Device, method and equipment for simulating deformation defect of transformer winding and medium

Abstract

The invention relates to the field of transformer fault diagnosis, in particular to a device, method, equipment and medium for simulating the deformation defect of a transformer winding, the device comprises a three-phase transformer, and insulation supporting strips are axially arranged in coils of the preset layer number of a high-voltage winding of the first phase of the three-phase transformer; a coil with a preset number of turns at the tail of at least one end of the second-phase low-voltage winding is freely wound; at least one end of the high-voltage winding of the second phase is provided with a height adjusting block which is used for adjusting the height of a coil in the high-voltage winding, so that the low-voltage winding and the high-voltage winding of the second phase have axial displacement; the high-voltage winding and the low-voltage winding of the third phase are normally arranged; outgoing lines of the high-voltage winding and the low-voltage winding of each phase of the three-phase transformer are led to the outer end of the box body of the three-phase transformer; according to the device for simulating the deformation defect of the transformer winding, different defect types are set at different phases, decoupling of the defects of different types of the winding can be achieved, and the influence of the deformation defect of each type of the winding on the transformer can be researched.

Description

Technical Field

[0001] The present invention relates to the field of transformer fault diagnosis, and in particular to a device, method, equipment and medium for simulating transformer winding deformation defects. Background Art

[0002] The distribution system is a key component of the power system, responsible for transmitting electric energy from the substation to the end user. Its reliability and stability directly affect the quality of electricity used by the user. Among the many distribution equipment, the distribution transformer is one of the core equipment in the distribution system. It converts higher-level voltage electric energy into lower-level voltage electric energy suitable for users, ensuring the effective transmission and utilization of electric energy. The performance and reliability of the distribution transformer are directly related to the stable operation of the distribution system. Therefore, the maintenance and management of the distribution transformer is particularly important, and it is a key link to ensure the efficient and safe operation of the entire distribution system.

[0003] During the use of distribution transformers, due to defects in the design process, short-circuit current shocks and external forces during use, insulation problems such as winding deformation often occur, including radial deformation of the winding and axial deformation of the winding. When these problems first appear, they may have little impact on the performance of the transformer and are relatively difficult to detect. However, if the condition of the transformer is not grasped in time, further deterioration of the insulation over time may lead to more serious failures, which in turn affect 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. There is a lack of research on status detection and evaluation technology before distribution transformer failures occur. In addition, if an in-service distribution transformer is selected for the experiment, 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 operation, which will affect the reliability of power supply to the power system. Summary of the invention

[0005] In order to solve the problem that the existing in-service transformers in the prior art are inconvenient to study and withdraw from operation, and the problem that the transformer winding defects cannot be studied, the present invention proposes a device for simulating transformer winding deformation defects, including a three-phase transformer, wherein:

[0006] The first phase of the three-phase transformer is used to simulate radial deformation of the winding, and the coils of the first phase high-voltage winding with the preset number of layers are provided with insulating support bars along the axial direction;

[0007] The second phase of the three-phase transformer is used to simulate axial deformation or axial displacement of the winding; when used to simulate axial deformation of the winding, at least one end of the tail of the low-voltage winding of the second phase is wound freely with a preset number of turns of coils, so that the coils with the preset number of turns at the tail 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 for adjusting the height of the coils in the high-voltage winding, so that there is an axial displacement between the low-voltage winding and the high-voltage winding of the second phase;

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

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

[0010] Optionally, the number of the insulating support bars is multiple.

[0011] Optionally, the multiple insulating support bars are arranged uniformly along the circumference.

[0012] Optionally, the diameter or the height along the circumferential radius of the insulating support bar is 2% - 5% of the diameter of the circle where it is located.

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

[0014] Optionally, the preset number of layers is 1 - 5 from the outside to the inside, so that the outer coils of the high-voltage winding of the first phase have protrusions.

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

[0016] Optionally, the coils with the preset number of turns at the tail of the low-voltage winding of the second phase are not restricted by the binding tape.

[0017] Optionally, one end of the coil with the free-wound coil at the tail of the low-voltage winding of the second phase is connected with a stretching handle for facilitating the stretching of the coil.

