Simulation method, device, equipment and medium for series partial power converter

Abstract

The embodiment of the present application relates to the field of power electronics technology, and discloses a simulation method, device, equipment and medium for a series partial power converter. A real-time simulator runs a simulation model of a photovoltaic storage station, sends a data signal of the photovoltaic storage station to a data acquisition device through an Ethernet interface, and sends an analog signal of the photovoltaic storage station to a power amplifier; the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, and sends the data signal in a unified format to the series partial power converter; the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter; the series partial power converter calculates the unified format data signal and the analog signal to obtain a command signal, and sends the command signal to the real-time simulator through the data acquisition device for simulation. Thus, the functional indicators of the series partial power converter are comprehensively and accurately verified, and the efficiency of equipment research and development is accelerated.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of power electronics technology, and in particular to a simulation method, device, equipment and medium for a series partial power converter. Background Art

[0002] Series Partial Power Converter (SPPC) is a special power converter that establishes an electrical connection between the power source and the load and only processes the power generated by the voltage difference between the source and the load. This design aims to solve the problems of traditional full-power DC converters in terms of efficiency, power density, cost, heat dissipation, etc. Series partial power converters are widely used in battery energy storage systems, electric vehicle fast charging stations and other fields due to their high efficiency, low cost and high power density.

[0003] However, the design of series partial power converters is highly complex and places strict requirements on the accuracy and real-time performance of the control algorithm. Traditional pure digital simulation is difficult to fully simulate the complex dynamic processes under actual working conditions. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a simulation method, device, equipment and medium for a series partial power converter, so that various complex working conditions can be simulated in a virtual hardware simulation environment to verify whether the various functions and performances of the series partial power converter device meet the expected design goals.

[0005] According to some embodiments of the present application, a first aspect of the embodiments of the present application provides a simulation method for a series partial power converter, wherein a real-time simulation machine is connected to a data acquisition device and a power amplifier, and the data acquisition device and the power amplifier are connected to the series partial power converter; the method comprises: the real-time simulation machine runs a photovoltaic storage station simulation model, sends a data signal of the photovoltaic storage station to the data acquisition device, and sends an analog signal of the photovoltaic storage station to the power amplifier, wherein the photovoltaic storage station simulation model is used to simulate a real photovoltaic storage station operation system; the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, and sends the data signal in a unified format to the series partial power converter, the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter, the series partial power converter calculates the data signal in a unified format and the analog signal to obtain an instruction signal, and sends the instruction signal to the real-time simulation machine through the data acquisition device for simulation, wherein the instruction signal includes an active power instruction and a reactive power instruction.

[0006] In some embodiments, the photovoltaic power station simulation model includes an energy storage power station, a photovoltaic power station, an AC power grid and a transformer, including: the energy storage power station and the photovoltaic power station are respectively connected to the AC power grid through the transformer; the energy storage power station includes N parallel energy storage units, wherein N is an integer greater than 1; the photovoltaic power station includes N parallel photovoltaic units, wherein N is an integer greater than 1; the current output by a single photovoltaic unit is multiplied to simulate the total power output by multiple photovoltaic units; the current output by a single energy storage unit is multiplied to simulate the total power output by multiple energy storage units.

[0007] In some embodiments, the multiplication operation includes: setting the multiplication number of the photovoltaic single-machine model or the energy storage single-machine model through the first port to realize the scenario of multiple photovoltaic models or energy storage models connected in parallel; filtering the input current signal; and controlling the controlled current source to be connected to the grid according to instructions.

[0008] In some embodiments, the photovoltaic and energy storage station simulation model is built on a host computer, including: packaging photovoltaic and energy storage stand-alone controller source code; compiling the controller source code to obtain a library file; configuring the library file into the real-time simulation machine to achieve the integration of control strategy and stand-alone main circuit, and generate a photovoltaic and energy storage stand-alone packaging model.

[0009] In some embodiments, the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, including: collecting the voltage, current, active power and reactive power of the energy storage power station and the photovoltaic power station; and converting the voltage, current, active power and reactive power into data formats respectively to obtain a data signal in a unified format.

