Distributed energy storage photovoltaic panel integrated device ESP applied to direct current power distribution system

Abstract

The invention discloses a distributed energy storage photovoltaic panel integrated device ESP applied to a direct current power distribution system, and belongs to the field of energy supply, and the technical scheme is characterized in that the distributed energy storage photovoltaic panel integrated device ESP comprises an energy storage unit module which is used for storing energy, assisting a direct current power distribution control unit module to carry out coordinated energy supply, and supplying direct current to a local function unit; the photovoltaic unit module is used for supplying direct current to the local function unit and the energy storage unit module; the direct-current power distribution control protection unit module is used for coordinating and protecting energy supply conditions among the energy storage unit module, the photovoltaic unit module and the local function unit module; the local function unit module is used for supporting local application of direct-current power distribution; according to the application, the integrated modular design and comprehensive control protection of the energy storage device and the photovoltaic device applied to the direct current power distribution system are realized, the modular application scene is expanded, the system architecture and function positioning in the traditional application are broken through, and the large-scale application effect of the terminal direct current power distribution system can be realized.

Description

Technical Field

[0001] The present application relates to the field of energy supply, and more specifically to a distributed energy storage photovoltaic panel integrated device ESP applied to a direct current distribution system. Background Art

[0002] The new power system is the main body of my country's energy system dominated by new energy in the future. It will fundamentally change the current development pattern dominated by fossil energy. It has low-carbon, clean, efficient and safe as its basic characteristics, and is supported by a high proportion of renewable energy and electrification, new energy storage, hydrogen energy, distributed energy, smart grids, advanced transmission and power generation technologies, digital technologies and new business models, flexible electricity markets, etc. It is an important solution to achieve high-quality economic and social development and respond to climate change, and is the foundation for building an energy power.

[0003] In the new power system, "source-grid-load-storage" and "solar-storage-direct-flexible" are important technical supports, and their technical basis is the DC distribution system. At present, the DC distribution system is relatively lacking in technical reserves, application products and solutions, and application experience, which is mainly reflected in the following aspects:

[0004] 1. The DC power distribution system is a new technology. The lack of application experience has resulted in a complex and diverse application architecture for the DC power distribution system. In particular, energy storage and photovoltaic equipment are still using the traditional AC system solution.

[0005] 2. Photovoltaic power generation equipment and systems can only be connected to the end user's AC power distribution system through inverter equipment, and cannot meet the needs of new power system terminal applications;

[0006] 3. The energy storage equipment is relatively independent, either directly connected to the end user's AC power distribution system through an inverter as a backup power source; or connected to a photovoltaic controller as a tool for photovoltaic staggered energy use. The core role of energy storage equipment as an important component of the terminal DC power distribution system in the new power system has not been fully utilized;

[0007] 4. The new power system lacks innovative products and solutions in terminal application scenarios.

[0008] In view of this, the inventors invented an integrated distributed energy storage photovoltaic panel device ESP (Energy Solar Package) for use in a DC power distribution system, which effectively solved the terminal application scenarios of the low-voltage DC power distribution system through innovation. Summary of the invention

[0009] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a distributed energy storage photovoltaic panel integrated device ESP applied to a DC distribution system, which has the advantages of realizing an integrated modular design and comprehensive control and protection of energy storage devices and photovoltaic devices applied to DC distribution systems, expanding modular application scenarios and breaking through the system architecture and functional positioning in traditional applications, and being able to realize large-scale application of terminal DC distribution systems.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system, comprising a photovoltaic unit module, an energy storage unit module, a DC power distribution control and protection unit module, a local function unit module and a housing,

[0011] The energy storage unit module is arranged in the housing, and is used to store energy and assist the DC power distribution control and protection unit module to coordinate energy supply, and supply DC power to the local functional unit;

[0012] A photovoltaic unit module is arranged on the housing and is used to supply direct current to the local functional unit and the energy storage unit module;

[0013] The DC power distribution control and protection unit module is arranged in the housing and is arranged in a modular PCB board, and is used to coordinate and protect the energy supply status between the energy storage unit module, the photovoltaic unit module and the local function unit module;

[0014] The local function unit module is arranged on the housing and is arranged in a modular PCB board, and is used to provide an IoT control function, a lighting function, power supply for communication equipment, and power supply for digital equipment;

[0015] The energy storage unit module, photovoltaic unit module, DC power distribution control and protection unit module and local function unit module are all electrically connected.

[0016] By adopting the above technical solution, the working principle of the distributed energy storage photovoltaic panel integrated device ESP is as follows: the energy storage unit module, the photovoltaic unit module, the DC power distribution control unit module and the local function unit module form a complete system. During the operation, the photovoltaic unit module and the energy storage unit module coordinate with each other through the DC power distribution control unit module and provide constant voltage DC power to the local function unit module.

