Networking method, device and equipment of grid-connected integrated cabinet energy storage system, storage medium and product

Abstract

The invention discloses a networking method, device and equipment of a grid-connected integrated cabinet energy storage system, a storage medium and a product, and relates to the technical field of communication, the method comprises the following steps: when it is detected that the grid-connected integrated cabinet energy storage system is started, system configuration of the grid-connected integrated cabinet energy storage system is obtained, the grid-connected integrated cabinet energy storage system comprises an energy storage cabinet, and the energy storage cabinet is connected with the grid-connected integrated cabinet; the energy storage cabinet comprises a main cabinet and an auxiliary cabinet; and if the energy storage cabinets in the grid-connected integrated cabinet energy storage system are judged to be in a cabinet combination mode according to the system configuration, connecting the slave cabinets to a local area network of the master cabinet through the MQTT server, and creating an MQTT internal network machine and an MQTT external network machine in the master cabinet so as to perform networking on the grid-connected integrated cabinet energy storage system. According to the invention, networking is carried out on the grid-connected integrated cabinet energy storage system, so that the data interaction effect among the slave cabinet, the master cabinet and the cloud platform in the energy storage system can be well ensured under the scene of parallel connection of multiple energy storage cabinets, and the operation stability and reliability of a power grid system are improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a networking method, device, equipment, storage medium and product for a grid-connected integrated cabinet energy storage system. Background Art

[0002] With the increasing number of electricity users and electricity consumption, the power grid system needs to meet the real-time balance of power supply and load, which brings great challenges to the safe and stable operation of the power grid system and the application of various forms of electricity.

[0003] Traditional technologies can be applied to the power grid through large-capacity and efficient energy storage systems (such as grid-connected integrated cabinet energy storage systems), thereby smoothing fluctuations and improving the stability and reliability of power grid operation. However, since grid-connected integrated cabinet energy storage systems often contain a variety of power electronic equipment, how to reasonably network the grid-connected integrated cabinet energy storage system to improve the data interaction effect of the energy storage system, thereby further improving the stability and reliability of the power grid system operation, has become an important research direction in the industry. Summary of the invention

[0004] The main purpose of this application is to provide a networking method, device, equipment, storage medium and product for a grid-connected integrated cabinet energy storage system, aiming to solve the technical problem of how to reasonably network the grid-connected integrated cabinet energy storage system to improve the data interaction effect of the energy storage system.

[0005] To achieve the above object, the present application provides a networking method for a grid-connected integrated cabinet energy storage system, the method comprising the following steps:

[0006] When it is detected that the grid-connected integrated cabinet energy storage system is turned on, the system configuration of the grid-connected integrated cabinet energy storage system is obtained, wherein the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet;

[0007] If it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in a cabinet-connected mode, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT extranet machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system.

[0008] In one embodiment, the master cabinet establishes a two-way communication channel with the slave cabinet through the MQTT intranet machine, and the master cabinet establishes a two-way communication channel with the cloud platform through the MQTT extranet machine;

[0009] There is an internal transparent transmission channel between the MQTT intranet machine and the MQTT external network machine. The MQTT intranet machine transparently transmits the message sent by the cloud platform to the MQTT external network machine to the slave cabinet through the internal transparent transmission channel, and the MQTT external network machine transparently transmits the message sent by the slave cabinet to the MQTT intranet machine to the cloud platform through the internal transparent transmission channel.

[0010] To achieve the above-mentioned purpose, the present application provides a grid-connected integrated cabinet energy storage system, which is used to carry out photovoltaic absorption, peak shaving and valley filling, and dynamic capacity expansion of the power grid system;

[0011] The grid-connected integrated cabinet energy storage system includes an energy storage cabinet, an energy storage battery system, an energy storage converter system, a temperature and humidity control system, a lighting system, a fire protection system and an EMS system;

[0012] The energy storage cabinet is used for multiple machines and is equipped with an automatic fire alarm and automatic fire extinguishing system, an intelligent temperature and humidity adjustment system and an open Ethernet interface;

[0013] The energy storage cabinet is controlled by the EMS system, which is designed based on the Linux system and is used to send the collected energy storage cabinet information to the cloud platform, so that the cloud platform can control the energy storage cabinet according to the energy storage cabinet information.

