Power scheduling method, device and equipment for three-phase inverter and storage medium
By separating the power dispatch quantity of the three-phase inverter, independently processing the average component and the difference component, and generating a reference value for power adjustment, the conflict problem caused by the three-phase inverter under independent control is solved, and the system stability and fast response are achieved.
Patent Information
- Application Number
- CN202511553843.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-01-06
AI Technical Summary
In a three-phase inverter with independent phase control, the three phases are not completely independent, which can easily lead to conflicts during the tracking and scheduling process, affecting system stability and power dispatch speed.
By separating the average and differential components of the three-phase power dispatch quantity, processing them independently and working in concert, a three-phase power reference value is generated and fed back to the inverter for power adjustment, thereby achieving overall and local balance control of the system.
It improves the system's response speed and power control accuracy, solves the system fluctuation problem caused by phase scheduling conflicts, and ensures the stability and balance of the three-phase inverter.
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Figure CN121282964A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of power conversion, in particular to a power scheduling method and device for a three-phase inverter, equipment and a storage medium. BACKGROUND
[0002] With the global energy transformation to clean and distributed, three-phase inverters as core energy conversion units need to realize bidirectional power flow of PV surplus power on-grid, dispatching energy storage battery power on-grid, and taking power from the grid to charge the energy storage battery, while stably supplying power to the load in the scene. In the household and small industrial and commercial storage scenes, the load is mostly single-phase load, which is randomly and unevenly connected to a phase in the three-phase system, leading to three-phase power imbalance, which may affect the safety and stability of the power system.
[0003] In order to realize three-phase power balance, the independent control of each phase is usually adopted to realize power scheduling, that is, an independent control loop is set up for each phase of the three-phase inverter, and each control loop is only responsible for the power scheduling of the corresponding phase. However, in the independent control of each phase, the three phases are not completely independent, and the three phases share a direct current source, which leads to conflicts in the tracking and scheduling process, resulting in fluctuations in the entire system and affecting the stability of the system. SUMMARY
[0004] In order to help solve the problem that in the independent control of each phase, the three phases are not completely independent, which may cause conflicts in the tracking and scheduling process, resulting in fluctuations in the entire system and affecting the stability of the system, the present application provides a power scheduling method, device, equipment and storage medium for a three-phase inverter.
[0005] In the first aspect, the present application provides a power scheduling method for a three-phase inverter, which adopts the following technical scheme: the method is applied to a power scheduling system, the power scheduling system is used to control a three-phase inverter, and the method comprises: obtaining a three-phase power scheduling quantity and controlling the three-phase inverter to adjust the power output of the three-phase inverter according to the three-phase power scheduling quantity; obtaining a three-phase power actual value after the output power of the three-phase inverter is adjusted; when the three-phase power actual value is obtained, calculating and generating a three-phase power reference value according to a scheduling average component and a scheduling difference component of the three-phase power scheduling quantity and the three-phase power actual value; feeding back the three-phase power reference value to the three-phase inverter and controlling the three-phase inverter to adjust the output power according to the three-phase power reference value; obtaining the three-phase power actual value after the adjustment of the output of the three-phase inverter again.
[0006] In one specific implementation, the calculation of the dispatch average component includes:
[0007] wherein, , and represent the three-phase power dispatch quantities of the three-phase inverters A, B, and C, respectively, represents the dispatch average component. The calculation of the dispatch difference component includes:
[0008]
[0009]
[0010] wherein, , and represent the three-phase power dispatch quantities of the three-phase inverters A, B, and C, respectively, represents the dispatch average component, , and represent the dispatch difference components of the three-phase inverters A, B, and C, respectively.
[0011] In one specific implementation, the calculation and generation of the three-phase power reference values according to the dispatch average component and the dispatch difference component of the three-phase power dispatch quantities and the three-phase power actual values includes: calculating and generating three-phase cumulative error values according to the dispatch difference components and the three-phase power actual values; calculating and generating three-phase power adjustment values according to the three-phase cumulative error values; calculating and generating the three-phase power reference values according to the three-phase power adjustment values and the dispatch average component.