[0017] The distributed energy storage photovoltaic panel integrated device ESP has the following conditions in the application operation mechanism:

[0018] Under normal sunshine conditions, the photovoltaic unit module can supply DC power to the local functional unit module, and when the energy storage unit module is not fully charged, the photovoltaic unit module can charge the energy storage unit module at the same time under the coordinated control of the DC power distribution control and protection unit module;

[0019] When the photovoltaic unit module cannot meet the power demand of the local functional unit module, the energy storage unit module supplies power to the local functional unit module together with the photovoltaic unit module under the coordinated control of the DC power distribution control and protection unit module. At this time, the energy storage unit module and the DC power distribution control and protection unit module provide corresponding protection functions respectively.

[0020] In the absence of sunshine, the photovoltaic unit module stops supplying power, and the energy storage unit module directly supplies power to the local functional unit module;

[0021] When the external power supply participates in the power supply of the local functional unit module through the DC power distribution control and protection unit module, the power supply priority is as follows: photovoltaic unit module -> external power supply -> energy storage unit module;

[0022] When a single distributed energy storage photovoltaic panel integrated device ESP is used independently, the energy storage unit module can be charged through the external power supply of the DC power distribution control and protection unit module, or the DC power distribution control and protection unit module coordinates the photovoltaic unit module to charge. Under the design working conditions, the photovoltaic unit module and the energy storage unit module provide constant voltage electricity to the local functional unit module through the coordination of the DC power distribution control and protection unit module;

[0023] When multiple distributed energy storage photovoltaic panel integrated devices ESP are used in parallel, the DC power distribution control and protection unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP can be reconstructed in parallel into the same DC power distribution system, so that the corresponding photovoltaic unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a parallel relationship and the corresponding energy storage unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a parallel relationship, and after parallel connection, a distributed energy storage photovoltaic panel integrated device ESP group is formed, and the power supply capacity is expanded at the same time, which can meet the application capacity requirements of the local functional unit modules. When in parallel, the high-energy distributed energy storage photovoltaic panel integrated device ESP transfers electric energy to the low-energy distributed energy storage photovoltaic panel integrated device ESP, and finally the energy of the distributed energy storage photovoltaic panel integrated device ESP in the same parallel system is balanced, and the operating mechanism of a single distributed energy storage photovoltaic panel integrated device ESP after parallel connection meets the operating mechanism requirements of the distributed energy storage photovoltaic panel integrated device ESP group;

[0024] When multiple distributed energy storage photovoltaic panel integrated devices ESP are used in series, the DC power distribution control and protection unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP can be connected in series to reconstruct the same DC power distribution system, so that the corresponding photovoltaic unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a series relationship and the corresponding energy storage unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a series relationship, and after the series connection, a distributed energy storage photovoltaic panel integrated device ESP group is formed, and the voltage level is expanded at the same time, and it can be connected to a DC power distribution system with multiple voltage levels such as 12V, 24V, and 48V. When connected in series, the photovoltaic unit modules of the distributed energy storage photovoltaic panel integrated device ESP can assist in realizing the balanced control in the series architecture, and after the series connection, the operation mechanism of a single distributed energy storage photovoltaic panel integrated device ESP not only meets the operation mechanism requirements of the distributed energy storage photovoltaic panel integrated device ESP group, but also has the characteristics of independent operation.

[0025] In summary, the photovoltaic unit module, energy storage unit module, DC power distribution control and protection unit module, local function unit module and shell form a complete distributed energy storage photovoltaic panel integrated device ESP, and the distributed energy storage photovoltaic panel integrated device ESP can be used individually, in multiple series or in multiple parallel connections, thereby realizing the integrated modular design and comprehensive control and protection of energy storage devices and photovoltaic devices used in DC power distribution systems, expanding modular application scenarios and breaking through the system architecture and functional positioning in traditional applications, enabling large-scale application of terminal DC power distribution systems and promoting the development of new power systems.

[0026] Preferably, the DC power distribution control and protection unit module includes a photovoltaic control module electrically connected to the photovoltaic unit module, an energy storage control module electrically connected to the energy storage unit module, a local control module electrically connected to the local functional unit module, an expansion control module with an expansion interface, and a main control unit electrically connected to the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module. The photovoltaic control module is used to monitor the power supply of the photovoltaic unit module and transmit the information to the main control unit, the energy storage control module is used to coordinate and control the energy storage unit module and cooperate with the photovoltaic unit module for power supply, the local control module is used to coordinate and control the power supply of the local functional unit module, the expansion control module is used to control the protection expansion interface, and the main control unit is used to receive information transmitted by the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module and control the coordinated operation of the four.

