Device for simulating transformer winding deformation defects

Abstract

The utility model relates to the field of transformer fault diagnosis, concretely relates to a device that simulates transformer winding deformation defect, and the device includes three -phase transformer, wherein: the high voltage winding of the first phase of three -phase transformer has the insulating support strip along the axial arrangement in the coil of the first preset layer number, the coil of the preset number of turns of the tail of at least one end of the low voltage winding of the second phase is freely wound, at least one end of the high voltage winding of the second phase is equipped with height adjusting block, is used for adjusting the height of the coil in the high voltage winding, to make the low voltage winding and the high voltage winding of the second phase exist axial displacement, the high voltage winding and the low voltage winding of the third phase are normally arranged, the outgoing line of the high voltage winding and the low voltage winding of each phase of three -phase transformer is led to the outer end of three -phase transformer box body, the device that simulates transformer winding deformation defect of the utility model sets up different defect types in different phases, can realize the decoupling between winding different type defects, is helpful to the influence of each kind winding deformation defect to transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer fault diagnosis, specifically to a device for simulating transformer winding deformation defects. Background Technology

[0002] The power distribution system is a crucial component of the power system, responsible for transmitting electrical energy from substations to end users. Its reliability and stability directly impact the quality of electricity supply for users. Among the many distribution devices, the distribution transformer is one of the core components of the distribution system. It converts higher-voltage electrical energy into lower-voltage electrical energy suitable for user use, ensuring the efficient transmission and utilization of electrical energy. The performance and reliability of the distribution transformer directly affect the stable operation of the power distribution system. Therefore, the maintenance and management of distribution transformers are particularly important and are key to ensuring the efficient and safe operation of the entire power distribution system.

[0003] During the use of distribution transformers, insulation problems such as winding deformation often occur due to design defects, short-circuit current impacts, and external forces during use. These include radial and axial deformation of the windings. When these problems first appear, they may have a small impact on the transformer's performance and are relatively difficult to detect. However, if the condition of the transformer is not monitored in time, the further deterioration of the insulation over time may lead to more serious faults, thereby affecting the safe operation of the power system.

[0004] However, due to the low cost of distribution transformers, existing research and technology focus more on emergency strategies when distribution transformer failures occur and maintenance strategies after failures occur, lacking research on condition detection and assessment technologies before distribution transformer failures occur. In addition, if an in-service distribution transformer is used for experiments, on the one hand, it is difficult for an in-service transformer to cover multiple winding deformation defects and it is also difficult to quantify the degree of deformation; on the other hand, the transformer needs to be taken out of service, which will affect the reliability of power supply in the power system. Summary of the Invention

[0005] To address the limitations of existing technologies that hinder the study of transformer winding defects due to the inconvenience of researching and decommissioning in-service transformers, this invention proposes a device for simulating transformer winding deformation defects, comprising a three-phase transformer, wherein:

[0006] The first phase of the three-phase transformer is used to simulate radial deformation of the winding, and an insulating support strip is provided along the axial direction in the coil of the first phase high-voltage winding at a predetermined layer.

[0007] The second phase of the three-phase transformer is used to simulate axial deformation or displacement of the winding. When used to simulate axial deformation of the winding, the coil with a preset number of turns at the tail end of at least one end of the low-voltage winding of the second phase is freely wound so that the coil with the preset number of turns at the tail end can be tightened and squeezed to achieve axial deformation. When used to simulate axial displacement of the winding, at least one end of the high-voltage winding of the second phase is provided with a height adjustment block to adjust the height of the coil in the high-voltage winding so that there is axial displacement between the low-voltage winding and the high-voltage winding of the second phase.

[0008] The high-voltage winding and low-voltage winding of the third phase of the three-phase transformer are normally configured.

[0009] The leads of the high-voltage and low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer housing.

[0010] Optionally, the number of insulating support strips may be multiple.

[0011] Optionally, the plurality of the insulating support strips are arranged evenly along the circumference.

[0012] Optionally, the diameter of the insulating support strip or its radial height is 2% to 5% of the diameter of the circumference.

[0013] Optionally, the length of the insulating support strip is the same as the axial arrangement length of the winding it supports.

