Inverter control method and device, equipment and storage medium

Abstract

The invention provides an inverter control method and device, equipment and a storage medium, and particularly relates to the technical field of inverter control, and the method comprises the steps: a processor obtains the output electric power of a power grid in a t-th time period; if the output electric power of the power grid in the t-th time period is smaller than the output electric power of the preset power grid, calculating the target output electric power of the inverter in the t-th time period according to the output electric power of the power grid in the t-th time period; and controlling the photovoltaic power supply equipment to output standard power supply voltage according to the target output electric power of the inverter in the tth time period.

Description

Technical Field

[0001] The present application relates to the field of inverter control technology, and in particular to an inverter control method, device, equipment and storage medium. Background Art

[0002] The input end of the communication terminal is connected to an inverter, which can convert the AC power output from the power grid into DC power and input it into the communication terminal to provide power support for the communication terminal.

[0003] However, in some remote areas or outdoor workspaces, traditional power grids lack sufficient coverage, resulting in insufficient power input to communication terminals. This not only limits the deployment of communication terminals but also increases maintenance costs and complexity. Furthermore, even in areas with a power supply, power outages are common. These can be caused by grid failures, natural disasters, or other unpredictable factors. Communication terminals cannot function properly during power outages, disrupting communications and affecting the real-time transmission and processing of information. Even if the power supply appears normal, power quality may not meet standards. Power quality issues include voltage fluctuations, frequency instability, and harmonic interference.

[0004] Insufficient power input from the power grid to the communication terminal may damage the electronic components of the communication terminal, shorten the service life of the communication terminal, and even cause data loss or errors in the communication terminal. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide an inverter control method, device, equipment and storage medium to solve the above problems, stabilize the input voltage of the inverter, and thereby maintain sufficient power input from the inverter to the communication terminal.

[0006] In a first aspect, an embodiment of the present application provides an inverter control method, the method comprising: The processor obtains the output power of the power grid in the tth time period; If the output power of the power grid in the tth time period is less than the preset output power of the power grid, the processor calculates the target output power of the inverter in the tth time period according to the output power of the power grid in the tth time period; The processor controls the photovoltaic power supply device to output a standard power supply voltage according to the target output power of the inverter in the tth time period.

[0007] Preferably, the step of the processor calculating the target output power of the inverter in the tth time period according to the output power of the power grid in the tth time period includes: The target output power of the inverter in time period t is calculated as follows:

[0008] in, is the target output power of the inverter in the tth time period, is the proportional gain, is the output power of the power grid in the tth time period, is the output power of the preset grid, is the integration time constant, is the differential time constant.

[0009] Preferably, the method further comprises: The processor obtains the available power of the battery in the tth time period; The processor calculates the state of charge value of the battery in the tth time period according to the available power of the battery in the tth time period; If the state of charge value of the battery in the tth time period is greater than the upper limit of the state of charge value, the processor controls the photovoltaic power supply device to stop outputting the standard power supply voltage and controls the battery to output the standard power supply voltage.

[0010] Preferably, the step of the processor calculating the state of charge value of the battery in the tth time period according to the available power of the battery in the tth time period includes: The calculation formula of the battery state of charge value in time period t is as follows:

[0011] in, is the state of charge of the battery in the tth time period, is the available power of the battery in time period t, This is the standard capacity of the battery.

[0012] Preferably, the method further comprises: If the state of charge value of the battery in the tth time period is less than the state of charge value lower limit, the processor controls the battery to stop outputting the standard supply voltage.

[0013] Preferably, the method further comprises: If the power level of the battery is less than or equal to a preset power threshold, the processor controls the power grid to charge the battery.

[0014] The inverter control method provided in this application brings the following beneficial effects: This application provides an inverter control method in which a processor obtains the output power of the power grid during time period t. If the output power of the power grid during time period t is less than a preset power grid output power, the target output power of the inverter during time period t is calculated based on the output power of the power grid during time period t. Based on the target output power of the inverter during time period t, the photovoltaic power supply device is controlled to output a standard power supply voltage. This method determines the power supply status of the power grid at that time by determining the output power of the power grid, and further determines whether it is necessary to control the photovoltaic power supply device to output a standard power supply voltage to compensate for insufficient power supply from the power grid. This method ensures timely switching to inverter power supply when the power grid's power quality is poor.