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

[0019] Optionally, the height adjustment block is an L-shaped cushion block. Among them, the high-voltage winding is arranged on the upper surface of the vertical part of the L-shaped cushion block, and the low-voltage winding is arranged on the upper surface of the horizontal part of the L-shaped cushion block. 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 portion, a hydraulic adjustment portion, a motor, a communication module, and a flexible insulation encapsulation layer. The hydraulic adjustment portion is provided at the lower part of the L-shaped support portion. The hydraulic adjustment portion is connected to the motor, and the motor is connected to the communication module. Among them, the upper surface of the vertical portion of the L-shaped support portion is used to support the high-voltage winding, and the upper surface of the horizontal portion of the L-shaped support portion is used to support the low-voltage winding. The communication module is used to receive communication instructions, and then control the motor to rotate forward or backward to adjust the hydraulic adjustment portion to rise or fall. The flexible insulation encapsulation layer is used to encapsulate the L-shaped support portion, the hydraulic adjustment portion, the motor, and the communication module.

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

[0022] Optionally, the lead wires of the high-voltage windings and low-voltage windings of each phase of the three-phase transformer are provided on the end cover of the box body of the three-phase transformer.

[0023] Optionally, the material of the insulating support bar is wood or plastic.

[0024] In a second aspect of the present invention, a method for simulating transformer winding deformation defects is proposed, which is implemented by using the above-mentioned device for simulating transformer winding deformation defects, and includes:

[0025] Set the adjustment height of the height adjustment block to different heights. At different heights, respectively use three-phase electricity to test the three-phase transformer to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase, and obtain the influence of winding axial displacement defects based on the voltage waveform corresponding to the second phase;

[0026] Or,

[0027] Set the adjustment height of the height adjustment block to 0, and perform different degrees of pulling on the freely wound coils of the low-voltage winding of the second phase. At different degrees of pulling, respectively use three-phase electricity to test the three-phase transformer to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase, and obtain the influence of winding axial deformation defects based on the voltage waveform corresponding to the second phase.

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

[0029] Compare the voltage waveform corresponding to the first phase with the voltage waveform corresponding to the third phase to obtain the influence of winding radial deformation defects;

[0030] Compare the second corresponding voltage waveform with the third corresponding voltage waveform to obtain the influence of the winding axial displacement defect.

[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 include:

[0032] Compare the first corresponding voltage waveform with the third corresponding voltage waveform to obtain the influence of the winding radial deformation defect;

[0033] Compare the second corresponding voltage waveform with the third corresponding voltage waveform to obtain the influence of the winding radial deformation defect.

[0034] On the other hand, the present invention also provides a computing device, including: 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 the winding deformation defect of a transformer as described above is implemented.

[0037] On the other hand, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed, a method for simulating the winding deformation defect of a transformer as described above is implemented.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] The present invention provides a device, method, equipment and medium for simulating transformer winding deformation defects, including a three-phase transformer, wherein: the first phase of the three-phase transformer is used to simulate radial deformation of the winding, and an insulating support bar is arranged axially in the coils of the preset number of layers of 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 used to simulate axial deformation of the winding, at least one end of the tail of the low-voltage winding of the second phase has a preset number of turns of coils wound freely, so that the preset number of turns of coils at the tail can be tightened and extruded 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 for adjusting the height of the coils in the high-voltage winding, so that there is an axial displacement between the low-voltage winding and the high-voltage winding of the second phase; the high-voltage winding and the low-voltage winding of the third phase of the three-phase transformer are set normally; the lead-out wires of the high-voltage windings and the low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer box body; the device for simulating transformer winding deformation defects of the present invention sets different defect types in different phases, can achieve decoupling between different types of winding defects, helps to study the influence of each type of winding deformation defect on the transformer. Therefore, through this device, the problem that it is inconvenient to study and withdraw from operation for in-service transformers can be solved, providing a theoretical basis for the condition assessment of in-service transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic external view of the S20-M.RL-100 / 10-NX2 model transformer proposed by the present invention;

[0041] Figure 2 is a schematic internal structure view of the S20-M.RL-100 / 10-NX2 model transformer proposed by the present invention;

[0042] Figure 3 is a simplified top view of the S20-M.RL-100 / 10-NX2 model transformer proposed by the present invention;

[0043] Figure 4 is a schematic structure view of the radial deformation of the winding proposed by the present invention;

[0044] Figure 5 is a schematic structure view of the high-voltage winding of phase B after adding a spacer block proposed by the present invention;

[0045] Figure 6 is a schematic structure view of the electronic equipment proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The present invention provides a device, method, equipment and medium for simulating winding deformation defects of a transformer. The device for simulating winding deformation defects of a transformer is preset with various common winding deformation defects. By testing and analyzing the device, explicit characteristics and variation rules of winding deformation evolution can be summarized, which can be used as the basis for state detection and evaluation before transformer faults occur in the power grid. Specifically, by setting different types of winding deformation defects on each phase of the transformer, while covering common defects, decoupling between defects is achieved, which is helpful for studying the influence of each type of winding deformation defect on the transformer. Therefore, through this device, the problems that in-service transformers are inconvenient to study and need to be taken out of operation can be solved, providing a theoretical basis for the state evaluation of in-service transformers.