[0027] By adopting the above technical solution, when the photovoltaic unit module, the external power supply and the energy storage unit module need to be regulated by the DC power distribution control and protection unit module, the photovoltaic unit module transmits information to the photovoltaic control module, so that the power supply situation on the photovoltaic unit module is summarized to the photovoltaic control module, and the photovoltaic control module processes the information and transmits the processed information to the main control unit, and the local function unit module transmits the required power information to the local control module, and the local control module processes the received information and transmits it to the main control unit. After analysis and processing by the main control unit, when the power provided by the photovoltaic unit module is insufficient to maintain the use of the local function unit module, the main control unit transmits the information to the energy storage control module, and the energy storage control module issues instructions to the energy storage unit module to cooperate with the photovoltaic unit module to power the local function unit module, so that The power consumption of the local functional unit modules is kept balanced; when the power on the energy storage unit module is insufficient, the energy storage unit module transmits the information to the energy storage control module, and then the energy storage control module organizes the received information and sends it to the main control unit, and when the photovoltaic unit module provides insufficient power, the power supply is stopped and a prompt is given; when an external power supply is connected through the expansion control module and the local functional unit modules are used, when the photovoltaic unit module is insufficient to supply power to the local functional unit modules, the external power supply on the expansion control module cooperates with the photovoltaic unit module to supply power to the local functional unit modules, and when the photovoltaic unit module and the external power supply on the expansion control module are insufficient to supply power to the local functional unit modules, the energy storage unit module coordinates with the energy storage control module to supply power to the local functional unit modules.

[0028] Preferably, the photovoltaic control module includes a measuring sensor electrically connected to the photovoltaic unit module, a first protector electrically connected to the measuring sensor, a first interface unit electrically connected to the first protector and the main control unit respectively, and a first distributed processor DPU and a first constant data storage device electrically connected to the measuring sensor, the first protector and the first interface unit.

[0029] By adopting the above technical solution, when the photovoltaic unit module transmits information to the photovoltaic control module, the measuring sensor can receive the electric energy information on the photovoltaic unit module, and the measuring sensor will process the received information and then transmit it to the first distributed processor DPU. The first distributed processor DPU will analyze and make decisions and then upload the information to the main control unit. The main control unit will process the received information and then transmit it to the first distributed processor DPU and the first fixed value data storage device. The first distributed processor DPU will collect, process and judge the information received by the main control unit, and when needed, it will issue relative instructions to the first protector, and the first fixed value data storage device will store the received information.

[0030] Preferably, the energy storage control module includes a first flow controller electrically connected to the energy storage unit module, a second protector electrically connected to the first flow controller, a second interface unit electrically connected to the second protector and the main control unit respectively, and a second distributed processor DPU and a second constant data storage device electrically connected to the first flow control, the second protector and the second interface unit.

[0031] By adopting the above technical solution, when the energy storage unit module transmits information to the energy storage control module, the first flow controller can receive the electric energy information on the energy storage unit module, the first flow controller will process the received information and then transmit it to the second distributed processor DPU, the second distributed processor DPU will analyze and make decisions and then upload the information to the main control unit, the main control unit will process the received information and then transmit it to the second distributed processor DPU and the second fixed value data storage device, the second distributed processor DPU will collect, process and judge the information received by the main control unit, and when necessary, it will issue relative instructions to the second protector, and the second fixed value data storage device will store the received information.

[0032] Preferably, the local control module includes a fourth interface unit electrically connected to the local functional unit module, a third protector electrically connected to the fourth interface unit, a third interface unit electrically connected to the third protector and the main control unit respectively, and a third distributed processor DPU and a third constant data storage device electrically connected to the fourth interface unit, the third protector and the third interface unit.

[0033] By adopting the above-mentioned technical solution, when the local functional unit module transmits the required power requirement information to the local control module, the fourth interface unit can receive the required power information on the local functional unit module, and the fourth interface unit transmits the received information to the third distributed processor DPU. The third distributed processor DPU analyzes and makes decisions and then uploads the information to the main control unit. The main control unit processes the received information and then transmits it to the third distributed processor DPU and the third fixed value data storage device. The third distributed processor DPU collects, processes and judges the information received by the main control unit, and when necessary, it will issue relative instructions to the third protector, and the received information will be stored in the third fixed value data storage device.

[0034] Preferably, the expansion control module includes a serial-parallel controller electrically connected to the expansion interface, a second flow controller electrically connected to the serial-parallel controller, a fourth protector electrically connected to the second flow controller and the main control unit respectively, and a fourth distributed processor DPU electrically connected to the serial-parallel controller, the second flow controller and the fourth protector.