[0012] In one specific implementation, the calculation and generation of the three-phase cumulative error values according to the dispatch difference components and the three-phase power actual values includes: calculating and generating three-phase error values according to the dispatch difference components and the three-phase power actual values; the calculation of the three-phase error values includes:
[0013]
[0014]
[0015] wherein, , and respectively represent the scheduling difference components of the three-phase inverters A, B, C three phases, , and respectively represent the three-phase power actual values of the three-phase inverters A, B, C three phases, , and respectively represent the three-phase error values of the three-phase inverters A, B, C three phases; the three-phase cumulative error values are calculated and generated according to the three-phase error values; the calculation method of the three-phase cumulative error values comprises:
[0016]
[0017]
[0018] wherein, represents a time constant coefficient, , and respectively represent the three-phase cumulative error values of the three-phase inverters A, B, C three phases.
[0019] In a specific implementable scheme, the calculation and generation of the three-phase power adjustment values according to the three-phase cumulative error values comprises: the error mean value is calculated and generated according to the three-phase cumulative error values; the three-phase power adjustment values are calculated and generated according to the error mean value and the three-phase cumulative error values.
[0020] In a specific implementable scheme, the calculation and generation of the error mean value according to the three-phase cumulative error values comprises:
[0021] wherein, , and respectively represent the three-phase cumulative error values of the three-phase inverters A, B, C three phases, represents the error mean value; the calculation and generation of the three-phase power adjustment values according to the error mean value and the three-phase cumulative error values comprises:
[0022]
[0023]
[0024] wherein, , and respectively represent three-phase power adjustment values of the three-phase inverter A, B, C three phases, represents an error mean value, , and respectively represent three-phase power adjustment values of the three-phase inverter A, B, C three phases.
[0025] In one specific implementation, the calculation and generation of the three-phase power reference value according to the three-phase power adjustment value and the scheduling average component includes:
[0026]
[0027]
[0028] wherein, , and respectively represent three-phase power adjustment values of the three-phase inverter A, B, C three phases, represents the scheduling average component, , and respectively represent three-phase power reference values of the three-phase inverter A, B, C three phases.
[0029] In a second aspect, the application provides a power scheduling device for a three-phase inverter, which adopts the following technical solution: the device is applied to a power scheduling system, the power scheduling system is used to control a three-phase inverter, and the device comprises: a scheduling quantity acquisition module, which is used to acquire a three-phase power scheduling quantity and control the three-phase inverter to adjust the power output of the three-phase inverter according to the three-phase power scheduling quantity; an actual value output module, which is used to acquire a three-phase power actual value after the adjustment of the output power of the three-phase inverter; a reference value generation module, which is used to calculate and generate a three-phase power reference value according to a scheduling average component and a scheduling difference component of the three-phase power scheduling quantity and the three-phase power actual value when the three-phase power actual value is obtained; a reference value feedback module, which is used to feed back the three-phase power reference value to the three-phase inverter and control the three-phase inverter to adjust the output power according to the three-phase power reference value; an actual value adjustment module, which is used to acquire the three-phase power actual value after the adjustment of the output of the three-phase inverter again.
[0030] In a third aspect, the present application provides a computer device, which adopts the technical scheme as follows: comprising a memory and a processor, the memory stores a computer program capable of being loaded and executed by the processor to perform any of the above power scheduling methods for a three-phase inverter.
[0031] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the technical scheme as follows: storing a computer program capable of being loaded and executed by the processor to perform any of the above power scheduling methods for a three-phase inverter.
[0032] In summary, the present application has the following beneficial technical effects: By separately calculating the average component and the difference component of the three-phase power scheduling quantity, the two are independently processed and cooperated, the problem of system fluctuation and instability caused by phase scheduling conflict can be solved, thereby realizing the balance control of the whole system and the local system, and further the power scheduling tracking of the three-phase inverter can be better realized; at the same time, the response speed and the power control precision of the system can be improved. In addition, in the present application, the control logic is realized in a modular way, which is easy to implement in engineering and is suitable for power balance or unbalance scheduling in scenarios such as three-phase four-wire inverter grid connection (single machine, parallel machine), off-grid parallel machine, etc., thereby expanding the application scenarios. BRIEF DESCRIPTION OF DRAWINGS
[0033] Figure 1 is a flowchart of the power scheduling method for a three-phase inverter in the embodiment of the present application; Figure 2 is a schematic diagram of the power scheduling device for a three-phase inverter in the embodiment of the present application; Figure 3 is a schematic diagram of the computer device in the embodiment of the present application.
[0034] Reference signs: 201, scheduling quantity acquisition module; 202, actual value output module; 203, reference value generation module; 204, reference value feedback module; 205, actual value adjustment module. DETAILED DESCRIPTION
[0035] The following will be described in detail in combination with Figures 1-3 The present application will be further described in detail.
