Transformer area intelligent fusion device with edge calculation

Abstract

The invention relates to the technical field of power distribution Internet of Things, and discloses a transformer area intelligent fusion device with edge calculation, comprising a main control module which is connected with a local communication module, a remote communication module, a debugging serial port, an RTC battery port, an indicating lamp, an RS232 / RS485 change-over switch, an FE network port, a strong current connector and a weak current connector; the remote communication module uploads the data acquired by the acquisition chip to a power distribution master station and an acquisition master station respectively, and the downlink is communicated with equipment; the main control module adopts a real-time embedded Linux operating system to build an intelligent distribution station area terminal platform, adopts a container technology and a micro-application program, and provides a deployment and operation environment for the micro-application program by utilizing the container technology to realize isolation and resource management of the micro-application program. According to the invention, full data acquisition, full state perception and full service penetration of the power distribution transformer area are realized, services such as accurate information management and control, lean operation and maintenance and electric energy quality operation index analysis of low-voltage power distribution and utilization equipment are provided in an APP mode, and the lean management level of the transformer area is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution Internet of Things, and in particular to an intelligent fusion device for substations with edge computing. Background Art

[0002] With the in-depth development of power distribution IoT technology, the number of terminal devices connected to the power grid is growing exponentially. The resulting massive amounts of real-time data pose a severe challenge to traditional centralized data processing architectures. Existing technologies often encounter high data transmission latency and high network bandwidth usage when processing sensory data generated by equipment in distribution areas. This makes it difficult to meet the timeliness requirements of scenarios such as real-time monitoring of power grid equipment status and rapid fault warnings. This is especially true when large numbers of devices are connected concurrently. Data congestion and processing delays can easily lead to a significant decrease in system response efficiency.

[0003] By migrating computing tasks to the edge of the network—that is, deploying computing nodes close to the devices or users where data is generated—we can effectively shorten the data processing chain, significantly improving the local processing capacity and response efficiency of real-time data, and providing key technical support for the efficient operation of IoT applications. In view of this, providing a substation intelligent fusion device with integrated edge computing capabilities, which can realize localized data storage, calculation, and decision-making at the distribution substation site, has become a pressing technical direction to address the bandwidth bottleneck of traditional centralized architectures and improve the real-time performance of power grid services. Summary of the Invention

[0004] The present invention provides an intelligent fusion device for substations with edge computing, which realizes full data collection, full status perception, and full business penetration of distribution substations, and provides services such as precise information management and control of low-voltage distribution and power equipment, lean operation and maintenance, and power quality operation indicator analysis in an APP manner. Relying on local analysis and decision-making in the substation and cloud-based collaborative computing mechanism, the lean management level of the substation is improved.

[0005] The present invention provides a substation intelligent fusion device with edge computing, including a main control module, a local communication module, a remote communication module, a debugging serial port, an RTC battery port, an indicator light, an RS232 / RS485 switch, an FE network port, a strong current connector, and a weak current connector. The main control module is respectively connected to the local communication module, the remote communication module, the debugging serial port, the RTC battery port, the indicator light, the RS232 / RS485 switch, the FE network port, the strong current connector, and the weak current connector;

[0006] The main control module is also connected to peripheral functional modules, including dedicated communication, acquisition, measurement, and control chips, to realize wireless communication, power line carrier communication, state quantity acquisition and control functions;

[0007] The remote communication module sends the data collected by the acquisition chip to the power distribution master station and the user master station respectively through Ethernet, 4G public network and micro-power wireless communication, and communicates with the equipment downlink through power line carrier and RS-485;

[0008] The main control module adopts a real-time embedded Linux operating system to build an intelligent radio area terminal platform, adopts container technology and micro-applications, and uses container technology to provide a deployment and operating environment for micro-applications to achieve isolation and resource management of micro-applications; the micro-applications in the container exchange data with external devices through RS232 / RS485, wireless communication modules, and power line carrier interfaces.

[0009] Furthermore, the container technology can be used to install and run application software in a separate container; and on this basis, it can be connected to the Internet of Things management platform to perform software management, container installation, viewing device containers, and installation of applications in containers. The container technology is implemented through operations such as packaging applications, creating containers, modifying containers, viewing containers, starting containers, stopping containers, restarting containers, deleting containers, application installation, application query, application stop, and application deletion.

