Control system and control method for micro-grid energy management

Abstract

The invention relates to a control system and a control method for micro-grid energy management. The system comprises a power supply module, a CAN communication module, an RS485 communication module, a display module, a DIDO module and a storage module, and the power supply module is 12-60V power supply input; the CAN communication module is connected with an external energy storage battery, communicates with the outside and is used for uploading operation data and receiving a control instruction; the RS485 communication module is connected with the energy storage inverter and the photovoltaic controller and is used for sending a control instruction and receiving state data; the display module is an OLED screen with a preset size and is used for displaying state data of the energy management system and performing man-machine interaction; the DIDO module is connected with the key board; and the storage module carries out historical recording on the data. According to the invention, energy management logic layering is realized through the state machine, battery energy storage management control is effectively realized, hardware communication resources are reasonably allocated, and the hardware platform adaptability is good.

Description

Background Art

[0002] In order to solve energy and environmental problems, countries around the world have been committed to promoting the development of new energy. The application of new energy power is becoming more and more extensive, and an emerging energy and power market is gradually forming. However, the energy density of new energy is low, and high-power power generation requires a suitable site. The power is unstable and is an intermittent power source, so new energy power generation often has unstable voltage and frequency, which can easily cause serious impact on the large power grid. The introduction of microgrid technology provides an important technical direction for the efficient use of new energy power. Microgrids have become an important means for some developed countries to solve many problems in the power system.

[0003] In the prior art, CN202210823412.X-A microgrid energy management and control method: The present invention discloses a microgrid energy management and control method, which belongs to the field of multi-microgrid energy management technology. The present invention obtains the load, output and energy storage power of each microgrid within a preset time in the future through data acquisition and calculation modules of multiple microgrid systems, and judges whether there is one or two supply microgrids whose supply power is greater than the demand power of the demand microgrid based on the blockchain cloud service platform. At the same time, according to the transmission distance and electricity price factors, the demand microgrid is used as the interest benchmark for sorting, thereby realizing the energy scheduling management and control problem of multiple supply microgrids. As for the intersection of the existing microgrid system, the present invention takes the electricity price difference of microgrids in different regions and the scheduling impact brought by the power transmission distance as considerations, and screens and sorts the supply microgrid or the combined supply microgrid according to them, which is conducive to low-cost and high-efficiency energy management and control between multiple microgrids.

[0004] CN202110085993.7-A method for autonomous energy control of a single-machine energy storage converter of an independent microgrid: The present invention proposes a method and system for autonomous energy control of a single-machine energy storage converter of an independent microgrid, including: when the energy management system of the independent microgrid fails, when the energy autonomy enabling command takes effect, the initial state of charge interval and the initial active power command value of the battery are recorded; according to the current state of charge interval, the previous state of charge interval, the initial state of charge interval and the initial active power command value, the active power command value of the independent microgrid energy storage converter is adjusted. The method and system adjust the output power of the independent microgrid energy storage converter according to the current state of charge interval, the previous state of charge interval and the initial state of charge interval, and can control a single energy storage converter and its supporting battery to avoid the phenomenon of full charging or emptying of the battery of a single converter when the EMS fails and cannot collect information of all energy storage converters and supporting batteries.

[0005] However, none of the above methods can realize the energy management logic layering through the state machine and effectively realize the battery energy storage management control.

[0006] Therefore, one or more methods are needed to solve the above problems.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] The purpose of the present disclosure is to provide a control system and a control method for microgrid energy management, thereby overcoming one or more problems caused by limitations and defects of related technologies at least to a certain extent.

[0009] According to one aspect of the present disclosure, a control system for microgrid energy management is provided, the system comprising a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein:

[0010] The power module has a 12-60V power input;

[0011] The CAN communication module connects the external energy storage battery and external communication to upload operation data and receive control instructions;

[0012] The RS485 communication module connects the energy storage inverter and the photovoltaic controller to send control instructions and receive status data;

[0013] The display module is an OLED screen of preset size, which is used to display the status data of the energy management system and human-computer interaction;

[0014] DIDO module connected to the keypad;

[0015] The storage module records the data historically.

[0016] In an exemplary embodiment of the present disclosure, the system further includes:

[0017] The control system EMS of microgrid energy management, photovoltaic controller and energy storage converter PCS constitute the microgrid management unit;

[0018] Each of the microgrid management units is connected to two battery units.