[0015] In a second aspect, the present application further provides an inverter control device, the device comprising: An acquisition module, configured to acquire the output power of the power grid in time period t; a calculation module, configured to calculate a target output power of the inverter for the tth time period based on the output power of the grid for the tth time period if the output power of the grid for the tth time period is less than a preset output power of the grid; The control module is used to control the photovoltaic power supply device to output a standard power supply voltage according to the target output electric power of the inverter in the tth time period.

[0016] The inverter control device provided in the embodiment of the present application has the same technical features as the inverter control method provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0017] In a third aspect, the present application provides a computing device, including a memory and a processor; One or more computer programs are stored in the memory, and the one or more computer programs include instructions; when the instructions are executed by the processor, the computing device executes the method as described in any one of the first aspects.

[0018] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program for executing the method as described in any one of the first aspects.

[0019] In a fifth aspect, the present application provides a computer program product, which includes one or more computer instructions. When the computer instructions are executed by a computer, the computer executes the method as described in any one of the first aspects.

[0020] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic flow chart of an inverter control method provided in an embodiment of the present application; Figure 2 A schematic diagram of the power supply system structure provided in an embodiment of the present application; Figure 3 A schematic structural diagram of an inverter control device provided in an embodiment of the present application; Figure 4 A schematic diagram of a computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of this application.

[0025] To facilitate understanding of this embodiment, the embodiments of this application are described in detail below.

[0026] The embodiment of the present application provides an inverter control method, such as Figure 1 As shown, Figure 1 A flow chart of an inverter control method provided in an embodiment of the present application. The method comprises the following steps: S101: The processor obtains the output power of the power grid in time period t.

[0027] Specifically, the processor collects the voltage of the power grid in the tth time period and the current in the tth time period through the voltage sensor and the current transformer, and calculates the output electric power of the power grid in the tth time period based on the voltage of the power grid in the tth time period and the current in the tth time period.

[0028] The calculation formula for the output power of the power grid in time period t is as follows:

[0029] in, is the output power of the power grid in the tth time period, is the voltage of the grid in time period t, is the current of the grid in the tth time period.

[0030] S102, the processor determines whether the output power of the power grid in the tth time period is less than the preset output power of the power grid, if so, executes step S103, if not, executes step S105.

[0031] Specifically, the processor determines whether the power supply of the power grid in the tth time period is sufficient by determining whether the output power of the power grid in the tth time period is less than the output power of the preset power grid.

[0032] S103: The processor calculates the target output power of the inverter in the tth time period according to the output power of the power grid in the tth time period.

[0033] Specifically, the target output power of the inverter in time period t is calculated as follows:

[0034] in, is the target output power of the inverter in the tth time period, is the proportional gain, is the output power of the power grid in the tth time period, is the output power of the preset grid, is the integration time constant, is the differential time constant.

[0035] More specifically, if the grid's output power is less than the preset grid output power, it indicates that one phase of the grid is overloaded, causing a voltage drop, while the other two phases are lightly loaded and functioning normally. This indicates that the grid is in a three-phase imbalanced state, and the grid alone is insufficient to support the inverter's output power to meet the load's demands. Therefore, it is necessary to calculate the inverter's output power, which corresponds to the amount of power required to meet the load's demands—the inverter's target output power.

[0036] S104: The processor controls the photovoltaic power supply device to output a standard power supply voltage according to the target output power of the inverter in the tth time period.

[0037] Specifically, if Figure 2 As shown, Figure 2 A schematic diagram of the power supply system structure provided in an embodiment of the present application.

