Optical storage DC flexible power distribution system and regulation and control method thereof

Abstract

The invention provides an optical storage DC flexible power distribution system and a regulation and control method thereof, and the system comprises a plurality of transformer area systems carried in a plurality of transformer area energy stations and a plurality of household subsystems carried in a plurality of household energy walls. The transformer area system comprises a static change-over switch, an isolation transformer, a bidirectional energy converter and the like. The transformer area system takes power from a power grid and supplies the power to a direct-current bus. The household subsystem comprises a photovoltaic module, an energy storage module, a charging pile, a direct-current load, an alternating-current load and an energy management system controller, and the household subsystem is connected to the direct-current bus; the plurality of transformer area systems are connected to the lower end of the static change-over switch, and the plurality of household subsystems are connected through a direct current bus. According to the optical storage direct flexible power distribution system provided by the embodiment of the invention, interaction between a power grid and a transformer area, between transformer areas, between transformer areas and users and between users can be perfectly adapted, multiple transformer areas are combined into a whole, the electric energy dispatching capability is improved, and work such as peak load shifting and response to a virtual power plant can be better realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a photovoltaic energy storage direct current flexible power distribution system and a control method thereof. Background Art

[0002] As an important part of the new power system, the photovoltaic storage direct current flexible technology is a new direction for building energy conservation. The technology integrates four key elements: photovoltaic power generation, energy storage, direct current distribution and flexible power consumption. It aims to improve the efficiency of power utilization, realize zero-carbon power based on renewable energy, and reduce peak loads to relieve grid pressure.

[0003] However, the connection between the photovoltaic storage direct and flexible system and the power grid is mostly based on individual buildings or household units, and there is a lack of interaction between different small-unit photovoltaic storage direct and flexible systems. When connecting with the power grid to respond to grid tasks, the system needs to have characteristics such as large capacity, strong system stability, and fast response. This makes it difficult for a large number of small-scale photovoltaic storage direct and flexible systems to interact well with the power grid. From the perspective of energy utilization, in small-scale systems, the load scale is not large, making its photovoltaic absorption rate and energy storage utilization rate not as good as the large-scale system of the substation microgrid. Therefore, there is an urgent need for a photovoltaic storage direct and flexible distribution system that combines substations and households. Summary of the invention

[0004] In order to solve the existing technical problems, an embodiment of the present invention provides a photovoltaic energy storage direct current flexible distribution system and a control method thereof.

[0005] In the first aspect, an embodiment of the present invention provides a photovoltaic storage direct current flexible distribution system, including: multiple substation systems installed in multiple substation energy stations and multiple household subsystems installed in multiple household energy walls; the substation system includes at least: a static transfer switch, an isolation transformer and a bidirectional energy converter, and the substation system draws power from the power grid to supply a DC bus; the household subsystem includes at least: photovoltaic components, energy storage modules, charging piles, DC loads, AC loads and an energy management system controller, and the household subsystem is connected to the DC bus; multiple substation systems are connected to the lower end of the static transfer switch, and multiple household subsystems are connected through the DC bus.

[0006] Optionally, the substation system supplies the DC bus through the static transfer switch, the isolation transformer and the bidirectional energy converter; or, the substation system also includes: other loads, which are connected to the DC bus through the bidirectional energy converter.

[0007] Optionally, the household subsystem also includes: a photovoltaic combiner box, a chopper, an inverter and an automatic transfer switch; the photovoltaic components are combined to the photovoltaic combiner box and maintain maximum power output to the DC bus through the photovoltaic converter; the energy storage module is connected to the DC bus through the energy storage inverter; the charging pile is connected to the DC bus through the DC-DC bidirectional converter; the lower end of the inverter is connected to the automatic transfer switch and connected to the AC bus.

[0008] Optionally, the energy management system controller includes: a broadcast addressing module, a re-addressing module and an address code allocation module; the broadcast addressing module is used to perform broadcast active addressing operations on each device after the system is started; the re-addressing module is used to re-address when an abnormality or timeout occurs in the response of each device to the message sent back by the energy management system controller, until each device is successfully connected; the address code allocation module is used to allocate corresponding address codes to each device to identify the number and type of connected devices.

[0009] Optionally, the communication method between the energy management system controllers at the same level adopts a host election mode.

[0010] Optionally, the energy management system controller also includes: a sentinel process.

