Distribution transformer turn-to-turn short circuit fault simulation platform and method and electronic equipment

Abstract

The invention discloses a distribution transformer turn-to-turn short circuit fault simulation platform and method and electronic equipment. The platform comprises a power supply module which comprises a three-phase voltage regulator and is used for outputting adjustable voltage to simulate different voltage operation environments of the distribution transformer; the fault module comprises a distribution transformer and a load module, the distribution transformer is internally provided with a fault coil and a normally-closed thermoswitch, and the normally-closed thermoswitch is used for being automatically switched off during short circuit so as to simulate the turn-to-turn short circuit process of the distribution transformer; the load module is an adjustable load and is used for simulating load states of the distribution transformer under different load conditions; the control system is used for controlling the power supply module, the normally-closed thermoswitch and the load module and carrying out fault simulation on the distribution transformer; the measurement module is used for collecting state detection data of the distribution transformer in the fault simulation process. The technical problem that the development process of the turn-to-turn short circuit of the distribution transformer under the operation condition is difficult to truly reflect in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of smart grids, and in particular to a distribution transformer inter-turn short-circuit fault simulation platform, method and electronic equipment. Background Art

[0002] When a short-circuit current flows through the transformer winding coil, the energy is converted into heat and mechanical energy, and this process will produce corresponding changes in physical quantities. Therefore, it is particularly important to analyze the characteristics of the physical state changes such as heating, vibration, and abnormal noise that accompany the inter-turn short-circuit process of the distribution transformer, and use the diagnosis of these physical quantities to sense the degree of the inter-turn short-circuit fault of the feedback winding coil. At present, the research on inter-turn short-circuit in related technologies mostly uses direct short-circuit to simulate faults, but in actual engineering, inter-turn short-circuit is a continuous process. Therefore, it is difficult to truly reflect the development process of inter-turn short-circuit of the distribution transformer under operating conditions when simulating the fault of the distribution transformer in related technologies.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a distribution transformer inter-turn short-circuit fault simulation platform, method and electronic equipment to at least solve the technical problem in the related art that it is difficult to truly reflect the inter-turn short-circuit development process of the distribution transformer under operating conditions.

[0005] According to one aspect of an embodiment of the present invention, a distribution transformer inter-turn short-circuit fault simulation platform is provided, comprising: a power module, the power module comprising a three-phase voltage regulator, for outputting an adjustable voltage to simulate different voltage operating environments of the distribution transformer; a fault module, the fault module comprising the distribution transformer and a load module, wherein the distribution transformer is equipped with a fault coil and a normally closed thermal switch, the normally closed thermal switch is used to automatically disconnect in the event of a short circuit to simulate the inter-turn short-circuit process of the distribution transformer; the load module is an adjustable load, for simulating the load state of the distribution transformer under different load conditions; a control system, for controlling the power module, the normally closed thermal switch and the load module, and performing fault simulation on the distribution transformer; a measurement module, for collecting state detection data of the distribution transformer during the fault simulation process, and sending the state detection data to the control system.

[0006] According to another aspect of an embodiment of the present invention, a method for simulating a turn-to-turn short-circuit fault of a distribution transformer is provided, which is applied to any one of the distribution transformer turn-to-turn short-circuit fault simulation platforms, and the method includes: controlling the output voltage of the three-phase voltage regulator in the power module to a preset voltage value to simulate different voltage operating environments of the distribution transformer; controlling the built-in fault coil and / or normally closed thermal switch of the distribution transformer in the fault module to operate to simulate the turn-to-turn short-circuit process of the distribution transformer; controlling the adjustable load in the load module to adjust to a preset load to simulate the load state of the distribution transformer under different load conditions; performing fault simulation on the distribution transformer based on the voltage operating environment, the turn-to-turn short-circuit process and the load state; collecting the state detection data of the distribution transformer during the fault simulation process through the measurement module, and sending the state detection data to the control system.

[0007] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the methods for simulating inter-turn short-circuit faults of a distribution transformer.

[0008] In an embodiment of the present invention, a distribution transformer turn-to-turn short-circuit fault simulation platform is provided, including a power module, the power module including a three-phase voltage regulator, used to output an adjustable voltage to simulate different voltage operating environments of the distribution transformer; a fault module, the fault module including the distribution transformer and a load module, wherein the distribution transformer is equipped with a fault coil and a normally closed thermal switch, the normally closed thermal switch is used to automatically disconnect in the event of a short circuit to simulate the turn-to-turn short circuit process of the distribution transformer; the load module is an adjustable load, used to simulate the load state of the distribution transformer under different load conditions; a control system, used to control the power module, the normally closed thermal switch, and the load module. The control module controls the normally closed thermal switch and the load module to simulate the fault of the distribution transformer; the measuring module is used to collect the state detection data of the distribution transformer during the fault simulation process, and send the state detection data to the control system, so as to achieve the purpose of accurately simulating the turn-to-turn short-circuit fault of the distribution transformer based on the distribution transformer turn-to-turn short-circuit fault simulation platform provided with components such as the normally closed thermal switch, the variable load, and the measuring module, thereby achieving the technical effect of accurately simulating the intermittent impact of the early stage of the transformer turn-to-turn short-circuit on the coil, and further solving the technical problem in the related technology that it is difficult to truly reflect the development process of the turn-to-turn short-circuit of the distribution transformer under the operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0010] Figure 1 is a schematic structural diagram of a distribution transformer turn-to-turn short-circuit fault simulation platform according to an embodiment of the present invention;

[0011] Figure 2 is a schematic structural diagram of an optional distribution transformer turn-to-turn short-circuit fault simulation platform according to an embodiment of the present invention;

[0012] Figure 3 is a flow chart of a method for simulating a turn-to-turn short-circuit fault of a distribution transformer according to an embodiment of the present invention;

[0013] Figure 4 is a schematic diagram of a distribution transformer turn-to-turn short-circuit fault simulation device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0015] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0016] As the most widely distributed and largest component in the power system, the operating status of the distribution network has a significant impact on the stability of the entire power system. Compared with large power transformers, distribution transformers are not only large in number, widely distributed, and require huge maintenance workload, but also directly serve end users. However, only a few key distribution transformers are currently equipped with online monitoring equipment, and most of the remaining equipment still relies on manual inspections for fault detection. At present, distribution transformer failures account for a large proportion of distribution network accidents and have become a key factor restricting the operation of distribution networks.