[0036] This application discloses a power dispatching method for three-phase inverters. This method is applicable to power balance or imbalance dispatching scenarios for three-phase four-wire inverters in grid-connected (single-unit, parallel) and off-grid parallel operation. By separating the average and differential components of the three-phase power, this method controls the overall power dispatching level and the imbalance portion of each phase of the three-phase inverter separately. This ensures the overall stability of the power dispatching output of the three-phase inverter while enabling precise and rapid response to the dispatching of the imbalance portion of the three-phase power. Focusing on the differential components for processing results in faster response speed and higher control accuracy.
[0037] The global energy transition is towards cleaner, distributed energy. Three-phase inverters, as core energy conversion units, need to achieve bidirectional power flow: surplus PV power going to the grid, dispatching power from energy storage batteries to the grid, and drawing power from the grid to charge energy storage batteries, while simultaneously providing stable power to loads within the scenario. In residential, small commercial, and industrial energy storage scenarios, loads are mostly single-phase. These loads may randomly and unevenly connect to one phase of the three-phase system, leading to three-phase power imbalance, which could potentially affect the safety and stability of the power system.
[0038] To achieve three-phase power balance, power dispatch is typically implemented using independent phase control. This means each phase of the three-phase inverter has its own independent control loop, with each loop responsible for power dispatching only the corresponding phase. However, in this independent phase control method, the three phases are not completely independent; they share a single DC source. This can lead to conflicts during the tracking and dispatching process, causing system fluctuations and affecting system stability. Furthermore, the independent phase control method does not decouple the average and differential components of the three-phase power, resulting in slow dynamic response and slow power dispatching speed, thus impacting overall system efficiency. To improve system response speed and stability, this application provides a power dispatching method for three-phase inverters.
[0039] Reference Figure 1 The method includes the following steps: S10: Obtain the three-phase power dispatch quantity and control the three-phase inverter to adjust the power output of the three-phase inverter according to the three-phase power dispatch quantity.
[0040] Specifically, to obtain the three-phase power dispatch quantity , and Three-phase power dispatch can be understood as a power dispatch command. Upon receiving a power dispatch command, the three-phase inverter is controlled to adjust the output power value according to the command. Specifically, the three-phase power dispatch... , and It can be obtained through energy management system (EMS) dispatch instructions, calculation of the three-phase power demand of the machine, commands from the host in the parallel system, etc., without any restrictions.
[0041] S20: Obtain the actual three-phase power value after the three-phase inverter output power adjustment.
[0042] Specifically, after receiving a power dispatch command, the system obtains the power output value of the three-phase inverter adjusted according to the power dispatch command. The adjusted power output value of the three-phase inverter is the actual three-phase power value.
[0043] S30: When the actual value of the three-phase power is obtained, the reference value of the three-phase power is calculated and generated based on the average component and the difference component of the three-phase power dispatch quantity and the actual value of the three-phase power.
[0044] Specifically, after the system obtains the actual three-phase power values, it calculates and generates three-phase power reference values based on the difference between the received three-phase power dispatch quantity and the actual three-phase power values. Specifically, when calculating the reference values, the system first calculates the average and differential components of the three-phase power dispatch quantity, separating the overall horizontal component and the differential components of each phase. These are then processed independently, which can resolve potential conflicts that may arise from adjustments in the independent phase control method, thereby improving system stability.
[0045] S40 feeds back the three-phase power reference value to the three-phase inverter, controlling the three-phase inverter to adjust the output power according to the three-phase power reference value.
[0046] Specifically, after calculating the three-phase power reference value, the reference value is fed back to the three-phase inverter. The three-phase inverter will adjust the output power according to the reference value and output the adjusted actual three-phase power value again.
[0047] S50, once again obtains the adjusted actual value of the three-phase power output from the three-phase inverter.
[0048] Specifically, after the three-phase inverter adjusts its output power, it outputs the adjusted actual power value again and transmits the adjusted actual power value to the control system. The control system will cycle through the tracking and scheduling of the output power, so that the output power of the three-phase inverter always follows the input scheduling command to maintain the balance of the output power of the three-phase inverter, thereby ensuring the stability of the system.