[0011] In the second aspect, an embodiment of the present invention further provides a control method, which is applicable to any one of the photovoltaic energy storage direct flexible distribution systems as described above, including: an operation scheduling mode of a substation energy station and an operation scheduling mode of a household energy wall.

[0012] In a third aspect, an embodiment of the present invention provides an electronic device, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory, and when the computer program is executed by the processor, the control method described in the second aspect is implemented.

[0013] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the control method described in the second aspect above.

[0014] In a fifth aspect, the present application also provides a computer program product, including a computer program, which, when executed, can implement the control method described in the second aspect above.

[0015] The photovoltaic storage direct flexible distribution system provided in the above-mentioned first aspect of the embodiment of the present invention is an electrical system that can combine substations with households, can perfectly adapt to the interaction between the power grid and substations, substations and substations, substations and households, and households and households, and can combine multiple substations into a whole. The power dispatching capability is greatly improved, and tasks such as peak shaving and valley filling and response to virtual power plants can be better achieved.

[0016] The control method provided in the second aspect of the embodiment of the present invention adopts voltage classification and system classification strategies, so that the system supports off-grid mode and can be used as disaster recovery standby; the multi-host switching mode can ensure that the remaining systems can still operate normally when individual systems fail; green electricity is used more efficiently, and excess photovoltaic power can be supplied to different household systems and substation systems, thereby improving the photovoltaic absorption rate; multiple substations can also be combined into a whole, greatly improving the power dispatching capability, and better realizing peak shaving and valley filling and responding to virtual power plants and other tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

[0018] Figure 1 A schematic diagram of the architecture of a photovoltaic storage direct-current flexible power distribution system provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram of the control flow of the energy management system controller and the equipment docking in the photovoltaic storage direct flexible power distribution system provided by an embodiment of the present invention is shown; Figure 3 A schematic diagram showing a communication method between energy management system controllers at the same level in a photovoltaic storage direct current flexible power distribution system provided by an embodiment of the present invention; Figure 4 A schematic diagram of the communication process in the operation scheduling mode of the energy station in the substation area in the control method provided by the embodiment of the present invention is shown; Figure 5 A schematic diagram of the communication process in the operation scheduling mode of the household energy wall in the control method provided by the embodiment of the present invention is shown; Figure 6 A schematic structural diagram of an electronic device for executing a control method provided by an embodiment of the present invention is shown.

[0019] Reference numerals: 1-substation system, 2-household subsystem, 11-static transfer switch, 12-isolation transformer, 13-bidirectional energy converter, 21-photovoltaic module, 22-energy storage module, 23-charging pile, 24-DC load, 25-AC load, 26-energy management system controller, 27-photovoltaic junction box, 28a-photovoltaic converter, 28b-energy storage converter, 28c-DC-DC bidirectional converter, 29-inverter, 20-automatic transfer switch. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Figure 1 FIG. 1 shows a schematic diagram of the architecture of a photovoltaic storage direct current flexible power distribution system provided by an embodiment of the present invention. Figure 1 As shown, Figure 1 It includes multiple substation energy stations, such as substation energy station #1, substation energy station #2, etc. A substation energy station can include multiple household energy walls, such as substation energy station #1 can include #1 household energy wall, #2 household energy wall, #3 household energy wall... Substation energy station #2 can include #1 household energy wall, #2 household energy wall, #3 household energy wall... In the photovoltaic storage direct current flexible power distribution system provided in the embodiment of the present invention, it includes multiple substation systems 1 installed in multiple substation energy stations, multiple household subsystems 2 installed in multiple household energy walls, and a DC bus. That is to say, each substation energy station is equipped with a corresponding substation system 1, and each household energy wall is equipped with a corresponding household subsystem 2. From Figure 1 It is not difficult to see that the household energy walls belonging to the same energy station in the substation are connected to the substation through a DC bus, where the voltage of the DC bus is 375V.

[0022] Specifically, the substation system 1 installed in the substation energy station includes at least: a static transfer switch 11, an isolation transformer 12 and a bidirectional energy converter 13. The substation system 1 takes power from the power grid to supply the DC bus. The static transfer switch 11 is an STS (Static Transfer Switch) switch, and the bidirectional energy converter 13 is a bidirectional AC / DC (alternating current / direct current) converter with an AC / DC voltage of 380V / 375V; see Figure 1 As shown, Figure 1 The lower left corner shows the power grid, and the substation system 1 can draw power from the power grid to supply the DC bus. It should be noted that the substation system 1 does not draw power from the power grid all the time.