[0017] Among the common fault types of distribution transformers, winding insulation faults occur most frequently. The insulation faults of distribution transformer windings mainly include inter-turn short circuits, inter-layer short circuits, phase short circuits, and single-phase short circuit grounding. According to operating experience, inter-turn short circuit faults are mostly caused by long-term overvoltage or frequent short-circuit current shocks. However, the formation of inter-turn short circuit faults has a cumulative effect, and research in related technologies mostly focuses on the characteristics and detection methods of permanent inter-turn short circuits of winding turns that have already occurred. Once a permanent inter-turn short circuit occurs, it often leads to serious consequences such as tripping, explosion and fire in a short period of time, and it is difficult to recover even if the fault is detected. At present, research on inter-turn short circuit faults has not yet regarded it as a continuous accumulation process, and there is a lack of in-depth discussion on the changes in characteristic parameters and diffusion signs during the early development of the fault.

[0018] When short-circuit current flows through the transformer winding coil, energy is converted into heat and mechanical energy, and corresponding physical quantity changes will occur during this process. Therefore, it is particularly important to analyze the characteristics of physical state changes such as heating, vibration, and abnormal noise during the inter-turn short-circuit process of the distribution transformer, and use the diagnosis of these physical quantities to sense the degree of inter-turn short-circuit fault of the feedback winding coil. At present, most studies on inter-turn short-circuit use direct short-circuit to simulate faults, but in actual engineering, inter-turn short-circuit is a continuous process. Therefore, it is difficult for related technologies to truly reflect the development process of inter-turn short-circuit of distribution transformers under operating conditions.

[0019] In view of the above problems, an embodiment of the present invention provides an embodiment of a distribution transformer 2001 turn-to-turn short-circuit fault simulation platform. Figure 1 2 is a schematic diagram of the structure of a distribution transformer 2001 turn-to-turn short-circuit fault simulation platform according to an embodiment of the present invention. Figure 1 As shown, the above-mentioned distribution transformer 2001 turn-to-turn short-circuit fault simulation platform includes:

[0020] The power module 10 includes a three-phase voltage regulator for outputting an adjustable voltage to simulate different voltage operating environments of the distribution transformer 2001;

[0021] Fault module 20, fault module 20 includes distribution transformer 2001 and load module 2002, wherein distribution transformer 2001 is equipped with a fault coil and a normally closed thermal switch, and the normally closed thermal switch is used to automatically disconnect in the event of a short circuit to simulate the inter-turn short circuit process of distribution transformer 2001; load module 2002 is an adjustable load, which is used to simulate the load state of distribution transformer 2001 under different load conditions;

[0022] The control system 30 is used to control the power module 10, the normally closed thermal switch and the load module 2002, and to simulate the fault of the distribution transformer 2001;

[0023] The measurement module 40 is used to collect state detection data of the distribution transformer 2001 during the fault simulation process and send the state detection data to the control system 30 .

[0024] Optionally, in the inter-turn short-circuit fault simulation platform of the distribution transformer 2001 of the present embodiment, the power module 10 is composed of a three-phase voltage regulator, whose main function is to output an adjustable voltage to simulate the operating state of the distribution transformer 2001 at different voltage levels. The voltage regulator can manually or automatically adjust the output voltage to simulate different power grid conditions, which is the basis for conducting fault simulation experiments. The fault module 20 includes the distribution transformer 2001 itself and an adjustable load module 2002. The distribution transformer 2001 is built with a fault coil and a normally closed thermal switch. The design of the fault coil is similar to that of the transformer winding and is used to trigger and simulate inter-turn short-circuit faults. The normally closed thermal switch automatically disconnects when the temperature rises due to the short-circuit current, simulating the automatic protection mechanism of the short-circuit fault. The load module 2002 allows the experimenter to simulate the operation of the distribution transformer 2001 under different load conditions to study the impact of the load on the fault state. The control system 30, i.e., the console, is the "brain" of the experimental platform, responsible for coordinating and controlling the operation of the power module 10, the normally closed thermal switch, and the load module 2002. The control system 30 can accurately control the output voltage of the voltage regulator, actively adjust the state of the thermal switch, and adjust the load size of the load module 2002 in real time to ensure the controllability and repeatability of the fault simulation process. At the same time, it also receives and processes data from the measurement module 40, providing experimental control and data management functions. The measurement module 40 is used to collect electrical and mechanical state data of the distribution transformer 2001 during the fault simulation process. This module includes state detection data such as broadband voltage, current, leakage magnetic field, vibration and stress change, and transmits the data to the control system 30 in real time, providing comprehensive data support for fault simulation and analysis.

[0025] Through the synergy of the above five modules, the distribution transformer 2001 turn-to-turn short-circuit fault simulation platform can efficiently and accurately simulate the electrical and mechanical behavior of the distribution transformer 2001 when a turn-to-turn short-circuit fault occurs, including but not limited to the early unstable arc phenomenon of the fault and the transient heating, vibration, short-circuit current and force, leakage magnetic field, harmonic power loss and other working conditions during the short-circuit process. This simulation process is of great significance for in-depth understanding of the short-circuit fault mechanism, evaluation of the fault protection capability of the distribution transformer 2001 and optimization of the fault detection method, and can also provide researchers with valuable experimental data and analysis tools.

[0026] In an optional embodiment, the power module 10 further includes: a voltage regulating device for regulating the output voltage of the three-phase voltage regulator.

[0027] Optionally, the voltage regulating device can be a manual operating table. On the transformer inter-turn short-circuit fault simulation platform, the voltage regulating device is a key component of the power module 10, and its main function is to adjust the output voltage of the three-phase voltage regulator. The importance of this design lies in the ability to finely control the experimental parameters and simulate various voltage conditions that the distribution transformer 2001 may encounter in actual operation, including normal operating voltage, overvoltage, and voltage fluctuation. Specifically, the working mode of the voltage regulating device can include, but is not limited to, precise control, automatic adjustment, and safety assurance, wherein, for precise control, the voltage regulating device can adjust the output voltage of the three-phase voltage regulator with a very small voltage step value, which means that the experimenter can set and adjust a specific voltage level to study the impact of different voltage conditions on the performance and fault development of the distribution transformer 2001. For automatic adjustment, in addition to the manual adjustment capability, the voltage regulating device may also have an automatic adjustment function, which can automatically adjust the output voltage according to the experimental requirements or the control system 30 instructions, and provide support for the automated operation of the experiment. For safety assurance, when conducting high voltage experiments, the voltage regulating device can provide necessary safety measures, such as overvoltage protection, to ensure that no damage is caused to the distribution transformer 2001 or the experimenters during the experiment.