[0049] In this application, by separately calculating the average and differential components of the three-phase power dispatch quantity, and processing them independently yet working synergistically, the problem of system fluctuations and instability caused by phase dispatch conflicts can be solved. This achieves overall and local balance control of the system, thereby enabling better power dispatch tracking of the three-phase inverter. Simultaneously, it also improves the system's response speed and power control accuracy. Furthermore, the control logic in this application is implemented in a modular manner. Modularity facilitates engineering implementation and is applicable to power balance or imbalance dispatch scenarios for three-phase four-wire inverters connected to the grid (single unit, parallel unit) and off-grid parallel units, expanding the application scenarios.
[0050] In one embodiment, the method of calculating and generating a three-phase power reference value based on the average and differential components of the three-phase power dispatch quantity and the actual value of the three-phase power can be specifically implemented as follows: First, the average dispatch component and the dispatch difference component are generated based on the three-phase power dispatch quantities; the calculation method of the average dispatch component can be expressed as:
[0051] in, , and These represent the three-phase power dispatch quantities for phases A, B, and C of the three-phase inverter, respectively. This represents the average component of the schedule.
[0052] Then, based on the dispatch average component, dispatch difference component, and actual three-phase power values, a three-phase power reference value is calculated and generated; the dispatch difference component can be calculated as follows:
[0053]
[0054]
[0055] in, , and These represent the three-phase power dispatch quantities for phases A, B, and C of the three-phase inverter, respectively. Represents the average component of the schedule. , and These represent the scheduling difference components of phases A, B, and C of the three-phase inverter, respectively.
[0056] In this application, hierarchical control is achieved by separating the average and differential components of the three-phase power dispatch quantity. The differential component is dispatched. , and It can focus on handling the imbalance between three-phase power dispatch, and the dispatch average component. It can ensure the overall stability of the power dispatching level of a three-phase system. Through hierarchical control of the average component and the differential component, it is possible to adjust the differences between each phase while maintaining the overall system target, making the control logic clearer and thus solving the problem of conflicts in power regulation that lead to system instability.
[0057] In one embodiment, the method of calculating and generating three-phase power reference values based on the dispatch average component, dispatch difference component, and actual three-phase power values can be specifically implemented as follows: First, the three-phase cumulative error value is calculated and generated based on the dispatch difference component and the actual three-phase power value. Specifically, the three-phase error value is first calculated and generated based on the dispatch difference component and the actual three-phase power value; the calculation method of the three-phase error value can be expressed as follows:
[0058]
[0059]
[0060] in, , and These represent the scheduling difference components of phases A, B, and C of the three-phase inverter, respectively. , and These represent the actual three-phase power values of phases A, B, and C of the three-phase inverter, respectively. , and These represent the three-phase error values for phases A, B, and C of the three-phase inverter, respectively.
[0061] After generating the single-phase error value, the three-phase cumulative error value is calculated and generated based on the three-phase error value; the calculation method for the three-phase cumulative error value can be expressed as follows:
[0062]
[0063]
[0064] in, Represents the time constant coefficient. , and These represent the cumulative three-phase error values for phases A, B, and C of the three-phase inverter, respectively.
[0065] The three-phase error value can be understood as the error between the three-phase scheduling difference components of the three-phase inverters (A, B, and C) and the actual three-phase power value within the current cycle. The three-phase cumulative error value, on the other hand, represents the cumulative error between the three-phase scheduling difference components of the three-phase inverters (A, B, and C) and the actual three-phase power value within a certain time period. The integral speed can be determined by the time constant coefficient. Adjustments are made. When calculating the cumulative error value, the deviation of each phase's differential component is integrated, ensuring that the goal of integral adjustment is to eliminate the deviation of the three-phase imbalance, rather than the overall offset. By accumulating the error of the differential component of each phase's scheduling through integral action, steady-state imbalance can be eliminated.
[0066] After calculating the cumulative error values for each phase, the three-phase power adjustment values are calculated and generated based on the three-phase cumulative error values. Specifically, the mean error is first calculated and generated based on the three-phase cumulative error values; the mean error can be calculated as follows:
[0067] in, , and These represent the three-phase cumulative error values for phases A, B, and C of the three-phase inverter, respectively. This represents the mean error.
[0068] Then, the three-phase power adjustment value is calculated and generated based on the mean error and the cumulative three-phase error value; the calculation method of the three-phase power adjustment value can be expressed as follows:
[0069]
[0070]
[0071] in, , and These represent the three-phase cumulative error values for phases A, B, and C of the three-phase inverter, respectively. Indicates the mean error. , and These represent the three-phase power adjustment values for phases A, B, and C of the three-phase inverter, respectively.
