Voltage compensation device, power supply device, and power supply control method

Abstract

According to the voltage compensation device, the power supply device and the power supply control method provided by the invention, the user-side power supply voltage is monitored; generating a voltage compensation control instruction under the condition that the user side power supply voltage is smaller than the user side demand voltage; and the voltage compensation control instruction is sent to the voltage compensation device, so that the voltage compensation device outputs the compensation voltage to provide the compensation voltage for the user side line according to the voltage difference between the user side power supply voltage and the user side demand voltage, the time for carrying out voltage rectification on the low voltage phenomenon is shortened, and the voltage compensation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of power grid boost technology, and in particular to a voltage compensation device, a power supply device, and a power supply control method. Background Technology

[0002] With rapid economic development and increasing electricity load, residential electricity demand has surged. The increasing number of household appliances such as refrigerators, washing machines, and televisions has led to a rapid increase in electricity load, making low-voltage phenomena at the ends of low-voltage distribution lines more likely. Low voltage affects users' normal electricity use and can even cause damage to their equipment. Therefore, power supply companies need to continuously optimize power supply systems to meet the diverse electricity needs of different users.

[0003] In existing technologies, voltage regulation is mainly carried out by means of load cut-off, replacement of low-voltage conductors, and replacement of distribution transformers when dealing with low-voltage phenomena.

[0004] However, the process of rectifying the low voltage phenomenon is time-consuming and cannot meet the power demand of users in a timely manner, thus reducing the efficiency of power supply. Summary of the Invention

[0005] This application provides a voltage compensation device, a power supply device, and a power supply control method to solve the technical problems of long time consumption and low efficiency in the voltage rectification process when dealing with low voltage problems in the prior art.

[0006] In a first aspect, this application provides a voltage compensation device, comprising: a power input line, a power output line, a power supply unit, and a step-down module for data acquisition, a digital-to-analog conversion module, a microcomputer module, and a step-down module for output connected in sequence;

[0007] Wherein, one end of the power input line is used to connect to the transformer line, and the other end of the power input line is connected to the input terminal of the data acquisition step-down module; the output terminal of the output step-down module is connected to one end of the power output line, and the other end of the power output line is used to connect to the user-side line; the power supply unit is connected to the data acquisition step-down module, the digital-to-analog converter module, the microcomputer module and the output step-down module respectively, and is used to provide electrical energy;

[0008] The step-down module for data acquisition is used to acquire the first AC voltage on the power input line and step down the first AC voltage to a second AC voltage according to a preset step-down ratio.

[0009] The digital-to-analog converter module is used to convert the second AC voltage into a digital signal;

[0010] The microcomputer module is used to calculate the compensation voltage based on the digital signal and determine the turns ratio of the output step-down module based on the compensation voltage.

[0011] The output step-down module is used to output the compensation voltage to the user-side line according to the transformation ratio and the AC power provided by the power supply unit.

[0012] Furthermore, the power supply unit includes a battery pack and an inverter. One end of the battery pack is connected to the power input line, the other end of the battery pack is connected to one end of the inverter, and the other end of the inverter is connected to the output step-down module.

[0013] The battery pack is used to output DC voltage;

[0014] The inverter is used to collect the DC voltage output by the battery pack and convert the DC voltage into AC voltage.

[0015] Furthermore, it also includes:

[0016] The device includes a charging switch and a charging circuit. One end of the charging switch is connected to the power input line, and the other end of the charging switch is connected to one end of the charging circuit. The other end of the charging circuit is connected to the power supply unit.

[0017] The device charging switch is used to control the closure of the charging circuit;

[0018] The charging circuit is used to charge the power supply unit.

[0019] Furthermore, it also includes:

[0020] Low voltage compensation start switch, internal power switch, compensation power input switch;

[0021] One end of the low voltage compensation start switch is connected to the power input line, and the other end of the low voltage compensation start switch is connected to the data acquisition step-down module.

[0022] The internal power switch is connected to the power supply unit, the digital-to-analog converter module, and the microcomputer module, respectively.

