddy represents the unit volume loss of the structural component; ERROR represents the error correction coefficient; COR represents the magnetic field distribution type.

8. A transformer tank loss measuring device, characterized in that: include: A data acquisition module, an equidistant segment division module, a first fuel tank loss value calculation module, and a second fuel tank loss value calculation module; Obtaining the number of segment divisions, transformer type information, clamp material information, height of the oil tank rear wall, width of the oil tank rear wall, thickness of the oil tank rear wall, preset power frequency, current density of the winding in the transformer, and magnetic field distribution type in the transformer; According to a preset number of segment divisions, the rear wall of the fuel tank is divided into equal intervals along the height direction to obtain a plurality of equal interval segments; wherein the height of each equal interval segment corresponds to the first height; In a case where a plurality of magnetic shielding strips are pre-installed on the rear wall of the fuel tank, the magnetic flux of each equidistant segment perpendicular to the rear wall of the fuel tank is calculated based on the first magnetic induction intensity, the first height, the width of the rear wall of the fuel tank, and the material information of the clamp; and the fuel tank loss value is calculated based on the type information of the transformer, the material information of the clamp, the width of the rear wall of the fuel tank, the first height, the preset power supply frequency, and the magnetic flux of each equidistant segment. When several copper shielding strips are pre-installed on the rear wall of the oil tank, the tank loss value is calculated based on the height of the rear wall of the oil tank, the first height, the width of the rear wall of the oil tank, the thickness of the rear wall of the oil tank, the current density, the type information of the transformer, the preset power supply frequency, the magnetic field distribution type, and the second magnetic induction intensity of each equidistant segment parallel to the rear wall of the oil tank.

9. A terminal device, characterized in that: include: one or more processors; a memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the transformer tank loss measurement method according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the transformer tank loss measurement method according to any one of claims 1 to 7 is implemented.

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