[0014] Optionally, the preset number of layers is 1 to 5 layers from the outside to the inside, so that the outer coil of the high voltage winding of the first phase has a protrusion.

[0015] Optionally, the end cap of the low-voltage winding of the second phase is located outside the coil with a preset number of turns, so that the coil with the preset number of turns can be pulled out without being restricted by the end cap.

[0016] Optionally, the coil with a preset number of turns at the tail of the low-voltage winding of the second phase is not restricted by a binding strap.

[0017] Optionally, the tail end of the low-voltage winding of the second phase is provided with a coil end connected to a tension handle to facilitate coil tensioning.

[0018] Optionally, the preset number of turns is 3 to 5.

[0019] Optionally, the height adjustment block is an L-shaped pad, wherein the high-voltage winding is located on the upper surface of the vertical part of the L-shaped pad, the low-voltage winding is located on the upper surface of the horizontal part of the L-shaped pad, and the height difference between the upper surface of the vertical part and the upper surface of the horizontal part is the adjustment height.

[0020] Optionally, the height adjustment block includes an L-shaped support, a hydraulic adjustment unit, a motor, a communication module, and a flexible insulating encapsulation layer. The hydraulic adjustment unit is located at the lower part of the L-shaped support and is connected to the motor. The motor is connected to the communication module. The upper surface of the vertical part of the L-shaped support is used to support the high-voltage winding, and the upper surface of the horizontal part of the L-shaped support is used to support the low-voltage winding. The communication module is used to receive communication commands and control the motor to rotate forward or backward to adjust the hydraulic adjustment unit to rise or fall. The flexible insulating encapsulation layer is used to encapsulate the L-shaped support, the hydraulic adjustment unit, the motor, and the communication module.

[0021] Optionally, the three-phase magnetic circuit of the three-phase transformer is symmetrical.

[0022] Optionally, the leads of the high-voltage winding and low-voltage winding of each phase of the three-phase transformer are located on the end cover of the transformer housing.

[0023] Optionally, the insulating support strip may be made of wood or plastic.

[0024] The second aspect of this utility model provides a method for simulating transformer winding deformation defects, implemented using the aforementioned device for simulating transformer winding deformation defects, comprising:

[0025] The height adjustment block is set to different heights. At different heights, the three-phase transformer is tested with three-phase electricity to obtain the voltage waveform of each phase. The voltage waveform is analyzed, and the influence of the winding radial deformation defect is obtained based on the first corresponding voltage waveform, and the influence of the winding axial displacement defect is obtained based on the second corresponding voltage waveform.

[0026] or,

[0027] The height of the height adjustment block is set to 0. The freely wound coil of the low-voltage winding of the second phase is pulled to different degrees. Under different degrees of pulling, the three-phase transformer is tested with three-phase electricity to obtain the voltage waveform of each phase. The voltage waveform is analyzed, and then the influence of the radial deformation defect of the winding is obtained based on the first corresponding voltage waveform, and the influence of the axial deformation defect of the winding is obtained based on the second corresponding voltage waveform.

[0028] Optionally, obtaining the influence of the winding radial deformation defect based on the first corresponding voltage waveform and obtaining the influence of the winding axial displacement defect based on the second corresponding voltage waveform specifically includes:

[0029] The influence of the first corresponding voltage waveform and the third corresponding voltage waveform is obtained by comparing them.

[0030] By comparing the second corresponding voltage waveform with the third corresponding voltage waveform, the influence of the winding axial displacement defect can be obtained.

[0031] Optionally, obtaining the influence of the winding radial deformation defect based on the first corresponding voltage waveform and obtaining the influence of the winding axial deformation defect based on the second corresponding voltage waveform specifically includes:

[0032] The influence of the first corresponding voltage waveform and the third corresponding voltage waveform is obtained by comparing them.

[0033] By comparing the second corresponding voltage waveform with the third corresponding voltage waveform, the influence of the winding radial deformation defect can be obtained.

[0034] Furthermore, this utility model also provides a computing device, comprising: at least one processor and a memory;

[0035] The memory is used to store one or more programs;

[0036] When the one or more programs are executed by the one or more processors, a method for simulating transformer winding deformation defects as described above is implemented.

[0037] Furthermore, this utility model also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements a method for simulating transformer winding deformation defects as described above.