[0023] One end of the compensation power supply access switch is connected to the output step-down module, and the other end of the compensation power supply access switch is connected to the power output line.

[0024] Furthermore, the internal power switch is used to control the power supply unit to supply power;

[0025] The low voltage compensation start switch is used to control the voltage compensation device to connect to the substation line.

[0026] The compensation power supply access switch is used to control the voltage compensation device to connect to the user-side line.

[0027] Furthermore, it also includes:

[0028] The display screen is connected to the power supply unit and the microcomputer module;

[0029] The display screen is used to display the voltage value of the power input line, the compensation voltage value, the voltage value of the power output line, and the power supply unit's power level.

[0030] Secondly, this application provides a power supply device, comprising:

[0031] The transformer end, voltage compensation device, and user power terminal are connected in sequence.

[0032] The voltage compensation device is as described in the first aspect.

[0033] Thirdly, this application provides a power supply control method, including:

[0034] Monitor the user-side power supply voltage;

[0035] When the user-side power supply voltage is lower than the user-side required voltage, control the connection of the voltage compensation device to provide compensation voltage for the user-side line.

[0036] The voltage compensation device is as described in the first aspect.

[0037] Furthermore, when the user-side power supply voltage is lower than the user-side required voltage, controlling the connection of a voltage compensation device to provide compensation voltage for the user-side line includes:

[0038] When the user-side power supply voltage is lower than the user-side required voltage, a voltage compensation control command is generated.

[0039] The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device provides compensation voltage to the user-side line.

[0040] Further, sending the voltage compensation control command to the voltage compensation device to enable the voltage compensation device to provide compensation voltage to the user-side line includes:

[0041] The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device outputs a compensation voltage to provide compensation voltage for the user-side line based on the voltage difference between the user-side power supply voltage and the user-side demand voltage.

[0042] The voltage compensation device, power supply device, and power supply control method provided in this application monitor the user-side power supply voltage; when the user-side power supply voltage is lower than the user-side demand voltage, a voltage compensation control command is generated; the voltage compensation control command is sent to the voltage compensation device, so that the voltage compensation device outputs a compensation voltage to provide compensation voltage for the user-side line based on the voltage difference between the user-side power supply voltage and the user-side demand voltage, thereby shortening the time for voltage rectification of low voltage phenomena and improving the efficiency of voltage compensation. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 A schematic diagram of the internal structure of the voltage compensation device provided in this application;

[0045] Figure 2 This is a schematic diagram of the power supply device proposed in this application;

[0046] Figure 3 This is a flowchart illustrating an embodiment of the power supply control method proposed in this application;

[0047] Figure 4 A schematic diagram of the external structure of the voltage compensation device provided in this application;

[0048] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0049] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] Existing technologies typically address the problem of insufficient voltage at the end of low-voltage distribution lines by means of load switching, replacement of low-voltage conductors, or distribution transformers. However, these measures generally suffer from drawbacks such as long construction periods and slow response times. They are unable to respond promptly to sudden low-voltage phenomena during peak electricity consumption periods such as holidays or hot weather, resulting in users being in a state of voltage instability for a long time. This not only affects normal electricity use but may also damage electrical equipment, leading to low overall power supply efficiency and service quality.

[0052] To address the problems of slow response, long rectification cycles, and lack of rapid compensation methods on the user side in existing low-voltage power distribution lines during peak electricity consumption periods, this solution proposes a voltage compensation device that can operate independently, can be temporarily connected, and has automatic detection and intelligent compensation capabilities. This device achieves independent power supply through batteries and inverters, and combines a microcomputer control system to complete real-time voltage monitoring and transformer ratio adjustment. This allows the device to be quickly deployed to low-voltage user sites, ensuring power safety and power supply continuity, and filling the gaps in traditional solutions due to slow response and complex operation.