[0035] By adopting the above technical solution, when it is necessary to connect related components externally through the expansion interface, the serial-parallel controller can receive information of the external related components, the serial-parallel controller processes the received information and passes it to the fourth distributed processor DPU, the fourth distributed processor DPU analyzes and makes decisions and then uploads the information to the main control unit, the main control unit processes the received information and passes it to the fourth distributed processor DPU, the fourth distributed processor DPU collects, processes and judges the information received by the main control unit, and issues relative instructions to the fourth protector when necessary.

[0036] Preferably, the main control unit module includes a DC bus system and a fifth interface unit electrically connected to the DC bus system, a monitoring and protection unit electrically connected to the fifth interface unit, and a central processing unit CPU electrically connected to the fifth interface unit and the monitoring and protection unit, a storage unit, a clock unit, a display unit and a communication processing unit. The central processing unit CPU is electrically connected to the photovoltaic control module, the energy storage control module, the local control module and the extended control module and is used to obtain uploaded information and realize coordinated operation control of the photovoltaic control module, the energy storage control module, the local control module and the extended control module. The central processing unit CPU is connected to the cloud server through the communication processing unit and accepts cloud server control and remote parameter setting.

[0037] By adopting the above technical solution, the main control unit module is mainly used to receive information uploaded by the photovoltaic control module, energy storage control module, local control module and expansion control module, and coordinate the photovoltaic control module, energy storage control module and expansion control module according to the relative conditions, and provide constant voltage power supply to the local control module.

[0038] Preferably, the local functional unit module includes a charging control protection unit, a lighting unit, an Internet of Things unit and a local power interface unit.

[0039] By adopting the above technical solution, it is possible to provide the distributed energy storage photovoltaic panel integrated device ESP with Internet of Things control function, lighting function, power supply for communication equipment, power supply for digital equipment and expand other local functions.

[0040] In summary, the present invention has the following advantages:

[0041] 1. The integrated modular design optimizes the usage and configuration methods;

[0042] 2. Through the DC distribution unit, control and protection are provided, which realizes the flexible configuration of distributed energy storage and distributed photovoltaic series and parallel, and provides a new solution for the terminal DC distribution system;

[0043] 3. Improve the reliability and safety of energy storage system and photovoltaic system operation through distributed protection and control;

[0044] 4. Improved the utilization efficiency of solar energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a functional block diagram of this embodiment;

[0046] Figure 2 2 is a schematic diagram of the main structure of the present embodiment;

[0047] Figure 3 2 is a left-side structural schematic diagram of the present embodiment;

[0048] Figure 4 2 is a schematic diagram of the right side structure of the present embodiment;

[0049] Figure 5 is a schematic structural diagram of the photovoltaic unit module of this embodiment;

[0050] Figure 6 is a structural schematic diagram of the energy storage unit module of this embodiment;

[0051] Figure 7 is a schematic diagram of the structure of the local functional unit module of this embodiment;

[0052] Figure 8 This is a schematic diagram of the use structure of a single distributed energy storage photovoltaic panel integrated device ESP in this embodiment;

[0053] Fig. 9 It is a schematic diagram of the structure of parallel use of multiple distributed energy storage photovoltaic panel integrated devices ESP in this embodiment;

[0054] Fig.10 This is a schematic diagram of the structure of multiple distributed energy storage photovoltaic panel integrated devices ESP used in series in this embodiment;

[0055] Fig.11 This is a schematic diagram of the structure of multiple distributed energy storage photovoltaic panel integrated devices ESP series and parallel use in this embodiment Figure 1 ;

[0056] Fig.12 This is a schematic diagram of the structure of multiple distributed energy storage photovoltaic panel integrated devices ESP series and parallel use in this embodiment Figure 2 ;

[0057] Fig.13 This is a schematic diagram of the structure of multiple distributed energy storage photovoltaic panel integrated devices ESP series and parallel use in this embodiment Figure 3 ;

[0058] Fig.14 It is a functional block diagram of the DC power distribution control and protection unit module of this embodiment.

[0059] Explanation of the accompanying drawings: 1. Shell; 2. High-efficiency photovoltaic module; 3. Direction control protection unit; 4. Energy storage cell module; 5. Control protection unit; 6. Busbar; 7. Energy storage access cable; 8. Energy storage access port; 9. Charging control protection unit; 10. Lighting unit; 11. Internet of Things unit; 12. Local power interface unit; 13. Energy storage power display screen; 14. Communication protection reset device; 15. Communication interface; 16. QC4.0 / PD3.0 output port; 17. Charging interface; 18. DC 12V output port. DETAILED DESCRIPTION