[0010] In some embodiments, the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter, including: the power amplifier receives the analog signal of the photovoltaic storage station through the AI ​​interface; amplifies the analog signal to obtain an amplified analog signal; and sends the amplified analog signal to the series partial power converter.

[0011] In some embodiments, the series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator through a data acquisition device for simulation, including:

[0012] The series partial power converter sends the data signal in a unified format and the analog signal to an internal control algorithm program to generate an active power instruction and a reactive power instruction; the active power instruction and the reactive power instruction are sent to the data acquisition device through an internal communication method; the data acquisition device sends the active power instruction and the reactive power to a simulation model in a real-time simulator; the simulation model in the real-time simulator controls each unit in the energy storage power station and the photovoltaic power station to operate according to the power instruction to balance the power of the entire system.

[0013] According to some embodiments of the present application, the second aspect of the embodiments of the present application further provides a simulation device for a series partial power converter, wherein a real-time simulation machine is connected to a data acquisition device and a power amplifier, and the data acquisition device and the power amplifier are connected to the series partial power converter; the device comprises: a first data acquisition module: the real-time simulation machine runs a photovoltaic storage station simulation model, sends the data signal of the photovoltaic storage station to the data acquisition device through an Ethernet interface, and sends the analog signal of the photovoltaic storage station to the power amplifier, wherein the photovoltaic storage station simulation model is used to simulate a real photovoltaic storage station operation system; a data processing module: the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, and sends the data signal in a unified format to the series partial power converter; a second data acquisition module: the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter; a simulation module: the series partial power converter calculates the data signal in a unified format and the analog signal to obtain an instruction signal, and sends the instruction signal to the real-time simulation machine through the data acquisition device for simulation, wherein the instruction signal comprises an active power instruction and a reactive power instruction.

[0014] According to some embodiments of the present application, a third aspect of the embodiments of the present application also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the simulation method of the series partial power converter as described above.

[0015] According to some embodiments of the present application, a fourth aspect of the embodiments of the present application further provides a computer-readable storage medium, which, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, performs the simulation method of the series partial power converter as described above.

[0016] The technical solution provided in the embodiment of the present application has at least the following advantages:

[0017] By constructing a hardware-in-the-loop simulation test method for a series partial power converter, on the one hand, it is possible to fully verify the precision and accuracy of the hardware sampling loop and internal communication loop of the series partial power converter, which is helpful to discover problems in the design or manufacturing process of the series partial power converter and provide a basis for subsequent optimization and improvement; on the other hand, various scenarios of the series partial power converter in actual applications are simulated in a simulation environment to test and verify whether the control strategy of the series partial power converter is effective and whether the various functional indicators meet expectations, so as to avoid possible omissions and deviations after the equipment is put into operation, which may cause economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 is a flow chart of a simulation method for a series partial power converter according to an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of a simulation system of a series partial power converter according to an embodiment of the present application;

[0021] Figure 3 is a topology diagram of a solar-storage station simulation model system according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a multiplication circuit according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of a simulation device for a series partial power converter according to an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In the related technology, most of the power between the power source and the load is transmitted directly between the two through a feedforward path. The series partial power converter establishes an electrical connection between the power source and the load and only processes the power generated by the voltage difference between the source and the load, thereby solving the problems of traditional full-power DC converters in terms of efficiency, power density, cost, heat dissipation, etc. However, the design complexity of SPPC is high, and the accuracy and real-time performance of the control algorithm are strict. Traditional pure digital simulation is difficult to fully simulate the complex dynamic process under actual working conditions.

[0026] Based on this, the embodiments of the present application provide a simulation method, device, equipment and medium for a series partial power converter, which connects the series partial power converter to the hardware-in-the-loop circuit built by the real-time simulation platform, and comprehensively verifies the precision and accuracy of the hardware sampling circuit and internal communication circuit of the series partial power converter. It simulates various complex working conditions in a virtual simulation environment, which helps to discover problems in the design or manufacturing process of the series partial power converter, and provides a basis for subsequent optimization and improvement. It is an important means to verify whether the various functions and performances of the series partial power converter device meet the expected design goals.