[0010] Furthermore, the overall architecture design of the micro-application follows the following principles:

[0011] The interaction between micro-applications is completely based on the message mechanism, which decouples data interaction and avoids the management complexity caused by private interactions;

[0012] The principle of centralized data management is adopted to avoid each micro-application from establishing a private database for data storage and use;

[0013] Micro-application development uses unified reserved interfaces to ensure interoperability.

[0014] Furthermore, the micro-applications are divided into four types:

[0015] Basic management: communication protocols, databases, and configuration files;

[0016] Collection and monitoring: distribution transformer exchange collection, low-voltage branch collection and monitoring, branch monitoring and user-end monitoring, and environmental monitoring;

[0017] Operation and maintenance management: dynamic identification of low-voltage topology, low-voltage fault location, automatic reactive power regulation, low-voltage branch and segment line loss analysis, and terminal status management for integrated marketing and distribution;

[0018] User services: distribution transformer load forecasting, power supply reliability calculation for substations and users, and plug-and-play of low-voltage distributed power supplies.

[0019] Furthermore, the overall architecture of the micro-application is:

[0020] Basic platform part: includes hardware communication interface and driver, basic operating system, AI chip and access interface system-level module added later;

[0021] Resource virtualization part: It consists of a management container that allocates hardware resources and implements MQTT message interface and hardware interface access to the container:

[0022] Micro-application part: runs inside the container and is deployed, distributed and monitored through the power distribution automation master station;

[0023] Data interaction bus: Based on inter-container IP technology and the MQTT protocol, it enables cross-container message interaction.

[0024] Information security section: divided into data collection security, data storage security, data access security and data uplink communication security.

[0025] Furthermore, micro-application data access, data collection and storage, and message interaction between micro-applications adopt an information interaction process. The information interaction process is based on the MQTT protocol. Each micro-application implements the message interface according to the rules to realize a loosely coupled mechanism for message access between micro-applications to monitor and collect micro-application and advanced analysis messages.

[0026] Furthermore, the information interaction process includes:

[0027] Collect terminal operation data, so that the collection and monitoring app can collect data, receive and publish data through the message bus, query and subscribe to topics, and perform data push services, thereby performing real-time data storage. In addition, the advanced analysis app monitors data, subscribes to data, and stores data through a unified storage model. The publish data definition is performed through the publish, subscribe, and receive interface of the message bus, thereby collecting data.

[0028] Furthermore, in the information interaction process, the unified storage model is a unified data model based on the low-voltage substation, which defines the unique name of the data collection node and defines the private node name for interactive use according to the micro-application publishing requirements; the message bus provides a publish-subscribe topic interface, and each micro-application must first publish and subscribe to data topic registration before it can be started; the micro-application that provides data to the outside world calls the bus message publishing interface to publish data after generating new data; after receiving the published data, the message summary stores the data in a real-time database. After the message bus finds that the subscribed point data has changed, it starts the topic push program, calls the subscriber receiving interface according to the subscription topic information, and pushes the data.

[0029] Furthermore, the data storage module architecture for data storage includes:

[0030] Publish-subscribe bus: A cross-container message subscription and publishing management micro-application based on the MQTT protocol. It directly performs read and write operations on the data center. When the value of the real-time database changes, it retrieves the subscribers of the changed value, obtains the relevant subscription topic subscription message, and monitors the publishing interface of each publishing micro-application in real time to write the published data to the real-time database.

[0031] Database management module: initializes the real-time database and historical database based on the model issued by the master station and the device list of the local area; expands the database when the device ledger changes or new micro-applications register and publish new data; samples real-time data into the historical database based on the frequency of data collection; and performs cyclic overwriting operations when data backup and database capacity exceed the upper limit;

[0032] In-memory database: Use an in-memory database to support frequent data reading and writing, and store data in a historical database based on the principle of scheduled sampling;

[0033] Relational database: stores three parts of content: one is to store the low-voltage area model instance; the second is to provide temporary storage of process data for each micro-application; the third is to perform operation data sampling and storage;

[0034] Data access bus: Define a unified real-time and historical data query bus based on MQTT to avoid resource waste caused by multiple micro-applications running in parallel.