[0023] In addition, the household subsystem 2 installed in the household energy wall includes at least: photovoltaic components 21, energy storage modules 22, charging piles 23, DC loads 24, AC loads 25 and energy management system controllers 26. The output of the household subsystem 2 is connected to the DC bus. Among them, the energy storage module 22 can be a lead-carbon battery or a lithium battery. The charging pile 23 is used to charge electric vehicles. It is a V2G (Vehicle-to-Grid) charging pile that can support bidirectional charging and discharging. The DC load 24 is an indoor DC load, sharing a DC bus that converts 375V to 48V, that is, the voltage is 48V. The AC load 25 is an indoor AC load, and the AC load 25 shares an AC bus that converts DC to AC, with a voltage of 220V. The energy management system controller 26 is an EMS (Energy Management System) controller.

[0024] In the embodiment of the present invention, multiple substation systems 1 are connected to the lower end of the static transfer switch 11, that is, the connection points of multiple substation systems 1 are located at the lower end of the static transfer switch 11, to prevent uneven power consumption in each substation from causing reverse current to disrupt the power quality of the power grid. Multiple household subsystems 2 are connected through a DC bus, that is, the energy walls between households are connected through a DC bus.

[0025] The photovoltaic storage direct flexible distribution system provided in the embodiment of the present invention is an electrical system that can combine substations with households. It can perfectly adapt to the interaction between the power grid and substations, substations and substations, substations and households, and households and households, and combine multiple substations into a whole. The power dispatching capability is greatly improved, and tasks such as peak shaving and valley filling and response to virtual power plants can be better achieved.

[0026] Alternatively, if Figure 1 As shown, the substation system 1 supplies the DC bus through the static transfer switch 11, the isolation transformer 12 and the bidirectional energy converter 13. Among them, the anti-backflow meter can also be set at the upper end of the mutual transmission node of the substation system. The anti-backflow meter has the function of monitoring and detecting whether the substation system 1 secretly "leaks" to the power grid when the host is prohibited. If so, the inverter (ACDC converter) is notified to adjust and cut off the reverse current. In addition, the substation system 1 also has a module expansion function. Energy storage, DC charging piles, photovoltaic and other modules can be added to the substation system, added to the lower end of the bidirectional energy converter 13, and directly connected to the DC bus.

[0027] Alternatively, if Figure 1 As shown, the household subsystem 2 may further include: a photovoltaic combiner box 27 , a photovoltaic converter 28 a , an energy storage converter 28 b , a DC-DC bidirectional converter 28 c , an inverter 29 and an automatic transfer switch 20 .

[0028] Among them, the photovoltaic converter 28a is a DC / DC (direct current / direct current) converter, and the photovoltaic components 21 are converged to the photovoltaic junction box 27 and maintain the maximum power output to the 375V DC bus through the photovoltaic converter 28a (DC / DC converter). The energy storage module 22 is connected to the DC bus through the energy storage inverter 28b (DC / DC converter), which can support power supply from the DC bus and power supply to the DC bus. The V2G charging pile 23 is connected to the DC bus through the DC-DC bidirectional converter 28c (DC / DC converter), which supports electric vehicles to supply power to the microgrid. The inverter 29 is a DC / AC (direct current / alternating current) inverter, and the automatic transfer switch 20 is an ATS (Automatic Transfer Switching, automatic transfer switch, commonly known as dual power supply) bidirectional converter. The lower end of the inverter 29 is connected to the automatic transfer switch 20 and is connected to the AC bus, such as Figure 1 As shown, the second circuit (such as the circuit pointed by the horizontal pin) of the automatic transfer switch 20 is connected to the local 220V AC bus. This step is to ensure that high-power or high-power-consuming equipment can operate without power outages.