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0028] An embodiment of the present application relates to a simulation method for a series partial power converter, which is applicable to any electronic device, such as a mobile phone, a computer, a server, etc. A flow chart of a specific simulation method for a series partial power converter is shown in FIG. Figure 1 As shown, the following steps are included:

[0029] Step S11, the real-time simulation machine runs a photovoltaic storage station simulation model, sends the data signal of the photovoltaic storage station to the data acquisition device, and sends the analog signal of the photovoltaic storage station to the power amplifier. The photovoltaic storage station simulation model is used to simulate the real photovoltaic storage station operation system.

[0030] Step S12: the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, and sends the data signal in a unified format to the series partial power converter.

[0031] Step S13: the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter.

[0032] Step S14, the series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator through the data acquisition device for simulation, wherein the command signal includes an active power command and a reactive power command.

[0033] In this way, by constructing a hardware-in-the-loop simulation test method for a series partial power converter, on the one hand, it is possible to fully verify the precision and accuracy of the hardware sampling loop and internal communication loop of the series partial power converter, which is helpful to discover problems existing in the design or manufacturing process of the series partial power converter and provide a basis for subsequent optimization and improvement; on the other hand, various scenarios of the series partial power converter in actual applications are simulated in a simulation environment to test and verify whether the control strategy of the series partial power converter is effective and whether the various functional indicators meet expectations, so as to avoid omissions and deviations that may exist after the equipment is put into operation and cause economic losses.

[0034] In step 11, specifically, a simulation model of a photovoltaic power plant is run on a real-time simulation machine. Figure 2 As shown, it is a structural schematic diagram of the simulation system of the series partial power converter corresponding to the present embodiment. The simulation system of the series partial power converter includes a host computer, a real-time simulation machine, a data acquisition device, a power amplifier and a series partial power converter. A simulation model is built on the host computer, and a light storage station simulation model is constructed. The host computer communicates with the real-time simulation machine through TCP / IP. After the light storage station simulation model is compiled on the host computer, it is downloaded to the real-time simulation machine. The light storage station simulation model includes photovoltaic power generation model, energy storage model, transmission line, load and other components, which are used to simulate the actual light storage station operation system. In the simulation environment, various scenarios of SPPC in actual applications are simulated, and the SPPC control strategy is tested and verified to be effective, and whether the various functional indicators meet expectations. Avoid possible omissions and deviations after the equipment is put into operation, causing economic losses.

[0035] The real-time simulation machine runs the photovoltaic storage station model, and sends the voltage, current, active power and reactive power signals of the photovoltaic storage station grid-connected point to the data acquisition device through the Ethernet interface. The data acquisition device pre-processes the voltage, current, active power and reactive power signals to obtain a data signal in a unified format, and sends it to the series partial power converter through an internal communication method; the voltage and current of the photovoltaic storage station grid-connected point are sent to the power amplifier through the AO channel, and an analog signal is obtained after amplification. The amplified analog signal is sent to the series partial power converter. The series partial power converter calculates the data signal in the unified format and the analog signal to obtain active power and reactive power instructions, and sends the active power and reactive power instructions to the data acquisition device through an internal communication protocol.

[0036] The photovoltaic power station simulation model running on the real-time simulator has a human-computer interaction interface, which can facilitate system configuration, data monitoring and analysis. The modular design concept is adopted to facilitate subsequent functional expansion and upgrading, provide strong support for the design and development of series partial power converters, and accelerate the efficiency of equipment research and development.

[0037] The active power is the part of power consumed in the resistance element in the AC circuit that is irreversibly converted (such as converted into heat energy, light energy or mechanical energy). It reflects the ability of the AC power supply to do work on the resistance element, or the value of electrical energy converted into other energy forms per unit time.

[0038] The reactive power is the power generated by the inductor or capacitor element exchanging power with the AC power source.