[0019] In an exemplary embodiment of the present disclosure, the system further includes:

[0020] The microgrid energy management control system EMS regulates the energy storage converter PCS and photovoltaic controller module to manage the battery charge and discharge reasonably, realizing the mobile power supply function.

[0021] In one aspect of the present disclosure, a control method for microgrid energy management is provided, comprising:

[0022] After the EMS is powered on, it enters the power-on default state, assigns default values ​​to key data, assigns default values ​​to status bit data, and then jumps the state machine to the initialization state;

[0023] In the initialization state, the state or mode of the flag bit, button module, PCS, BMS and photovoltaic controller are initialized, and the state or mode is jumped to the power-off state or standby detection state according to the conditions;

[0024] If normal, it will jump to the standby detection state. In the standby detection state, it will determine whether the battery needs maintenance and charging, and detect whether the switch button state enters the power-off state;

[0025] If normal, it will jump to the startup state. In the startup state, it will start the PV controller and PCS according to different conditions. It will also determine whether to enter the fault standby state and power-off state.

[0026] After each module starts normally in the startup operation state, it jumps to the continuous operation state;

[0027] Power-off state: In any state, as long as the power-on button is detected to be popped up, the power-off state is immediately entered. In this state, the PCS and photovoltaic controller are turned off first, and finally the battery is turned off to complete the power-off.

[0028] In an exemplary embodiment of the present disclosure, the continuous operation state of the method further includes entering four sub-states of grid-connected standby, grid-connected power supply, off-grid standby and off-grid power supply according to the grid state and the key state:

[0029] If there is electricity in the grid and the power button is pressed, the system will enter the grid-connected power supply state;

[0030] If the grid has electricity and the power button pops up, it will enter the grid-connected standby state;

[0031] If there is no power grid and the power button is pressed, it will enter the off-grid power supply state;

[0032] If there is no power grid and the power button pops up, it will enter the off-grid standby state.

[0033] In an exemplary embodiment of the present disclosure, the method further includes:

[0034] The system cycles between the startup state and the continuous operation state during normal operation, and enters other states according to the status of the power button and the power off button. In the cycle between the startup state and the continuous operation state, the battery is charged and discharged. The charging power is dynamically adjusted according to the battery's allowable charging power. The PCS and the photovoltaic controller provide power for battery charging and perform dynamic balance.

[0035] When in grid-connected standby mode, the battery is charged by PCS and photovoltaic controller, and no external power is supplied;

[0036] When connected to the grid for power supply, PCS and photovoltaic controller are used to charge the battery and supply power to the outside at the same time. The upper limit of the battery charging power is dynamically adjusted according to the load power. When there is no excess power to charge the battery, the greater the load power, the smaller the charging power.

[0037] When off-grid, the battery is charged by a photovoltaic controller, and the charging power is limited to the battery's allowable charging power;

[0038] When the power is off-grid, the battery and photovoltaic controller provide power to the load after being inverted by the PCS.

[0039] In an exemplary embodiment of the present disclosure, the method further includes:

[0040] Battery maintenance status: when the system is just powered on, it determines whether maintenance charging is required based on the battery reporting information. If the battery needs maintenance and there is a power grid, it will jump to the maintenance charging state;

[0041] During maintenance charging, the battery is maintained and charged through the PCS. If the power supply is pressed or the grid is disconnected, the maintenance charging state is interrupted and the normal standby start state is entered.

[0042] In an exemplary embodiment of the present disclosure, the method further includes:

[0043] Fault standby state: In any state, as long as any device is detected to have an irreversible fault, it will immediately enter the fault standby state, in which the PCS and PV controller will be shut down, the fault will be reported and displayed, and the fault recovery or restart can be performed manually.

[0044] In one aspect of the present disclosure, there is provided an electronic device, comprising:

[0045] Processor; and

[0046] A memory having computer-readable instructions stored thereon, wherein the computer-readable instructions, when executed by the processor, implement the method according to any one of the above items.

[0047] In one aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method according to any one of the above items is implemented.

[0048] A control system and control method for microgrid energy management in an exemplary embodiment of the present disclosure. The system includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein: the power module is a 12-60V power input; the CAN communication module is connected to an external energy storage battery and external communication, and is used to upload operation data and receive control instructions; the RS485 communication module is connected to an energy storage inverter and a photovoltaic controller, and is used to send control instructions and receive status data; the display module is an OLED screen of a preset size, and is used to display the status data of the energy management system and human-computer interaction; the DIDO module is connected to a keypad; and the storage module records the data historically. The present disclosure implements energy management logic stratification through a state machine, effectively realizes battery energy storage management control, and reasonably allocates hardware communication resources, and has good hardware platform adaptability.