[0047] Embodiment 1:

[0048] A device for simulating winding deformation defects of a transformer, as Figure 1 shown, includes a three-phase transformer, wherein:

[0049] The first phase of the three-phase transformer is used to simulate radial deformation of the winding. An insulating support bar is arranged axially in the coils of the preset number of layers of the high-voltage winding of the first phase.

[0050] The second phase of the three-phase transformer is used to simulate axial deformation of the winding or axial displacement; when used to simulate axial deformation of the winding, at least one end of the tail of the low-voltage winding of the second phase has a preset number of turns of coils wound freely, so that the preset number of turns of coils at the tail can be tightened and squeezed to achieve axial deformation; when used to simulate axial displacement of the winding, a height adjustment block is provided at at least one end of the high-voltage winding of the second phase, which is used to adjust the height of the coils in the high-voltage winding, so that there is an axial displacement between the low-voltage winding and the high-voltage winding of the second phase.

[0051] The high-voltage winding and the low-voltage winding of the third phase of the three-phase transformer are set normally.

[0052] The lead wires of the high-voltage windings and the low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer box body.

[0053] In a further preferred solution, the number of the insulating support bars is multiple. Further preferably, the multiple insulating support bars are evenly arranged along the circumference where they are located. For example, 3 insulating support bars are selected, and the included angle between every two insulating support bars is 120°. The material of the insulating support bar is wood or plastic.

[0054] In a further preferred solution, the diameter or the height along the circumferential radius of the insulating support bar is 2% - 5% of the diameter of the circumference where it is located. In this way, it can not only ensure obvious deformation along the radial direction, but also ensure that the rest of the coils have no large difference from the normal situation, which is more in line with the actual situation.

[0055] The length of the insulating support bar is the same as the axial arrangement length of the winding it supports. If it is shorter than the axial arrangement length of the winding, some windings at the edge will not be stretched out. If it is longer than the axial arrangement length of the winding, it will squeeze other components in the fuel tank.

[0056] In a further preferred solution, the number of insulating support strips is equal to the number of winding fixing straps.

[0057] In a further preferred solution, 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 bulge. For example, an insulating support bar is provided in the third-to-last layer.

[0058] In a further preferred solution, the end cap of the second phase low-voltage winding is placed with a preset number of turns in advance, so that the coil with the preset number of turns can be pulled out, and a handle can be connected to the end of the winding to facilitate pulling out. Thus, the coil with the preset number of turns at the end is not restricted by the end cap and can be pulled out freely, which can simulate the influence of axial deformation.

[0059] In a further preferred solution, 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 tape.

[0060] In a further preferred embodiment, the tail of the low-voltage winding of the second phase is provided with a coil end portion at one end of a freely wound coil, and a stretching handle is connected to the coil end portion to facilitate the stretching of the coil.

[0061] In a further preferred solution, the preset number of turns is 3 to 5. If the number of turns is lower than the range, the deformation is not obvious and the deformation defect cannot be clearly identified. If the number of turns is higher than the range, it is difficult to pull out.

[0062] In a further preferred scheme, the height adjustment block is an L-shaped pad, wherein the high-voltage winding is arranged on the upper surface of the vertical part of the L-shaped pad, and the low-voltage winding is arranged 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.

[0063] In another embodiment, the height adjustment block includes an L-shaped support portion, a hydraulic adjustment portion, a motor, a communication module and a flexible insulating packaging layer, wherein the hydraulic adjustment portion is arranged at the lower portion of the L-shaped support portion, the hydraulic adjustment portion is connected to the motor, and the motor is connected to the communication module, wherein the upper surface of the vertical portion of the L-shaped support portion is used to support the high-voltage winding, and the upper surface of the horizontal portion of the L-shaped support portion is used to support the low-voltage winding, and the communication module is used to receive communication instructions, thereby controlling the motor to rotate forward or reverse to adjust the hydraulic adjustment portion to rise or fall, and the flexible insulating packaging layer is used to encapsulate the L-shaped support portion, the hydraulic adjustment portion, the motor and the communication module. The hydraulic adjustment portion can be a hydraulic rod.