[0072] Calculating the power adjustment value can offset common offsets in the three-phase integral, such as the cumulative integral due to overall disturbances, while retaining only the relative differences between phases. This ensures that the adjustment is used only to compensate for the imbalance in three-phase scheduling, preventing the overall level from being biased by integral errors. Simultaneously, the mean error... The introduction of this can avoid the overall integral saturation caused by the simultaneous accumulation of the three-phase integrals; overall integral saturation means that the three-phase integrals deviate together, causing the overall output to deviate from the target.
[0073] Power adjustment value , and It only reflects the relative differences in the scheduling quantities of each phase, ensuring that the integral action always focuses on the control of the unbalanced part, rather than the meaningless overall offset, thus improving the dynamic response speed and steady-state control accuracy.
[0074] Finally, based on the three-phase power adjustment value and the dispatch average component, a three-phase power reference value is calculated and generated; the calculation method for the three-phase power reference value can be expressed as follows:
[0075]
[0076]
[0077] in, , and These represent the three-phase power adjustment values for phases A, B, and C of the three-phase inverter, respectively. Represents the average component of the schedule. , and These represent the three-phase power reference values for phases A, B, and C of the three-phase inverter, respectively.
[0078] The calculation of the reference value retains The overall target level it represents can ensure the stability of the average amplitude of the system output, and also through... , and The power adjustment value reflects the differences in power dispatching amounts across each phase. The calculation method for this reference value allows the system to quickly adjust using average and differential components when facing local disturbances (such as sudden changes in power dispatching of a single phase) or overall power dispatching disturbances, ensuring overall output stability. This scheme enables each phase output to both follow the overall target and achieve balanced or unbalanced dispatching quickly and accurately through single-phase compensation, balancing overall stability and local balance, thus improving the robustness of the control system.
[0079] In summary, this reference value calculation scheme can avoid integral saturation and overall offset, improving the stability of the system under long-term operation or rapid changes in scheduling commands; in addition, it can balance overall stability and local balance, improving the robustness of the control system.
[0080] Figure 1This is a flowchart illustrating a power dispatching method for a three-phase inverter in one embodiment. It should be understood that, although... Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows; unless explicitly stated otherwise, there is no strict order requirement for the execution of these steps, and they can be executed in other orders; and Figure 1 At least some of the steps in the process 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 executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.
[0081] Based on the above method, this application also discloses a power dispatching device for a three-phase inverter.
[0082] Reference Figure 2 The device includes the following modules: The scheduling quantity acquisition module 201 is used to acquire the three-phase power scheduling quantity and control the three-phase inverter to adjust the power output of the three-phase inverter according to the three-phase power scheduling quantity; The actual value output module 202 is used to obtain the actual value of the three-phase power after the output power of the three-phase inverter is adjusted. The reference value generation module 203 is used to calculate and generate a three-phase power reference value based on the dispatch average component and dispatch difference component of the three-phase power dispatch quantity and the actual value of the three-phase power when the actual value of the three-phase power is obtained. The reference value feedback module 204 is used to feed back the three-phase power reference value to the three-phase inverter and control the three-phase inverter to adjust the output power according to the three-phase power reference value. The actual value adjustment module 205 is used to obtain the adjusted actual value of the three-phase power output from the three-phase inverter again.
[0083] In one embodiment, the calculation method of the scheduling average component in the reference value generation module 203 includes:
[0084] in, , and These represent the three-phase power dispatch quantities for phases A, B, and C of the three-phase inverter, respectively. Indicates the average component of the schedule; The calculation methods for scheduling difference components include:
[0085]
[0086]
[0087] in, , and These represent the three-phase power dispatch quantities for phases A, B, and C of the three-phase inverter, respectively. Represents the average component of the schedule. , and These represent the scheduling difference components of phases A, B, and C of the three-phase inverter, respectively.
[0088] In one embodiment, the reference value generation module 203 is specifically used to calculate and generate a three-phase cumulative error value based on the scheduling difference component and the actual three-phase power value; calculate and generate a three-phase power adjustment value based on the three-phase cumulative error value; and calculate and generate a three-phase power reference value based on the three-phase power adjustment value and the scheduling average component.