[0029] Optionally, the energy management system controller 26 includes: a broadcast addressing module, a re-addressing module and an address code allocation module. Among them, the broadcast addressing module is used to perform broadcast-style active addressing operations on each device after the system is started. The re-addressing module is used to re-address when an abnormality or timeout occurs in the response of each device to the message sent back by the energy management system controller 26, until each device is successfully connected. It can be understood that after the energy management system controller 26 (EMS controller) performs a broadcast-style active addressing operation, each device will respond to the EMS return message. If an abnormality or timeout occurs, the EMS will re-address until all devices are successfully connected, and communication between the device and the EMS is established. Furthermore, the address code allocation module is used to assign corresponding address codes to each device to identify the number and type of connected devices. That is to say, after establishing the communication between the device and the energy management system controller 26, the EMS will assign an address code to each type of device (such as photovoltaic DC / DC, energy storage DC / DC, etc.) to identify the number and type of devices connected to the EMS. This allows plug-and-play of devices and supports dynamic expansion of devices such as photovoltaic energy storage loads and dynamic expansion of projects. For example, for each device of each type, assuming that the photovoltaic DC / DC converter uses 0x101~0x150, and the energy storage device DC / DC uses 0x201~0x250, the prefix indicates the device type, and the following indicates the number of the machine. Figure 2 As shown, Figure 2 A schematic diagram of the control flow of the energy management system controller 26 (EMS controller) connecting with the equipment is shown.

[0030] Alternatively, if Figure 3 As shown, Figure 3 A schematic diagram of the communication mode between energy management system controllers 26 (EMS) of the same level is shown. In an embodiment of the present invention, the communication mode between energy management system controllers 26 of the same level adopts a host election mode. That is, an energy management system controller 26 acts as a host to issue scheduling instructions to the slave. Further, the energy management system controller 26 also includes: a sentinel process. That is, there is also an independent process in the energy management system controller 26 - the sentinel process. The sentinel runs independently of the energy management system controller 26 program, and it detects the status of all devices by broadcasting instructions to all energy management system controllers 26 regularly and checking whether each energy management system controller 26 has a reply message. When multiple sentinels do not receive a reply from the host, a failover operation will be performed, and other energy management system controllers 26 will be selected as the host system. After the selection, other devices and sentinel modes will be broadcast, so that each sentinel can switch the host to the server it monitors. The multi-host switching mode can ensure that the remaining systems can still operate normally when individual systems fail.

[0031] An embodiment of the present invention also provides a control method, which is applicable to any one of the photovoltaic energy storage direct flexible distribution systems as described above, including: an operation scheduling mode of a substation energy station and an operation scheduling mode of a household energy wall.

[0032] Specifically, see Figure 4 As shown, Figure 4 The communication flow diagram under the operation and scheduling mode of the energy station in the substation is shown. The operation and scheduling mode of the energy station in the substation includes: first, after the substation energy station is started, it will handshake with the household energy wall under the substation energy station system, obtain the consumption of the slave energy wall, and uniformly summarize it to the energy station for statistical scheduling, so as to continuously cycle. At the same time, the substation energy station will handshake with other substation energy stations; if the candidate entity is the host, the energy consumption of this energy station will be summarized, the energy consumption of the slave energy station will be obtained, so as to perform energy station-level energy scheduling, and send instructions to the household energy wall. If it is not the host, it will determine whether it has a host. If it has a host, it will summarize the device information and obey the host energy station scheduling as a slave device; if there is no host, it will try to run for election. If successful, it will perform the duties of the host. If it fails, it will control the household energy wall as an independent system; when there is a sudden disconnection with the host, it will also control the household energy wall as an independent system.

[0033] In addition, see Figure 5 As shown, Figure 5The schematic diagram of the communication process in the operation and scheduling mode of the household energy wall is shown. The operation and scheduling mode of the household energy wall includes: first, the household energy wall performs a handshake operation with the master station device (energy station). If successful, it will act as a slave to listen to the host heartbeat, calculate the energy consumption status of the local energy wall and output it to the host device, and then wait for the host command and run the host command; if the host heartbeat is not detected, the consumption status of the local energy wall will be calculated, and it will become an independent system for energy scheduling. If the handshake with the master station (energy station) fails from the beginning, other energy walls in the local area network will be broadcasted to determine whether they are the host; if the local machine is the host, it will perform the host's duties-control the household energy walls under the same area system; if not, it will broadcast all energy walls to start the host election process; if it succeeds in the host election process, it will perform the host's duties-control the household energy walls under the same area system, and if it fails, it will perform information collection and response services. If there is a situation with the host energy wall, it will run as an independent system.