[0064] In a further preferred solution, the lead wires of the high-voltage windings and low-voltage windings of each phase of the three-phase transformer are arranged on the end covers of the box body of the three-phase transformer.

[0065] In a further preferred solution, the three-phase magnetic circuits of the three-phase transformer are symmetrical, avoiding the influence of asymmetrical magnetic circuits on the voltage waveform.

[0066] In this embodiment, in order to make the research results more universal, a 10kV / 100kVA distribution transformer standardized by the State Grid is selected for research. The specific model is: S20-M.RL-100 / 10-NX2, ±2×2.5%. This type of transformer uses a silicon steel three-dimensional wound core, ensuring the symmetry of the three-phase magnetic circuits of the transformer and controlling the variable of the magnetic circuit for this research. The appearance, internal structure, and top view schematic diagram of this type of transformer are as follows Figures 1 to 3 shown.

[0067] When producing the prototype, the following treatments are carried out on the three phases of this transformer respectively.

[0068] Phase A: No treatment is done, serving as a normal control group, that is, taking Phase A as the third phase mentioned above;

[0069] Phase B: The winding can undergo axial deformation and axial displacement, that is, taking Phase B as the second phase mentioned above;

[0070] Phase C: The winding can undergo radial deformation, that is, taking Phase C as the first phase mentioned above.

[0071] Wind Phase C first. As Figure 4 shown, place three laminated wood spacer bars with a thickness of 10 mm and a width of 10 mm equidistantly on the circumference of the third layer from the bottom of the high-voltage winding of Phase C, and continue to wind the remaining windings to make the outer three layers of windings radially convex. Knock the two sides of the convex position flat with a rubber hammer.

[0072] Wind the Phase B coil. Place the upper turn of the second layer of the low-voltage winding of the Phase B coil three turns in advance, and at the same time cancel the axial binding band, so that the three turns of the wire at the end of the low-voltage winding can be pulled out. Axial deformation of the winding can be achieved by pulling outwards, and the degree of axial deformation can be changed by controlling the number of times of pulling outwards.

[0073] Loosely wind at the main control oil duct position of the Phase B coil, and reset the laminated wood spacer blocks during the body assembly process. As Figure 5As shown in the figure, by controlling the height of the wooden spacer block, a certain height difference is created between the high and low windings, thereby simulating the axial displacement between the high-voltage winding and the low-voltage winding of the transformer. Multiple sets of axial laminated spacer blocks can be equipped as needed, and the axial displacement amount can be adjusted by replacing the spacer blocks. For example, if laminated spacer blocks of 20mm, 15mm, and 10mm are set, as shown in Table 1 below, the corresponding displacement amounts are 20mm, 15mm, and 10mm, which can be used to study the influence of the axial displacement degree on the transformer.

[0074] Table 1

[0075]

[0076] Finally, wind the phase A coil as a normal control group, and its test results are used to compare with the test results of the defective-phase winding, so as to study the influence of winding deformation on the transformer.

[0077] To facilitate the application of excitation to the defective phases of the transformer respectively, so as to achieve decoupling between the defects, it is selected to lead out all the leads of the high-voltage winding and the low-voltage winding to the tank cover and make joints (6 for high voltage and 6 for low voltage). In this way, single-phase power supply or three-phase power supply can be realized, and the connection group number of the transformer can be adjusted by itself, which is more convenient for research.

[0078] In summary, the present invention sets different types of winding deformation defects on each phase of the transformer, including winding radial deformation, winding axial deformation, and winding axial displacement. While covering common defects, decoupling between the defects is achieved, which helps to study the influence of each type of winding deformation defect on the transformer; by formulating a detailed prototype customization plan to customize the prototype for experiments, the problems of inconvenient research and withdrawal from operation of in-service transformers are solved, providing a theoretical basis for the condition assessment of in-service transformers.

[0079] Embodiment 2:

[0080] Based on the same inventive concept, the present invention also provides a method for simulating winding deformation defects of a transformer, which is implemented by using the above-mentioned device for simulating winding deformation defects of a transformer, including:

[0081] Set the adjustment height of the height adjustment block to different heights. At different heights, test the three-phase transformer with three-phase electricity respectively to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of the winding radial deformation defect based on the voltage waveform corresponding to the first phase, and obtain the influence of the winding axial displacement defect based on the voltage waveform corresponding to the second phase;

[0082] Or,

[0083] Set the adjustment height of the height adjustment block to 0, and pull the freely wound coil of the low-voltage winding of the second phase to different degrees. Under different degrees of pulling, use three-phase electricity to test the three-phase transformer respectively to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of the winding radial deformation defect based on the voltage waveform corresponding to the first phase, and obtain the influence of the winding axial deformation defect based on the voltage waveform corresponding to the second phase.