[0089] In one embodiment, the reference value generation module 203 is specifically used to calculate and generate a three-phase error value based on the scheduling difference component and the actual three-phase power value; the calculation method of the three-phase error value includes:
[0090]
[0091]
[0092] in, , and These represent the scheduling difference components of phases A, B, and C of the three-phase inverter, respectively. , and These represent the actual three-phase power values of phases A, B, and C of the three-phase inverter, respectively. , and These represent the three-phase error values for phases A, B, and C of the three-phase inverter, respectively. The three-phase cumulative error value is calculated and generated based on the three-phase error value; the calculation method for the three-phase cumulative error value includes:
[0093]
[0094]
[0095] in, Represents the time constant coefficient. , and These represent the cumulative three-phase error values for phases A, B, and C of the three-phase inverter, respectively.
[0096] In one embodiment, the reference value generation module 203 is specifically used to calculate and generate the average error value based on the three-phase cumulative error value; and to calculate and generate the three-phase power adjustment value based on the average error value and the three-phase cumulative error value.
[0097] In one embodiment, the reference value generation module 203 is specifically used to calculate and generate the average error value based on the three-phase cumulative error value, and the calculation method includes:
[0098] in, , and These represent the three-phase cumulative error values for phases A, B, and C of the three-phase inverter, respectively. Indicates the mean error; This is used to calculate and generate three-phase power adjustment values based on the mean error and the cumulative three-phase error value. The calculation method includes:
[0099]
[0100]
[0101] in, , and These represent the three-phase cumulative error values for phases A, B, and C of the three-phase inverter, respectively. Indicates the mean error. , and These represent the three-phase power adjustment values for phases A, B, and C of the three-phase inverter, respectively.
[0102] In one embodiment, the reference value generation module 203 is specifically used to calculate and generate a three-phase power reference value based on the three-phase power adjustment value and the dispatch average component. The calculation method includes:
[0103]
[0104]
[0105] in, , and These represent the three-phase power adjustment values for phases A, B, and C of the three-phase inverter, respectively. Represents the average component of the schedule. , and These represent the three-phase power reference values for phases A, B, and C of the three-phase inverter, respectively.
[0106] The power dispatching device for a three-phase inverter provided in this application embodiment can be applied to the power dispatching method for a three-phase inverter as provided in the above embodiment. For relevant details, please refer to the above method embodiment. The implementation principle and technical effect are similar, and will not be repeated here.
[0107] It should be noted that the power dispatching device for a three-phase inverter provided in this embodiment is only illustrated by the division of the above-mentioned functional modules / units. In practical applications, the above functions can be assigned to different functional modules / units as needed, that is, the internal structure of the power dispatching device for a three-phase inverter can be divided into different functional modules / units to complete all or part of the functions described above. Furthermore, the implementation method of the power dispatching method for a three-phase inverter provided in the above method embodiments and the implementation method of the power dispatching device for a three-phase inverter provided in this embodiment belong to the same concept. The specific implementation process of the power dispatching device for a three-phase inverter provided in this embodiment is detailed in the above method embodiments and will not be repeated here.
[0108] This application also discloses a computer device.
[0109] Specifically, such as Figure 3 As shown, the computer device can be a desktop computer, laptop computer, handheld computer, or cloud server, etc. The computer device may include, but is not limited to, a processor and memory. The processor and memory can be connected via a bus or other means. The processor can be a Central Processing Unit (CPU). The processor can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, graphics processing units (GPUs), embedded neural network processing units (NPUs) or other dedicated deep learning coprocessors, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above types of chips.
[0110] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the methods in the above embodiments of this application. The processor executes various functional applications and data processing by running the non-transitory software programs, instructions, and modules stored in the memory, thereby implementing the methods in the above embodiments. The memory may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created by the processor, etc. Furthermore, the memory may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
[0111] This application also discloses a computer-readable storage medium.
[0112] Specifically, the computer-readable storage medium is used to store a computer program, which, when executed by a processor, implements the methods described in the above-described method embodiments. Those skilled in the art will understand that implementing all or part of the processes in the methods described in the above-described embodiments of this application can be accomplished by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.
[0113] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A power scheduling method for a three-phase inverter, characterized by: The method is applied to a power scheduling system for controlling a three-phase inverter, and comprises: obtaining a three-phase power scheduling quantity, and controlling the three-phase inverter to adjust power output of the three-phase inverter according to the three-phase power scheduling quantity; obtaining a three-phase power actual value after the three-phase inverter output power is adjusted; when the three-phase power actual value is obtained, calculating and generating a three-phase power reference value according to a scheduling average component and a scheduling difference component of the three-phase power scheduling quantity and the three-phase power actual value; feeding back the three-phase power reference value to the three-phase inverter, and controlling the three-phase inverter to adjust output power according to the three-phase power reference value; again obtaining the three-phase power actual value after the three-phase inverter output is adjusted.