[0053] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0054] Figure 1 This is a schematic diagram of the internal structure of the voltage compensation device provided in this application. Figure 1 As shown, the voltage compensation device proposed in this application is applicable between the main line on the low-voltage side of the distribution transformer and the user side, and is used to compensate the output voltage in real time under low voltage conditions to ensure the voltage at the user end is stable and reliable.

[0055] Specifically, the voltage compensation device includes: a power input line, a power output line, a power supply unit, and a step-down module for data acquisition, a digital-to-analog conversion module, a microcomputer module, and a step-down module for output connected in sequence, as well as supporting devices such as a charging switch, a charging circuit, a low-voltage compensation start switch, an internal power switch, a compensation power input switch, a display module, and a heat dissipation module.

[0056] The power supply unit includes a battery pack and an inverter. One end of the battery pack is connected to the power input line, and the other end of the battery pack is connected to one end of the inverter. The other end of the inverter is connected to the output step-down module.

[0057] The battery pack provides DC power to the voltage compensation device, serving as both a compensation voltage source and a power source for internal modules such as the analog-to-digital converter, microprocessor module, and display screen. Its remaining charge is also monitored by the microprocessor module. The inverter collects the DC voltage output from the battery pack and converts it to AC voltage; specifically, it converts the battery pack's DC power to 220V AC. Through the structure of the battery pack and inverter, the voltage compensation device possesses independent power supply capabilities, allowing it to maintain normal operation even when the external voltage is severely insufficient, thus enhancing the stability of power supply to the user side.

[0058] Specifically, the power inlet line connects the voltage compensation device to the main line on the low-voltage side of the distribution transformer, while the power outlet line connects the voltage compensation device to the user side. The power inlet line includes a live wire inlet and a neutral wire inlet, and the power outlet line includes a live wire outlet and a neutral wire outlet. The neutral wire inlet and outlet lines are directly connected within the voltage compensation device to ensure a continuous neutral wire path. This structure of the power inlet and outlet lines facilitates flexible integration of the voltage compensation device into the existing power grid, enabling rapid deployment without modifying the power distribution system, significantly improving fault response speed and emergency power supply capabilities.

[0059] One end of the power input line is used to connect to the transformer line, and the other end of the power input line is connected to the input terminal of the data acquisition step-down module; the output terminal of the output step-down module is connected to one end of the power output line, and the other end of the power output line is used to connect to the user-side line; the power supply unit is connected to the data acquisition step-down module, the digital-to-analog converter module, the microcomputer module and the output step-down module respectively, and is used to provide electrical energy.

[0060] A step-down module for data acquisition is used to acquire a first AC voltage on the power input line and step down the first AC voltage to a second AC voltage according to a preset step-down ratio. For example, the step-down module steps down the voltage value of the power input line to an AC signal with an amplitude not exceeding 5V using a transformation ratio of 380:5, for processing by the microcomputer module.

[0061] The digital-to-analog converter module is used to convert the second AC voltage into a digital signal. Specifically, the digital-to-analog converter module will convert the analog electrical signal after being stepped down by the step-down module, i.e., the second AC voltage, into a digital electrical signal and input it into the microcomputer module for data processing.

[0062] The microcomputer module is used to calculate the compensation voltage based on the digital signal and determine the turns ratio of the output step-down module based on the compensation voltage. Specifically, the microcomputer module detects the voltage value of the power input line, calculates the compensation voltage value that needs to be compensated, and then adjusts the turns ratio of the output step-down module according to the magnitude of the compensation voltage value. In addition, the microcomputer module also detects the remaining power of the battery pack and the opening and closing status of the compensation power supply connection switch.

[0063] By combining a step-down module, a digital-to-analog converter, and a microcomputer module, the system achieves real-time intelligent identification and calculation adjustment of the voltage connected to the power supply line, overcoming the limitation of traditional voltage compensation devices that rely on manual judgment and improving the response speed of the voltage compensation device.