[0034] Under the dispatching control of this regulation method, the system will dynamically switch the power supply to ensure the stability of the bus voltage. For example, in the self-operating mode of the energy station, the AC / DC (alternating current / direct current) converter in the substation energy station will maintain a constant voltage mode to stabilize the DC bus voltage, the photovoltaic power station will maintain the maximum power output mode, and the energy storage will be in a constant power output mode according to demand. When a substation energy station receives a request from the host to supply power to other energy stations or the power grid, the AC / DC (alternating current / direct current) converter of the substation energy station will switch to a constant power mode, and the energy storage DC / DC (direct current / direct current) of several household energy walls with preset address codes will become a constant voltage mode to maintain the stability of the bus voltage.

[0035] The control method provided in the embodiment of the present invention adopts voltage classification and system classification strategies, so that the system supports off-grid mode and can be used as a disaster recovery standby; the multi-host switching mode can ensure that the remaining systems can still operate normally when individual systems fail; green electricity is used more efficiently, and excess photovoltaic power can be supplied to different household systems and substation systems, thereby improving the photovoltaic absorption rate; multiple substations can also be combined into a whole, greatly improving the power dispatching capability, and better realizing peak shaving and valley filling and responding to virtual power plants and other tasks.

[0036] According to one aspect of the present application, an embodiment of the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program comprising a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part. When the computer program is executed by a processor, the control method provided by the embodiment of the present application is executed.

[0037] In addition, an embodiment of the present invention further provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor. The transceiver, the memory, and the processor are respectively connected via a bus. When the computer program is executed by the processor, each process of the above-mentioned control method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0038] For details, see Figure 6 As shown, the electronic device includes a bus 1110 , a processor 1120 , a transceiver 1130 , a bus interface 1140 , a memory 1150 , and a user interface 1160 .

[0039] In the embodiment of the present invention, the electronic device further includes: a computer program stored in the memory 1150 and executable on the processor 1120, and when the computer program is executed by the processor 1120, each process of the above-mentioned control method embodiment is implemented.

[0040] The transceiver 1130 is configured to receive and send data under the control of the processor 1120 .

[0041] In an embodiment of the present invention, a bus architecture (represented by bus 1110 ) may include any number of interconnected buses and bridges, and bus 1110 connects various circuits including one or more processors represented by processor 1120 and a memory represented by memory 1150 .

[0042] Bus 1110 represents one or more of any of several types of bus structures, including a memory bus and memory controller, a peripheral bus, an Accelerate Graphical Port (AGP), a processor, or a local bus using any of a variety of bus architectures. By way of example and not limitation, such architectures include: Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, Enhanced ISA (EISA) bus, Video Electronics Standards Association (VESA), Peripheral Component Interconnect (PCI) bus.

[0043] The processor 1120 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment may be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processors include: a general processor, a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a complex programmable logic device (CPLD), a programmable logic array (PLA), a microcontroller unit (MCU) or other programmable logic devices, discrete gates, transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. For example, the processor may be a single-core processor or a multi-core processor, and the processor may be integrated into a single chip or located on multiple different chips.

[0044] Processor 1120 can be a microprocessor or any conventional processor. The method steps disclosed in the embodiment of the present invention can be directly executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a readable storage medium known in the art, such as a random access memory (RAM), a flash memory (FlashMemory), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a register, etc. The readable storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0045] The bus 1110 may also connect various other circuits such as peripheral devices, voltage regulators or power management circuits, and the bus interface 1140 provides an interface between the bus 1110 and the transceiver 1130, which are well known in the art. Therefore, the embodiments of the present invention will not be further described.

[0046] The transceiver 1130 may be one element or multiple elements, such as multiple receivers and transmitters, and provides a unit for communicating with various other devices on a transmission medium. For example, the transceiver 1130 receives external data from other devices, and the transceiver 1130 is used to send data processed by the processor 1120 to other devices. Depending on the nature of the computer system, a user interface 1160 may also be provided, such as a touch screen, a physical keyboard, a display, a mouse, a speaker, a microphone, a trackball, a joystick, and a stylus.