[0038] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0039] This utility model provides a device, method, equipment, and medium for simulating transformer winding deformation defects, including a three-phase transformer. The first phase of the three-phase transformer is used to simulate radial deformation of the winding, and an insulating support strip is provided axially in the coil of a predetermined number of layers in the high-voltage winding of the first phase. The second phase of the three-phase transformer is used to simulate axial deformation or axial displacement of the winding. When simulating axial deformation, at least one end of the low-voltage winding of the second phase has a predetermined number of coil turns that are freely wound, allowing the coil at the predetermined number of turns to be tightened and compressed to achieve axial deformation. When simulating axial displacement, at least one end of the high-voltage winding of the second phase has a high-strength... The height adjustment block is used to adjust the height of the coil in the high-voltage winding so that there is axial displacement between the low-voltage winding and the high-voltage winding of the second phase; the high-voltage winding and low-voltage winding of the third phase of the three-phase transformer are normally set; the lead wires of the high-voltage winding and low-voltage winding of each phase of the three-phase transformer are led to the outer end of the three-phase transformer tank; the device for simulating transformer winding deformation defects of this utility model sets different defect types in different phases, which can realize the decoupling between different types of winding defects, and help to study the impact of each type of winding deformation defect on the transformer. Therefore, this device can solve the problem that it is inconvenient to study and take off the in-service transformer, and provide a theoretical basis for the condition assessment of in-service transformers. Attached Figure Description

[0040] Figure 1 This is a simplified top view of the S20-M.RL-100 / 10-NX2 model transformer proposed in this utility model;

[0041] Figure 2 This is a schematic diagram of the radial deformation structure of the winding proposed in this utility model;

[0042] Figure 3 A schematic diagram of the structure of the high-voltage winding of phase B proposed in this utility model after adding a pad;

[0043] Figure 4 This is a schematic diagram of the electronic device proposed in this utility model. Detailed Implementation

[0044] This invention proposes a device for simulating transformer winding deformation defects. This device is pre-programmed with various common winding deformation defects. Testing and analysis of this device can summarize the explicit characteristics and changing patterns of winding deformation evolution, serving as a basis for condition detection and assessment before transformer faults occur in the power grid. Specifically, by setting different types of winding deformation defects on each phase of the transformer, common defects are covered while decoupling between defects is achieved, facilitating the study of the impact of each type of winding deformation defect on the transformer. Therefore, this device can solve the problem of inconvenient research and decommissioning of in-service transformers, providing a theoretical basis for the condition assessment of in-service transformers.

[0045] Example 1:

[0046] An apparatus for simulating transformer winding deformation defects includes a three-phase transformer, wherein:

[0047] The first phase of the three-phase transformer is used to simulate radial deformation of the winding, and an insulating support strip is provided along the axial direction in the coil of the first phase high-voltage winding at a predetermined layer.

[0048] The second phase of the three-phase transformer is used to simulate axial deformation or displacement of the winding. When used to simulate axial deformation of the winding, the coil with a preset number of turns at the tail end of at least one end of the low-voltage winding of the second phase is freely wound so that the coil with the preset number of turns at the tail end can be tightened and squeezed to achieve axial deformation. When used to simulate axial displacement of the winding, at least one end of the high-voltage winding of the second phase is provided with a height adjustment block to adjust the height of the coil in the high-voltage winding so that there is axial displacement between the low-voltage winding and the high-voltage winding of the second phase.

[0049] The high-voltage winding and low-voltage winding of the third phase of the three-phase transformer are normally configured.

[0050] The leads of the high-voltage and low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer housing.

[0051] In a further preferred embodiment, the number of insulating support strips is multiple. More preferably, the multiple insulating support strips are evenly arranged along their circumference; for example, three insulating support strips are selected, with an included angle of 120° between every two insulating support strips. The insulating support strips are made of wood or plastic.

[0052] In a further preferred embodiment, the diameter or radial height of the insulating support strip is 2% to 5% of the diameter of its circumference. This ensures significant radial deformation while maintaining that the remaining coil portion does not differ significantly from normal conditions, thus better reflecting actual circumstances.

[0053] The length of the insulating support strip is the same as the axial length of the winding it supports. If it is shorter than the axial length of the winding, some windings at the edge will not be stretched open. If it is longer than the axial length of the winding, it will squeeze other components inside the oil tank.