[0028] In this embodiment, the use of the voltage regulating device enables the simulation platform to conduct experiments under different voltage environments, which is essential for studying the inter-turn short-circuit fault characteristics of the distribution transformer 2001 under various operating conditions. By adjusting different voltage levels, the development trend of the fault and the change of state parameters of the distribution transformer 2001 under different working conditions can be observed and analyzed, such as the fluctuation of the short-circuit current, the distortion of the leakage magnetic field, the increase of harmonic power loss, and the change of physical states such as heating and vibration. Such an experimental design can provide rich data and experience support for establishing a more comprehensive and accurate fault detection and diagnosis method, thereby enhancing the operational safety and reliability of the distribution system.

[0029] In an optional embodiment, the load module 2002 includes a variable resistor and a variable inductor, and the variable resistor and the variable inductor are arranged in series on the secondary side of the distribution transformer 2001.

[0030] Optional, Figure 2 2001 is a schematic diagram of the structure of an optional distribution transformer 2001 turn-to-turn short-circuit fault simulation platform according to an embodiment of the present invention. Figure 2 As shown, the load module 2002 includes a variable resistor and a variable inductor. The combination of the variable resistor and the variable inductor can simulate loads of different properties, including resistive loads, inductive loads, and their combined loads. The resistive load mainly affects the thermal effect in the circuit, while the inductive load affects the phase of the current and the magnetic flux of the transformer. By changing the values ​​of the two, the influence of different load types on the inter-turn short-circuit fault of the distribution transformer 2001 can be studied. By accurately adjusting the values ​​of the variable resistor and the variable inductor, the experimenter can control the magnitude and phase of the current flowing through the distribution transformer 2001, simulate the change of the load in the actual power grid, and observe the change law of the state quantities such as the electrical characteristics, thermal effect, vibration and stress of the transformer under different load levels, which is very important for a deep understanding of the development process of the short-circuit fault. The design of the load module 2002 allows its parameters to be monitored and adjusted in real time during the experiment. This is achieved through the control system 30. The experimenter can change the parameters of the load module 2002, such as the resistance and inductance, as needed to observe the response of the transformer under different working conditions, which helps to optimize the fault detection and diagnosis strategy and improve maintenance efficiency. The load module 2002 is tightly integrated with the control system 30. The experimenter can easily adjust the resistance and inductance values ​​through the control system 30 interface. The control system 30 will feedback the adjusted status in real time to ensure the controllability of the experimental process and the accuracy of the data.

[0031] In this embodiment, by setting a load module 2002 including a variable resistor and a variable inductor in the inter-turn short-circuit fault simulation platform of the distribution transformer 2001, the inter-turn short-circuit fault characteristics of the transformer under different load conditions can be studied in a near-real environment. This not only helps to deeply understand the fault mechanism, but also provides valuable experimental data and theoretical support for fault prevention, equipment maintenance and optimization of operation strategies, thereby enhancing the safety of the power system.

[0032] In an optional embodiment, the measurement module 40 includes: a capacitor voltage divider, a current transformer, and a magnetic field probe, wherein the capacitor voltage divider is used to collect the broadband voltage signal on the primary side of the distribution transformer 2001 during the fault simulation process; the current transformer is used to collect the current signal on the secondary side or the fault coil of the distribution transformer 2001 during the fault simulation process, wherein the current signal includes the power frequency current and the harmonic current; the magnetic field probe is used to collect the leakage magnetic field data of the distribution transformer 2001 during the fault simulation process; the status detection data includes the broadband voltage signal, the current signal and the leakage magnetic field data.

[0033] Optional, still as Figure 2 As shown, the capacitor voltage divider is a precision voltage measurement device, which is set on the primary side of the distribution transformer 2001, that is, the high-voltage side, and is used to collect broadband voltage signals on the primary side of the transformer during the experiment. The capacitor voltage divider can accurately measure voltage changes from power frequency to high frequency, which is crucial for analyzing voltage distortion, harmonic generation and other phenomena caused by short-circuit faults. The acquisition of broadband voltage signals helps to understand the response characteristics of the transformer to short-circuit faults at different frequencies, including voltage fluctuations and the increase in harmonic content. The current transformer (CT) is set on the secondary side or fault coil of the distribution transformer 2001 to collect current signals, including power frequency current and harmonic current. The current transformer can convert large current into smaller, easy-to-measure current signals, and is suitable for monitoring and recording short-circuit current characteristics. By analyzing the current signal, researchers can understand the size, waveform and harmonic components of the short-circuit current, which is of great significance for evaluating the impact of short-circuit faults on transformer performance and identifying early signs of short-circuit faults. The magnetic field probe is used to monitor the leakage magnetic field data of the distribution transformer 2001 during the fault simulation process. Leakage magnetic field refers to the fact that when there is a short circuit fault between turns of the winding, part of the magnetic flux will not completely pass through the iron core of the transformer, but will form a closed magnetic circuit around the winding. This magnetic field change is one of the important bases for detecting short circuits between turns. The magnetic field probe can capture the intensity and distribution of the leakage magnetic field, providing intuitive physical quantity information for studying the insulation state of the winding, the degree of short circuit and the integrity of the transformer magnetic circuit. The broadband voltage signal, current signal (including power frequency and harmonic current) and leakage magnetic field data collected by the measurement module 40 together constitute the state detection data. These data can fully reflect the changes in the electrical and mechanical states of the distribution transformer 2001 during the simulation of the short circuit fault between turns, and are the key information sources for analyzing the fault mechanism, evaluating the health of the equipment and optimizing the fault detection technology.

[0034] In this embodiment, through the coordinated work of the capacitor voltage divider, the current transformer and the magnetic field probe, the measurement module 40 can provide a set of comprehensive state detection data, covering multiple dimensions such as voltage, current and magnetic field. The comprehensive analysis of these data not only helps to deeply understand the characteristic parameter changes of the distribution transformer 2001 in the early stage of the inter-turn short-circuit fault, but also provides the necessary experimental basis for establishing a more accurate fault diagnosis and early warning system, thereby improving the operational safety and reliability of the power system. This design of the experimental platform can ensure the scientific nature of the fault simulation process and the reliability of the data, and provide strong technical support for the research in the field of power equipment status monitoring and maintenance.

[0035] In an optional embodiment, the measurement module 40 also includes: a vibration soundprint sensor and an optical fiber stress sensor, wherein the vibration soundprint sensor is used to collect vibration and acoustic signals of the distribution transformer 2001 during the fault simulation process; the optical fiber stress sensor is used to collect stress change information of the distribution transformer 2001 during the fault simulation process; the state detection data also includes vibration and acoustic signals, stress change information.