[0047] It should be understood that in an embodiment of the present invention, the memory 1150 may further include a memory remotely arranged relative to the processor 1120, and these remotely arranged memories may be connected to the server through a network. One or more parts of the above-mentioned network may be an ad hoc network, an intranet, an extranet, a virtual private network (VPN), a local area network (LAN), a wireless local area network (WLAN), a wide area network (WAN), a wireless wide area network (WWAN), a metropolitan area network (MAN), the Internet, a public switched telephone network (PSTN), a plain old telephone service network (POTS), a cellular telephone network, a wireless network, a wireless fidelity (Wi-Fi) network, and a combination of two or more of the above-mentioned networks. For example, the cellular telephone network and the wireless network can be a Global System for Mobile Communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Worldwide Interoperability for Microwave Access (WiMAX) system, a General Packet Radio Service (GPRS) system, a Wideband Code Division Multiple Access (WCDMA) system, a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, an Advanced Long Term Evolution (LTE-A) system, a Universal Mobile Telecommunications (UMTS) system, an Enhanced Mobile Broadband (eMBB) system, a Massive Machine Type of Communication (mMTC) system, an Ultra Reliable Low Latency Communications (uRLLC) system, etc.

[0048] It should be understood that the memory 1150 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory includes: a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.

[0049] Volatile memory includes: Random Access Memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as: Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM) and Direct Rambus RAM (DRRAM). The memory 1150 of the electronic device described in the embodiment of the present invention includes but is not limited to the above and any other suitable types of memory.

[0050] In the embodiment of the present invention, the memory 1150 stores the following elements of the operating system 1151 and the application program 1152: executable modules, data structures, or subsets thereof, or extended sets thereof.

[0051] Specifically, the operating system 1151 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 1152 includes various applications, such as a media player (Media Player) and a browser (Browser), which are used to implement various application services. The program for implementing the method of the embodiment of the present invention may be included in the application 1152. The application 1152 includes applets, objects, components, logic, data structures, and other computer system executable instructions that perform specific tasks or implement specific abstract data types.

[0052] In addition, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned control method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0053] Computer readable storage media include: permanent and non-permanent, removable and non-removable media, which are tangible devices that can retain and store instructions for use by instruction execution devices. Computer readable storage media include: electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, and any suitable combination of the above. Computer readable storage media include: 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), non-volatile random access memory (NVRAM), 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 cassette storage, magnetic tape disk storage or other magnetic storage devices, memory sticks, mechanical encoding devices (such as punched cards or raised structures in grooves with instructions recorded thereon) or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined in the embodiments of the present invention, computer-readable storage media do not include temporary signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (such as light pulses passing through fiber optic cables), or electrical signals transmitted through wires.

[0054] In the several embodiments provided in the present application, it should be understood that the disclosed devices, electronic devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0055] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one location or distributed on multiple network units. Some or all of the units may be selected according to actual needs to solve the problem to be solved by the embodiments of the present invention.

[0056] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0057] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (including: a personal computer, a server, a data center or other network equipment) to perform all or part of the steps of the method described in each embodiment of the present invention. The above-mentioned storage medium includes various media that can store program codes as listed above.

[0058] In the description of the embodiments of the present invention, those skilled in the art should know that the embodiments of the present invention can be implemented as methods, devices, electronic devices and computer-readable storage media. Therefore, the embodiments of the present invention can be specifically implemented in the following forms: complete hardware, complete software (including firmware, resident software, microcode, etc.), a combination of hardware and software. In addition, in some embodiments, the embodiments of the present invention can also be implemented in the form of a computer program product in one or more computer-readable storage media, and the computer-readable storage medium contains computer program code.

[0059] The above-mentioned computer-readable storage medium may adopt any combination of one or more computer-readable storage media. Computer-readable storage media include: electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or devices, or any combination of the above. More specific examples of computer-readable storage media include: portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM), flash memories, optical fibers, compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices or any combination of the above. In an embodiment of the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device, or device.

[0060] The computer program code contained in the above-mentioned computer-readable storage medium can be transmitted by any appropriate medium, including: wireless, wire, optical cable, radio frequency (RF) or any suitable combination thereof.

[0061] The computer program code for performing the operation of the embodiment of the present invention can be written in assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, integrated circuit configuration data, or in one or more programming languages ​​or a combination thereof, wherein the programming language includes an object-oriented programming language, such as Java, Smalltalk, C++, and also includes a conventional procedural programming language, such as C language or a similar programming language. The computer program code can be executed completely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer, partially on a remote computer, and completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer or to an external computer through any type of network, including a local area network (LAN) or a wide area network (WAN).