[0035] The beneficial effects of the present invention are:

[0036] 1. The present invention monitors the electric energy data of low-voltage substations in real time and transmits it to the data management center through wireless communication, which facilitates power companies to monitor and control electric energy consumption in real time, significantly improves the data processing speed and real-time performance, and enables Internet of Things applications to run more efficiently.

[0037] 2. The present invention has an intelligent management system that can improve the diagnostic accuracy and response speed of equipment failures through data sharing, data analysis and processing, while providing a scientific basis for the management and maintenance of power companies, eliminating redundant functions and reducing the workload of operation and maintenance.

[0038] 3. The intelligent fusion terminal of the present invention can control the switch status of the equipment in the low-voltage area, and realize remote control and automatic control of the equipment through remote control, reducing the difficulty and cost of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the appearance structure of the present invention.

[0040] Figure 2 This is a schematic diagram of the Xshell application interface in the present invention.

[0041] Figure 3 Schematic diagram of the overall process of micro-application in the present invention.

[0042] Figure 4 This is a flow chart of the message subscription mechanism in the present invention.

[0043] Figure 5 This is a schematic diagram of the call process of the collection micro-application APP interface in the present invention.

[0044] Figure 6 This is a schematic diagram of the edge computing APP interface calling process in the present invention.

[0045] Figure 7 This is a schematic diagram of the business APP interface calling process in the present invention.

[0046] Figure 8 Schematic diagram of the data storage access architecture in the present invention.

[0047] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The intelligent fusion device for the substation area of ​​the present invention is an edge device of the "cloud-pipe-edge" architecture of the smart Internet of Things system. It has information collection, Internet of Things agent and edge computing functions, and supports marketing, power distribution and emerging businesses. Adhering to the design concept of "hardware platformization and software APPization", it adopts functional softwareization, structural modularization, hardware and software decoupling, and communication protocol self-adaptation design. Based on distributed edge computing Internet of Things technology, it realizes "full data collection, full status perception, and full business penetration" in the distribution substation area. It provides services such as precise information management and control of low-voltage power distribution and utilization equipment, lean operation and maintenance, and power quality operation indicator analysis in the form of an APP, improving regional energy management capabilities, meeting the needs of high-performance concurrency, large-capacity storage, multiple collection objects, distributed energy access, and diversified load control, and realizing the flexible and rapid deployment of power supply and utilization information collection in the distribution substation area, data collection of each collection terminal or electricity meter, equipment status monitoring and communication networking, master station communication and collaborative computing, and distribution network services. Relying on local analysis and decision-making in the substation area and cloud-based collaborative computing mechanisms, it promotes the transformation of the low-voltage distribution network from passive management to active management mode, and improves the level of lean management in the substation area.

[0050] like Figure 1As shown, the present invention provides a station area intelligent fusion device with edge computing, including a main control module, a local communication module, a remote communication module, a debugging serial port, an RTC battery port, an indicator light, an RS232 / RS485 switch, an FE network port, a strong current connector and a weak current connector, and the main control module is respectively connected to the local communication module, the remote communication module, the debugging serial port, the RTC battery port, the indicator light, the RS232 / RS485 switch, the FE network port, the strong current connector and the weak current connector;

[0051] The main control module is also connected to peripheral functional modules, including dedicated communication, acquisition, metering, and control chips, to realize wireless communication, power line carrier communication, state quantity acquisition and control functions; the remote communication module sends the data collected by the acquisition chip to the power distribution master station and the user acquisition master station respectively through Ethernet, 4G public network and micro-power wireless communication, and communicates with the equipment downstream through power line carrier and RS-485;

[0052] The master control module uses a real-time embedded Linux operating system to build a highly reliable, fast, large-storage, and open intelligent distribution and utilization terminal platform. It employs container technology and micro-applications, leveraging container technology to provide a deployment and runtime environment for micro-applications, enabling isolation and resource management of micro-applications. It supports communication protocols for distribution and procurement systems, and remote communications using Ethernet, 4G public networks, and micro-power wireless communication methods to send data to the distribution and procurement master stations, respectively. Downlink communication with equipment is accomplished via power line carriers and RS-485, supporting remote upgrades. Peripheral functional modules utilize dedicated communication, data collection, metering, and control chips to implement wireless communication, power line carrier communication, and state quantity collection and control.