[0064] The output step-down module is used to output a compensation voltage to the user-side line according to the transformation ratio and the AC power provided by the power supply unit. In this embodiment, the primary winding of the output step-down module has two fixed terminals. The battery pack, after being converted by the inverter, is connected to the two fixed terminals of the primary winding of the output step-down module. The secondary winding of the output step-down module has three terminals: two fixed terminals at the beginning and end, and a movable middle terminal. The movement of the movable terminal is controlled by a microcomputer module. By controlling the movement of the movable terminal, the actual transformation ratio of the output step-down module is controlled. The first end of the secondary winding of the output step-down module is connected to the live wire inlet, and the movable terminal is connected to the live wire outlet (the middle terminal is connected to a compensation power supply switch to control the on / off state of the live wire outlet), thereby connecting the main line on the low-voltage side of the distribution transformer in series with the voltage compensation device. Through this winding structure, the output voltage of the voltage compensation device can be automatically adjusted according to the real-time voltage status to achieve dynamic and refined compensation, significantly improving the stability and flexibility of the voltage compensation effect and avoiding secondary disturbances caused by excessive or insufficient voltage compensation.

[0065] On the other hand, in the voltage compensation device proposed in this application, one end of the device charging switch is connected to the power supply line, the other end of the device charging switch is connected to one end of the charging circuit, and the other end of the charging circuit is connected to the power supply unit.

[0066] The device has a charging switch for controlling the closure of the charging circuit; the charging circuit is used to charge the power supply unit. Specifically, the charging circuit is used to step down, rectify, and regulate the AC power input to charge the battery pack.

[0067] The low voltage compensation start-up voltage is activated when the voltage compensation device starts to compensate the user-side voltage. The internal power supply is the control switch that provides working power to each module by the power supply unit. The compensation power supply access switch is used to connect the voltage output by the power supply unit to the main line of the low-voltage side of the distribution transformer after being stepped down by the output step-down module. This switch is a semi-automatic switch. Under normal circumstances, it is operated manually. When it is in the closed state, if the voltage value of the power supply line reaches 215V, the microcomputer module can automatically control the switch to open automatically.

[0068] One end of the low voltage compensation start switch is connected to the power supply line, and the other end of the low voltage compensation start switch is connected to the step-down module for data acquisition. The low voltage compensation start switch is used to control the voltage compensation device to connect to the substation line.

[0069] The internal power switch is connected to the power supply unit, the digital-to-analog converter module and the microcomputer module respectively. The internal power switch is used to control the power supply unit to supply power.

[0070] One end of the compensation power supply access switch is connected to the output step-down module, and the other end of the compensation power supply access switch is connected to the power output line. The compensation power supply access switch is used to control the connection of the voltage compensation device to the user side line.

[0071] The voltage compensation device proposed in this application also includes a display screen and a heat dissipation grid. The display screen is connected to the power supply unit and the microcomputer module. Exemplarily, the display screen can be an LCD screen, used to display the voltage value of the power input line, the compensation voltage value, the voltage value of the power output line, and the power level of the power supply unit. Displaying key information through this human-machine interface improves the user's monitoring convenience. The heat dissipation grid is used for heat dissipation of the voltage compensation device. It has a built-in small fan to accelerate heat dissipation, ensuring the thermal stability of the voltage compensation device under high-efficiency operation and extending the service life of the voltage compensation device.

[0072] The voltage compensation device proposed in this application constructs an independent power supply module through a battery and an inverter, and combines it with a microcomputer-controlled adjustable output step-down system to achieve real-time dynamic compensation for low voltage on the user side. It has the advantages of automatic monitoring, high voltage regulation accuracy, quick deployment, and no need to modify the original power distribution structure. It can effectively solve the problems of slow response, long construction period, and easy damage to user equipment in the prior art, and significantly improve the emergency handling capability of the power supply system and the safety of user electricity use.

[0073] Figure 2 This is a schematic diagram of the power supply device proposed in this application. Figure 2 As shown, the power supply device 200 includes a transformer terminal 201, a voltage compensation device 202, and a user power terminal 203, which are connected in sequence to form a power supply device 200 with intelligent compensation function.