[0014] In one embodiment, the energy storage cabinet includes a master cabinet and a slave cabinet;

[0015] The master cabinet is used to issue control instructions to the power grid system and the slave cabinet according to the collected energy storage cabinet data and the gateway table data of the power grid system, and the slave cabinet is used to transparently transmit data and accept the scheduling of the master cabinet;

[0016] The main cabinet is also equipped with a station control level EMS device, and the station control level EMS device is used to receive the power on / off instructions, PCS remote control and adjustment instructions and air conditioning configuration instructions issued by the slave cabinet.

[0017] In one embodiment, the working mode of the main cabinet includes a debugging mode and an automatic mode, wherein the debugging mode is used to debug the grid-connected integrated cabinet energy storage system, and the automatic mode is used to perform photovoltaic consumption, peak shaving and valley filling, and dynamic capacity expansion on the power grid system;

[0018] When the working mode of the main cabinet is the debugging mode, the main cabinet is used to control the power on / off, active / reactive power delivery and charging and discharging status display of the energy storage cabinet;

[0019] When the working mode of the main cabinet is the automatic mode, the main cabinet is used to control the power on / off, anti-backflow prohibition state and anti-backflow enabling state of the energy storage cabinet.

[0020] In one embodiment, the anti-backflow prohibited state is applicable to the scenario where the gateway table data in the power grid system cannot be uploaded to the station control level EMS device, and the anti-backflow enabled state is applicable to the scenario where the gateway table data in the power grid system can be uploaded to the station control level EMS device.

[0021] In addition, to achieve the above-mentioned purpose, the present application also proposes a networking device of a grid-connected integrated cabinet energy storage system, the networking device of the grid-connected integrated cabinet energy storage system comprising:

[0022] An information acquisition module, used for acquiring the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on, wherein the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet;

[0023] The system networking module is used to connect the slave cabinet to the local area network of the master cabinet through the MQTT server if it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in the cabinet-connected mode, and to create an MQTT intranet machine and an MQTT extranet machine in the master cabinet to network the grid-connected integrated cabinet energy storage system.

[0024] In addition, to achieve the above-mentioned purpose, the present application also proposes a networking device for a grid-connected integrated cabinet energy storage system, the device comprising: a memory, a processor, and a networking program for the grid-connected integrated cabinet energy storage system stored on the memory and executable on the processor, the networking program for the grid-connected integrated cabinet energy storage system being configured to implement the steps of the networking method for the grid-connected integrated cabinet energy storage system as described above.

[0025] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and on which is stored a networking program for a grid-connected integrated cabinet energy storage system. When the networking program for the grid-connected integrated cabinet energy storage system is executed by a processor, the steps of the networking method for the grid-connected integrated cabinet energy storage system as described above are implemented.

[0026] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer program product, which includes a networking program for a grid-connected integrated cabinet energy storage system. When the networking program for the grid-connected integrated cabinet energy storage system is executed by a processor, the steps of the networking method for the grid-connected integrated cabinet energy storage system as described above are implemented.

[0027] This application obtains the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on. The grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet; if the energy storage cabinet in the grid-connected integrated cabinet energy storage system is determined to be in a cabinet-connected mode according to the system configuration, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT external network machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system. Since the above method of this application networks the grid-connected integrated cabinet energy storage system through the MQTT server, the MQTT intranet machine and the MQTT external network machine, the data interaction effect between the slave cabinet, the master cabinet and the cloud platform in the energy storage system can be better guaranteed in the scenario of multiple energy storage cabinets being connected in parallel, thereby improving the stability and reliability of the operation of the power grid system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of the networking equipment of the grid-connected integrated cabinet energy storage system in the hardware operating environment involved in the embodiment of the present application;

[0029] Figure 2 A schematic diagram of the flow chart of the first embodiment of the networking method of the grid-connected integrated cabinet energy storage system of the present application;

[0030] Figure 3 A schematic diagram of the networking relationship in the networking method of the grid-connected integrated cabinet energy storage system of this application;

[0031] Figure 4 A flow chart of a second embodiment of a networking method for a grid-connected integrated cabinet energy storage system of the present application;

[0032] Figure 5 This is a structural block diagram of the first embodiment of the networking device of the grid-connected integrated cabinet energy storage system of the present application.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] Reference Figure 1 , Figure 1 This is a schematic diagram of the networking equipment structure of a grid-connected integrated cabinet energy storage system in the hardware operating environment involved in the embodiment of the present application.