[0036] Optionally, a vibration soundprint sensor is used to capture the vibration and acoustic signals of the distribution transformer 2001 during the fault simulation process. When the transformer is in operation, the electromagnetic force, mechanical stress, arc discharge and other phenomena inside it will cause vibration and produce specific acoustic characteristics. The vibration soundprint sensor can detect and record these changes, including frequency, amplitude and acoustic mode. The information of these vibration and acoustic signals is of great significance for identifying mechanical or electrical anomalies inside the transformer, such as loose windings, poor contact or arc discharge phenomena. By analyzing the characteristics of vibration and acoustic signals, researchers can evaluate the structural health and electrical performance of the transformer, providing additional physical quantity basis for fault diagnosis and prediction. The optical fiber stress sensor is used to monitor the stress change information of the distribution transformer 2001 during the fault simulation process. In the distribution transformer 2001, especially in the winding area, the short-circuit current can generate strong electromotive force, resulting in stress changes, which may cause problems such as winding deformation and insulation damage. The optical fiber stress sensor uses the physical properties of optical fiber, such as strain sensitivity and light transmission performance, to measure the change of mechanical stress. They are usually installed directly on the transformer windings or other key components, and can monitor in real time the tiny stress changes caused by current fluctuations and electromotive forces. These data are crucial for evaluating the impact of turn-to-turn short circuits on the structural integrity and insulation performance of the transformer, and are helpful for studying the physical mechanisms in the development of short-circuit faults. With the addition of vibration soundprint sensors and optical fiber stress sensors, the state detection data collected by the measurement module 40 is no longer limited to electrical parameters, but further covers vibration and acoustic signals, as well as stress change information. The comprehensive analysis of this data set can provide a more comprehensive insight into the transformer in the early stages of turn-to-turn short circuit faults, including its mechanical properties, structural state, and electrical characteristics. The monitoring of these non-electrical state parameters can fill the blind spots of traditional fault detection methods and help to establish a more comprehensive and sensitive fault diagnosis system.

[0037] In the distribution transformer 2001 inter-turn short-circuit fault simulation platform of this embodiment, the addition of vibration soundprint sensors and optical fiber stress sensors can significantly enhance the monitoring ability of the distribution transformer 2001 inter-turn short-circuit fault simulation platform for transformer non-electrical state changes. They can not only capture changes in electrical parameters, but also monitor and record physical state changes caused by short-circuit faults, such as vibration, acoustic patterns, and mechanical stress. These multi-dimensional data collection and analysis have irreplaceable value for in-depth understanding of the entire process of short-circuit faults, evaluating their impact on transformer performance, and optimizing fault detection and prevention strategies, thereby providing strong technical support for improving the safety and economy of distribution systems.

[0038] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation method of the distribution transformer 2001 turn-to-turn short-circuit fault simulation platform, as shown in FIG. Figure 2As shown, the distribution transformer 2001 inter-turn short-circuit fault simulation platform is mainly composed of four parts: power module 10, fault module 20, measurement module 40 and control system 30. The power module 10 adopts a three-phase voltage regulator; the fault module 20 is composed of a transformer body, a fault coil, a normally closed thermal switch and an adjustable load; the measurement module 40 includes a capacitor voltage divider, a high-frequency current transformer CT and a magnetic field probe, etc., which are used to collect various measurement values; the control system 30 covers the precise control of the voltage regulator, the active adjustment of the thermal switch and the real-time adjustment of the load size, and performs the collection and display functions of the measurement data. Through the coordinated work of various functional modules, the distribution transformer 2001 inter-turn short-circuit fault simulation platform realizes the simulation of the early unstable arc phenomenon of the inter-turn short-circuit fault, as well as the simulation of the transient short-circuit current, force, leakage magnetic field, harmonic power loss and heating of the short-circuit turns of the winding.

[0039] Since the normally closed thermal switch has a turn-to-turn short circuit in the on state, this causes a significant increase in the conductor temperature. Under this high temperature condition, the thermal switch will automatically disconnect, effectively eliminating the short circuit phenomenon and allowing the conductor to cool down naturally. Through the periodic on and off process of this normally closed thermal switch, the temporary short circuit phenomenon unique to the early stage of the turn-to-turn short circuit fault can be simulated. This simulation is of great significance for studying and understanding the development process of short circuit faults, because it helps to better identify and prevent potential distribution transformer 2001 turn-to-turn short circuit faults and ensure the safe and stable operation of the distribution system.

[0040] Installing capacitor voltage dividers and high-frequency CTs on the outgoing lines of the simulated fault platform can detect electrical parameters such as broadband voltage, current, and harmonic power loss. At the same time, through magnetic field probes, vibration soundprint sensors, and optical fiber stress sensors, state quantities such as leakage magnetic flux, vibration, and stress changes during the development of the fault can be monitored. Using the adjustable load module 2002, accurate control of the load can be achieved, and then the key parameters such as instantaneous heating, vibration, short-circuit current, force, leakage magnetic flux, and harmonic power loss of the short-circuit coil at different load levels in the event of a temporary short circuit of the distribution transformer 2001 can be observed. In view of the blind spots in the live detection of the distribution transformer 2001, turn-to-turn short-circuit detection is performed by adjusting the load, aiming to significantly improve the comprehensiveness and accuracy of the detection.

[0041] Through this embodiment, the detection efficiency of the inter-turn short-circuit fault of the distribution transformer 2001 winding can be improved, ensuring that the equipment can perform efficient detection and rapid and accurate fault diagnosis. The occurrence of the inter-turn short-circuit fault of the distribution transformer 2001 can be effectively curbed, thereby ensuring the stable operation of the distribution transformer equipment. This will greatly reduce the probability of power outages caused by the inter-turn short-circuit fault of the distribution transformer 2001, and significantly reduce the equipment loss caused by this fault and the power loss caused by line power outage. At the same time, it can also enhance the safety and economy of the distribution network, ensuring the stable operation of the power system and the reliability of power supply.

[0042] This embodiment can be applied to 10 kV and 35 kV distribution network systems. Through this embodiment, the blind spots of existing live detection of distribution transformers can be effectively eliminated, the comprehensiveness and accuracy of detection can be significantly improved, and the incidence of inter-turn short-circuit faults caused by insulation defects of the distribution transformer 2001 winding can be reduced, thereby ensuring the safe and stable operation of the distribution network. This embodiment also has significant reference value for power transformers of 110 kV and above voltage levels.