[0074] The transformer end 201 is used to step down the medium voltage to a low voltage output and connect to the power input terminal of the voltage compensation device 202. The voltage compensation device 202 is set between the transformer end 201 and the user and is used to detect and compensate for low voltage caused by line aging, long distance or load fluctuation. Finally, the stabilized voltage is output to the user's power supply end 203 to ensure that the user obtains a stable 220V AC power.

[0075] Specifically, the voltage compensation device 202 integrates a battery, inverter, microcomputer module, adjustable output module, and display. It features real-time voltage monitoring, automatic calculation of compensation amount, dynamic adjustment of transformer ratio, and connection of compensation voltage. During operation, if the microcomputer module detects that the input voltage is lower than a set threshold (e.g., 205V), it automatically controls the connection of the compensation power supply and adjusts the output transformer ratio to ensure a continuous and stable 220V voltage for the user side. When the detected voltage recovers to above 215V, the compensation power supply will be automatically disconnected to prevent overcompensation.

[0076] The power supply device 200 proposed in this application embodiment can be quickly deployed and achieve intelligent and stable voltage control without relying on traditional line modification methods, which improves the flexibility and adaptability of the power supply system. It is especially suitable for emergency scenarios such as short-term load surges or insufficient voltage for remote users, and significantly enhances the stability, safety and continuity of power supply on the user side.

[0077] Figure 3 This is a flowchart illustrating an embodiment of the power supply control method proposed in this application. Figure 3 As shown, it includes:

[0078] S301, Monitor the user-side power supply voltage.

[0079] In this embodiment of the application, the voltage compensation device uses an internal acquisition step-down module to step down the high-voltage signal from the incoming power supply line (i.e., the user's power input) according to a preset ratio (e.g., 380V to 5V) to generate a low-voltage AC signal with an amplitude not exceeding 5V; then, the analog signal is converted into a digital signal by a digital-to-analog converter module and transmitted to the microcomputer module.

[0080] The microcomputer module analyzes the digital voltage signal in real time to determine whether the current user-side power supply voltage is lower than the set required voltage (set to 220V in this embodiment). If the voltage is lower than the threshold (e.g., 205V), automatic compensation control is performed.

[0081] S302. When the power supply voltage on the user side is lower than the required voltage on the user side, control the connection of the voltage compensation device to provide compensation voltage for the user side line.

[0082] Specifically, when the user-side power supply voltage is lower than the user-side required voltage, a voltage compensation control command is generated.

[0083] The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device provides compensation voltage to the user-side line.

[0084] The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device can determine the voltage difference based on the user-side supply voltage and the user-side demand voltage, and output the compensation voltage based on the voltage difference to provide compensation voltage for the user-side line.

[0085] Specifically, when the microprocessor module detects that the power input voltage is lower than a set threshold (e.g., less than 205V), it automatically generates a voltage compensation control command, triggering the compensation process. This includes:

[0086] The microcomputer module automatically generates control commands and calculates the required compensation voltage U based on the measured wire voltage value U0. 补偿 The calculation formula is as follows:

[0087]

[0088] Meanwhile, the microcomputer module calculates the turns ratio n of the output step-down module based on the compensation voltage, using the following formula:

[0089]

[0090] Then, the output compensation is automatically adjusted. The microcomputer module controls the movable terminal inside the step-down module to make precise position adjustments based on the calculated transformation ratio n, so as to achieve transformation ratio matching and dynamically adjust the output AC voltage, so that the compensation voltage of the final output voltage of the system together with the input voltage constitutes a stable 220V power supply.

[0091] Finally, the automatic control switch is connected, the microcomputer module generates a control signal, which causes the compensation power supply to be connected to the switch and the compensation voltage output by the step-down module is connected in series to the main line, thereby injecting the required compensation voltage into the user line.

[0092] In addition, in this embodiment, the power supply input voltage is continuously monitored. When the voltage is detected to recover to 215V or above, the microcomputer module automatically generates a disconnect command to control the compensation power supply connection switch to automatically trip, so as to avoid the problem of excessive voltage caused by continued compensation.