[0084] In a further preferred solution, obtaining the influence of the winding radial deformation defect based on the voltage waveform corresponding to the first phase and obtaining the influence of the winding axial displacement defect based on the voltage waveform corresponding to the second phase specifically include:

[0085] Compare the voltage waveform corresponding to the first phase with the voltage waveform corresponding to the third phase to obtain the influence of the winding radial deformation defect;

[0086] Compare the voltage waveform corresponding to the second phase with the voltage waveform corresponding to the third phase to obtain the influence of the winding axial displacement defect.

[0087] In a further preferred solution, obtaining the influence of the winding radial deformation defect based on the voltage waveform corresponding to the first phase and obtaining the influence of the winding axial deformation defect based on the voltage waveform corresponding to the second phase specifically include:

[0088] Compare the voltage waveform corresponding to the first phase with the voltage waveform corresponding to the third phase to obtain the influence of the winding radial deformation defect;

[0089] Compare the voltage waveform corresponding to the second phase with the voltage waveform corresponding to the third phase to obtain the influence of the winding radial deformation defect.

[0090] Embodiment 3

[0091] As Figure 6 shown, the present invention also provides an electronic device, which may be a computer device, a single-chip microcomputer device, a smart mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected by a bus; the memory can be used to store an execution program, and an exemplary execution 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, and the data can be called and / or modified when the instructions are executed.

[0092] The processor may be a Central Processing Unit (CPU), or may also 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 core and control core of the terminal, and 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 the deformation defect of the transformer winding in the above embodiments.

[0093] Embodiment 4

[0094] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device-readable storage medium (Memory). The electronic device-readable storage medium is a memory device in the electronic device, used to store programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device, and of course, can also include the extended storage medium supported by the electronic device. The storage medium provides a storage space, and this storage space stores the operating system of the terminal. And, one or more instructions suitable for being loaded and executed by the processor are also stored in this storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory, or a non-volatile memory, such as at least one disk memory. By the processor loading and executing one or more instructions stored in the storage medium, the steps of the method for simulating the deformation defect of the transformer winding in the above embodiments can be implemented.

[0095] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0096] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general purpose computers, special purpose computers, embedded processors, or other programmable data processing devices to produce a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in the flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in multiple blocks.

[0097] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means for implementing the functions specified in the flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in multiple blocks.

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or means for implementing the functions specified in multiple blocks.

[0099] The above are only embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A device for simulating the deformation defects of a transformer winding, characterized in that, Comprising a three-phase transformer, wherein: The first phase of the three-phase transformer is used to simulate radial deformation of the winding. An insulating support bar is axially arranged in the coil of the preset number of layers of the high-voltage winding of the first phase; The second phase of the three-phase transformer is used to simulate axial deformation of the winding or axial displacement of the winding. When used to simulate axial deformation of the winding, at least one end of the tail of the low-voltage winding of the second phase has a preset number of turns of coils wound freely, so that the preset number of turns of coils at the tail can be tightened and extruded 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 for adjusting the height of the coils in the high-voltage winding, so that there is an axial displacement between the low-voltage winding and the high-voltage winding of the second phase; The high-voltage winding and the low-voltage winding of the third phase of the three-phase transformer are set normally; The lead wires of the high-voltage windings and the low-voltage windings of each phase of the three-phase transformer are led to the outer end of the three-phase transformer box body.

2. The device for simulating the deformation defect of a transformer winding according to claim 1, wherein The number of the insulating support bars is multiple.

3. The device for simulating the deformation defect of a transformer winding according to claim 2, characterized in that, The multiple insulating support bars are evenly arranged along the circumference.

4. The device for simulating the deformation defect of a transformer winding according to claim 1, wherein, The diameter of the insulating support bar or the height along the circumferential radial direction is 2% - 5% of the diameter of the circumference where it is located.

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

6. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The preset number of layers is 1 - 5 layers from the outside to the inside, so that the outer coils of the high-voltage winding of the first phase have protrusions.

7. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The end cover of the low-voltage winding of the second phase is arranged outside the preset number of turns of coils, so that the preset number of turns of coils can be pulled out without being restricted by the end cover.