[0060] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0061] A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system, such as Figure 1 , 2 As shown, it includes a photovoltaic unit module, an energy storage unit module, a DC power distribution control and protection unit module, a local function unit module and a shell 1, wherein the energy storage unit module is installed inside the shell 1, and is used to store energy and assist the DC power distribution control and protection unit module in coordinating energy supply, and supply DC power to the local function unit; the photovoltaic unit module is installed on the outer wall of the shell 1, and is used to supply DC power to the local function unit and the energy storage unit module; the DC power distribution control and protection unit module is installed inside the shell 1, and is arranged in a modular PCB board, and is used to coordinate and protect the energy supply status between the energy storage unit module, the photovoltaic unit module and the local function unit module; the local function unit module is installed on the shell 1, and is arranged in a modular PCB board, and is used to provide Internet of Things control function, lighting function, power supply for communication equipment and power supply for digital equipment; the energy storage unit module, the photovoltaic unit module, the DC power distribution control and protection unit module and the local function unit module are all electrically connected.

[0062] like Figure 2 , 5 As shown, the photovoltaic unit module includes a high-efficiency photovoltaic module 2 and a direction control protection unit 3. In the case of no special placement angle, the energy storage battery can be charged at any time to offset the standby power consumption of the equipment (energy storage equipment), improve the overall standby efficiency of the distributed energy storage photovoltaic panel integrated device ESP equipment, and extend the standby time; when the energy storage unit is discharged, the photovoltaic unit superimposes power supply to increase the overall power supply power of the equipment; when the distributed energy storage photovoltaic panel integrated device ESP equipment is used in series and parallel, it cooperates with the energy storage unit to control the flow direction; when the distributed energy storage photovoltaic panel integrated device ESP equipment is used in series and parallel, the distributed balanced control of the energy storage unit is realized.

[0063] like Figure 6As shown, the energy storage unit module includes several arranged and combined energy storage cell modules 4, control and protection units 5, busbars 6, energy storage access cables 7 and energy storage access ports 8, and the control and protection unit 5 includes a balancing control line and an energy storage protection unit. When the distributed energy storage photovoltaic panel integrated device ESP is charged and discharged, the energy storage unit module provides a voltage stabilization function for the photovoltaic unit and the DC power distribution control and protection unit module; when multiple distributed energy storage photovoltaic panel integrated devices ESP are used in series and parallel, the energy storage unit module cooperates with the photovoltaic unit to control the flow direction and provide a reference voltage.

[0064] like Figure 3 , 4 As shown in , 7, the local functional unit module includes a charging control protection unit 9, a lighting unit 10, an Internet of Things unit 11 and a local power interface unit 12. The housing 1 is provided with an energy storage power display screen 13 electrically connected to the energy storage unit module. The housing 1 is provided with a communication interface 15 electrically connected to the local functional unit module, a communication protection reset device 14, a QC4.0 / PD3.0 output port 16, a charging interface 17, a DC 12V output port and a solar panel, which can provide Internet of Things control function, lighting function, power supply for communication equipment, power supply for digital equipment and expand other local functions for the distributed energy storage photovoltaic panel integrated device ESP.

[0065] The distributed energy storage photovoltaic panel integrated device ESP has the following conditions in the application operation mechanism:

[0066] Under normal sunshine conditions, the photovoltaic unit module can supply DC power to the local functional unit module, and when the energy storage unit module is not fully charged, the photovoltaic unit module can charge the energy storage unit module at the same time under the coordinated control of the DC power distribution control and protection unit module;

[0067] When the photovoltaic unit module cannot meet the power demand of the local functional unit module, the energy storage unit module supplies power to the local functional unit module together with the photovoltaic unit module under the coordinated control of the DC power distribution control and protection unit module. At this time, the energy storage unit module and the DC power distribution control and protection unit module provide corresponding protection functions respectively.

[0068] In the absence of sunshine, the photovoltaic unit module stops supplying power, and the energy storage unit module directly supplies power to the local functional unit module;

[0069] When the external power supply participates in the power supply of the local functional unit module through the DC power distribution control and protection unit module, the power supply priority is as follows: photovoltaic unit module -> external power supply -> energy storage unit module.

[0070] like Figure 8As shown, when a single distributed energy storage photovoltaic panel integrated device ESP is used independently, the energy storage unit module can be charged through the external power supply of the DC power distribution control and protection unit module, and can also be charged through the coordination of the photovoltaic unit module through the DC power distribution control and protection unit module, and can also be connected to the AC power distribution system through the expansion interface to connect the inverter; under the design conditions, the photovoltaic unit module and the energy storage unit module provide constant voltage DC power to the local functional unit module through the coordination of the DC power distribution control and protection unit module.