[0049] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0051] Figure 1 A schematic block diagram of a control system for microgrid energy management according to an exemplary embodiment of the present disclosure is shown;

[0052] Figure 2 A flow chart of a control method for microgrid energy management according to an exemplary embodiment of the present disclosure is shown;

[0053] Figure 3 A logic flow chart of a control method for microgrid energy management according to an exemplary embodiment of the present disclosure is shown;

[0054] Figure 4 A block diagram schematically shows an electronic device according to an exemplary embodiment of the present disclosure;

[0055] Figure 5 A schematic diagram of a computer-readable storage medium according to an exemplary embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0057] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, devices, steps, etc. may be adopted. In other cases, known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0058] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or these functional entities or parts of functional entities may be implemented in one or more software hardened modules, or these functional entities may be implemented in different networks and / or processor devices and / or microcontroller devices.

[0059] In this exemplary embodiment, a control method for microgrid energy management is first provided; Figure 1 As shown in, the control system of the microgrid energy management includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein:

[0060] The power module has a 12-60V power input;

[0061] The CAN communication module connects the external energy storage battery and external communication to upload operation data and receive control instructions;

[0062] The RS485 communication module connects the energy storage inverter and the photovoltaic controller to send control instructions and receive status data;

[0063] The display module is an OLED screen of preset size, which is used to display the status data of the energy management system and human-computer interaction;

[0064] DIDO module connected to the keypad;

[0065] The storage module records the data historically.

[0066] A control system and control method for microgrid energy management in an exemplary embodiment of the present disclosure. The system includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein: the power module is a 12-60V power input; the CAN communication module is connected to an external energy storage battery and external communication, and is used to upload operation data and receive control instructions; the RS485 communication module is connected to an energy storage inverter and a photovoltaic controller, and is used to send control instructions and receive status data; the display module is an OLED screen of a preset size, and is used to display the status data of the energy management system and human-computer interaction; the DIDO module is connected to a keypad; and the storage module records the data historically. The present disclosure implements energy management logic stratification through a state machine, effectively realizes battery energy storage management control, and reasonably allocates hardware communication resources, and has good hardware platform adaptability.

[0067] Next, a control method for microgrid energy management in this example embodiment will be further described.

[0068] Embodiment 1:

[0069] The control system of microgrid energy management includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein:

[0070] The power module has a 12-60V power input;

[0071] The CAN communication module connects the external energy storage battery and external communication to upload operation data and receive control instructions;

[0072] The RS485 communication module connects the energy storage inverter and the photovoltaic controller to send control instructions and receive status data;

[0073] The display module is an OLED screen of preset size, which is used to display the status data of the energy management system and human-computer interaction;

[0074] DIDO module connected to the keypad;

[0075] The storage module records the data historically.

[0076] In the embodiment of this example, the system further comprises:

[0077] The control system EMS of microgrid energy management, photovoltaic controller and energy storage converter PCS constitute the microgrid management unit;

[0078] Each of the microgrid management units is connected to two battery units.

[0079] In the embodiment of this example, the system further comprises:

[0080] The microgrid energy management control system EMS regulates the energy storage converter PCS and photovoltaic controller module to manage the battery charge and discharge reasonably, realizing the mobile power supply function.

[0081] In the embodiment of this example, the microgrid system includes 1 microgrid management unit and 2 battery units. The battery unit provides a 48V DC bus in parallel to power the microgrid management unit. The microgrid unit is equipped with a photovoltaic controller, a PCS and an EMS controller for photovoltaic power generation, energy storage and power conversion. It includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module. The PCS and photovoltaic controller modules are regulated by the EMS controller to reasonably manage the battery's charge and discharge, making it a mobile power source.

[0082] In the embodiment of this example, the control system is a hardware design part with EMS as the core, and the control method is a software program design part; wherein the control system includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module. Figure 1 As shown, the power module is a 12 to 60 volt power input; the CAN communication module is connected to the external energy storage battery and external communication, and is used to upload operation data and receive control instructions; the RS485 communication module is connected to the energy storage inverter and the photovoltaic controller, and is used to send control instructions and receive status data; the display module is a 0.96-inch OLED screen, which is used to display the status data of the energy management system and human-computer interaction; the DIDO module is connected to the keypad; the storage module records the data historically; the present invention can perform energy management control on the equipment of the commonly used microgrid system to ensure the normal operation of the entire microgrid system, and can be adapted to various types of microgrid equipment systems, with the advantages of easy installation, good adaptability and small size.