[0043] It should be noted that, in the present embodiment, a normally closed thermal switch is added to the distribution transformer 2001 to simulate the situation of inter-turn short circuit. In addition, an adjustable load module 2002 is introduced on the load side to more truly reflect the development process of inter-turn short circuit of the distribution transformer 2001 under actual operating conditions. Through the above methods, the state quantity characteristics such as the distortion of the leakage magnetic field, the change of the electromotive force, the generation of vibration, the fluctuation of the broadband voltage and current, and the harmonic loss can be studied in detail during the development process of the inter-turn short circuit fault of the distribution transformer 2001. These studies are helpful to deeply analyze the influence of the load and short circuit state on the state parameters and their regularity, thereby providing a solid experimental and data basis for establishing the method of evaluating the inter-turn short circuit fault state of the distribution transformer 2001 and the conditions for fault diagnosis and early warning. By detecting the distribution transformer 2001 in actual operation and comparing it with the theoretical results, it can be judged whether the distribution transformer 2001 is in the development process of inter-turn short circuit, thereby providing a scientific basis for timely discovering and handling potential faults.

[0044] Specifically, the core structure of the distribution transformer 2001 turn-to-turn short-circuit fault simulation platform constructed in this embodiment mainly includes the following key parts: first, a three-phase AC signal source, which is responsible for generating the required AC power; second, a distribution transformer 2001, which is equipped with a normally closed thermal switch and an observation window for real-time monitoring and operation; then a variable load module 2002, which can be adjusted according to different test requirements to simulate various load conditions in actual work; in addition, there is a measurement module 40 for accurately measuring and recording various parameters in the operation of the device; finally, the entire distribution transformer 2001 turn-to-turn short-circuit fault simulation platform is managed by a control system 30 to ensure that each component works in coordination to achieve efficient and stable operation. The basic architecture of the device is composed of the above-mentioned core components, and the integration of these components enables the device to perform accurate testing and analysis under diverse working conditions. Through the synergistic effect of these components, various fault situations that the distribution transformer 2001 may encounter during actual operation, especially turn-to-turn short-circuit faults, can be efficiently simulated. The mutual cooperation of these components constructs a realistic operating environment, making the fault simulation closer to the actual operating state. Based on this, operation and maintenance personnel can more accurately diagnose the cause of the fault and identify potential risk factors. Furthermore, these analysis results provide a solid technical foundation for fault prevention and response strategies, helping relevant technicians to develop more effective maintenance and repair plans, thereby improving the operating stability and safety of distribution transformer 2001.

[0045] In the implementation of the present invention, the three-phase AC signal source is responsible for the output voltage and applies the voltage to the distribution transformer 2001. The three-phase voltage regulator is equipped with a manual control console to achieve fine adjustment of the output voltage, and can also automatically provide a boost function for the distribution transformer 2001, thereby simulating different working conditions. In order to simulate the actual working conditions more accurately, the fault module 20 is particularly integrated with a normally closed thermal switch and an adjustable load, and both can realize the disconnection of the switch and the adjustment of the load through the console. By adopting this specific configuration method, the fault evolution process caused by the turn-to-turn short circuit phenomenon in the actual operation of the distribution transformer 2001 can be effectively simulated and reproduced. This configuration can not only show the gradual development of the fault in detail, but also help to deeply understand the physical mechanism and influencing factors behind it. Under different load conditions, the short-circuit characteristics and data information collected are of various types, covering multiple aspects such as turn-to-turn short-circuit current, thermal effect of the distribution transformer 2001, and vibration. These data are of great value for monitoring the development of the inter-turn short circuit of the distribution transformer 2001, because they provide strong support for the experimental data. Through in-depth analysis and research of these data, the evolution law of the short circuit phenomenon can be more accurately grasped, and then a theoretical basis can be provided for the prevention and treatment of such faults. This not only helps to improve the stability and reliability of the power system, but also provides a key reference for the maintenance and management of power equipment. The opening and closing process of the normally closed thermal switch will continue without human intervention until the thermal switch fails naturally due to overheating, thus completing a complete simulation cycle and obtaining a complete set of experimental data.

[0046] During the simulation experiment, the measurement module 40 also plays a vital role. This module is responsible for real-time monitoring and recording of key electrical parameters, including broadband voltage, current, and harmonic power loss. At the same time, this module is also responsible for detecting state variables such as leakage flux, vibration, and stress changes during the fault evolution process. Subsequently, these data will be transmitted back to the control system 30 for collection. The control system 30 plays a key role in accurately controlling the voltage regulator, actively adjusting the thermal switch, and adjusting the load size in real time. In addition, the system is also responsible for collecting and displaying measurement data, allowing users to adjust device parameters at any time to simulate the development process of inter-turn short circuit of distribution transformer 2001 under different working conditions, and integrate relevant valid data. Through in-depth analysis of these data, researchers can more thoroughly grasp the internal dynamic changes of distribution transformer 2001 when inter-turn short circuit fault occurs, providing a scientific basis for the formulation of fault diagnosis and prevention strategies.

[0047] It should be noted that in this application Figure 1 to Figure 2 The specific structure of the distribution transformer 2001 turn-to-turn short-circuit fault simulation platform shown in the figure is only for reference. In specific applications, the distribution transformer 2001 turn-to-turn short-circuit fault simulation platform in this application can be compared to Figure 1 to Figure 2 The distribution transformer 2001 inter-turn short-circuit fault simulation platform shown has more or less structure.

[0048] An embodiment of the present invention also provides a method embodiment for simulating an inter-turn short-circuit fault of a distribution transformer. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0049] Figure 3 is a flow chart of a method for simulating a turn-to-turn short-circuit fault of a distribution transformer according to an embodiment of the present invention. The method can be applied to any of the above-mentioned distribution transformer turn-to-turn short-circuit fault simulation platforms, such as Figure 3 As shown, the method comprises the following steps:

[0050] Step S102, controlling the output voltage of the three-phase voltage regulator in the power module to a preset voltage value, simulating different voltage operating environments of the distribution transformer;

[0051] Optionally, the execution body of steps S102 to S110 can be a control system in a distribution transformer inter-turn short-circuit fault simulation platform, and the control system sends a corresponding control signal to each module to control each module to adjust to a corresponding state. By controlling the output voltage of the three-phase voltage regulator in the power module to a preset voltage value through the control system, various voltage operating environments that the distribution transformer may encounter in an actual power grid can be simulated, including normal voltage, overvoltage, and voltage fluctuation. The control system can finely adjust the output voltage of the voltage regulator to study the development trend of inter-turn short-circuit faults and their impact on transformer performance under different voltage levels. The selection of the preset voltage value can be based on the needs of the experimental design and the understanding of the operating characteristics of the distribution transformer.