[0054] In a further preferred embodiment, the number of insulating support strips is equal to the number of winding fixing straps.

[0055] In a further preferred embodiment, the preset number of layers is 1 to 5 layers from the outside in, so that the outer coil of the high-voltage winding of the first phase has a protrusion. For example, an insulating support strip is provided in the third to last layer.

[0056] In a further preferred embodiment, the end cap of the low-voltage winding of the second phase is pre-positioned with a predetermined number of turns so that the coil with the predetermined number of turns can be pulled out. For easy pulling out, a handle can be connected to the end of the winding. Thus, the coil with the predetermined number of turns at the end is not restricted by the end cap and can be freely pulled out, which can simulate the effect of axial deformation.

[0057] In a further preferred embodiment, the coil with a predetermined number of turns at the tail of the low-voltage winding of the second phase is not restricted by a binding strap.

[0058] In a further preferred embodiment, the tail end of the low-voltage winding of the second phase is provided with a coil end connected to a tension handle to facilitate coil tensioning.

[0059] In a further preferred embodiment, the preset number of turns is 3 to 5. If the number of turns is less than this range, the deformation is not obvious and the deformation defect cannot be clearly identified; if the number of turns is more than this range, it is not easy to pull out and the pulling process becomes difficult.

[0060] In a further preferred embodiment, the height adjustment block is an L-shaped pad, wherein the high-voltage winding is located on the upper surface of the vertical part of the L-shaped pad, the low-voltage winding is located on the upper surface of the horizontal part of the L-shaped pad, and the height difference between the upper surface of the vertical part and the upper surface of the horizontal part is the adjustment height.

[0061] In another embodiment, the height adjustment block includes an L-shaped support, a hydraulic adjustment unit, a motor, a communication module, and a flexible insulating encapsulation layer. The hydraulic adjustment unit is located at the lower part of the L-shaped support and is connected to the motor. The motor is connected to the communication module. The upper surface of the vertical portion of the L-shaped support supports the high-voltage winding, and the upper surface of the horizontal portion supports the low-voltage winding. The communication module receives communication commands to control the motor to rotate forward or backward, thereby adjusting the rise or fall of the hydraulic adjustment unit. The flexible insulating encapsulation layer encapsulates the L-shaped support, the hydraulic adjustment unit, the motor, and the communication module. The hydraulic adjustment unit can be a hydraulic rod.

[0062] In a further preferred embodiment, the leads of the high-voltage winding and low-voltage winding of each phase of the three-phase transformer are located on the end cover of the transformer housing.

[0063] In a further preferred embodiment, the three-phase magnetic circuit of the three-phase transformer is symmetrical, thus avoiding the influence of magnetic circuit asymmetry on the voltage waveform.

[0064] In this embodiment, to make the research results more generalizable, a 10 kV / 100 kVA distribution transformer standardized by the State Grid was selected for study, specifically model S20-M.RL-100 / 10-NX2, ±2×2.5%. This transformer uses a silicon steel three-dimensional wound core, ensuring the symmetry of the transformer's three-phase magnetic circuit. This controlled for the variable of magnetic circuit in this study. A top view of this transformer model is shown below. Figure 1 As shown.

[0065] During the production of the prototype, the three phases of the transformer were treated as follows.

[0066] Phase A: No treatment is performed, serving as the normal control group, i.e., Phase A is the third phase mentioned above;

[0067] Phase B: The winding can undergo axial deformation and axial displacement, that is, Phase B is the second phase mentioned above;

[0068] C phase: The winding can undergo radial deformation, that is, the C phase is regarded as the first phase mentioned above.

[0069] Prioritize winding the C phase, such as Figure 2 As shown, three 10mm thick and 10mm wide laminated wood support strips are placed at equal intervals on the circumference of the third-to-last layer of the high-voltage winding of phase C. Continue winding the remaining windings so that the outer three layers of windings bulge radially. The two sides of the bulge are flattened with a rubber mallet.

[0070] When winding the B-phase coil, place the upper three turns of the second layer of the low-voltage winding of the B-phase coil in advance, and remove the axial binding tape at the same time, so that the three turns of wire at the end of the low-voltage winding can be pulled out. Pulling outward will cause axial deformation of the winding. The degree of axial deformation can be changed by controlling the number of times it is pulled outward.

