Voltage control method and device for transformer substation transformer, terminal equipment and storage medium

Abstract

The invention discloses a voltage control method and device for a transformer substation transformer, terminal equipment and a storage medium, and the method comprises the steps: firstly determining a target transformer with load fluctuation in a transformer substation, and then carrying out the real-time load control of a control transformer with the same target real-time output voltage based on the target real-time output voltage of the target transformer; the standard load of the current target real-time output voltage is determined, then the load deviation proportion of the real-time load and the standard load of the target transformer is calculated, and finally when it is determined that the load deviation proportion is larger than a preset deviation threshold value, the output voltage of the target transformer is adjusted. Therefore, based on the fact that the operation of the power system has certain redundancy and stability and can cope with a certain degree of load fluctuation, the output voltage of the transformer is adjusted only when the load deviation proportion of the real-time load of the target transformer exceeds the threshold value, stable power supply of the power grid can be ensured, and meanwhile the output voltage of the transformer is adjusted. The frequency of voltage regulation of the transformer is effectively reduced, and the service life of the transformer is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a voltage control method, device, terminal equipment, and storage medium for a transformer in a substation. Background Art

[0002] Substations use high voltage to transmit electric energy to reduce transmission losses. They are the connection points of transmission lines, transmission lines and distribution lines, and are also important places for power distribution and conversion. They can perform voltage conversion, receive and distribute electric energy, control the flow of electric current and adjust the voltage of electric energy. Substations usually have high-voltage switchgear, transformers, low-voltage switchgear and auxiliary equipment. Substations can connect power grids of various voltage levels through their transformers, and transformers can also reduce high-voltage electric energy to low voltage that is more suitable for user needs. Therefore, substations often adjust the output voltage of the transformer to enable the transformer to convert a voltage that can adapt to different electricity needs.

[0003] In the relevant traditional technical solutions, in order to ensure that the output voltage of the transformer in the substation connected to the power grid corresponds to the load demand, the load is usually monitored and the output voltage of the transformer is adjusted in real time according to the load changes. However, during the operation of the transformer, each voltage adjustment will cause a certain amount of heat to be generated in the winding and the core. If the voltage is adjusted frequently only according to load fluctuations, the service life of the transformer will be greatly shortened. Summary of the invention

[0004] The embodiments of the present invention provide a voltage control method, device, terminal equipment, and storage medium for a substation transformer. By considering the real-time load and load deviation ratio of the target transformer to evaluate whether the target transformer needs voltage regulation, the number of transformer voltage regulation can be effectively reduced while ensuring stable power supply to the power grid, thereby extending the service life of the transformer.

[0005] An embodiment of the present invention provides a voltage control method for a transformer in a substation, comprising:

[0006] Obtain the real-time output voltage, real-time load, and historical normal load of all transformers in the substation;

[0007] According to the real-time load, determining a target transformer with load fluctuation;

[0008] According to the target real-time output voltage of the target transformer, determining a plurality of comparison transformers having the same target real-time output voltage;

[0009] Calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each reference transformer and the historical normal load;

[0010] Calculating a load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer;

[0011] When it is determined that the load deviation ratio is greater than a preset deviation threshold, the output voltage of the target transformer is adjusted so that the output voltage of the target transformer matches the real-time load.

[0012] Further, the determining, according to the real-time load, a target transformer with load fluctuations includes:

[0013] Obtain the historical loads of several transformers in the previous time period;

[0014] Calculating the load change value of each transformer according to the historical load and the real-time load;

[0015] When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

[0016] Further, when it is determined that the load deviation ratio is greater than a preset deviation threshold, adjusting the output voltage of the target transformer includes:

[0017] Obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval;

[0018] When it is determined that the voltage adjustment times do not exceed a preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located;

[0019] Determining the voltage adjustment value required for adjusting the target transformer from the voltage adjustment table according to the target load deviation ratio interval;

[0020] According to the target real-time output voltage and the voltage adjustment value, the output voltage of the target transformer is adjusted, and the voltage adjustment times are increased by one.

[0021] Furthermore, after obtaining the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, the method further includes:

[0022] When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that a power supply line corresponding to the target transformer has a fault risk, and a fault warning is issued.

[0023] Another embodiment of the present invention provides a voltage control device for a transformer in a substation, comprising:

[0024] The data acquisition module is used to obtain the real-time output voltage and real-time load of all transformers in the substation, as well as the historical normal load corresponding to each transformer;

[0025] A load detection module, used for determining a target transformer with load fluctuation according to the real-time load;

[0026] A transformer screening module, for determining, according to a target real-time output voltage of the target transformer, a plurality of control transformers having the same target real-time output voltage;

[0027] A load calculation module, used to calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each reference transformer and the historical normal load;

[0028] A ratio calculation module, used for calculating the load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer;

[0029] The voltage adjustment module is used to adjust the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold, so that the output voltage of the target transformer matches the real-time load.