[0052] Step S104, controlling the built-in fault coil and / or normally closed thermal switch of the distribution transformer in the fault module to operate, simulating the turn-to-turn short circuit process of the distribution transformer;

[0053] Optionally, the turn-to-turn short-circuit process of the distribution transformer can be simulated by controlling the fault coil or thermal switch. The design of the fault coil is similar to that of the transformer winding, which can trigger the local short-circuit phenomenon, while the normally closed thermal switch automatically opens when the short-circuit current causes the temperature to rise. This process is similar to the fault protection mechanism in the actual transformer. The activation of the fault coil or thermal switch is precisely controlled by the control system, ensuring the controllability and repeatability of the simulation process, so as to collect accurate fault data.

[0054] Step S106, controlling the adjustable load in the load module to be adjusted to a preset load, simulating the load state of the distribution transformer under different load conditions;

[0055] Optionally, the load module can be set to simulate different load levels that the distribution transformer in the actual power system is subjected to, including resistive load, inductive load and their combination. By adjusting the load module through the control system, it is possible to observe the impact of different loads on the transformer performance and fault characteristics under specific voltage and turn-to-turn short circuit conditions. The selection of preset loads is based on the needs of the experimental design and the understanding of the load characteristics of the distribution transformer.

[0056] Step S108, performing fault simulation on the distribution transformer based on the voltage operating environment, the turn-to-turn short circuit process and the load state;

[0057] Optionally, based on the voltage operating environment, turn-to-turn short-circuit process and load state, the distribution transformer is subjected to fault simulation, and the control operations of the above steps S102 to S106 are integrated to study the response of the distribution transformer under the turn-to-turn short-circuit fault by simulating specific voltage, short-circuit and load conditions. Fault simulation is not limited to the change of electrical parameters, but also includes non-electrical state parameters such as thermal effect, vibration characteristics, stress distribution, etc. of the transformer, which helps to comprehensively evaluate the potential impact of the fault on the performance and structural integrity of the transformer.

[0058] Step S110: collecting state detection data of the distribution transformer during the fault simulation process through a measurement module, and sending the state detection data to a control system.

[0059] Optionally, the measurement module is responsible for real-time monitoring and recording of various state parameters of the transformer during the simulated fault process, such as broadband voltage, current, leakage magnetic field data, vibration soundprint signal, stress change information, etc. These data are collected by the measurement equipment included in the measurement module (such as capacitor divider, current transformer, magnetic field probe, vibration soundprint sensor and optical fiber stress sensor), and then integrated and analyzed by the control system. The real-time collection and feedback of state detection data can not only provide instant monitoring means for experimental operations, but also provide detailed records for subsequent data analysis and fault mechanism research, which helps to improve the accuracy of fault detection and the effectiveness of fault prevention.

[0060] In an optional embodiment, the operation of a fault coil and / or a normally closed thermal switch built into a distribution transformer in a fault module is controlled to simulate a turn-to-turn short-circuit process of the distribution transformer, including: controlling and adjusting the position and number of turns of a fault coil built into the distribution transformer in the fault module, and / or disconnecting a normally closed thermal switch built into the distribution transformer to simulate a turn-to-turn short-circuit process of the distribution transformer, wherein the normally closed thermal switch is disconnected when the temperature reaches a preset temperature threshold.

[0061] Optionally, the fault coil is a key component for triggering an inter-turn short circuit in the distribution transformer inter-turn short circuit fault simulation platform. By changing the position of the fault coil in the transformer winding and its number of turns, the scope and degree of the short circuit can be finely controlled, thereby simulating inter-turn short circuit faults of different severity. This operation is performed by the control system, which can achieve the accuracy and flexibility of the fault simulation and ensure the similarity of the experimental results with the actual fault conditions. The thermal switch is a temperature-sensitive protection device that automatically disconnects and interrupts the flow of the short-circuit current when the temperature detected exceeds the preset temperature threshold. In the distribution transformer inter-turn short circuit fault simulation platform of this embodiment, the thermal switch is designed to be normally closed, which means that under normal working conditions, it is closed and the current can pass normally. However, when the short-circuit current triggered by the fault coil causes the local temperature to rise to the preset threshold, the thermal switch will disconnect, simulating the start of the overheating protection mechanism in the actual distribution transformer. This design can not only protect the experimental equipment from overheating damage, but also more realistically simulate how the internal protection system of the distribution transformer responds when an inter-turn short circuit occurs, and the influence of temperature on the short-circuit process. The preset temperature threshold is determined based on the insulation material, design specifications, and operating experience of the distribution transformer. It represents the temperature limit at which the thermal switch disconnects to protect the equipment from further damage during a short circuit. The selection of this temperature threshold is critical to ensure that the experiment can simulate the thermal effects under actual fault conditions while avoiding irreversible damage that may occur during the experiment.

[0062] Through this embodiment, not only can inter-turn short-circuit faults of different locations and severity be simulated, but also the influence of temperature on the short-circuit process and how the internal protection system of the distribution transformer responds to overheating conditions can be studied. The above method not only provides more complex experimental conditions for the study of fault mechanisms, but also provides valuable data and experience for fault prevention, protection system design, and operation and maintenance of distribution transformers, which helps to improve the safety and economy of the power system. This design of the distribution transformer inter-turn short-circuit fault simulation platform can ensure the controllability and safety of the fault simulation process and the reliability of the experimental results, and provide strong support for the optimization of power equipment status monitoring and fault diagnosis technology.

[0063] In an optional embodiment, after collecting the state detection data of the distribution transformer during the fault simulation process through the measurement module and sending the state detection data to the control system, the method also includes: determining the fault type corresponding to the state detection data; and storing the state detection data and the fault type correspondingly to the control system.

[0064] Optionally, the state detection data collected by the measurement module may include, but is not limited to, parameters such as broadband voltage, current, leakage magnetic field, vibration, acoustic signal and stress change. These data are further analyzed in the control system to identify and determine the type of fault being simulated. For example, by analyzing the spectrum of the current signal, it is possible to identify whether there is a harmonic current, and the appearance of a harmonic current is often associated with a turn-to-turn short circuit fault. In addition, the non-electrical state information provided by the vibration soundprint sensor and the optical fiber stress sensor, such as vibration mode and stress distribution, can also help to identify the nature and location of the fault. By analyzing these data, it can be determined whether the fault is a turn-to-turn short circuit and its severity can be assessed. After determining the fault type corresponding to the state detection data, these data are stored in the control system together with the fault type. When storing data, it is associated with the fault type, which helps to establish a database with reference value and provide historical data support for subsequent fault detection, diagnosis and prevention. Such a database storage method not only facilitates the organization and management of data, but also improves the accuracy and efficiency of fault analysis, especially when processing a large amount of experimental data, it can quickly locate parameter changes related to a specific fault type. By storing the state detection data in association with the fault type, it is possible to more systematically understand and analyze the performance characteristics of different types of faults in state parameters. For example, for turn-to-turn short-circuit faults, the data may show specific broadband voltage distortion, increased current harmonics, changes in vibration modes, and abnormal stress distribution. The study of these characteristics helps to deepen the understanding of the fault mechanism and provide a basis for establishing a fault diagnosis model based on parameter changes. By accumulating and analyzing a large amount of experimental data, a fault mode library can be constructed to provide theoretical guidance and practical basis for on-site live detection. When a state parameter change matching a specific fault type stored in the database is detected on site, the operation and maintenance personnel can quickly identify the fault type and take corresponding treatment measures to effectively prevent further deterioration of the fault and ensure the stable operation of the power system.