[0062] The embodiments of the present invention describe the provided methods, devices, and electronic devices through flowcharts and / or block diagrams.

[0063] It should be understood that each box in the flowchart and / or block diagram and the combination of boxes in the flowchart and / or block diagram can be implemented by computer-readable program instructions. These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine, and these computer-readable program instructions are executed by a computer or other programmable data processing device to produce a device that implements the functions / operations specified by the boxes in the flowchart and / or block diagram.

[0064] These computer-readable program instructions may also be stored in a computer-readable storage medium that enables a computer or other programmable data processing device to work in a specific manner. In this way, the instructions stored in the computer-readable storage medium produce an instruction device product including functions / operations specified in the blocks in the flowchart and / or block diagram.

[0065] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device, so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby enabling the instructions executed on the computer or other programmable data processing apparatus to provide a process for implementing the functions / operations specified in the blocks in the flowchart and / or block diagram.

[0066] The above is only a specific implementation of the embodiment of the present invention, but the protection scope of the embodiment of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiment of the present invention should be included in the protection scope of the embodiment of the present invention. Therefore, the protection scope of the embodiment of the present invention shall be based on the protection scope of the claims.

Claims

1. A photovoltaic energy storage direct flexible power distribution system, characterized in that: include: A plurality of substation systems (1) installed in a plurality of substation energy stations and a plurality of household subsystems (2) installed in a plurality of household energy walls; The substation system (1) comprises at least: a static transfer switch (11), an isolation transformer (12) and a bidirectional energy converter (13); the substation system (1) takes power from a power grid and supplies it to a DC bus; The household subsystem (2) comprises at least: a photovoltaic module (21), an energy storage module (22), a charging pile (23), a DC load (24), an AC load (25) and an energy management system controller (26); the household subsystem (2) is connected to the DC bus; The plurality of substation systems (1) are connected to the lower end of the static transfer switch (11), and the plurality of household subsystems (2) are connected via the DC bus.

2. The photovoltaic energy storage direct-current flexible power distribution system according to claim 1 is characterized in that: The substation system (1) supplies the DC bus through the static transfer switch (11), the isolation transformer (12) and the bidirectional energy converter (13); or, the substation system (1) further includes: other loads, which are connected to the DC bus through the bidirectional energy converter (13).

3. The photovoltaic energy storage direct-current flexible power distribution system according to claim 1 is characterized in that: The household subsystem (2) further comprises: a photovoltaic combiner box (27), a photovoltaic converter (28a), an energy storage converter (28b), a DC-DC bidirectional converter (28c), an inverter (29), and an automatic transfer switch (20); The photovoltaic components (21) are combined into the photovoltaic combiner box (27) and output to the DC bus at maximum power through the photovoltaic converter (28a); the energy storage module (22) is connected to the DC bus through the energy storage converter (28b); the charging pile (23) is connected to the DC bus through the DC-DC bidirectional converter (28c); the lower end of the inverter (29) is connected to the automatic transfer switch (20) and connected to the AC bus.

4. The photovoltaic energy storage direct-flexible power distribution system according to claim 1 is characterized in that: The energy management system controller (26) comprises: a broadcast addressing module, a re-addressing module and an address code allocation module; The broadcast addressing module is used to perform broadcast active addressing operations on each device after the system is started; The re-addressing module is used to re-address when an abnormality or timeout occurs in the response of each device to the message sent back by the energy management system controller (26) until each device is successfully connected; The address code allocation module is used to allocate corresponding address codes to each device to identify the number and type of connected devices.

5. The photovoltaic energy storage direct-current flexible power distribution system according to claim 1 is characterized in that: The communication method between the energy management system controllers (26) of the same level adopts the host election mode.

6. The photovoltaic energy storage direct-current flexible power distribution system according to claim 5 is characterized in that: The energy management system controller (26) further includes: a sentinel process.

7. A control method, which is applicable to any one of the photovoltaic energy storage direct current flexible power distribution systems in claims 1-6, characterized in that: include: The operation and dispatching modes of the substation energy station and the operation and dispatching modes of the household energy wall.

8. An electronic device comprising a processor and a memory, wherein the memory stores a computer program, characterized in that: The processor executes the computer program stored in the memory to implement the control method according to claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method according to claim 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed, the control method according to claim 7 is implemented.

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