[0053] In one embodiment, the container technology can be used to install and run application software in a separate container. On this basis, it can access the IoT management platform to manage software, install containers, view device containers, and install applications in containers. Micro-applications in the container can exchange data with external devices through RS232 / RS485, wireless communication modules, and power line carrier interfaces.

[0054] Open Xshell, such as Figure 2 As shown, container technology is implemented through operations such as packaging applications, creating containers, modifying containers, viewing containers, starting containers, stopping containers, restarting containers, deleting containers, installing applications, querying applications, stopping applications, and deleting applications.

[0055] In one embodiment, the overall architecture design of the micro-application program of the intelligent fusion device of the substation of the present invention follows these three basic principles: first, the interaction between micro-applications is completely based on the message mechanism to achieve data interaction decoupling and avoid the management complexity caused by private interaction; second, the principle of centralized data management is adopted to avoid each micro-application from establishing a private database for data storage and use; third, a unified reserved interface is developed for micro-applications to ensure interoperability and interoperability.

[0056] In one embodiment, the micro-applications are divided into four types:

[0057] 1. Basic management: communication protocols, databases, configuration files, etc.

[0058] 2. Collection and monitoring: distribution transformer exchange collection, low-voltage branch collection and monitoring, branch monitoring and user-end monitoring, environmental monitoring, etc.

[0059] 3. Operation and maintenance management: dynamic identification of low-voltage topology, low-voltage fault location, automatic reactive power regulation, low-voltage branch and segment line loss analysis, and terminal status management for integrated marketing and distribution.

[0060] 4. User services: distribution transformer load forecasting, power supply reliability calculation for substations and users, plug-and-play of low-voltage distributed power supply, etc. In one embodiment, the overall architecture of the micro application is as follows: Figure 3 As shown, the overall architecture analysis consists of 5 main parts:

[0061] 1. The basic platform part includes system-level modules such as hardware communication interface and driver, basic operating system, AI chip and access interface added later.

[0062] 2. The resource virtualization part is mainly composed of a management container that allocates hardware resources and implements MQTT message interface and hardware interface access to the container.

[0063] 3. The micro-application part runs inside the container and is deployed, distributed, and monitored through the power distribution automation master station.

[0064] 4. The data interaction bus part realizes cross-container message interaction based on inter-container IP technology and MQTT protocol.

[0065] 5. The information security part can be divided into four main parts: data collection security, data storage security, data access security and data uplink communication security.

[0066] Message interaction process:

[0067] The information interaction process is the core part of micro-application data access, data collection and storage, and message interaction between micro-applications. Based on the MQTT protocol, each micro-application implements the message interface according to the rules, and realizes the loose coupling mechanism of message access between micro-applications to monitor and collect micro-application and advanced analysis messages. The specific process of the interaction process is as follows: Figure 4 As shown, and the three types of APP interface calling processes are as follows Figure 5-7 As shown (the collection micro application APP interface call process is as follows Figure 5 As shown, the edge computing APP interface calling process is as follows Figure 6 As shown, the business APP interface calling process is as follows Figure 7 ), specifically including:

[0068] The terminal operation data is collected, so that the collection and monitoring APP can collect data, receive and publish data through the message bus, query and subscribe to topics, and perform data push services, thereby performing real-time data storage, and monitoring data through the advanced analysis APP. The advanced analysis APP subscribes to data and stores data through a unified storage model. The data is defined through the publish, subscribe and receive interface of the message bus to collect data.

[0069] Among them, the key nodes are as follows:

[0070] 1. Based on the unified data model of the low-voltage area, define the unique name of the data collection node. At the same time, according to the micro-application publishing requirements, you can also define private node names for interactive use.

[0071] 2. The message bus provides a publish-subscribe topic interface. Each micro-application must first register for publish and subscribe data topics before it can be started.

[0072] 3. The micro-application that provides data to the outside world calls the bus message publishing interface to publish data after generating new data.

[0073] 4. Message Summary After receiving the published data, the data is stored in the real-time database. When the message bus finds that the subscribed point data has changed, it starts the topic push program, calls the subscriber receiving interface according to the subscribed topic information, and pushes the data.