[0039] In addition to receiving voltage, current, active power and reactive power signals from the grid-connected point of the photovoltaic and energy storage station in the real-time simulation model, the data acquisition equipment also receives voltage, current, active power and reactive power signals of each sub-array in the photovoltaic station and energy storage station, and sends them to the series partial power converter after processing.

[0040] The power amplifier amplifies the voltage and current signals of the photovoltaic power station grid connection point output by the real-time simulator through the AO analog channel and sends them to the series partial power converter. The voltage and current signals at the grid connection point are sent to the power amplifier through the AO analog channel of the real-time simulator. The power amplifier amplifies the analog signal to [110V 10A] and then sends it to the series partial power converter.

[0041] The present application embodiment takes the test of the power balance control condition of the series partial power converter as an example for explanation, and other conditions are similar. Figure 3 The simulation model of the photovoltaic power station shown in the topology includes energy storage power station 1, energy storage power station 2, photovoltaic power station 1, photovoltaic power station 2, AC power grid and transformer, wherein test point 1 is set at the grid connection point of energy storage power station 1, test point 2 is set at the grid connection point of energy storage power station 2, test point 3 is set at the grid connection point of photovoltaic power station 1, test point 4 is set at the grid connection point of photovoltaic power station 2, and test point 5 is set at the grid connection point of bus common connection point (Point of Common Coupling, PCC). The energy storage power station and photovoltaic power station are respectively connected to the AC power grid through the transformer, and the electric energy of the AC power grid is transmitted to each energy storage power station and photovoltaic power station through the transformer; the energy storage power station includes N parallel energy storage units, wherein N is an integer greater than 1; the photovoltaic power station includes N parallel photovoltaic units, wherein N is an integer greater than 1.

[0042] The photovoltaic power station includes a photovoltaic stand-alone detailed model plus a photovoltaic multiplication model. The energy storage power station consists of a energy storage stand-alone detailed model and an energy storage multiplication model. The grid-connected point current and voltage signals of measurement point 5 are sent to the power amplifier. The voltage, current and power signals of measurement point 1, measurement point 2, photovoltaic power station measurement point 3 and measurement point 4 are sent to the data acquisition device through the TCP protocol. The multiplication model performs a multiplication operation to simulate the total power output of multiple photovoltaic or energy storage units.

[0043] For a single energy storage or photovoltaic power station, it usually includes dozens of units. If all of them are simulated, it will take up a lot of simulation resources. In order to effectively utilize simulation resources to realize real-time simulation of large-scale photovoltaic and energy storage power stations, an equivalent method is adopted in the modeling process, that is, the current output by the detailed photovoltaic and energy storage model of a single stand-alone machine is multiplied to simulate the total power output of multiple photovoltaic and energy storage units. In this example, the multiplication factor is 7, that is, a single machine can achieve the simulation effect of simulating 8 machines after multiplication.

[0044] In the embodiment of the present application, the energy storage and photovoltaic stand-alone machines are simulated using a source code packaging model.

[0045] The multiplication operation is implemented by a multiplication circuit, and the multiplication circuit is as follows: Figure 4 As shown, the first port on the left is used to set the number of photovoltaic or energy storage units, the second port receives the output current of a single unit, and the three controlled current sources A, B, and C on the right are respectively connected in parallel with the A, B, and C phases on the photovoltaic or energy storage outlet side, and the photovoltaic or energy storage power is multiplied by current injection. The circuit includes three modules:

[0046] Unit quantity setting module: Set the number of photovoltaic or energy storage units through the first port to realize the scenario of multiple photovoltaic or energy storage units in parallel.

[0047] Filter circuit module: filters the input current signal.

[0048] Grid-connected control module: controls the controlled current source to be connected to the grid according to instructions.

[0049] The photovoltaic storage station simulation model is built on the host computer to construct the photovoltaic storage station simulation model, including photovoltaic power generation model, energy storage model, transmission line, load and other components. The process of building the photovoltaic storage station simulation model on the host computer is as follows:

[0050] Step S21, encapsulating the photovoltaic and energy storage stand-alone controller source code.

[0051] In one embodiment, the photovoltaic and energy storage stand-alone controller source code may be modified and packaged in MATLAB / Simulink sfunction format.