8. The device for simulating the winding deformation defect of a transformer according to claim 1 or 7, characterized in that The preset number of turns of coils at the tail of the low-voltage winding of the second phase is not restricted by the binding tape.

9. The device for simulating the deformation defect of a transformer winding according to claim 1 or 7, characterized in that, One end of the coil at the tail of the low-voltage winding of the second phase where the freely wound coil is provided is connected with a stretching handle for facilitating the stretching of the coil.

10. The device for simulating the deformation defect of a transformer winding according to claim 7, characterized in that, The preset number of turns is 3 - 5.

11. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The height adjustment block is an L-shaped cushion block. Among them, the high-voltage winding is arranged on the upper surface of the vertical part of the L-shaped cushion block, and the low-voltage winding is arranged on the upper surface of the horizontal part of the L-shaped cushion block. The height difference between the upper surface of the vertical part and the upper surface of the horizontal part is the adjustment height.

12. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The height adjustment block includes an L-shaped support part, a hydraulic adjustment part, a motor, a communication module and a flexible insulation encapsulation layer. The hydraulic adjustment part is arranged at the lower part of the L-shaped support part. The hydraulic adjustment part is connected with the motor, and the motor is connected with the communication module. Among them, the upper surface of the vertical part of the L-shaped support part is used to support the high-voltage winding, the upper surface of the horizontal part of the L-shaped support part is used to support the low-voltage winding. The communication module is used to receive communication instructions, and then control the motor to rotate forward or backward to adjust the hydraulic adjustment part to rise or fall. The flexible insulation encapsulation layer is used to encapsulate the L-shaped support part, the hydraulic adjustment part, the motor and the communication module.

13. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The three-phase magnetic circuits of the three-phase transformer are symmetrical.

14. The device for simulating the deformation defect of the transformer winding according to claim 1, characterized in that, The lead wires of the high-voltage windings and the low-voltage windings of each phase of the three-phase transformer are arranged on the end cover of the three-phase transformer box body.

15. The device for simulating the deformation defect of a transformer winding according to claim 1, characterized in that, The material of the insulating support bar is wood or plastic.

16. A method for simulating the deformation defect of a transformer winding, characterized in that Implemented by using the device for simulating defects in transformer winding deformation according to any one of claims 1 - 15, including: Set the adjustment heights of the height adjustment blocks to different heights. At different heights, test the three-phase transformer using three-phase electricity respectively to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase, and obtain the influence of winding axial displacement defects based on the voltage waveform corresponding to the second phase; Or, Set the adjustment height of the height adjustment block to 0, and perform different degrees of pulling on the freely wound coils of the low-voltage winding of the second phase. At different degrees of pulling, test the three-phase transformer using three-phase electricity respectively to obtain the voltage waveforms of each phase, analyze the voltage waveforms, and then obtain the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase, and obtain the influence of winding axial deformation defects based on the voltage waveform corresponding to the second phase.

17. The method for simulating the deformation defect of a transformer winding according to claim 16, wherein, The obtaining the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase and obtaining the influence of winding axial displacement defects based on the voltage waveform corresponding to the second phase specifically include: Compare the voltage waveform corresponding to the first phase with the voltage waveform corresponding to the third phase to obtain the influence of winding radial deformation defects; Compare the voltage waveform corresponding to the second phase with the voltage waveform corresponding to the third phase to obtain the influence of winding axial displacement defects.

18. The method for simulating the deformation defect of a transformer winding according to claim 16, wherein, The obtaining the influence of winding radial deformation defects based on the voltage waveform corresponding to the first phase and obtaining the influence of winding axial deformation defects based on the voltage waveform corresponding to the second phase specifically include: Compare the voltage waveform corresponding to the first phase with the voltage waveform corresponding to the third phase to obtain the influence of winding radial deformation defects; Compare the voltage waveform corresponding to the second phase with the voltage waveform corresponding to the third phase to obtain the influence of winding radial deformation defects.

19. A computer device, characterized in that, Comprising: At least one processor and a memory; The memory and the processor are connected by a bus; The memory is used for storing one or more programs; When the one or more programs are executed by the at least one processor, the method for simulating transformer winding deformation defects as described in any one of claims 16 to 18 is implemented.

20. A computer-readable storage medium, characterized in that, There is an execution program stored thereon, and when the execution program is executed, the method for simulating transformer winding deformation defects as described in any one of claims 16 to 18 is implemented.

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