[0074] Data storage architecture:

[0075] The marketing and distribution fusion terminal needs to store multiple types of data information, which are divided into low-voltage power grid model ledger data, secondary equipment set value configuration data, power grid operation data, marketing collection data, analytical micro-application calculation result data, etc. According to the data management principles of model unification and localized self-management, it is necessary to establish a unique data management and read-write channel, and establish a database self-maintenance mechanism to improve the efficiency of data fusion and collection and reduce management difficulty.

[0076] The overall data storage architecture is as follows Figure 8 As shown, the overall data storage architecture consists of five main parts:

[0077] 1. Publish-Subscribe Bus: A cross-container message dispatch and publish management micro-application based on the MQTT protocol. It directly reads and writes data to the data center. Its main function is to retrieve subscribers of the changed value when a real-time database value changes, obtain the relevant subscription topic, and publish and subscribe messages. It also monitors the publishing interfaces of each publishing micro-application in real time and writes the published data to the real-time database.

[0078] 2. Database management module: The database management module has four main functions: First, initialize the real-time database and historical database based on the model issued by the master station and the device list of this area; second, expand the database when the equipment ledger changes and new micro-applications register and publish new data; third, sample real-time data to the historical database based on the frequency attribute of published data collection; fourth, perform cyclic overwriting operations after data backup and database exceed the capacity limit.

[0079] 3. In-memory database (real-time database): To avoid terminal life issues caused by rapid data reading and writing, it is recommended to use an in-memory database to support frequent data reading and writing, and store the data in a historical database according to the principle of timed sampling.

[0080] 4. Relational database (historical database): The relational database stores three parts of content: one is to store the low-voltage area model instance; the second is to provide temporary storage of process data for each micro-application; and the third is to perform operation data sampling and storage.

[0081] 5. Data access bus: Define a unified real-time and historical data query bus based on MQTT to avoid resource waste caused by multiple micro-applications running in parallel.

[0082] The intelligent fusion device for substations with edge computing provided by the present invention has the following advantages:

[0083] Advantage 1: It can monitor the power data of low-voltage substations in real time and transmit it to the data management center through wireless communication, making it convenient for power companies to monitor and control power consumption in real time, significantly improving data processing speed and real-time performance, and enabling IoT applications to operate more efficiently.

[0084] Advantage 2: The present invention has an intelligent management system that can improve the diagnostic accuracy and response speed of equipment failures through data sharing, data analysis and processing, while providing a scientific basis for the management and maintenance of power companies, eliminating redundant functions and reducing the workload of operation and maintenance.

[0085] Advantage 3: The intelligent fusion terminal can control the on / off status of equipment in the low-voltage substation area, and realize remote control and automatic control of equipment through remote control, reducing the difficulty and cost of manual operation.

[0086] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, apparatus, article, or method comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, apparatus, article, or method. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, apparatus, article, or method comprising the element.

[0087] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A smart fusion device for substations with edge computing, characterized in that: It includes a main control module, a local communication module, a remote communication module, a debug serial port, an RTC battery port, an indicator light, an RS232 / RS485 switch, an FE network port, a strong current connector and a weak current connector. The main control module is respectively connected to the local communication module, the remote communication module, the debug serial port, the RTC battery port, the indicator light, the RS232 / RS485 switch, the FE network port, the strong current connector and the weak current connector; The main control module is also connected to peripheral functional modules, including dedicated communication, acquisition, measurement, and control chips, to realize wireless communication, power line carrier communication, state quantity acquisition and control functions; The remote communication module sends the data collected by the acquisition chip to the power distribution master station and the user master station respectively through Ethernet, 4G public network and micro-power wireless communication, and communicates with the equipment downlink through power line carrier and RS-485; The main control module adopts a real-time embedded Linux operating system to build an intelligent radio area terminal platform, adopts container technology and micro-applications, and uses container technology to provide a deployment and operating environment for micro-applications to achieve isolation and resource management of micro-applications; the micro-applications in the container exchange data with external devices through RS232 / RS485, wireless communication modules, and power line carrier interfaces.

2. The intelligent fusion device with edge computing according to claim 1, characterized in that: The container technology can be used to install and run application software in a separate container; on this basis, it can be connected to the Internet of Things management platform to perform software management, container installation, viewing device containers, and installation of applications in containers. The container technology is implemented through operations such as packaging applications, creating containers, modifying containers, viewing containers, starting containers, stopping containers, restarting containers, deleting containers, application installation, application query, application stop, and application deletion.