[0036] like Figure 1As shown, the networking equipment of the grid-connected integrated cabinet energy storage system may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0037] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the networking equipment of the grid-connected integrated cabinet energy storage system, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0038] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a networking program of a grid-connected integrated cabinet energy storage system.

[0039] exist Figure 1 In the networking device of the grid-connected integrated cabinet energy storage system shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the networking device of the grid-connected integrated cabinet energy storage system of the present application can be set in the networking device of the grid-connected integrated cabinet energy storage system, and the networking device of the grid-connected integrated cabinet energy storage system calls the networking program of the grid-connected integrated cabinet energy storage system stored in the memory 1005 through the processor 1001, and executes the networking method of the grid-connected integrated cabinet energy storage system provided in the embodiment of the present application.

[0040] The present application embodiment provides a networking method for a grid-connected integrated cabinet energy storage system, referring to Figure 2 , Figure 2 This is a flow chart of the first embodiment of the networking method of the grid-connected integrated cabinet energy storage system of the present application.

[0041] In this embodiment, the networking method of the grid-connected integrated cabinet energy storage system includes the following steps:

[0042] Step S10: when it is detected that the grid-connected integrated cabinet energy storage system is turned on, the system configuration of the grid-connected integrated cabinet energy storage system is obtained, the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet.

[0043] It should be noted that the execution subject of the method of this embodiment can be a terminal device with system networking, data processing and program running functions, such as an intelligent terminal, a computer, etc., or an electronic device with the same or similar functions, such as the networking device of the above-mentioned grid-connected integrated cabinet energy storage system. The networking device of the grid-connected integrated cabinet energy storage system (hereinafter referred to as the networking device) is used as an example to illustrate this embodiment and the following embodiments.

[0044] It is understandable that the above-mentioned grid-connected integrated cabinet energy storage system can be an air-cooled grid-connected integrated cabinet energy storage system, which can effectively achieve certain economic benefits through peak shaving and valley filling, dynamic capacity expansion, demand-side response and other methods. The air-cooled grid-connected integrated cabinet energy storage system mainly works in the grid-connected mode, and has multiple functional requirements such as photovoltaic absorption, peak shaving and valley filling, dynamic capacity expansion, etc. At the current stage, the peak shaving and valley filling function is developed first. The energy storage cabinet will act as a battery energy storage system to store electrical energy and release it for load use when needed. This will not only help improve the stability and reliability of power supply, but also reduce dependence on traditional fossil fuels, reduce carbon emissions and promote sustainable development.

[0045] It should be understood that the energy storage system has been regarded as an important part of the six major links of "collection-generation-transmission-distribution-use-storage" in the operation of the power grid. After the energy storage link is introduced into the power grid system, demand-side management can be effectively carried out, the peak and valley difference between day and night can be eliminated, and the load can be smoothed. Not only can the power equipment be used more effectively and the power supply cost can be reduced, but it can also be used as a means to improve the stability of system operation, adjust the frequency, and compensate for load fluctuations. Therefore, the use of energy storage technology in the power field has great strategic significance. The grid-connected integrated cabinet energy storage system in this embodiment is connected in series and parallel by high-energy, low-cost, safe and pollution-free LFP (Lithium Iron Phosphate) energy storage battery units, and is configured with advanced battery management systems, high-performance bidirectional converters, temperature and humidity control systems, fire protection systems, etc., with the advantages of flexibility, reliability, and easy expansion and upgrading.

[0046] In the specific implementation, the EMS (Energy Management System) software of the air-cooled grid-connected integrated cabinet master cabinet can be used to detect whether the grid-connected integrated cabinet energy storage system is turned on and obtain the system configuration of the grid-connected integrated cabinet energy storage system. The EMS software of the air-cooled grid-connected integrated cabinet master cabinet is an EMS master cabinet software designed based on the Linux system. Its main function is to collect and remotely control the information of each slave cabinet under it, and transmit the information to the cloud platform through the MQTT protocol (Message Queuing TelemetryTransport). The cloud platform can also remotely control each slave cabinet through the master cabinet and support remote upgrade functions. The master cabinet can also connect to the display screen through the MODBUS TCP protocol to collect and remotely control the master cabinet and each slave cabinet.

[0047] Step S20: If it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in a cabinet-connected mode, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT extranet machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system.