[0038] The output of photovoltaic power supply device 206 is connected to the first input of inverter 204 via maximum power point tracking controller 205. The output of battery 201 is connected to the second input of inverter 204. The output of inverter 204 is connected to the first input of two-way selector 203, and the first output of grid 202 is connected to the second input of two-way selector 203. The output of two-way selector 203 is connected to the input of the load.

[0039] When power grid 202 is in a three-phase unbalanced state, photovoltaic power supply device 206 is prioritized for supplying power to inverter 204 via maximum power point tracking controller 205. The processor reversely derives the voltage input to the first input terminal of inverter 204 based on the target output power of inverter 204. As can be seen from the above, the voltage output by photovoltaic power supply device 206 via maximum power point tracking controller 205 must be consistent with the voltage at the first input terminal of inverter 204. Based on this, the processor can determine the output power of photovoltaic power supply device 206 and control photovoltaic power supply device 206 to output a standard supply voltage to compensate for the power shortage of power grid 202.

[0040] Inverter 204, comprised of multiple capacitors, IGBTs (Insulated Gate Bipolar Transistors), power inductors, and other components, converts AC to DC and DC to AC. This capability allows inverter 204 to smooth out the energy properties of the AC power input to its first input terminal. Furthermore, this DC-to-AC capability allows inverter 204 to output the target output power to dual selector 203, mitigating low voltage and excessive oscillations in grid 202. Inverter 204 can provide a maximum of 10 kW of power compensation to grid 202, addressing three-phase imbalance in grid 202. Furthermore, dual selector 203 can output both 110V AC and 220V AC, providing different power supply options for loads (communication terminals).

[0041] Such a configuration can always maintain the normal output of the inverter 204, thereby ensuring that when the power grid 202 is insufficient, that is, when the grid 202 is in a three-phase unbalanced state, the inverter 204 can still support the reorganized power supply to the load and keep the load in a stable and reliable working state.

[0042] S105 , the processor controls the power grid to output a standard power supply voltage according to the target output power of the inverter in the tth time period.

[0043] Specifically, if the output power of the power grid is greater than or equal to the preset output power of the power grid, it means that the power grid is supplying power normally, and the power grid continues to output the standard power supply voltage.

[0044] An embodiment of the present application provides an inverter control method in which a processor obtains the output power of a power grid during a time period t. If the output power of the power grid during the time period t is less than a preset output power of the power grid, the target output power of the inverter during the time period t is calculated based on the output power of the power grid during the time period t. Based on the target output power of the inverter during the time period t, the photovoltaic power supply device is controlled to output a standard supply voltage. This method determines the power supply status of the power grid by determining the output power of the power grid, and further determines whether it is necessary to control the photovoltaic power supply device to output a standard supply voltage to compensate for insufficient power supply from the power grid. This method ensures timely switching to inverter power when the power grid's power supply quality is poor. In the prior art, powering the load solely through the power grid can lead to insufficient power input from the power grid to the communication terminal in the event of a power outage, voltage fluctuation, frequency instability, harmonic interference, and the like. This can damage the electronic components of the communication terminal and shorten the service life of the communication terminal.

[0045] Compared with existing technologies, this method can use photovoltaic power supply equipment to power the inverter when the power grid is insufficient, thereby maintaining normal power supply to the load through the inverter, ensuring the normal operation of the load in real time. This method improves the power supply stability and reliability of the power supply system, ensures the normal power supply to the load, and thus extends the service life of the load.

[0046] In one embodiment, the processor obtains the available power of the battery in the tth time period, and calculates the state of charge value of the battery in the tth time period according to the available power of the battery in the tth time period.

[0047] Specifically, the calculation formula of the battery state of charge value in the tth time period is as follows:

[0048] in, is the state of charge of the battery in the tth time period, is the available power of the battery in time period t, This is the standard capacity of the battery.

[0049] If the state of charge value of the battery in the tth time period is greater than the upper limit of the state of charge value, the processor controls the photovoltaic power supply device to stop outputting the standard supply voltage and controls the battery to output the standard supply voltage. If the state of charge value of the battery in the tth time period is less than the lower limit of the state of charge value, the processor controls the battery to stop outputting the standard supply voltage.