[0071] like Fig. 9 As shown, when multiple distributed energy storage photovoltaic panel integrated devices ESP are used in parallel, the DC power distribution control and protection unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP can be reconstructed in parallel into the same DC power distribution system, so that the corresponding photovoltaic unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a parallel relationship and the corresponding energy storage unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a parallel relationship, and after parallel connection, a distributed energy storage photovoltaic panel integrated device ESP group is formed, and the power supply capacity is expanded at the same time, which can meet the application capacity requirements of the local functional unit modules. When in parallel, the high-energy distributed energy storage photovoltaic panel integrated device ESP transfers electric energy to the low-energy distributed energy storage photovoltaic panel integrated device ESP, and finally the energy of the distributed energy storage photovoltaic panel integrated device ESP in the same parallel system is balanced, and the operation mechanism of a single distributed energy storage photovoltaic panel integrated device ESP after parallel connection meets the operation mechanism requirements of the distributed energy storage photovoltaic panel integrated device ESP group.

[0072] like Fig.10 As shown, when multiple distributed energy storage photovoltaic panel integrated devices ESP are used in series, the DC power distribution control and protection unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP can be connected in series to reconstruct the same DC power distribution system, so that the corresponding photovoltaic unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a series relationship and the corresponding energy storage unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a series relationship, and after the series connection, a distributed energy storage photovoltaic panel integrated device ESP group is formed, and the voltage level is expanded at the same time, and it can be connected to a DC power distribution system with multiple voltage levels such as 12V, 24V, and 48V. When connected in series, the photovoltaic unit modules of the distributed energy storage photovoltaic panel integrated device ESP can assist in realizing the balanced control in the series architecture, and after the series connection, the operation mechanism of a single distributed energy storage photovoltaic panel integrated device ESP not only meets the operation mechanism requirements of the distributed energy storage photovoltaic panel integrated device ESP group, but also has the characteristics of independent operation.

[0073] like Fig.11 , 12As shown in Figures 13, when multiple distributed energy storage photovoltaic panel integrated devices ESP are used in series and parallel, the corresponding energy storage unit modules in the multiple distributed energy storage photovoltaic panel integrated devices ESP form a series relationship, and after the series connection, a distributed energy storage photovoltaic panel integrated device ESP group is formed, and the voltage level is expanded at the same time, and it can be connected to a DC distribution system with multiple voltage levels such as 12V, 24V, 48V, etc. Then, multiple distributed energy storage photovoltaic panel integrated device ESP groups are connected in parallel to form a distributed energy storage photovoltaic panel integrated device ESP group, and the power supply capacity is expanded at the same time. Therefore, the operating mechanism of a single distributed energy storage photovoltaic panel integrated device ESP after series and parallel connection meets the operating mechanism requirements of the distributed energy storage photovoltaic panel integrated device ESP group.

[0074] like Fig.14 As shown, the DC power distribution control and protection unit module includes a photovoltaic control module electrically connected to the photovoltaic unit module, an energy storage control module electrically connected to the energy storage unit module, a local control module electrically connected to the local function unit module, an expansion control module with an expansion interface, and a main control unit electrically connected to the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module. The photovoltaic control module is used to monitor the power supply of the photovoltaic unit module and transmit the information to the main control unit, the energy storage control module is used to coordinate and control the energy storage unit module and cooperate with the photovoltaic unit module for power supply, the local control module is used to coordinate and control the power supply of the local function unit module, the expansion control module is used to control the protection expansion interface, and the main control unit is used to receive information transmitted by the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module and control the coordinated operation of the four.

[0075] When the photovoltaic unit module, the external power supply and the energy storage unit module need to be regulated by the DC power distribution control and protection unit module, the photovoltaic unit module transmits information to the photovoltaic control module, so that the power supply situation on the photovoltaic unit module is summarized to the photovoltaic control module, and the photovoltaic control module processes the information and transmits the processed information to the main control unit, and the local function unit module transmits the required power information to the local control module, and the local control module processes the received information and transmits it to the main control unit. After analysis and processing by the main control unit, when the power provided by the photovoltaic unit module is insufficient to maintain the use of the local function unit module, the main control unit transmits the information to the energy storage control module, and the energy storage control module issues instructions to the energy storage unit module to cooperate with the photovoltaic unit module to supply power to the local function unit module. electricity, so that the power consumption of the local functional unit modules remains balanced; when the power on the energy storage unit module is insufficient, the energy storage unit module transmits information to the energy storage control module, and then the energy storage control module organizes the received information and sends it to the main control unit, and stops supplying electricity and gives a prompt when the photovoltaic unit module provides insufficient power; when an external power source is connected through the charging interface 17 and the local functional modules are used at the same time, when the photovoltaic unit module is insufficient to power the local functional unit module, the external power source cooperates with the photovoltaic unit module to power the local functional unit module, and when the photovoltaic unit module and the external power source are insufficient to power the local functional unit module, the energy storage unit module coordinates with the energy storage control module to power the local functional unit module.