3. The intelligent fusion device with edge computing according to claim 1, characterized in that: The overall architecture design of the micro-application follows the following principles: The interaction between micro-applications is completely based on the message mechanism, which decouples data interaction and avoids the management complexity caused by private interactions; The principle of centralized data management is adopted to avoid each micro-application from establishing a private database for data storage and use; Micro-application development uses unified reserved interfaces to ensure interoperability.

4. The intelligent fusion device for substations with edge computing according to claim 3 is characterized in that: The micro-applications are divided into four types: Basic management: communication protocols, databases, and configuration files; Collection and monitoring: distribution transformer exchange collection, low-voltage branch collection and monitoring, branch monitoring and user-end monitoring, and environmental monitoring; Operation and maintenance management: dynamic identification of low-voltage topology, low-voltage fault location, automatic reactive power regulation, low-voltage branch and segment line loss analysis, and terminal status management for integrated marketing and distribution; User services: distribution transformer load forecasting, power supply reliability calculation for substations and users, and plug-and-play of low-voltage distributed power supplies.

5. The intelligent fusion device for substations with edge computing according to claim 4, characterized in that: The overall architecture of the micro application is: Basic platform part: includes hardware communication interface and driver, basic operating system, AI chip and access interface system-level module added later; Resource virtualization part: It consists of a management container that allocates hardware resources and implements MQTT message interface and hardware interface access to the container: Micro-application part: runs inside the container and is deployed, distributed and monitored through the power distribution automation master station; Data interaction bus: Based on inter-container IP technology and the MQTT protocol, it enables cross-container message interaction. Information security section: divided into data collection security, data storage security, data access security and data uplink communication security.

6. The intelligent fusion device for substations with edge computing according to claim 5, characterized in that: Micro-application data access, data collection and storage, and message interaction between micro-applications adopt an information interaction process based on the MQTT protocol. Each micro-application implements the message interface according to the rules to achieve a loosely coupled mechanism for message access between micro-applications to monitor and collect micro-application and advanced analysis messages.

7. The intelligent fusion device for substations with edge computing according to claim 6, characterized in that: The information exchange process includes: The terminal operation data is collected, so that the collection and monitoring APP can collect data, receive and publish data through the message bus, query and subscribe to topics, and perform data push services, thereby performing real-time data storage, and monitoring data through the advanced analysis APP. The advanced analysis APP subscribes to data and stores data through a unified storage model. The data is defined through the publish, subscribe and receive interface of the message bus to collect data.

8. The intelligent fusion device for substations with edge computing according to claim 7, characterized in that: In the information interaction process, the unified storage model is a unified data model based on the low-voltage area, which defines the unique name of the data collection node. At the same time, according to the micro-application publishing requirements, the private node name is defined for interactive use; the message bus provides a publish-subscribe topic interface, and each micro-application must first register for publishing and subscribing data topics when it starts running; Micro-applications that provide data to the outside world call the bus message publishing interface to publish data after generating new data; after the message summary receives the published data, it stores the data in the real-time database. After the message bus finds that the subscribed point data has changed, it starts the topic push program, calls the subscriber receiving interface according to the subscription topic information, and pushes the data.

9. The intelligent fusion device for substations with edge computing according to claim 7, characterized in that: The data storage module architecture for data storage includes: Publish-subscribe bus: A cross-container message subscription and publishing management micro-application based on the MQTT protocol. It directly performs read and write operations on the data center. When the value of the real-time database changes, it retrieves the subscribers of the changed value, obtains the relevant subscription topic subscription message, and monitors the publishing interface of each publishing micro-application in real time to write the published data to the real-time database. Database management module: initializes the real-time database and historical database based on the model issued by the master station and the device list of the local area; expands the database when the device ledger changes or new micro-applications register and publish new data; samples real-time data into the historical database based on the frequency of data collection; and performs cyclic overwriting operations when data backup and database capacity exceed the upper limit; In-memory database: Use an in-memory database to support frequent data reading and writing, and store data in a historical database based on the principle of scheduled sampling; Relational database: stores three parts of content: one is to store the low-voltage area model instance; the second is to provide temporary storage of process data for each micro-application; the third is to perform operation data sampling and storage; Data access bus: Define a unified real-time and historical data query bus based on MQTT to avoid resource waste caused by multiple micro-applications running in parallel.

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