[0050] Specifically, the upper limit of the state of charge is 95%, and the lower limit is 5%. Because the battery is a lithium battery, continuing to charge when the state of charge is 95% will cause the lithium ions in the lithium battery to be excessively embedded in the negative electrode material, triggering the growth of lithium dendrites, piercing the separator, causing internal short circuits, and even thermal runaway.

[0051] The battery is powered by a photovoltaic power supply device, so the photovoltaic power supply device must be stopped at this time to prevent the battery from exceeding the safe voltage range due to continuous charging. When the battery's state of charge value is less than the lower limit of the state of charge value, the battery is insufficient and cannot normally power the load. At this time, the photovoltaic power supply device must be started to power the load and charge the battery.

[0052] In this approach, the processor calculates the battery's state of charge (SOC) and promptly stops charging the battery to prevent damage. When the SOC falls below the lower SOC limit, the PV power supply is activated to power the load and charge the battery. This approach extends the battery's lifespan and ensures proper operation.

[0053] In one embodiment, if the power level of the battery is less than or equal to a preset power threshold, the processor controls the power grid to charge the battery.

[0054] Specifically, if Figure 2 As shown, Figure 2 A schematic diagram of the power supply system structure provided in an embodiment of the present application.

[0055] The second output terminal of the power grid 202 is connected to the third input terminal of the dual selector 203. The third input terminal of the dual selector 203 is connected to the charging terminal of the battery 201 through the inverter 204. If the power level of the battery 201 is less than or equal to the preset power threshold, it means that the power level of the battery 201 is insufficient to support power supply to the load. In this case, the power grid 202 charges the battery 201 through the charging terminal of the battery 201.

[0056] In this manner, the battery 201 with insufficient power can be charged through the power grid 202, so that the battery 201 maintains sufficient power in real time, thereby ensuring that the battery 201 can normally supply power to the load.

[0057] Based on the above method embodiment, the embodiment of the present application further provides an inverter control device, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of an inverter control device provided in an embodiment of the present application. The device includes: an acquisition module 31, a calculation module 32, and a control module 33. The functions of each module are as follows: An acquisition module 31 is configured to acquire the output power of the power grid in a time period t; a calculation module 32 configured to calculate a target output power of the inverter for the tth time period based on the output power of the grid for the tth time period if the output power of the grid for the tth time period is less than a preset output power of the grid; The control module 33 is configured to control the photovoltaic power supply device to output a standard power supply voltage according to the target output power of the inverter in the tth time period.

[0058] Preferably, the calculation module 32 is specifically configured to calculate the target output power of the inverter in the tth time period according to the following formula:

[0059] in, is the target output power of the inverter in the tth time period, is the proportional gain, is the output power of the power grid in the tth time period, is the output power of the preset grid, is the integration time constant, is the differential time constant.

[0060] Preferably, the acquisition module 31 is further configured to acquire the available power of the battery in the tth time period; The calculation module 32 is further configured to calculate the state of charge of the battery in the tth time period according to the available power of the battery in the tth time period; The control module 33 is further configured to control the photovoltaic power supply device to stop outputting the standard power supply voltage and control the battery to output the standard power supply voltage if the state of charge value of the battery in the tth time period is greater than the upper limit of the state of charge value.

[0061] Preferably, the calculation module 32 is specifically configured to calculate the state of charge value of the battery in the tth time period according to the following formula:

[0062] in, is the state of charge of the battery in the tth time period, is the available power of the battery in time period t, This is the standard capacity of the battery.

[0063] Preferably, the control module 33 is further configured to control the battery to stop outputting the standard supply voltage if the state of charge value of the battery in the tth time period is less than a lower limit of the state of charge value.

[0064] Preferably, the control module 33 is further configured to control the grid equipment to charge the battery if the battery power level is less than or equal to a preset power level threshold.