[0048] It should be noted that the master cabinet establishes a two-way communication channel with the slave cabinet through the MQTT intranet machine, and the master cabinet establishes a two-way communication channel with the cloud platform through the MQTT extranet machine.

[0049] It should be understood that there is an internal transparent transmission channel between the MQTT intranet machine and the MQTT external network machine. The MQTT intranet machine transparently transmits the message sent by the cloud platform to the MQTT external network machine to the slave cabinet through the internal transparent transmission channel, and the MQTT external network machine transparently transmits the message sent by the slave cabinet to the MQTT intranet machine to the cloud platform through the internal transparent transmission channel.

[0050] In the specific implementation, you can refer to Figure 3 , Figure 3 This is a schematic diagram of the networking relationship in the networking method of the grid-connected integrated cabinet energy storage system of this application. Figure 3In the example, the slave cabinet is connected to the local LAN of the master cabinet, and the account login information is provided by the local MQTT server. The IP address and port of the master cabinet are set on the screen. The subject uses the product name and device name provided in the site information. An "MQTT intranet machine" client will be created on the master cabinet. The master cabinet will extract the subject from the site information (the site information can be exported from the cloud platform to record the connection information of the MQTT client) and establish a two-way communication channel with all slave cabinets. An "MQTT extranet machine" will also be created in the master cabinet to connect to the cloud platform. Similarly, through the two-way communication channel between the subject of the site information and the cloud platform, the system will internally transmit the collected data of the "MQTT intranet machine" to the "MQTT extranet machine", and communicate with the cloud platform through the "MQTT extranet machine". Similarly, the cloud platform publishes information to the "MQTT extranet machine" and then forwards it to the slave cabinet through the "MQTT intranet machine". In particular, the MQTT login information consists of the domain name, port, user name, password, and client ID, which is used to connect to the MQTT server. The topic information consists of the product name and device name, which identifies the uniqueness. It can publish and subscribe, that is, two-way data. The master cabinet can collect the BMS (Battery Management System) data, PCS (Power Conversion System) data, electric meter, environmental control, air conditioning, alarm and other data from the slave cabinet.

[0051] In particular, the energy storage cabinets in the grid-connected integrated cabinet energy storage system include single cabinet mode and combined cabinet mode. In the single cabinet mode, the corresponding site information can be matched according to the system address to directly connect to the cloud platform; in the combined cabinet mode, the internal fixed login information can be taken according to the system address to connect to the main cabinet, and the device name in the site information is taken as the sn unique identifier, which will be transmitted to the platform through the main cabinet along with the data. The MQTT intranet will monitor all slave cabinet data based on the information in the site information and upload it to the platform through the MQTT external network.

[0052] This embodiment obtains the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on. The grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet; if the energy storage cabinet in the grid-connected integrated cabinet energy storage system is determined to be in a cabinet-connected mode according to the system configuration, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT external network machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system. Since the above method of this embodiment networks the grid-connected integrated cabinet energy storage system through the MQTT server, the MQTT intranet machine and the MQTT external network machine, the data interaction effect between the slave cabinet, the master cabinet and the cloud platform in the energy storage system can be better guaranteed in the scenario of multiple energy storage cabinets being connected in parallel, thereby improving the stability and reliability of the operation of the power grid system.

[0053] The present application also provides a grid-connected integrated cabinet energy storage system, referring to Figure 4 , Figure 4 This is a schematic diagram of a first embodiment of a grid-connected integrated cabinet energy storage system of the present application.

[0054] In a feasible implementation, the grid-connected integrated cabinet energy storage system is used to carry out photovoltaic absorption, peak shaving and valley filling, and dynamic capacity expansion of the power grid system.

[0055] In a feasible implementation manner, the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, an energy storage battery system, an energy storage converter system, a temperature and humidity control system, a lighting system, a fire protection system and an EMS system.

[0056] In a feasible implementation, the energy storage cabinet is used for multiple machines and is equipped with an automatic fire alarm and automatic fire extinguishing system, an intelligent temperature and humidity control system, and an open Ethernet interface.

[0057] In a feasible implementation, the energy storage cabinet is controlled by the EMS system, and the EMS system is designed based on the Linux system and is used to send the collected energy storage cabinet information to the cloud platform, so that the cloud platform can control the energy storage cabinet according to the energy storage cabinet information.