[0076] like Fig.14 As shown, the photovoltaic control module includes a measuring sensor electrically connected to the photovoltaic unit module, a first protector electrically connected to the measuring sensor, a first interface unit electrically connected to the first protector and the main control unit respectively, and a first distributed processor DPU and a first constant data storage device electrically connected to the measuring sensor, the first protector and the first interface unit.

[0077] When the photovoltaic unit module transmits information to the photovoltaic control module, the measuring sensor can receive the electric energy information on the photovoltaic unit module. The measuring sensor will process the received information and then transmit it to the first distributed processor DPU. The first distributed processor DPU will analyze and make decisions and then upload the information to the main control unit. The main control unit will process the received information and then transmit it to the first distributed processor DPU and the first fixed value data storage device. The first distributed processor DPU will collect, process and judge the information received by the main control unit, and will issue relative instructions to the first protector when needed, and the first fixed value data storage device will store the received information.

[0078] like Fig.14As shown, the energy storage control module includes a first flow controller electrically connected to the energy storage unit module, a second protector electrically connected to the first flow controller, a second interface unit electrically connected to the second protector and the main control unit respectively, and a second distributed processor DPU and a second constant data storage device electrically connected to the first flow control, the second protector and the second interface unit.

[0079] When the energy storage unit module transmits information to the energy storage control module, the first power flow controller can receive the electric energy information on the energy storage unit module. The first power flow controller will process the received information and then transmit it to the second distributed processor DPU. The second distributed processor DPU will analyze and make decisions and then upload the information to the main control unit. The main control unit will process the received information and then transmit it to the second distributed processor DPU and the second fixed value data storage device. The second distributed processor DPU will collect, process and judge the information received by the main control unit, and will issue relative instructions to the second protector when needed, and the second fixed value data storage device will store the received information.

[0080] like Fig.14 As shown, the local control module includes a fourth interface unit electrically connected to the local functional unit module, a third protector electrically connected to the fourth interface unit, a third interface unit electrically connected to the third protector and the main control unit respectively, and a third distributed processor DPU and a third constant data storage device electrically connected to the fourth interface unit, the third protector and the third interface unit.

[0081] When the local functional unit module transmits the required power requirement information to the local control module, the fourth interface unit can receive the required power information on the local functional unit module, and the fourth interface unit transmits the received information to the third distributed processor DPU. The third distributed processor DPU analyzes and makes decisions and then uploads the information to the main control unit. The main control unit processes the received information and transmits it to the third distributed processor DPU and the third fixed value data storage device. The third distributed processor DPU collects, processes and judges the information received by the main control unit, and when necessary, it will issue relative instructions to the third protector, and the third fixed value data storage device will store the received information.

[0082] like Fig.14 As shown, the expansion control module includes a serial-parallel controller electrically connected to the expansion interface, a second flow controller electrically connected to the serial-parallel controller, a fourth protector electrically connected to the second flow controller and the main control unit respectively, and a fourth distributed processor DPU electrically connected to the serial-parallel controller, the second flow controller and the fourth protector.

[0083] When it is necessary to connect related components through the expansion interface, the serial-parallel controller can receive information about the external related components, and the serial-parallel controller will process the received information and pass it to the fourth distributed processor DPU. The fourth distributed processor DPU will analyze and make decisions and then upload the information to the main control unit. The main control unit will process the received information and pass it to the fourth distributed processor DPU. The fourth distributed processor DPU will collect, process and judge the information received by the main control unit, and issue relative instructions to the fourth protector when necessary.

[0084] like Fig.14 As shown, the main control unit module includes a DC bus system and a fifth interface unit electrically connected thereto, a monitoring and protection unit electrically connected to the fifth interface unit, and a central processing unit CPU electrically connected to the fifth interface unit and the monitoring and protection unit, a storage unit, a clock unit, a display unit, and a communication processing unit. The central processing unit CPU is electrically connected to the photovoltaic control module, the energy storage control module, the local control module, and the extended control module and is used to obtain uploaded information and realize coordinated operation control of the photovoltaic control module, the energy storage control module, the local control module, and the extended control module. The central processing unit CPU is connected to the cloud server through the communication processing unit and accepts cloud server control and remote parameter settings. The upper main control unit module is mainly used to receive information uploaded by the photovoltaic control module, the energy storage control module, the local control module, and the extended control module, and coordinates and cooperates with the photovoltaic control module, the energy storage control module, and the extended control module according to the relative conditions, and provides constant voltage power supply to the local control module.

[0085] The working process and beneficial effects of the present invention are as follows: a complete system is formed by an energy storage unit module, a photovoltaic unit module, a DC power distribution control and protection unit module, and a local function unit module. During operation, the photovoltaic unit module and the energy storage unit module coordinate operation through the DC power distribution control and protection unit module and provide constant voltage DC power to the local function unit module.