[0052] Step S22, compile the controller source code to obtain a library file.

[0053] In one embodiment, the source code can be compiled under the Linux system to generate a .o file, and then the .o file is compiled into a .a library file.

[0054] Step S23, configuring the library file into the real-time simulator to achieve integration of the control strategy with the main circuit of a single machine, and generating a photovoltaic and energy storage single machine packaging model.

[0055] In one embodiment, the .a library file is configured in a real-time simulator to realize the integration of the control strategy and the main circuit of a single machine, generate a photovoltaic and energy storage single machine packaging model, and multiply the single machine packaging model to realize the station scale simulation. Finally, the photovoltaic and energy storage station model is downloaded to the real-time simulator through the host computer for operation.

[0056] In one embodiment, the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, including:

[0057] Step S31, collecting the voltage, current, active power and reactive power of the energy storage power station and the photovoltaic power station.

[0058] Step S32, converting the voltage, current, active power and reactive power into data formats respectively to obtain data signals in a unified format.

[0059] In one embodiment, the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter, comprising:

[0060] Step S41, the power amplifier receives the analog signal of the solar storage station through an AI (analog input) interface.

[0061] Step S42, amplifying the analog signal to obtain an amplified analog signal.

[0062] Step S43, sending the amplified analog signal to the series partial power converter.

[0063] The AI ​​interface is used to convert digital values ​​into voltage or current signals within a certain range and output continuously changing signals.

[0064] Specifically, you can Figure 3 The voltage, current, active power and reactive power signals of measuring points 1, 2, 3 and 4 are sent to the data acquisition device through the TCP / IP protocol. After sampling and processing, the data acquisition device sends the data to the series partial power converter through the internal communication protocol after data format conversion.

[0065] In one embodiment, the series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator through a data acquisition device for simulation, including:

[0066] In step S51, the series partial power converter sends the data signal in a unified format and the analog signal to an internal control algorithm program to generate an active power instruction and a reactive power instruction.

[0067] Step S52: sending the active power instruction and the reactive power instruction to the data acquisition device via internal communication.

[0068] Step S53: the data acquisition device sends the active power instruction and reactive power to the simulation model in the real-time simulation machine.

[0069] Step S54, the simulation model in the real-time simulator controls each unit in the energy storage power station and the photovoltaic power station to operate according to the power instruction to balance the power of the entire system.

[0070] In an embodiment of the present invention, a real-time simulator runs a photovoltaic storage station simulation model, sends a data signal of the photovoltaic storage station to a data acquisition device through an Ethernet interface, and sends an analog signal of the photovoltaic storage station to a power amplifier, wherein the photovoltaic storage station simulation model is used to simulate a real photovoltaic storage station operation system; the data acquisition device preprocesses the data signal to obtain a data signal in a unified format, the power amplifier amplifies the analog signal of the photovoltaic storage station, and sends the data signal in a unified format and the amplified analog signal to the series partial power converter; the series partial power converter calculates the data signal in a unified format and the amplified analog signal to obtain an instruction signal, and sends the instruction signal to the real-time simulator through the data acquisition device for simulation, wherein the instruction signal includes an active power instruction and a reactive power instruction, thereby being able to simulate various complex working conditions in a virtual hardware simulation environment, and verify whether the functions and performances of the series partial power converter device meet the expected design goals.

[0071] The steps of the above method are divided only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0072] In addition, the examples mentioned in the above embodiments can be freely combined, and any combination can be understood as an embodiment. The "embodiment" or "example" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0073] An embodiment of the present invention relates to a simulation device 500 for a series partial power converter, wherein a real-time simulator is connected to a data acquisition device and a power amplifier, and the data acquisition device and the power amplifier are connected to the series partial power converter, such as Figure 5 As shown, the device comprises:

[0074] First data acquisition module 501: The real-time simulation machine runs a photovoltaic storage station simulation model, sends the data signal of the photovoltaic storage station to the data acquisition device through the Ethernet interface, and sends the analog signal of the photovoltaic storage station to the power amplifier. The photovoltaic storage station simulation model is used to simulate the real photovoltaic storage station operation system.