[0065] In this embodiment, by systematically analyzing and storing the state detection data and the corresponding fault types in the fault simulation process, it not only helps to deepen the understanding of the fault mechanism of the distribution transformer inter-turn short circuit, but also can provide strong data support and decision-making basis for fault prevention, diagnosis and maintenance, thereby effectively improving the operational safety and economy of the power system. The above method marks the transition of the fault simulation experiment from data collection to data analysis and application, which is a key link in the improvement of the experimental platform function and practicality.

[0066] In an optional embodiment, when the state detection data includes multiple groups, after the state detection data and the fault type are stored in the control system, the method also includes: obtaining target state detection data collected during the operation of the distribution transformer; determining reference state detection data that matches the target state detection data from the multiple groups of state detection data; and determining the fault type corresponding to the reference state detection data as the fault type corresponding to the target state detection data.

[0067] Optionally, in actual applications, the state detection data of the distribution transformer is collected in real time by various sensors installed thereon (such as capacitor voltage dividers, current transformers, magnetic field probes, vibration soundprint sensors, and optical fiber stress sensors). These data reflect the electrical and physical states of the transformer under actual operating conditions, including information such as voltage, current, magnetic field, vibration, and stress changes. Acquiring these target state detection data is the basis for on-site fault diagnosis and provides a direct observation basis for subsequent fault type identification. The control system stores multiple sets of state detection data collected when simulating different fault types through the experimental platform. After obtaining the target state detection data in actual operation, the control system will compare and analyze it with the stored reference data. This matching process usually involves comparing the characteristic parameters of the data set, such as the degree of voltage distortion, current harmonic content, vibration mode, stress distribution map, etc. By comparison, the reference data set that is closest to the target data in terms of characteristics can be found as a reference basis for the fault type. Once the reference state detection data with the highest matching degree with the target state detection data is found, the control system determines the fault type corresponding to the reference data as the fault type represented by the target data. This process relies on the fault mode information stored in the database, that is, the typical performance of different fault types in state parameters. For example, if the target data exhibits electrical and physical state characteristics similar to the inter-turn short-circuit fault stored in the database, the control system will determine that the target data represents an inter-turn short-circuit fault. By matching and analyzing the target state detection data with the reference data in the experimental platform database, operation and maintenance personnel can achieve real-time fault diagnosis. Once the fault type is determined, appropriate measures can be taken immediately, such as adjusting the load, performing maintenance, or taking emergency power outages, to prevent further development of the fault and ensure the safe operation of the power system.

[0068] In this embodiment, by using multiple groups of state detection data collected in the experimental platform as a reference, the state of the distribution transformer in actual operation is analyzed in real time and the fault type is determined, providing more scientific and accurate decision support for the operation and maintenance of power equipment. The above method can not only improve the accuracy and efficiency of fault diagnosis, but also effectively prevent the further expansion of faults and ensure the stable operation of the power system. It is a key step in transforming fault simulation experiments into practical applications.

[0069] In the above steps S102 to S108, by accurately controlling and simulating the power supply, fault and load modules, the turn-to-turn short-circuit fault characteristics of the distribution transformer under different working conditions can be comprehensively studied. The above method combines the monitoring of electrical parameters and non-electrical state parameters, providing strong data support and experimental means for in-depth understanding of fault mechanisms, evaluation of equipment health status, and optimization of fault detection and prevention strategies, thereby helping to improve the operational safety of the power system.

[0070] In this embodiment, a distribution transformer inter-turn short-circuit fault simulation device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the terms "module" and "device" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0071] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above-mentioned distribution transformer turn-to-turn short-circuit fault simulation method. Figure 4 is a schematic diagram of the structure of a distribution transformer turn-to-turn short-circuit fault simulation device according to an embodiment of the present invention. Figure 4 As shown, the above-mentioned distribution transformer inter-turn short-circuit fault simulation device includes: a first control module 200, a second control module 202, a third control module 204, a simulation module 206, and a data acquisition module 208, wherein:

[0072] The first control module 200 is used to control the output voltage of the three-phase voltage regulator in the power module to a preset voltage value, simulating different voltage operating environments of the distribution transformer;

[0073] The second control module 202 is used to control the built-in fault coil and / or normally closed thermal switch of the distribution transformer in the fault module to simulate the inter-turn short circuit process of the distribution transformer;

[0074] The third control module 204 is used to control the adjustable load in the load module to be adjusted to a preset load, simulating the load state of the distribution transformer under different load conditions;

[0075] A simulation module 206, for performing fault simulation on the distribution transformer based on the voltage operating environment, the turn-to-turn short circuit process and the load state;

[0076] The data acquisition module 208 is used to collect the state detection data of the distribution transformer during the fault simulation process through the measurement module, and send the state detection data to the control system.

[0077] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0078] It should be noted that the first control module 200, the second control module 202, the third control module 204, the simulation module 206, and the data acquisition module 208 correspond to steps S102 to S110 in the embodiment, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the modules as part of the device can be run in a computer terminal.

[0079] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

[0080] The above-mentioned distribution transformer inter-turn short-circuit fault simulation device may also include a processor and a memory. The above-mentioned first control module 200, second control module 202, third control module 204, simulation module 206, data acquisition module 208, etc. are all stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to realize corresponding functions.

[0081] The processor includes a kernel, which retrieves the corresponding program module from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0082] According to an embodiment of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any of the above-mentioned distribution transformer inter-turn short-circuit fault simulation methods.

[0083] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

[0084] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: control the output voltage of the three-phase voltage regulator in the power module to a preset voltage value to simulate different voltage operating environments of the distribution transformer; control the built-in fault coil and / or normally closed thermal switch of the distribution transformer in the fault module to simulate the inter-turn short-circuit process of the distribution transformer; control the adjustable load in the load module to adjust to a preset load to simulate the load state of the distribution transformer under different load conditions; perform fault simulation on the distribution transformer based on the voltage operating environment, the inter-turn short-circuit process and the load state; collect the state detection data of the distribution transformer during the fault simulation process through the measurement module, and send the state detection data to the control system.