[0065] The inverter control device provided in the embodiment of the present application has the same technical features as the inverter control method provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0066] The present application also provides a computing device. Figure 4 As shown, this figure is a schematic diagram of a computing device provided by an embodiment of the present application, wherein the computing device 400 includes a bus 401, a processor 402, a communication interface 403, and a memory 404. The processor 402, the memory 404, and the communication interface 403 communicate with each other via the bus 401.

[0067] The bus 401 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0068] The processor 402 may be any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0069] Communication interface 403 is used for external communication. Memory 404 may include volatile memory, such as random access memory (RAM). Memory 404 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0070] The memory 404 stores executable codes, and the processor 402 executes the executable codes to perform the aforementioned inverter control method.

[0071] Embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium can be any available medium capable of storing data on a computing device, or a data storage device such as a data center that contains one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, hard disk, or magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive). The computer-readable storage medium includes instructions that instruct the computing device to execute the above method.

[0072] The present application also provides a computer program product comprising one or more computer instructions that, when loaded and executed on a computing device, fully or partially generate the process or function described in the present application.

[0073] The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer or data center to another website, computer or data center via wired (e.g., coaxial cable, optical fiber) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0074] When the computer program product is executed by a computer, the computer performs any of the aforementioned inverter control methods. The computer program product may be a software installation package. When any of the aforementioned inverter control methods is required, the computer program product may be downloaded and executed on the computer.

[0075] The descriptions of the processes or structures corresponding to the above figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0076] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. An inverter control method, characterized in that: The method comprises: The processor obtains the output power of the power grid in the tth time period; If the output power of the power grid in the tth time period is less than the preset output power of the power grid, the processor calculates the target output power of the inverter in the tth time period according to the output power of the power grid in the tth time period; The processor controls the photovoltaic power supply device to output a standard power supply voltage according to the target output power of the inverter in the tth time period.

2. The inverter control method according to claim 1, characterized in that: The step of calculating, by the processor, the target output power of the inverter in the tth time period according to the output power of the power grid in the tth time period includes: The target output power of the inverter in time period t is calculated as follows: in, is the target output power of the inverter in the tth time period, is the proportional gain, is the output power of the power grid in the tth time period, is the output power of the preset grid, is the integration time constant, is the differential time constant.

3. The inverter control method according to claim 1, wherein: The method further comprises: The processor obtains the available power of the battery in the tth time period; The processor calculates the state of charge value of the battery in the tth time period according to the available power of the battery in the tth time period; If the state of charge value of the battery in the tth time period is greater than the upper limit of the state of charge value, the processor controls the photovoltaic power supply device to stop outputting the standard power supply voltage and controls the battery to output the standard power supply voltage.

4. The inverter control method according to claim 1, wherein: The step of the processor calculating the state of charge value of the battery in the tth time period according to the available power of the battery in the tth time period includes: The calculation formula of the battery state of charge value in time period t is as follows: in, is the state of charge of the battery in the tth time period, is the available power of the battery in time period t, This is the standard capacity of the battery.

5. The inverter control method according to claim 3, wherein: The method further comprises: If the state of charge value of the battery in the tth time period is less than the state of charge value lower limit, the processor controls the battery to stop outputting the standard supply voltage.

6. The inverter control method according to claim 3, wherein: The method further comprises: If the power level of the battery is less than or equal to a preset power threshold, the processor controls the power grid to charge the battery.

7. An inverter control device, characterized in that: The device comprises: An acquisition module, configured to acquire the output power of the power grid in time period t; a calculation module, configured to calculate a target output power of the inverter for the tth time period based on the output power of the grid for the tth time period if the output power of the grid for the tth time period is less than a preset output power of the grid; The control module is used to control the photovoltaic power supply device to output a standard power supply voltage according to the target output electric power of the inverter in the tth time period.

8. A computing device, characterized in that including memory and processor; One or more computer programs are stored in the memory, and the one or more computer programs include instructions; when the instructions are executed by the processor, the computing device executes the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The computer program product comprises one or more computer instructions. When the computer instructions are executed by a computer, the computer performs the method according to any one of claims 1 to 6.

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