[0075] Data processing module 502: The data acquisition device pre-processes the data signal to obtain a data signal in a uniform format, the power amplifier amplifies the amplitude of the analog signal, and sends the data signal in a uniform format and the analog signal to the series partial power converter.

[0076] Second data acquisition module 503: The power amplifier sends the analog signal of the photovoltaic power storage station to the series partial power converter.

[0077] Simulation module 504: The series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator for simulation through a data acquisition device. The command signal includes an active power command and a reactive power command.

[0078] In some embodiments, the photovoltaic power station simulation model includes an energy storage power station, a photovoltaic power station, an AC power grid and a transformer, including: the energy storage power station and the photovoltaic power station are respectively connected to the AC power grid through the transformer; the energy storage power station includes N parallel energy storage units, wherein N is an integer greater than 1; the photovoltaic power station includes N parallel photovoltaic units, wherein N is an integer greater than 1; the current output by a single photovoltaic unit is multiplied to simulate the total power output by multiple photovoltaic units; the current output by a single energy storage unit is multiplied to simulate the total power output by multiple energy storage units.

[0079] In some embodiments, the multiplication operation includes: setting the multiplication number of the photovoltaic single-machine model or the energy storage single-machine model through the first port to realize the scenario of multiple photovoltaic models or energy storage models connected in parallel; filtering the input current signal; and controlling the controlled current source to be connected to the grid according to instructions.

[0080] In some embodiments, the series partial power converter calculates the data signal in a unified format and the analog signal to obtain an instruction signal, and sends the instruction signal to a real-time simulator through a data acquisition device for simulation, including: the series partial power converter sends the data signal in a unified format and the analog signal to an internal control algorithm program to generate an active power instruction and a reactive power instruction; sends the active power instruction and the reactive power instruction to the data acquisition device through an internal communication method; the data acquisition device sends the active power instruction and the reactive power to a simulation model in a real-time simulator; the simulation model in the real-time simulator controls each unit in the energy storage power station and the photovoltaic power station to operate according to the power instruction to balance the power of the entire system.

[0081] It is not difficult to find that this embodiment is a device embodiment corresponding to the above method embodiment, and this embodiment can be implemented in conjunction with the above method embodiment. The relevant technical details mentioned in the above method embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the above method embodiment.

[0082] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0083] Another embodiment of the present invention relates to an electronic device, such as Figure 6 As shown, it includes: at least one processor 601; and a memory 602 that is communicatively connected to the at least one processor 601; wherein the memory stores instructions that can be executed by the at least one processor 601, and the instructions are executed by the at least one processor 601 so that the at least one processor 601 can execute the above-mentioned simulation method of the series partial power converter.

[0084] The memory 602 and the processor 601 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 601 and the memory 602 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 601 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 601.

[0085] The processor 601 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 602 can be used to store data used by the processor when performing operations.

[0086] Another embodiment of the present application provides a computer-readable storage medium, which stores programs or instructions. When the program or instructions are executed by a processor, the various processes of an embodiment of a simulation method for a series partial power converter such as any of the above-mentioned items are implemented, and the same technical effect can be achieved. To avoid repetition, they will not be repeated here.

[0087] Computer readable media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0088] Another embodiment of the present application further provides a computer program product, including computer instructions, which, when executed by a processor, implement the above Figure 1The various processes of the simulation method embodiment of any one of the series partial power converters shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0089] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0090] It should be noted that the collection, collection, updating, analysis, processing, use, transmission, storage and other aspects of user personal information involved in the technical solution of this disclosure are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. Necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information and network security.