[0085] According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any of the above-mentioned distribution transformer turn-to-turn short-circuit fault simulation methods is executed.

[0086] According to an embodiment of the present application, an embodiment of a computer program product is also provided. When executed on a data processing device, it is suitable for executing a program that initializes any of the steps of the above-mentioned distribution transformer inter-turn short-circuit fault simulation method.

[0087] Optionally, the above-mentioned computer program product, when executed on a data processing device, is suitable for executing an initialization program having the following method steps: controlling the output voltage of the three-phase voltage regulator in the power module to a preset voltage value to simulate different voltage operating environments of the distribution transformer; controlling the action of the fault coil and / or normally closed thermal switch built into the distribution transformer in the fault module to simulate the turn-to-turn short-circuit process of the distribution transformer; controlling the adjustable load in the load module to adjust to a preset load to simulate the load state of the distribution transformer under different load conditions; performing fault simulation on the distribution transformer based on the voltage operating environment, the turn-to-turn short-circuit process and the load state; collecting the state detection data of the distribution transformer during the fault simulation process through the measurement module, and sending the state detection data to the control system.

[0088] An embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: controlling the output voltage of a three-phase voltage regulator in a power module to a preset voltage value to simulate different voltage operating environments of a distribution transformer; controlling the action of a fault coil and / or a normally closed thermal switch built into the distribution transformer in a fault module to simulate a turn-to-turn short-circuit process of the distribution transformer; controlling an adjustable load in a load module to be adjusted to a preset load to simulate the load state of the distribution transformer under different load conditions; performing fault simulation on the distribution transformer based on the voltage operating environment, the turn-to-turn short-circuit process, and the load state; and collecting state detection data of the distribution transformer during the fault simulation process through a measurement module, and sending the state detection data to a control system.

[0089] The above sequence of the embodiments of the present invention is for description only and does not represent the superiority or inferiority of the embodiments.

[0090] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0092] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0093] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0094] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a non-volatile storage medium, including several instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0095] The above are only preferred embodiments 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 should also be regarded as the scope of protection of the present invention.

Claims

1. A distribution transformer turn-to-turn short-circuit fault simulation platform, characterized in that: include: A power module, the power module comprising a three-phase voltage regulator, for outputting an adjustable voltage to simulate different voltage operating environments of the distribution transformer; A fault module, the fault module includes the distribution transformer and a load module, wherein the distribution transformer is equipped with a fault coil and a normally closed thermal switch, the normally closed thermal switch is used to automatically disconnect in the event of a short circuit to simulate the turn-to-turn short circuit process of the distribution transformer; the load module is an adjustable load, used to simulate the load state of the distribution transformer under different load conditions; A control system, used to control the power module, the normally closed thermal switch and the load module, and to perform fault simulation on the distribution transformer; The measuring module is used to collect the state detection data of the distribution transformer during the fault simulation process and send the state detection data to the control system.

2. The distribution transformer turn-to-turn short-circuit fault simulation platform according to claim 1 is characterized in that: The power supply module further comprises: a voltage regulating device for regulating the output voltage of the three-phase voltage regulator.

3. The distribution transformer turn-to-turn short-circuit fault simulation platform according to claim 1 is characterized in that: The load module includes a variable resistor and a variable inductor, and the variable resistor and the variable inductor are arranged in series on the secondary side of the distribution transformer.

4. The distribution transformer turn-to-turn short-circuit fault simulation platform according to claim 1 is characterized in that: The measuring module includes: a capacitive voltage divider, a current transformer, and a magnetic field probe, wherein: The capacitive voltage divider is used to collect the broadband voltage signal on the primary side of the distribution transformer during the fault simulation process; The current transformer is used to collect the current signal in the secondary side or the fault coil of the distribution transformer during the fault simulation process, wherein the current signal includes the power frequency current and the harmonic current; The magnetic field probe is used to collect leakage magnetic field data of the distribution transformer during the fault simulation process; The state detection data includes the broadband voltage signal, the current signal and the leakage magnetic field data.

5. The distribution transformer turn-to-turn short-circuit fault simulation platform according to claim 4 is characterized in that: The measurement module also includes: a vibration soundprint sensor and an optical fiber stress sensor, wherein: The vibration soundprint sensor is used to collect vibration and acoustic signals of the distribution transformer during the fault simulation process; The optical fiber stress sensor is used to collect stress change information of the distribution transformer during the fault simulation process; The state detection data also includes the vibration and acoustic signals, and the stress change information.

6. A method for simulating inter-turn short-circuit fault of a distribution transformer, characterized in that: The method applied to the distribution transformer turn-to-turn short-circuit fault simulation platform according to any one of claims 1 to 5 comprises: Controlling the output voltage of the three-phase voltage regulator in the power module to a preset voltage value to simulate different voltage operating environments of the distribution transformer; Controlling the built-in fault coil and / or normally closed thermal switch of the distribution transformer in the fault module to simulate the inter-turn short circuit process of the distribution transformer; Controlling the adjustable load in the load module to be adjusted to a preset load, simulating the load state of the distribution transformer under different load conditions; Based on the voltage operating environment, the turn-to-turn short-circuit process and the load state, performing a fault simulation on the distribution transformer; The measurement module collects state detection data of the distribution transformer during the fault simulation process, and sends the state detection data to the control system.

7. The method according to claim 6, characterized in that The control module controls the built-in fault coil and / or normally closed thermal switch of the distribution transformer to operate, simulating the turn-to-turn short circuit process of the distribution transformer, including: Control and adjust the position and number of turns of the fault coil built into the distribution transformer in the fault module, and / or disconnect the normally closed thermal switch built into the distribution transformer, to simulate the inter-turn short circuit process of the distribution transformer, wherein the normally closed thermal switch is disconnected when the temperature reaches a preset temperature threshold.

8. The method according to claim 6, characterized in that After collecting the state detection data of the distribution transformer during the fault simulation process by the measurement module and sending the state detection data to the control system, the method further includes: Determine the fault type corresponding to the status detection data; The state detection data and the fault type are correspondingly stored in the control system.

9. The method according to claim 8, characterized in that In the case where the state detection data includes multiple groups, after the state detection data and the fault type are correspondingly stored in the control system, the method further includes: Acquire target state detection data collected during the operation of the distribution transformer; Determining, from a plurality of sets of state detection data, reference state detection data that matches the target state detection data; The fault type corresponding to the reference state detection data is determined as the fault type corresponding to the target state detection data.

10. An electronic device, characterized in that: It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the distribution transformer inter-turn short-circuit fault simulation method as described in any one of claims 6 to 9.

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