[0071] Loosen the winding at the main control oil passage of phase B coil, and reinstall laminated wooden pads during the assembly process of the transformer body, such as... Figure 3As shown, by controlling the height of the wooden pads, a certain height difference is created between the high-voltage and low-voltage windings, thus simulating axial displacement between the high-voltage and low-voltage windings of a transformer. Multiple sets of axial laminated pads can be equipped as needed, and the axial displacement can be adjusted by changing the pads. For example, using 20mm, 15mm, and 10mm laminated pads (see Table 1 below), the corresponding displacements are 20mm, 15mm, and 10mm, which can be used to study the impact of the degree of axial displacement on the transformer.

[0072] Table 1

[0073]

[0074] Finally, the A-phase coil was wound as a normal control group, and its test results were compared with the test results of the defective phase winding to study the effect of winding deformation on the transformer.

[0075] To facilitate the separate application of excitation to the defective phases of the transformer, thereby achieving decoupling between defects, all leads of the high-voltage and low-voltage windings are led to the tank cover and made into joints (6 for high voltage and 6 for low voltage). This allows for both single-phase and three-phase power supply, and also enables the transformer's connection group number to be adjusted automatically, making research more convenient.

[0076] In summary, this invention incorporates different types of winding deformation defects on each phase of the transformer, including radial deformation, axial deformation, and axial displacement. This not only covers common defects but also decouples the defects, facilitating the study of the impact of each type of winding deformation defect on the transformer. Furthermore, by developing a detailed prototype customization plan to customize the prototype for experimentation, this invention solves the problem of inconvenient research and decommissioning of in-service transformers, providing a theoretical basis for the condition assessment of in-service transformers.

[0077] Example 2:

[0078] Based on the same inventive concept, this utility model also provides a method for simulating transformer winding deformation defects, implemented using the aforementioned apparatus for simulating transformer winding deformation defects, comprising:

[0079] The height adjustment block is set to different heights. At different heights, the three-phase transformer is tested with three-phase electricity to obtain the voltage waveform of each phase. The voltage waveform is analyzed, and the influence of the winding radial deformation defect is obtained based on the first corresponding voltage waveform, and the influence of the winding axial displacement defect is obtained based on the second corresponding voltage waveform.

[0080] or,

[0081] The height of the height adjustment block is set to 0. The freely wound coil of the low-voltage winding of the second phase is pulled to different degrees. Under different degrees of pulling, the three-phase transformer is tested with three-phase electricity to obtain the voltage waveform of each phase. The voltage waveform is analyzed, and then the influence of the radial deformation defect of the winding is obtained based on the first corresponding voltage waveform, and the influence of the axial deformation defect of the winding is obtained based on the second corresponding voltage waveform.

[0082] In a further preferred embodiment, obtaining the influence of the winding radial deformation defect based on the first corresponding voltage waveform and obtaining the influence of the winding axial displacement defect based on the second corresponding voltage waveform specifically includes:

[0083] The influence of the first corresponding voltage waveform and the third corresponding voltage waveform is obtained by comparing them.

[0084] By comparing the second corresponding voltage waveform with the third corresponding voltage waveform, the influence of the winding axial displacement defect can be obtained.

[0085] In a further preferred embodiment, obtaining the influence of the winding radial deformation defect based on the first corresponding voltage waveform and obtaining the influence of the winding axial deformation defect based on the second corresponding voltage waveform specifically includes:

[0086] The influence of the first corresponding voltage waveform and the third corresponding voltage waveform is obtained by comparing them.

[0087] By comparing the second corresponding voltage waveform with the third corresponding voltage waveform, the influence of the winding radial deformation defect can be obtained.

[0088] Example 3

[0089] like Figure 4 As shown, this utility model also provides an electronic device, which may be a computer device, a microcontroller device, a smart mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, processor, and transceiver component are connected via a bus; the memory can be used to store executable programs, and an exemplary executable program may include instructions; the processor is used to execute the instructions stored in the memory. The memory can also be used to store data, which can be accessed and / or modified when instructions are executed.

[0090] The processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, and it is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of the method for simulating transformer winding deformation defects in the above embodiments.