[0030] Furthermore, the load detection module determines the target transformer with load fluctuation according to the real-time load, including:

[0031] Obtain the historical loads of several transformers in the previous time period;

[0032] Calculating the load change value of each transformer according to the historical load and the real-time load;

[0033] When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

[0034] Furthermore, the voltage adjustment module adjusts the output voltage of the target transformer when determining that the load deviation ratio is greater than a preset deviation threshold, including:

[0035] Obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval;

[0036] When it is determined that the voltage adjustment times do not exceed a preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located;

[0037] Determining the voltage adjustment value required for adjusting the target transformer from the voltage adjustment table according to the target load deviation ratio interval;

[0038] According to the target real-time output voltage and the voltage adjustment value, the output voltage of the target transformer is adjusted, and the voltage adjustment times are increased by one.

[0039] Furthermore, after the voltage adjustment module obtains the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, it also includes:

[0040] When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that a power supply line corresponding to the target transformer has a fault risk, and a fault warning is issued.

[0041] Another embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, a voltage control method for a substation transformer as described in any one of the embodiments is implemented.

[0042] Another embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute a voltage control method for a substation transformer as described in any one of the above embodiments.

[0043] The following beneficial effects are achieved by implementing the present invention:

[0044] The present invention discloses a voltage control method, device, terminal equipment, and storage medium for a transformer in a substation. The method first determines a target transformer with load fluctuations in the substation, and then determines the standard load corresponding to the current target real-time output voltage based on the real-time load of a control transformer with the same target real-time output voltage as the target transformer, and then calculates the load deviation ratio between the real-time load of the target transformer and the standard load, and finally adjusts the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold. Therefore, the present invention is based on the fact that the operation of the power system has certain redundancy and stability, and can cope with a certain degree of load fluctuations. Only when the load deviation ratio of the real-time load of the target transformer exceeds the threshold, the output voltage of the transformer is adjusted, which can effectively reduce the number of transformer voltage regulation and extend the service life of the transformer while ensuring stable power supply to the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention is a flowchart of a method for controlling a voltage of a transformer in a substation provided by an embodiment of the present invention.

[0046] Figure 2 It is a structural schematic diagram of a voltage control device for a transformer in a substation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] See also Figure 1 , is a flow chart of a voltage control method for a transformer in a substation provided by an embodiment of the present invention, comprising:

[0055] S1. Obtain the real-time output voltage, real-time load, and historical normal load corresponding to each transformer in the substation;

[0056] In a preferred embodiment of the present invention, taking a transformer of a 35kv substation as an example, the real-time output voltage and real-time load of the transformer are detected by using a sensor pre-installed on the transformer or a detection device in the substation.

[0057] S2. Determine a target transformer with load fluctuation according to the real-time load;

[0058] Preferably, determining the target transformer with load fluctuation according to the real-time load includes:

[0059] S21, obtaining the historical loads of several transformers in the previous time period;

[0060] S22. Calculating the load change value of each transformer according to the historical load and the real-time load;

[0061] S23. When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

[0062] In a preferred embodiment of the present invention, the following formula is used to determine whether the load change value of each transformer exceeds a preset change threshold:

[0063]

[0064] Among them, P t represents the load of the transformer at time t, i.e., the historical load, P t+1 It represents the load of the transformer at the moment t+1, that is, the real-time load, and β is a preset constant.

[0065] S3, according to the target real-time output voltage of the target transformer, determining a plurality of comparison transformers having the same target real-time output voltage;

[0066] S4. Calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each comparison transformer and the historical normal load;

[0067] In a preferred embodiment of the present invention, the standard load corresponding to the target real-time output voltage is calculated by the following formula:

[0068]

[0069] Among them, P s Indicates standard load, P h Indicates the historical normal load, T1≤T≤T2, T1 indicates the time for starting to count the historical normal load, T2 indicates the time for ending to count the historical normal load, T indicates the statistical duration of the historical normal load, and D indicates the real-time output voltage of the control transformer.

[0070] S5. Calculating the load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer;

[0071] S6. When it is determined that the load deviation ratio is greater than a preset deviation threshold, adjust the output voltage of the target transformer so that the output voltage of the target transformer matches the real-time load.

[0072] Preferably, when determining that the load deviation ratio is greater than a preset deviation threshold, adjusting the output voltage of the target transformer includes:

[0073] S61, obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval;

[0074] S62, when it is determined that the voltage adjustment times do not exceed the preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located;

[0075] S63, determining the voltage adjustment value required to be adjusted for the target transformer from the voltage adjustment table according to the target load deviation ratio interval;

[0076] S64. Adjust the output voltage of the target transformer according to the target real-time output voltage and the voltage adjustment value, and increase the voltage adjustment times by one.