[0086] In summary, the photovoltaic unit module, energy storage unit module, DC power distribution control and protection unit module, local function unit module and housing 1 form a complete distributed energy storage photovoltaic panel integrated device ESP, and the distributed energy storage photovoltaic panel integrated device ESP can be used individually, in multiple series, and in multiple parallel connections, thereby realizing the integrated modular design and comprehensive control and protection of energy storage devices and photovoltaic devices used in DC power distribution systems, expanding modular application scenarios and breaking through the system architecture and functional positioning in traditional applications, enabling large-scale application of terminal DC power distribution systems and promoting the development of new power systems.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system, characterized by: It includes a photovoltaic unit module, an energy storage unit module, a DC power distribution control and protection unit module, a local function unit module and a housing (1). An energy storage unit module is arranged in the housing (1), and is used to store energy and assist the DC power distribution control and protection unit module in coordinating energy supply, and supplying DC power to the local functional unit; A photovoltaic unit module is arranged on the housing (1) and is used to supply direct current to the local functional unit and the energy storage unit module; A DC power distribution control and protection unit module is arranged in the housing (1) and is arranged in the form of a modular PCB board, and is used to coordinate and protect the energy supply conditions between the energy storage unit module, the photovoltaic unit module and the local function unit module; The local functional unit module is arranged on the housing (1) and is arranged in the form of a modular PCB board, and is used to provide an Internet of Things control function, a lighting function, power supply for communication equipment, and power supply for digital equipment; The energy storage unit module, photovoltaic unit module, DC power distribution control and protection unit module and local function unit module are all electrically connected.

2. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 1, characterized in that: The DC power distribution control and protection unit module includes a photovoltaic control module electrically connected to the photovoltaic unit module, an energy storage control module electrically connected to the energy storage unit module, a local control module electrically connected to the local function unit module, an expansion control module with an expansion interface, and a main control unit electrically connected to the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module. The photovoltaic control module is used to monitor the power supply of the photovoltaic unit module and transmit the information to the main control unit, the energy storage control module is used to coordinate and control the energy storage unit module and cooperate with the photovoltaic unit module for power supply, the local control module is used to coordinate and control the power supply of the local function unit module, the expansion control module is used to control the protection expansion interface, and the main control unit is used to receive information transmitted by the photovoltaic control module, the energy storage control module, the local control module, and the expansion control module and control the coordinated operation of the four.

3. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 2, characterized in that: The photovoltaic control module includes a measuring sensor electrically connected to the photovoltaic unit module, a first protector electrically connected to the measuring sensor, a first interface unit electrically connected to the first protector and the main control unit respectively, and a first distributed processor DPU and a first fixed value data storage device electrically connected to the measuring sensor, the first protector and the first interface unit.

4. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 2, characterized in that: The energy storage control module includes a first flow controller electrically connected to the energy storage unit module, a second protector electrically connected to the first flow controller, a second interface unit electrically connected to the second protector and the main control unit respectively, and a second distributed processor DPU and a second constant value data storage device electrically connected to the first flow control, the second protector, and the second interface unit.

5. The distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 2, characterized in that: The local control module includes a fourth interface unit electrically connected to the local functional unit module, a third protector electrically connected to the fourth interface unit, a third interface unit electrically connected to the third protector and the main control unit respectively, and a third distributed processor DPU and a third constant data storage device electrically connected to the fourth interface unit, the third protector and the third interface unit.

6. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 2, characterized in that: The expansion control module includes a serial-parallel controller electrically connected to the expansion interface, a second flow controller electrically connected to the serial-parallel controller, a fourth protector electrically connected to the second flow controller and the main control unit respectively, and a fourth distributed processor DPU electrically connected to the serial-parallel controller, the second flow controller and the fourth protector.

7. A distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 2, characterized in that: The main control unit module includes a DC bus system and a fifth interface unit electrically connected to the DC bus system, a monitoring and protection unit electrically connected to the fifth interface unit, and a central processing unit CPU electrically connected to the fifth interface unit and the monitoring and protection unit, a storage unit, a clock unit, a display unit, and a communication processing unit. The central processing unit CPU is electrically connected to the photovoltaic control module, the energy storage control module, the local control module, and the extended control module and is used to obtain uploaded information and realize coordinated operation control of the photovoltaic control module, the energy storage control module, the local control module, and the extended control module. The central processing unit CPU is connected to the cloud server through the communication processing unit and accepts cloud server control and remote parameter settings.

8. The distributed energy storage photovoltaic panel integrated device ESP applied to a DC power distribution system according to claim 1, characterized in that: The local functional unit module comprises a charging control protection unit (9), a lighting unit (10), an Internet of Things unit (11) and a local power interface unit (12).

Images