[0058] In a feasible implementation, the energy storage cabinet includes a master cabinet and a slave cabinet; the master cabinet is used to issue control instructions to the power grid system and the slave cabinet according to the collected energy storage cabinet data and the gateway table data of the power grid system, and the slave cabinet is used to transparently transmit data and accept the scheduling of the master cabinet; the main cabinet is also equipped with a station control-level EMS device, and the station control-level EMS device is used to receive the power on and off instructions, PCS remote control and adjustment instructions and air conditioning configuration instructions issued by the slave cabinet.

[0059] It is understandable that in the master cabinet mode, the number of online slave cabinets needs to be determined in real time in order to evenly share power during charging and discharging. When the energy storage system is first put into use, it will prompt you to enter the number of slave cabinets in the current system as m. At any time during operation, if one or several slave cabinets exit due to a fault, the actual number of online cabinets should be m-the number of exited cabinets. The maximum charging power and maximum discharging power requested by the BMS should be based on the sum of the maximum requested power of the online slave cabinets. If a slave cabinet is in an exited state, the maximum requested power of the slave cabinet will not be added.

[0060] In the specific implementation, when multiple cabinets are used in parallel, all energy storage cabinets are set to slave cabinet mode, and a station control-level EMS device is also equipped, installed in a slave cabinet and defined as the master cabinet. The slave cabinet runs in slave cabinet mode, uploads the data in the system to the station control-level EMS controller of the master cabinet, and opens the power on / off instructions, PCS remote control instructions, air conditioning configuration instructions, etc. to the master EMS; in addition to collecting data in the cabinet and issuing instructions, the master cabinet also issues control instructions to the slave cabinet according to the data execution strategy of the collection gateway table. When cloud control is used, all energy storage cabinets are slave cabinets, and data is uploaded to the cloud through the controller 4G module and is subject to cloud scheduling management. Cloud control and local control can be carried out simultaneously without priority distinction, and the latest instruction arriving at the device shall prevail.

[0061] In a feasible implementation manner, the working mode of the main cabinet includes a debugging mode and an automatic mode, the debugging mode is used to debug the grid-connected integrated cabinet energy storage system, and the automatic mode is used to perform photovoltaic absorption, peak shaving and valley filling, and dynamic capacity expansion of the power grid system; when the working mode of the main cabinet is the debugging mode, the main cabinet is used to control the power on / off, active / reactive power delivery, and charging and discharging status display of the energy storage cabinet; when the working mode of the main cabinet is the automatic mode, the main cabinet is used to control the power on / off, anti-backflow prohibition state, and anti-backflow enabling state of the energy storage cabinet.

[0062] In the specific implementation, there are two modes designed in the main cabinet mode, namely automatic mode and debugging mode. The automatic mode is divided into anti-backflow prohibition and anti-backflow enablement according to whether the gateway table data can be uploaded. When the gateway table data cannot be uploaded, choose to use anti-backflow prohibition, and execute according to the set time period and charging and discharging power; when the gateway table data can be uploaded, choose to use anti-backflow enablement, and execute according to the set time period, charging and discharging status, and calculated power. The debugging mode is relatively simple and is only used for occasional debugging. There is no built-in functional logic, and it can realize the basic functions of power on and off and charging and discharging.

[0063] In a feasible implementation, the anti-backflow prohibited state is applicable to the scenario where the gateway table data in the power grid system cannot be uploaded to the station control level EMS device, and the anti-backflow enabled state is applicable to the scenario where the gateway table data in the power grid system can be uploaded to the station control level EMS device.

[0064] In the specific implementation, the EMS system should have the function of power-on self-start. After the EMS is powered on, it should perform a power-on self-test to confirm that the battery system is in normal and fault-free status, the PCS system is in normal and fault-free status, and the environmental control system is in normal and fault-free status. After the high voltage on the DC side is completed, the local operation screen and the cloud add a start-stop button. After confirming the button start, the PCS is controlled to start. After the EMS is powered off and then powered on again, the current parameter configuration and mode are the most recent settings. When an alarm signal appears in the environmental control system, each slave cabinet performs logical actions according to its actual situation and uploads the signal to the main controller, which is then uploaded to the cloud platform. The fault caused by a single slave cabinet does not affect other slave cabinets, nor does it affect the normal operation of the energy storage system. When the main controller loses communication with each slave cabinet: (1) report to the cloud platform; (2) delay 1 minute, and the slave cabinet controller controls the slave cabinet to shut down; (3) after communication is restored to normal, the system resumes normal operation. When the EMS main controller loses communication with the gateway meter: (1) EMS reports to the cloud platform; (2) After a delay of 1 minute, the EMS sends a power value of 0 to all slave cabinet PCSs and stops charging and discharging; (3) After communication is restored to normal, the system resumes normal operation. When the EMS loses communication with the energy storage side meter: (1) EMS reports to the cloud platform; (2) After a delay of 1 minute, when the system is in the "automatic-anti-backflow enable" mode, the EMS sends a power value of 0 to the PCS and stops charging and discharging. When the system is in the debugging mode and the "automatic-anti-backflow disable" mode, no control is performed.