[0083] It should be noted that although several modules or units of a control system for microgrid energy management are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0084] In addition, in this exemplary embodiment, a control method for microgrid energy management is also provided. Figure 2 As shown, the control method of microgrid energy management includes:

[0085] After the EMS is powered on, it enters the power-on default state, assigns default values ​​to key data, assigns default values ​​to status bit data, and then jumps the state machine to the initialization state;

[0086] In the initialization state, the state or mode of the flag bit, button module, PCS, BMS and photovoltaic controller are initialized, and the state or mode is jumped to the power-off state or standby detection state according to the conditions;

[0087] If normal, it will jump to the standby detection state. In the standby detection state, it will determine whether the battery needs maintenance and charging, and detect whether the switch button state enters the power-off state;

[0088] If normal, it will jump to the startup state. In the startup state, it will start the PV controller and PCS according to different conditions. It will also determine whether to enter the fault standby state and power-off state.

[0089] After each module starts normally in the startup operation state, it jumps to the continuous operation state;

[0090] Power-off state: In any state, as long as the power-on button is detected to be popped up, the power-off state is immediately entered. In this state, the PCS and photovoltaic controller are turned off first, and finally the battery is turned off to complete the power-off.

[0091] In the embodiment of this example, the continuous operation state of the method also includes entering four sub-states of grid-connected standby, grid-connected power supply, off-grid standby and off-grid power supply according to the grid state and the key state:

[0092] If there is electricity in the grid and the power button is pressed, the system will enter the grid-connected power supply state;

[0093] If the grid has electricity and the power button pops up, it will enter the grid-connected standby state;

[0094] If there is no power grid and the power button is pressed, it will enter the off-grid power supply state;

[0095] If there is no power grid and the power button pops up, it will enter the off-grid standby state.

[0096] In the embodiment of this example, the method further comprises:

[0097] The system cycles between the startup state and the continuous operation state during normal operation, and enters other states according to the status of the power button and the power off button. In the cycle between the startup state and the continuous operation state, the battery is charged and discharged. The charging power is dynamically adjusted according to the battery's allowable charging power. The PCS and the photovoltaic controller provide power for battery charging and perform dynamic balance.

[0098] When in grid-connected standby mode, the battery is charged by PCS and photovoltaic controller, and no external power is supplied;

[0099] When connected to the grid for power supply, PCS and photovoltaic controller are used to charge the battery and supply power to the outside at the same time. The upper limit of the battery charging power is dynamically adjusted according to the load power. When there is no excess power to charge the battery, the greater the load power, the smaller the charging power.

[0100] When off-grid, the battery is charged by a photovoltaic controller, and the charging power is limited to the battery's allowable charging power;

[0101] When the power is off-grid, the battery and photovoltaic controller provide power to the load after being inverted by the PCS.

[0102] In the embodiment of this example, the method further comprises:

[0103] Battery maintenance status: when the system is just powered on, it determines whether maintenance charging is required based on the battery reporting information. If the battery needs maintenance and there is a power grid, it will jump to the maintenance charging state;

[0104] During maintenance charging, the battery is maintained and charged through the PCS. If the power supply is pressed or the grid is disconnected, the maintenance charging state is interrupted and the normal standby start state is entered.

[0105] In the embodiment of this example, the method further comprises:

[0106] Fault standby state: In any state, as long as any device is detected to have an irreversible fault, it will immediately enter the fault standby state, in which the PCS and PV controller will be shut down, the fault will be reported and displayed, and the fault recovery or restart can be performed manually.

[0107] Embodiment 2:

[0108] like Figure 3 As shown, in the embodiment of this example, the state machine as a whole has the following states: power-on default state, initialization state, standby detection state, startup operation state, continuous operation state, power-off state, fault standby state and battery maintenance state. Among them, there are four sub-states for the continuous operation state: grid-connected standby, grid-connected power supply, off-grid standby and off-grid power supply.