2. The method of claim 1, wherein: The calculation manner of the scheduling average component comprises: wherein, , and represent three-phase power scheduling quantities of the three-phase inverter A, B, C, respectively, represents the scheduling average component; The calculation manner of the scheduling difference component comprises: wherein, , and represent the three-phase power scheduling quantities of the three phases of the three-phase inverter A, B, C, respectively, represents the scheduling average component, , and represent the scheduling difference components of the three phases of the three-phase inverter A, B, C, respectively.
3. The method of claim 1, wherein: The calculation and generation of the three-phase power reference value according to the scheduling average component and the scheduling difference component of the three-phase power scheduling quantity and the three-phase power actual value comprises: calculating and generating a three-phase cumulative error value according to the scheduling difference component and the three-phase power actual value; calculating and generating a three-phase power adjustment value according to the three-phase cumulative error value; calculating and generating the three-phase power reference value according to the three-phase power adjustment value and the scheduling average component.
4. The method of claim 3, wherein: The calculation and generation of the three-phase cumulative error value according to the scheduling difference component and the three-phase power actual value comprises: calculating and generating a three-phase error value according to the scheduling difference component and the three-phase power actual value; the calculation manner of the three-phase error value comprises: wherein, , and respectively represent the scheduling difference components of the three-phase inverters A, B, C, , and respectively represent the three-phase power actual values of the three-phase inverters A, B, C, , and respectively represent the three-phase error values of the three-phase inverters A, B, C. calculating and generating the three-phase cumulative error value according to the three-phase error value; the calculation manner of the three-phase cumulative error value comprises: wherein, denotes a time constant coefficient, , and denote three-phase cumulative error values of the three phases A, B, C of the three-phase inverter, respectively.
5. The method of claim 3, wherein: The calculation and generation of the three-phase power adjustment value according to the three-phase cumulative error value comprises: calculating and generating an error average value according to the three-phase cumulative error value; calculating and generating the three-phase power adjustment value according to the error average value and the three-phase cumulative error value.
6. The method of claim 5, wherein: The calculation and generation of the error average value according to the three-phase cumulative error value comprises: wherein, , and respectively represent three-phase cumulative error values of the three phases A, B, C of the three-phase inverter, represents an error mean value; The calculation and generation of the three-phase power adjustment value according to the error average value and the three-phase cumulative error value comprises: wherein, , and denote three-phase cumulative error values of the three-phase inverter A, B, C three phases, respectively, denotes an error mean value, , and denote three-phase power adjustment values of the three-phase inverter A, B, C three phases, respectively.
7. The method of claim 3, wherein: The calculation and generation of the three-phase power reference value according to the three-phase power adjustment value and the scheduling average component comprises: wherein, , and represent three-phase power reference values for the three phases A, B, C of the three-phase inverter, respectively. represents the dispatch average component, , and represent three-phase power reference values for the three phases A, B, C of the three-phase inverter, respectively.
8. A power scheduling apparatus for a three-phase inverter, characterized by: The device is applied to a power scheduling system for controlling a three-phase inverter, and comprises: a scheduling quantity obtaining module (201) for obtaining a three-phase power scheduling quantity, and controlling the three-phase inverter to adjust power output of the three-phase inverter according to the three-phase power scheduling quantity; an actual value output module (202) for obtaining a three-phase power actual value after the three-phase inverter output power is adjusted; a reference value generation module (203) for, when the three-phase power actual value is obtained, calculating and generating a three-phase power reference value according to a scheduling average component and a scheduling difference component of the three-phase power scheduling quantity and the three-phase power actual value; a reference value feedback module (204) configured to feed back the three-phase power reference value to the three-phase inverter, so that the three-phase inverter adjusts output power according to the three-phase power reference value; an actual value adjustment module (205) configured to acquire the adjusted three-phase power actual value output by the three-phase inverter again.
9. A computer device, comprising: A computer program product comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded and executed by the processor to perform any one of the methods of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, A computer program capable of being loaded and executed by the processor to perform any one of the methods of claims 1 to 7.