[0065] In addition, when the station-level EMS issues charging or discharging remote adjustment instructions to each slave cabinet, if each slave cabinet partially executes the charging instruction and partially executes the discharging instruction, it is considered that the energy storage system is faulty. After a delay of 1 minute, a remote adjustment instruction with a power of 0 is issued to each slave cabinet. When the fault is eliminated, that is, each slave cabinet executes according to the EMS instruction, the system automatically resumes operation; if the fault is not restored, human intervention is required to solve it. For faults that require manual recovery after being triggered by signals such as fire alarms, fire spraying, emergency stop, and remote adjustment not being executed, a reset function is added to the EMS main interface and program. This function can only be operated after the corresponding fault is eliminated. When performing the reset operation, permission management is required and a password is set. The password can be a general password permission. For alarms, faults and other signals that still exist, even if a reset operation is performed, the shielding should not be actively restored. In order to reduce after-sales costs when power is low, a forced high-voltage instruction is added to the EMS main interface. This instruction operation is associated with the BMS protocol. This operation is risky. When forced to operate on high voltage, after the BMS receives the command, if there is still no power replenishment operation after a certain delay, the BMS should actively protect the low high voltage. At the same time, the BMS should also perform corresponding protection operations based on environmental factors such as low voltage / low temperature / insulation.

[0066] This embodiment proposes a grid-connected integrated cabinet energy storage system, which is used for photovoltaic absorption, peak shaving and valley filling and dynamic expansion of the power grid system; the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, an energy storage battery system, an energy storage converter system, a temperature and humidity control system, a lighting system, a fire protection system and an EMS system; the energy storage cabinet is used for multiple cabinets and is equipped with an automatic fire alarm and automatic fire extinguishing system, an intelligent temperature and humidity adjustment system and an open Ethernet interface; the energy storage cabinet is controlled by the EMS system, and the EMS system is designed based on the Linux system and is used to send the collected energy storage cabinet information to the cloud platform, so that the cloud platform can control the energy storage cabinet according to the energy storage cabinet information. The grid-connected integrated cabinet energy storage system proposed in this embodiment can reduce the peak-to-valley difference of load and improve the utilization rate of power equipment in the scenario of multiple energy storage cabinets in parallel, thereby improving the power supply reliability and improving the power quality, and promoting the development of microgrids and grid frequency modulation.

[0067] In addition, an embodiment of the present application also proposes a storage medium, which stores a networking program of a grid-connected integrated cabinet energy storage system. When the networking program of the grid-connected integrated cabinet energy storage system is executed by a processor, the steps of the networking method of the grid-connected integrated cabinet energy storage system described above are implemented.

[0068] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the networking device of the grid-connected integrated cabinet energy storage system of the present application.

[0069] like Figure 5 As shown, the networking device of the grid-connected integrated cabinet energy storage system proposed in the embodiment of the present application includes:

[0070] The information acquisition module 501 is used to acquire the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on, wherein the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet;

[0071] The system networking module 502 is used to connect the slave cabinet to the local area network of the master cabinet through the MQTT server if it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in a cabinet-connected mode, and to create an MQTT intranet machine and an MQTT extranet machine in the master cabinet to network the grid-connected integrated cabinet energy storage system.

[0072] This embodiment obtains the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on. The grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet; if the energy storage cabinet in the grid-connected integrated cabinet energy storage system is determined to be in a cabinet-connected mode according to the system configuration, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT external network machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system. Since the above method of this embodiment networks the grid-connected integrated cabinet energy storage system through the MQTT server, the MQTT intranet machine and the MQTT external network machine, the data interaction effect between the slave cabinet, the master cabinet and the cloud platform in the energy storage system can be better guaranteed in the scenario of multiple energy storage cabinets being connected in parallel, thereby improving the stability and reliability of the operation of the power grid system.