[0093] In this step, the compensation access and exit processes are both completed automatically by the microcomputer module, realizing closed-loop automatic control of "monitoring-judgment-control-exit", effectively improving response speed and ease of use, and solving the problems of complex manual operation, large delay and high risk in the existing technology.

[0094] This application embodiment automates all the steps that originally required manual judgment and operation, such as voltage monitoring, compensation voltage calculation, output ratio adjustment, and compensation power supply connection, by having the system's built-in microcomputer module perform them automatically. This enables real-time identification and intelligent compensation when the user-side voltage is abnormal. It has significant advantages such as no need for manual intervention, fast response speed, and high control precision. It effectively solves the problems of cumbersome manual operation, delayed compensation, and unstable power supply in the prior art, and significantly improves the safety and continuity of power supply for low-voltage users.

[0095] Figure 4 This is a schematic diagram of the external structure of the voltage compensation device provided in this application. Figure 4 As shown, the voltage compensation device integrates a variety of functional components on its surface, making it easy for users to operate and monitor. The overall design is compact and modular, facilitating on-site deployment and temporary access.

[0096] Its main external structure includes: a line interface area, an operation control area, a status display area, and a heat dissipation area. The line interface area includes live wire and neutral wire inlet interfaces, and live wire and neutral wire outlet interfaces. The live wire and neutral wire inlet interfaces are used to connect to the main power supply line from the low-voltage side of the distribution transformer; the live wire and neutral wire outlet interfaces are used to output the compensated voltage to the user's electricity meter. All inlet and outlet interfaces are located on the top of the voltage compensation device for easy and intuitive wiring operations and to reduce space occupation.

[0097] The operation control area has four control buttons: a device charging switch, a low-voltage compensation start switch, a compensation power supply connection switch, and an internal power switch. The device charging switch controls the charging of the internal battery pack; the low-voltage compensation start switch controls the voltage compensation device to enter compensation operation mode; the compensation power supply connection switch controls the connection of the compensation voltage to the user power supply circuit; and the internal power switch activates the internal power circuit to supply power to each module.

[0098] The status display area is equipped with an LCD screen to display information such as power input voltage, compensation voltage, output voltage, compensation switch status, and battery power in real time, making it convenient for maintenance personnel to monitor the system's operating status.

[0099] The heat dissipation area is equipped with heat dissipation grilles and a built-in small fan to improve internal heat exchange efficiency and ensure long-term stable operation of the device under high load conditions.

[0100] The voltage compensation device proposed in this application combines functional requirements with ease of operation. It features a clear human-machine interface, good thermal management capabilities, and convenient wiring and disassembly logic. It is suitable for temporary deployment in various low-voltage scenarios, effectively improving on-site work efficiency and device operation stability, and supporting power supply companies to respond quickly and provide accurate compensation in emergency or overload scenarios.

[0101] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 5 As shown, the electronic device 50 includes:

[0102] The electronic device 50 may include a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a communication component 503, and other components. The processor 501, memory 502, and communication component 503 are connected via a bus 504.

[0103] In the specific implementation process, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to execute the power supply control method described above.

[0104] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0105] In the above Figure 5 In the illustrated embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0106] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0107] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0108] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0109] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0110] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0111] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0112] When integrated units / modules are implemented in hardware, the hardware can be digital circuits, analog circuits, etc. The physical implementation of the hardware structure includes, but is not limited to, transistors, memristors, etc. Unless otherwise specified, the processor can be any suitable hardware processor, such as a CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the storage unit can be any suitable magnetic or magneto-optical storage medium, such as Resistive Random Access Memory (RRAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Enhanced Dynamic Random Access Memory (EDRAM), High-Bandwidth Memory (HBM), Hybrid Memory Cube (HMC), etc.