[0091] Example 4

[0092] Based on the same inventive concept, this utility model also provides a readable storage medium, specifically an electronic device readable storage medium (Memory). This readable storage medium is a memory device within an electronic device used to store programs and data. It is understood that the storage medium here can include both built-in storage media within the electronic device and extended storage media supported by the electronic device. The storage medium provides storage space, which stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more executable programs (including program code). It should be noted that the storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. Loading and executing one or more instructions stored in the storage medium by the processor can implement the steps of the method for simulating transformer winding deformation defects in the above embodiments.

[0093] Those skilled in the art will understand that embodiments of this invention can be provided as methods, systems, or computer program products. Therefore, this invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this invention can 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, etc.) containing computer-usable program code.

[0094] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0095] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0097] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the scope of the claims of this utility model pending approval.

Claims

1. A device for simulating deformation defects in transformer windings, characterized in that, Including three-phase transformers, of which: The first phase of the three-phase transformer is used to simulate radial deformation of the winding, and an insulating support strip is provided along the axial direction in the coil of the first phase high-voltage winding at a predetermined layer. The second phase of the three-phase transformer is used to simulate axial deformation or axial displacement of the winding. When simulating axial deformation of the winding, the coil with a preset number of turns at the tail end of at least one end of the low-voltage winding of the second phase is freely wound so that the coil with the preset number of turns at the tail end can be tightened and squeezed to achieve axial deformation. When simulating axial displacement of the winding, at least one end of the high-voltage winding of the second phase is provided with a height adjustment block to adjust the height of the coil in the high-voltage winding so that there is axial displacement between the low-voltage winding and the high-voltage winding of the second phase. The high-voltage winding and low-voltage winding of the third phase of the three-phase transformer are normally configured. The leads of the high-voltage and low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer housing. The end cap of the low-voltage winding of the second phase is located outside the coil with a preset number of turns, so that the coil with the preset number of turns can be pulled out without being restricted by the end cap.

2. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The number of insulating support strips is multiple.

3. The apparatus for simulating transformer winding deformation defects according to claim 2, characterized in that, The plurality of insulating support strips are evenly arranged along the circumference.

4. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The diameter of the insulating support strip or its radial height along the circumference is 2% to 5% of the diameter of the circumference in which it is located.

5. The apparatus for simulating transformer winding deformation defects according to claim 1 or 4, characterized in that, The length of the insulating support bar is the same as the axial length of the winding it supports.

6. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The preset number of layers is 1 to 5 layers from the outside to the inside, so that the outer coil of the high voltage winding of the first phase has a protrusion.

7. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The coil with a preset number of turns at the tail of the low-voltage winding of the second phase is not restricted by the binding strap.

8. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The low-voltage winding of the second phase has a coil end with a pull handle connected to it to facilitate coil stretching.

9. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The preset number of turns is 3 to 5.

10. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The height adjustment block is an L-shaped pad, wherein the high voltage winding is located on the upper surface of the vertical part of the L-shaped pad, the low voltage winding is located on the upper surface of the horizontal part of the L-shaped pad, and the height difference between the upper surface of the vertical part and the upper surface of the horizontal part is the adjustment height.

11. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The height adjustment block includes an L-shaped support, a hydraulic adjustment unit, a motor, a communication module, and a flexible insulating encapsulation layer. The hydraulic adjustment unit is located at the lower part of the L-shaped support and is connected to the motor. The motor is connected to the communication module. The upper surface of the vertical part of the L-shaped support is used to support the high-voltage winding, and the upper surface of the horizontal part of the L-shaped support is used to support the low-voltage winding. The communication module is used to receive communication commands and control the motor to rotate forward or backward to adjust the hydraulic adjustment unit to rise or fall. The flexible insulating encapsulation layer is used to encapsulate the L-shaped support, the hydraulic adjustment unit, the motor, and the communication module.

12. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The three-phase magnetic circuits of the three-phase transformer are symmetrical.

13. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The leads of the high-voltage and low-voltage windings of each phase of the three-phase transformer are located on the end cover of the transformer housing.

14. The apparatus for simulating transformer winding deformation defects according to claim 1, characterized in that, The insulating support strip is made of wood or plastic.

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