[0073] Based on the first embodiment of the networking device of the grid-connected integrated cabinet energy storage system of the present application, a second embodiment of the networking device of the grid-connected integrated cabinet energy storage system of the present application is proposed.

[0074] In this embodiment, the master cabinet establishes a two-way communication channel with the slave cabinet through the MQTT intranet machine, and the master cabinet establishes a two-way communication channel with the cloud platform through the MQTT external network machine; there is an internal transparent transmission channel between the MQTT intranet machine and the MQTT external network machine, and the MQTT intranet machine transparently transmits the message sent by the cloud platform to the MQTT external network machine to the slave cabinet through the internal transparent transmission channel, and the MQTT external network machine transparently transmits the message sent by the slave cabinet to the MQTT intranet machine to the cloud platform through the internal transparent transmission channel.

[0075] Furthermore, the grid-connected integrated cabinet energy storage system is used for photovoltaic absorption, peak shaving and valley filling and dynamic capacity expansion of the power grid system; the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, an energy storage battery system, an energy storage inverter system, a temperature and humidity control system, a lighting system, a fire protection system and an EMS system; the energy storage cabinet is used for multi-machine cabinet connection and is equipped with an automatic fire alarm and automatic fire extinguishing system, an intelligent temperature and humidity adjustment system and an open Ethernet interface; the energy storage cabinet is controlled by the EMS system, and the EMS system is designed based on the Linux system and is used to send the collected energy storage cabinet information to the cloud platform, so that the cloud platform can control the energy storage cabinet according to the energy storage cabinet information.

[0076] Furthermore, the energy storage cabinet includes a master cabinet and a slave cabinet; the master cabinet is used to issue control instructions to the power grid system and the slave cabinet according to the collected energy storage cabinet data and the gateway table data of the power grid system, and the slave cabinet is used to transparently transmit data and accept the scheduling of the master cabinet; the main cabinet is also equipped with a station control-level EMS device, and the station control-level EMS device is used to receive the power on and off instructions, PCS remote control and adjustment instructions and air conditioning configuration instructions issued by the slave cabinet.

[0077] Furthermore, the working mode of the main cabinet includes a debugging mode and an automatic mode, the debugging mode is used to debug the grid-connected integrated cabinet energy storage system, and the automatic mode is used to perform photovoltaic absorption, peak shaving and valley filling, and dynamic capacity expansion of the power grid system; when the working mode of the main cabinet is the debugging mode, the main cabinet is used to control the power on / off, active / reactive power delivery, and charging and discharging status display of the energy storage cabinet; when the working mode of the main cabinet is the automatic mode, the main cabinet is used to control the power on / off, anti-backflow prohibition state, and anti-backflow enabling state of the energy storage cabinet.

[0078] Furthermore, the anti-backflow prohibited state is applicable to the scenario where the gateway table data in the power grid system cannot be uploaded to the station control level EMS device, and the anti-backflow enabled state is applicable to the scenario where the gateway table data in the power grid system can be uploaded to the station control level EMS device.

[0079] Other embodiments or specific implementation methods of the networking device of the grid-connected integrated cabinet energy storage system of the present application can refer to the above-mentioned method embodiments, which will not be repeated here.

[0080] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0081] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0082] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0083] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A networking method for a grid-connected integrated cabinet energy storage system, characterized in that: The method comprises the following steps: When it is detected that the grid-connected integrated cabinet energy storage system is turned on, the system configuration of the grid-connected integrated cabinet energy storage system is obtained, wherein the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet; If it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in a cabinet-connected mode, the slave cabinet is connected to the local area network of the master cabinet through the MQTT server, and an MQTT intranet machine and an MQTT extranet machine are created in the master cabinet to network the grid-connected integrated cabinet energy storage system.

2. The networking method of the grid-connected integrated cabinet energy storage system according to claim 1, characterized in that: The master cabinet establishes a two-way communication channel with the slave cabinet through the MQTT intranet machine, and the master cabinet establishes a two-way communication channel with the cloud platform through the MQTT extranet machine; There is an internal transparent transmission channel between the MQTT intranet machine and the MQTT external network machine. The MQTT intranet machine transparently transmits the message sent by the cloud platform to the MQTT external network machine to the slave cabinet through the internal transparent transmission channel, and the MQTT external network machine transparently transmits the message sent by the slave cabinet to the MQTT intranet machine to the cloud platform through the internal transparent transmission channel.