[0091] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0092] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a service classification device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0093] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A simulation method for a series partial power converter, characterized in that: The real-time simulator is connected to a data acquisition device and a power amplifier, and the data acquisition device and the power amplifier are connected to the series partial power converter; the method comprises: The real-time simulation machine runs a simulation model of a photovoltaic storage station, sends a data signal of the photovoltaic storage station to a data acquisition device through an Ethernet interface, and sends an analog signal of the photovoltaic storage station to a power amplifier. The simulation model of the photovoltaic storage station is used to simulate a real photovoltaic storage station operation system; The data acquisition device pre-processes the data signal to obtain a data signal in a unified format, and sends the data signal in the unified format to the series partial power converter; The power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter; The series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator for simulation through the data acquisition device. The command signal includes an active power command and a reactive power command.

2. The simulation method of a series partial power converter according to claim 1, characterized in that: The photovoltaic power station simulation model includes an energy storage power station, a photovoltaic power station, an AC power grid and a transformer, including: The energy storage power station and the photovoltaic power station are respectively connected to the AC power grid through the transformer; The energy storage power station includes N parallel energy storage units, where N is an integer greater than 1; The photovoltaic power station comprises N photovoltaic units connected in parallel, wherein N is an integer greater than 1; The current output by a single photovoltaic unit is multiplied to simulate the total power output by multiple photovoltaic units; The current output by a single energy storage unit is multiplied to simulate the total power output by multiple energy storage units.

3. The simulation method of a series partial power converter according to claim 2, characterized in that: The multiplication operation includes: The multiplication number of the photovoltaic single machine model or the energy storage single machine model is set through the first port to realize the scenario of multiple photovoltaic multiplication models or energy storage multiplication models connected in parallel; Filter the input current signal; The controlled current source is connected to the grid according to the command.

4. The simulation method of a series partial power converter according to claim 1, characterized in that: The solar-storage station simulation model is built on the host computer, including: Encapsulate photovoltaic and energy storage stand-alone controller source code; Compile the controller source code to obtain a library file; The library file is configured in the real-time simulator to achieve integration of control strategy and stand-alone main circuit, and generate a photovoltaic and energy storage stand-alone packaging model.

5. The simulation method of a series partial power converter according to claim 2, characterized in that: The data acquisition device preprocesses the data signal to obtain a data signal in a unified format, including: Collecting the voltage, current, active power and reactive power of the energy storage power station and the photovoltaic power station; The voltage, current, active power and reactive power are respectively converted into data formats to obtain data signals in a unified format.

6. The simulation method of a series partial power converter according to claim 1, characterized in that: The power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter, including: The power amplifier receives the analog signal of the optical storage station through the AI ​​interface; After amplifying the analog signal, an amplified analog signal is obtained; The amplified analog signal is sent to the series partial power converter.

7. The simulation method of a series partial power converter according to claim 1, characterized in that: The series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator through a data acquisition device for simulation, including: The series partial power converter sends the data signal in the unified format and the analog signal to an internal control algorithm program to generate an active power instruction and a reactive power instruction; Sending the active power instruction and the reactive power instruction to the data acquisition device through an internal communication method; The data acquisition device sends the active power instruction and reactive power to the simulation model in the real-time simulator; The simulation model in the real-time simulator controls each unit in the energy storage power station and the photovoltaic power station to operate according to the power instruction to balance the power of the entire system.

8. A simulation device for a series partial power converter, characterized in that: The real-time simulator is connected to a data acquisition device and a power amplifier, and the data acquisition device and the power amplifier are connected to the series partial power converter; the device comprises: First data acquisition module: the real-time simulation machine runs a simulation model of a photovoltaic storage station, sends the data signal of the photovoltaic storage station to the data acquisition device through the Ethernet interface, and sends the analog signal of the photovoltaic storage station to the power amplifier. The simulation model of the photovoltaic storage station is used to simulate the real photovoltaic storage station operation system; Data processing module: the data acquisition device pre-processes the data signal to obtain a data signal in a unified format, and sends the data signal in the unified format to the series partial power converter; Second data acquisition module: the power amplifier sends the analog signal of the photovoltaic storage station to the series partial power converter; Simulation module: The series partial power converter calculates the data signal in the unified format and the analog signal to obtain a command signal, and sends the command signal to a real-time simulator through a data acquisition device for simulation. The command signal includes an active power command and a reactive power command.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform the method as claimed in any one of claims 1 to 7.

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