[0109] After the EMS is powered on, it enters the power-on default state, assigns default values ​​to key data, assigns default values ​​to status bit data, and then jumps the state machine to the initialization state; in the initialization state, the state or mode of the flag bit, key module, PCS, BMS and photovoltaic controller are initialized, and jumps to the power-off state or standby detection state according to the conditions;

[0110] If normal, it will jump to the standby detection state, in which it will determine whether the battery needs maintenance and charging, and detect whether the switch button status has entered the power-off state; if normal, it will jump to the startup operation state, in which it will start the photovoltaic controller and PCS according to different conditions, and also determine whether it has entered the fault standby state and the power-off state. After each device starts normally in the startup operation state, it will jump to the continuous operation state; in the continuous operation state, it will enter the four sub-states of grid-connected standby, grid-connected power supply, off-grid standby and off-grid power supply according to the grid status and button status. If there is electricity in the grid and the power supply button is pressed, it will enter the grid-connected power supply state. If there is electricity in the grid and the power supply button pops up, it will enter the grid-connected standby state. If there is no grid and the power supply button is pressed, it will enter the off-grid power supply state. If there is no grid and the power supply button pops up, it will enter the off-grid standby state;

[0111] When the system is operating normally, it cycles between the startup operation state and the continuous operation state, and enters other states according to the status of the power button and the power off button. In this cycle state, the battery is charged and discharged. The charging power is dynamically adjusted according to the allowable charging power of the battery. The PCS and photovoltaic controller provide power for battery charging and perform dynamic balance. When in grid-connected standby mode, the PCS and photovoltaic controller are used to charge the battery, and no external power is supplied; when grid-connected power is supplied, the PCS and photovoltaic controller are used to charge the battery and supply power to the outside at the same time. According to the load power size, the upper limit of the battery charging power is dynamically adjusted. When there is no excess power to charge the battery, the greater the load power, the smaller the charging power; when off-grid standby mode, the photovoltaic controller is used to charge the battery, and the charging power is limited to the allowable charging power of the battery; when off-grid power is supplied, the battery and photovoltaic controller provide power to supply power to the load after being inverted by the PCS;

[0112] Battery maintenance status: when the system is just powered on, it is determined whether maintenance charging is required based on the battery reporting information. If the battery needs maintenance and there is a power grid, it will jump to the maintenance charging status. During maintenance charging, the battery is maintained and charged through the PCS. If the power supply is pressed or the power grid is disconnected, the maintenance charging status will be interrupted and the system will enter the normal standby startup status.

[0113] Fault standby state: In any state, as long as any device is detected to have an irreversible fault, it will immediately enter the fault standby state, in which the PCS and PV controller will be shut down, the fault will be reported and displayed, and the fault recovery or restart can be performed manually.

[0114] Power-off state: In any state, as long as the power-on button is detected to be popped up, the power-off state is immediately entered. In this state, the PCS and photovoltaic controller are turned off first, and finally the battery is turned off to complete the power-off.

[0115] It should be noted that, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0116] In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

[0117] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as systems, methods or program products. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: complete hardware embodiments, complete software embodiments (including firmware, microcode, etc.), or embodiments combining hardware and software aspects, which may be collectively referred to herein as "circuits", "modules" or "systems".

[0118] Refer to the following Figure 4 An electronic device 500 according to such an embodiment of the present invention is described. Figure 4 The electronic device 500 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0119] like Figure 4 As shown, the electronic device 500 is in the form of a general computing device. The components of the electronic device 500 may include but are not limited to: at least one processing unit 510, at least one storage unit 520, a bus 530 connecting different system components (including the storage unit 520 and the processing unit 510), and a display unit 540.

[0120] The storage unit stores program codes, which can be executed by the processing unit 510, so that the processing unit 510 performs the steps according to various exemplary embodiments of the present invention described in the above “Exemplary Method” section of this specification. For example, the processing unit 510 can perform the following steps: Figure 1 Steps S110 to S160 shown in FIG.

[0121] The storage unit 520 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 5201 and / or a cache storage unit 5202 , and may further include a read-only storage unit (ROM) 5203 .

[0122] The storage unit 520 may also include a program / utility 5204 having a set (at least one) of program modules 5205, such program modules 5205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0123] Bus 530 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0124] The electronic device 500 may also communicate with one or more external devices 570 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 500, and / or may communicate with any device that enables the electronic device 500 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 550. Furthermore, the electronic device 500 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 560. As shown, the network adapter 560 communicates with other modules of the electronic device 500 via a bus 530. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 500, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0125] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the embodiment of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiment of the present disclosure.

[0126] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible embodiments, various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to perform the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.