[0113] If the integrated unit / module is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0114] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0115] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0116] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A voltage compensation device, characterized in that, include: The system includes a power input line, a power output line, a power supply unit, and a step-down module for data acquisition, a digital-to-analog converter, a microcomputer module, and a step-down module for output, all connected in sequence. Wherein, one end of the power input line is used to connect to the transformer line, and the other end of the power input line is connected to the input terminal of the data acquisition step-down module; the output terminal of the output step-down module is connected to one end of the power output line, and the other end of the power output line is used to connect to the user-side line; the power supply unit is connected to the data acquisition step-down module, the digital-to-analog converter module, the microcomputer module and the output step-down module respectively, and is used to provide electrical energy; The step-down module for data acquisition is used to acquire the first AC voltage on the power input line and step down the first AC voltage to a second AC voltage according to a preset step-down ratio. The digital-to-analog converter module is used to convert the second AC voltage into a digital signal; The microcomputer module is used to calculate the compensation voltage based on the digital signal and determine the turns ratio of the output step-down module based on the compensation voltage. The output step-down module is used to output the compensation voltage to the user-side line according to the transformation ratio and the AC power provided by the power supply unit.

2. The voltage compensation device according to claim 1, characterized in that, The power supply unit includes a battery pack and an inverter. One end of the battery pack is connected to the power input line, and the other end of the battery pack is connected to one end of the inverter. The other end of the inverter is connected to the output step-down module. The battery pack is used to output DC voltage; The inverter is used to collect the DC voltage output by the battery pack and convert the DC voltage into AC voltage.

3. The voltage compensation device according to claim 1 or 2, characterized in that, Also includes: The device includes a charging switch and a charging circuit. One end of the charging switch is connected to the power input line, and the other end of the charging switch is connected to one end of the charging circuit. The other end of the charging circuit is connected to the power supply unit. The device charging switch is used to control the closure of the charging circuit; The charging circuit is used to charge the power supply unit.

4. The voltage compensation device according to claim 1 or 2, characterized in that, Also includes: Low voltage compensation start switch, internal power switch, compensation power input switch; One end of the low voltage compensation start switch is connected to the power input line, and the other end of the low voltage compensation start switch is connected to the data acquisition step-down module. The internal power switch is connected to the power supply unit, the digital-to-analog converter module, and the microcomputer module, respectively. One end of the compensation power supply access switch is connected to the output step-down module, and the other end of the compensation power supply access switch is connected to the power output line.

5. The voltage compensation device according to claim 4, characterized in that, The internal power switch is used to control the power supply unit to supply power. The low voltage compensation start switch is used to control the voltage compensation device to connect to the substation line. The compensation power supply access switch is used to control the voltage compensation device to connect to the user-side line.

6. The voltage compensation device according to claim 1 or 2, characterized in that, Also includes: The display screen is connected to the power supply unit and the microcomputer module; The display screen is used to display the voltage value of the power input line, the compensation voltage value, the voltage value of the power output line, and the power supply unit's power level.

7. A power supply device, characterized in that, include: The transformer end, voltage compensation device, and user power terminal are connected in sequence. The voltage compensation device is as described in claims 1 to 6.

8. A power supply control method, characterized in that, include: Monitor the user-side power supply voltage; When the user-side power supply voltage is lower than the user-side required voltage, control the access voltage compensation device to provide compensation voltage for the user-side line; The voltage compensation device is as described in claims 1 to 6.

9. The power supply control method according to claim 8, characterized in that, When the user-side power supply voltage is lower than the user-side required voltage, control the connection of a voltage compensation device to provide compensation voltage for the user-side line, including: When the user-side power supply voltage is lower than the user-side required voltage, a voltage compensation control command is generated. The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device provides compensation voltage to the user-side line.

10. The power supply control method according to claim 9, characterized in that, Sending the voltage compensation control command to the voltage compensation device so that the voltage compensation device provides compensation voltage to the user-side line includes: The voltage compensation control command is sent to the voltage compensation device so that the voltage compensation device determines the voltage difference based on the user-side power supply voltage and the user-side demand voltage, and outputs a compensation voltage based on the voltage difference to provide compensation voltage for the user-side line.

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