[0077] Preferably, after obtaining the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, the method further includes:

[0078] S65. When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that there is a fault risk in the power supply line corresponding to the target transformer, and a fault warning is issued.

[0079] In a preferred embodiment of the present invention, in order to prevent the transformer from performing voltage regulation operations too frequently, resulting in unstable power supply to the power grid and damage to the transformer, this embodiment sets a number threshold, and the number threshold is set according to the number of voltage regulation operations that the transformer can withstand in one day.

[0080] It should be noted that when it is determined that the transformer has experienced the number of voltage adjustments it can withstand in a day, and the load demand corresponding to the transformer still fluctuates greatly, it is determined that adjusting the output voltage of the transformer can no longer cope with the current scenario, and there may be a risk of failure in the power supply line, and maintenance personnel need to be notified to inspect the circuit.

[0081] Secondly, it is considered that temperature is an important factor affecting the internal resistance value of the transformer. When the temperature rises, the resistance value inside the transformer will increase, resulting in a decrease in the output voltage; conversely, when the temperature decreases, the resistance value will decrease and the output voltage will increase. Therefore, in this embodiment, considering the impact of temperature on the output voltage and extending the service life of the transformer, this embodiment also monitors the temperature of the transformer through a temperature sensor, and when it is detected that the temperature of the transformer exceeds a preset threshold, the cooling device is turned on to reduce the temperature of the transformer.

[0082] This embodiment provides a voltage control method for a transformer in a substation, firstly by determining a target transformer with load fluctuations in the substation, and then determining the standard load corresponding to the current target real-time output voltage based on the real-time load of a control transformer with the same target real-time output voltage as the target transformer, and then calculating the load deviation ratio between the real-time load of the target transformer and the standard load, and finally adjusting the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold. Therefore, this embodiment is based on the fact that the operation of the power system has certain redundancy and stability, and can cope with a certain degree of load fluctuations. Only when the load deviation ratio of the real-time load of the target transformer exceeds the threshold, the output voltage of the transformer is adjusted, which can effectively reduce the number of transformer voltage adjustments and extend the service life of the transformer while ensuring stable power supply to the power grid.

[0083] See also Figure 2 , is a schematic structural diagram of a voltage control device for a transformer in a substation provided by an embodiment of the present invention, comprising:

[0084] The data acquisition module is used to obtain the real-time output voltage and real-time load of all transformers in the substation, as well as the historical normal load corresponding to each transformer;

[0085] A load detection module, used for determining a target transformer with load fluctuation according to the real-time load;

[0086] A transformer screening module, for determining, according to a target real-time output voltage of the target transformer, a plurality of control transformers having the same target real-time output voltage;

[0087] A load calculation module, used to calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each reference transformer and the historical normal load;

[0088] A ratio calculation module, used for calculating the load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer;

[0089] The voltage adjustment module is used to adjust the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold, so that the output voltage of the target transformer matches the real-time load.

[0090] Preferably, the load detection module determines the target transformer with load fluctuation according to the real-time load, including:

[0091] Obtain the historical loads of several transformers in the previous time period;

[0092] Calculating the load change value of each transformer according to the historical load and the real-time load;

[0093] When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

[0094] Preferably, the voltage adjustment module adjusts the output voltage of the target transformer when determining that the load deviation ratio is greater than a preset deviation threshold, including:

[0095] Obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval;

[0096] When it is determined that the voltage adjustment times do not exceed a preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located;

[0097] Determining the voltage adjustment value required for adjusting the target transformer from the voltage adjustment table according to the target load deviation ratio interval;

[0098] According to the target real-time output voltage and the voltage adjustment value, the output voltage of the target transformer is adjusted, and the voltage adjustment times are increased by one.

[0099] Preferably, after the voltage adjustment module obtains the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, it also includes:

[0100] When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that a power supply line corresponding to the target transformer has a fault risk, and a fault warning is issued.

[0101] This embodiment provides a voltage control device for a transformer in a substation, which first determines a target transformer with load fluctuations in the substation, and then determines the standard load corresponding to the current target real-time output voltage based on the real-time load of a control transformer with the same target real-time output voltage as the target transformer, and then calculates the load deviation ratio between the real-time load of the target transformer and the standard load, and finally adjusts the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold. Therefore, this embodiment is based on the fact that the operation of the power system has certain redundancy and stability, and can cope with a certain degree of load fluctuations. Only when the load deviation ratio of the real-time load of the target transformer exceeds the threshold, the output voltage of the transformer is adjusted, which can effectively reduce the number of transformer voltage adjustments and extend the service life of the transformer while ensuring stable power supply to the power grid.