3. A grid-connected integrated cabinet energy storage system, characterized in that: The grid-connected integrated cabinet energy storage system is used to carry out photovoltaic consumption, peak load shifting and valley filling and dynamic capacity expansion of the power grid system; The grid-connected integrated cabinet energy storage system includes an energy storage cabinet, an energy storage battery system, an energy storage converter system, a temperature and humidity control system, a lighting system, a fire protection system and an EMS system; The energy storage cabinet is used for multiple machines and is equipped with an automatic fire alarm and automatic fire extinguishing system, an intelligent temperature and humidity adjustment system and an open Ethernet interface; The energy storage cabinet is controlled by the EMS system, which is designed based on the Linux system and is used to send the collected energy storage cabinet information to the cloud platform, so that the cloud platform can control the energy storage cabinet according to the energy storage cabinet information.

4. The grid-connected integrated cabinet energy storage system according to claim 3, characterized in that: The energy storage cabinet includes a master cabinet and a slave cabinet; The master cabinet is used to issue control instructions to the power grid system and the slave cabinet according to the collected energy storage cabinet data and the gateway table data of the power grid system, and the slave cabinet is used to transparently transmit data and accept the scheduling of the master cabinet; The main cabinet is also equipped with a station control level EMS device, and the station control level EMS device is used to receive the power on / off instructions, PCS remote control and adjustment instructions and air conditioning configuration instructions issued by the slave cabinet.

5. The grid-connected integrated cabinet energy storage system according to claim 4, characterized in that: The working mode of the main cabinet includes a debugging mode and an automatic mode. The debugging mode is used to debug the grid-connected integrated cabinet energy storage system, and the automatic mode is used to perform photovoltaic consumption, peak shaving and valley filling, and dynamic capacity expansion on the power grid system. When the working mode of the main cabinet is the debugging mode, the main cabinet is used to control the power on / off, active / reactive power delivery and charging and discharging status display of the energy storage cabinet; When the working mode of the main cabinet is the automatic mode, the main cabinet is used to control the power on / off, anti-backflow prohibition state and anti-backflow enabling state of the energy storage cabinet.

6. The grid-connected integrated cabinet energy storage system according to claim 5, characterized in that: The anti-backflow prohibited state is applicable to the scenario where the gateway table data in the power grid system cannot be uploaded to the station control level EMS device, and the anti-backflow enabled state is applicable to the scenario where the gateway table data in the power grid system can be uploaded to the station control level EMS device.

7. A networking device for a grid-connected integrated cabinet energy storage system, characterized in that: The networking device of the grid-connected integrated cabinet energy storage system includes: An information acquisition module, used for acquiring the system configuration of the grid-connected integrated cabinet energy storage system when it is detected that the grid-connected integrated cabinet energy storage system is turned on, wherein the grid-connected integrated cabinet energy storage system includes an energy storage cabinet, and the energy storage cabinet includes a master cabinet and a slave cabinet; The system networking module is used to connect the slave cabinet to the local area network of the master cabinet through the MQTT server if it is determined according to the system configuration that the energy storage cabinet in the grid-connected integrated cabinet energy storage system is in the cabinet-connected mode, and to create an MQTT intranet machine and an MQTT extranet machine in the master cabinet to network the grid-connected integrated cabinet energy storage system.

8. A networking device for a grid-connected integrated cabinet energy storage system, characterized in that: The device includes: a memory, a processor, and a networking program of a grid-connected integrated cabinet energy storage system stored in the memory and executable on the processor, wherein the networking program of the grid-connected integrated cabinet energy storage system is configured to implement the steps of the grid-connected integrated cabinet energy storage system as described in any one of claims 1 to 2.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, on which is stored a networking program for a grid-connected integrated cabinet energy storage system. When the networking program for the grid-connected integrated cabinet energy storage system is executed by a processor, the steps of the grid-connected integrated cabinet energy storage system as described in any one of claims 1 to 2 are implemented.

10. A computer program product, characterized in that The computer program product includes a networking program for a grid-connected integrated cabinet energy storage system, and when the networking program for the grid-connected integrated cabinet energy storage system is executed by a processor, the steps of the grid-connected integrated cabinet energy storage system according to any one of claims 1 to 2 are implemented.

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