[0127] refer to Figure 5 As shown, a program product 600 for implementing the above method according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0128] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0129] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0130] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0131] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0132] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0133] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0134] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A control system for microgrid energy management, characterized in that: The system includes a power module, a CAN communication module, an RS485 communication module, a display module, a DIDO module, and a storage module, wherein: The power module has a 12-60V power input; The CAN communication module connects the external energy storage battery and external communication, and is used to upload operation data and receive control instructions; The RS485 communication module connects the energy storage inverter and the photovoltaic controller to send control instructions and receive status data; The display module is an OLED screen of preset size, which is used to display the status data of the energy management system and human-computer interaction; DIDO module connected to the keypad; The storage module records the data historically.

2. The method according to claim 1, characterized in that The system further comprises: The control system EMS of microgrid energy management, photovoltaic controller and energy storage converter PCS constitute the microgrid management unit; Each of the microgrid management units is connected to two battery units.

3. The method according to claim 2, characterized in that The system further comprises: The microgrid energy management control system EMS regulates the energy storage converter PCS and photovoltaic controller module to manage the battery charge and discharge reasonably, realizing the mobile power supply function.

4. A control method for microgrid energy management, characterized in that: The method comprises: After the EMS is powered on, it enters the power-on default state, assigns default values ​​to key data, assigns default values ​​to status bit data, and then jumps the state machine to the initialization state; In the initialization state, the state or mode of the flag bit, button module, PCS, BMS and photovoltaic controller are initialized, and the state or mode is jumped to the power-off state or standby detection state according to the conditions; If normal, it will jump to the standby detection state. In the standby detection state, it will determine whether the battery needs maintenance and charging, and detect whether the switch button state enters the power-off state; If normal, it will jump to the startup state. In the startup state, it will start the PV controller and PCS according to different conditions. It will also determine whether to enter the fault standby state and power-off state. After each module starts normally in the startup operation state, it jumps to the continuous operation state; Power-off state: In any state, as long as the power-on button is detected to be popped up, the power-off state is immediately entered. In this state, the PCS and photovoltaic controller are turned off first, and finally the battery is turned off to complete the power-off.

5. The method according to claim 4, characterized in that The continuous operation state of the method also includes entering four sub-states of grid-connected standby, grid-connected power supply, off-grid standby and off-grid power supply according to the grid state and the key state: If there is electricity in the grid and the power button is pressed, the system will enter the grid-connected power supply state; If the grid has electricity and the power button pops up, it will enter the grid-connected standby state; If there is no power grid and the power button is pressed, it will enter the off-grid power supply state; If there is no power grid and the power button pops up, it will enter the off-grid standby state.

6. The method according to claim 5, characterized in that The method further comprises: The system cycles between the startup state and the continuous operation state during normal operation, and enters other states according to the status of the power button and the power off button. In the cycle between the startup state and the continuous operation state, the battery is charged and discharged. The charging power is dynamically adjusted according to the battery's allowable charging power. The PCS and the photovoltaic controller provide power for battery charging and perform dynamic balance. When in grid-connected standby mode, the battery is charged by PCS and photovoltaic controller, and no external power is supplied; When connected to the grid for power supply, PCS and photovoltaic controller are used to charge the battery and supply power to the outside at the same time. The upper limit of the battery charging power is dynamically adjusted according to the load power. When there is no excess power to charge the battery, the greater the load power, the smaller the charging power. When off-grid, the photovoltaic controller is used to charge the battery, and the charging power is limited to the battery's allowable charging power; When the power is off-grid, the battery and photovoltaic controller provide power to the load after being inverted by the PCS.

7. The method according to claim 4, characterized in that The method further comprises: Battery maintenance status: when the system is just powered on, it determines whether maintenance charging is required based on the battery reporting information. If the battery needs maintenance and there is a power grid, it will jump to the maintenance charging state; During maintenance charging, the battery is maintained and charged through the PCS. If the power supply is pressed or the power grid is disconnected, the maintenance charging state is interrupted and the normal standby start state is entered.

8. The method according to claim 4, characterized in that The method further comprises: Fault standby state: In any state, as long as any device is detected to have an irreversible fault, it will immediately enter the fault standby state, in which the PCS and PV controller will be shut down, the fault will be reported and displayed, and the fault recovery or restart can be performed manually.

9. An electronic device, characterized in that: include Processor; and A memory having computer-readable instructions stored thereon, wherein the computer-readable instructions, when executed by the processor, implement the method according to any one of claims 4 to 8.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the method according to any one of claims 4 to 8 is implemented.

Images