[0102] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0103] Those skilled in the art can clearly understand that for the sake of convenience and brevity, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0104] Another preferred embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a voltage control method for a substation transformer as described in any one of the above embodiments is implemented.

[0105] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0106] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0107] The memory can be used to store the computer program, and the processor realizes various functions of the terminal device by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0108] Another preferred embodiment of the present invention provides a storage medium, the storage medium is a computer-readable storage medium, the computer program is stored in the computer-readable storage medium, and the computer program, when executed by the processor, can implement the steps of the above-mentioned various method embodiments. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0109] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A voltage control method for a transformer in a substation, characterized in that: include: Obtain the real-time output voltage, real-time load, and historical normal load of all transformers in the substation; According to the real-time load, determining a target transformer with load fluctuation; According to the target real-time output voltage of the target transformer, determining a plurality of comparison transformers having the same target real-time output voltage; Calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each reference transformer and the historical normal load; Calculating a load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer; When it is determined that the load deviation ratio is greater than a preset deviation threshold, the output voltage of the target transformer is adjusted so that the output voltage of the target transformer matches the real-time load.

2. A voltage control method for a transformer in a substation according to claim 1, characterized in that: The step of determining, according to the real-time load, a target transformer with load fluctuations comprises: Obtain the historical loads of several transformers in the previous time period; Calculating the load change value of each transformer according to the historical load and the real-time load; When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

3. A voltage control method for a transformer in a substation as claimed in claim 2, characterized in that: When it is determined that the load deviation ratio is greater than a preset deviation threshold, adjusting the output voltage of the target transformer includes: Obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval; When it is determined that the voltage adjustment times do not exceed a preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located; Determining the voltage adjustment value required for adjusting the target transformer from the voltage adjustment table according to the target load deviation ratio interval; According to the target real-time output voltage and the voltage adjustment value, the output voltage of the target transformer is adjusted, and the voltage adjustment times are increased by one.

4. A voltage control method for a transformer in a substation as claimed in claim 3, characterized in that: After obtaining the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, it also includes: When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that a power supply line corresponding to the target transformer has a fault risk, and a fault warning is issued.

5. A voltage control device for a transformer in a substation, characterized in that: include: The data acquisition module is used to obtain the real-time output voltage and real-time load of all transformers in the substation, as well as the historical normal load corresponding to each transformer; A load detection module, used for determining a target transformer with load fluctuation according to the real-time load; A transformer screening module, for determining, according to a target real-time output voltage of the target transformer, a plurality of control transformers having the same target real-time output voltage; A load calculation module, used to calculate the standard load corresponding to the target real-time output voltage according to the real-time output voltage of each reference transformer and the historical normal load; A ratio calculation module, used for calculating the load deviation ratio of the target transformer according to the standard load and the real-time load of the target transformer; The voltage adjustment module is used to adjust the output voltage of the target transformer when it is determined that the load deviation ratio is greater than a preset deviation threshold, so that the output voltage of the target transformer matches the real-time load.

6. A voltage control device for a transformer in a substation as claimed in claim 5, characterized in that: The load detection module determines the target transformer with load fluctuation according to the real-time load, including: Obtain the historical loads of several transformers in the previous time period; Calculating the load change value of each transformer according to the historical load and the real-time load; When it is determined that a load change value exceeds a preset change threshold, the transformer corresponding to the load change value is used as a target transformer.

7. A voltage control device for a transformer in a substation as claimed in claim 6, characterized in that: The voltage adjustment module adjusts the output voltage of the target transformer when determining that the load deviation ratio is greater than a preset deviation threshold, including: Obtaining a preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day; wherein the voltage adjustment table records the voltage adjustment value corresponding to each load deviation ratio interval; When it is determined that the voltage adjustment times do not exceed a preset times threshold, determining a target load deviation ratio interval where the load deviation ratio is located; Determining the voltage adjustment value required for adjusting the target transformer from the voltage adjustment table according to the target load deviation ratio interval; According to the target real-time output voltage and the voltage adjustment value, the output voltage of the target transformer is adjusted, and the voltage adjustment times are increased by one.

8. A voltage control device for a transformer in a substation as claimed in claim 7, characterized in that: In the voltage adjustment module, after obtaining the preset voltage adjustment table and the number of voltage adjustments of the target transformer in one day, it also includes: When it is determined that the number of voltage adjustments exceeds a preset number threshold, it is determined that a power supply line corresponding to the target transformer has a fault risk, and a fault warning is issued.

9. A terminal device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a voltage control method for a transformer in a substation is implemented as claimed in any one of claims 1 to 4.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is executed, the device where the storage medium is located is controlled to execute the voltage control method for a substation transformer according to any one of claims 1 to 4.

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