Edge end interaction system and method of low-voltage distributed photovoltaic access equipment

Abstract

The invention relates to a side-end interaction system and method for low-voltage distributed photovoltaic access equipment, and the system comprises end equipment and side equipment, the end equipment is used for publishing collected data to a message bus, and initiating a subscription demand to the message bus; and the side equipment is used for receiving the data message sent by the end equipment from the message bus in real time, storing the data message sent by the end equipment, and providing required data for the end equipment according to the subscription demand. According to the invention, data interaction decoupling can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution networks and distributed power supply technologies, and in particular to an edge-end interaction system and method for low-voltage distributed photovoltaic access equipment. Background Art

[0002] With the rapid development of new elements such as distributed photovoltaics, electric vehicle charging stations, and new energy storage technologies, the demand for data collection and sensing in low-voltage distribution networks is rapidly increasing, and the number of devices on the edge is bound to explode. At the same time, the integration of distributed photovoltaics also leads to power quality issues such as voltage and harmonics, as well as power backflow in some areas or lines, impacting the safe and stable operation of the distribution network and the safety of maintenance operations.

[0003] Currently, there are two mainstream distributed photovoltaic access solutions: flexible control using a "substation smart terminal + photovoltaic inverter" approach, and rigid control using a "substation smart terminal + photovoltaic grid-connected circuit breaker" approach. The first flexible control solution uses the substation smart terminal to directly control the photovoltaic inverter via a photovoltaic information collection unit installed in the grid-connected box. This solution continuously adjusts the photovoltaic inverter's power using low-voltage power line high-speed carrier communication (HPLC) or micro-power wireless communication. This solution is suitable for scenarios where the photovoltaic inverter's communication interface is intact and the communication protocol is compatible. The second rigid control solution uses the substation smart terminal to control the photovoltaic grid-connected circuit breaker installed at the front end of the photovoltaic inverter using HPLC to achieve grid-connection and off-grid control of the photovoltaic inverter. This solution is suitable for scenarios where the photovoltaic inverter's communication interface is damaged or the communication protocol is not compatible. The substation smart terminal, as an end device, is installed near the distribution transformer and is responsible for collecting data from end devices across the substation, including low-voltage switches, capacitors, environmental sensors, smart meters, and integrated management devices, and generating comprehensive policies. It supports app-based installation and deployment, allowing for flexible expansion of service capabilities. The photovoltaic inverters or photovoltaic grid-connected circuit breakers involved in the above solutions all require an edge interaction method, but the existing technology lacks an effective edge data interaction method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an edge interaction system and method for low-voltage distributed photovoltaic access equipment to achieve data interaction decoupling.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide an edge-end interactive system for low-voltage distributed photovoltaic access equipment, including an end device and an edge device;

[0006] The terminal device is used to publish the collected data to the message bus and initiate a subscription request to the message bus;

[0007] The edge device is used to receive data messages sent by the end device from the message bus in real time, store the data messages sent by the end device, and provide required data to the end device according to the subscription requirements;

[0008] A micro-application module is deployed on the terminal device, and the micro-application module includes:

[0009] A data sending unit, configured to publish the collected real-time data to the message bus in the form of data messages;

[0010] A demand sending unit, configured to initiate a subscription demand to the message bus;

[0011] A data receiving unit is used to obtain data provided by the edge device in response to the subscription requirement from the message bus.

[0012] A data center is deployed on the edge device, and the data center includes:

[0013] A real-time database, configured to obtain data messages sent by the terminal device from the message bus in real time, read and write the data messages, and send data in the obtained data messages to a historical database based on a preset time interval;

[0014] A historical database is used to receive data sent regularly by the real-time database, store the data, retrieve the data according to the subscription requirements, and send the retrieved data required by the terminal device to the message bus, and store the distribution network device attribute data; the stored distribution network device attribute data includes: distributed photovoltaic access device model instances, distributed photovoltaic access device connection information and management area device fixed value data;

[0015] The data management module is used to manage the real-time database and the historical database.

[0016] The data management module includes:

[0017] An initialization unit, configured to obtain a data model issued by a distribution network master station, instantiate a distribution network device list of the historical database according to the mathematical model, and initialize the real-time database and the historical database;

[0018] An expansion unit, configured to expand the real-time database and the historical database when a device list in the historical database changes or a new micro-application is registered on the terminal device;

[0019] An interaction unit, configured to call the interface of the message bus to implement data interaction between the data bus and the data center, and collect data from the real-time database and transmit it to the historical database;

[0020] The covering unit is used to cyclically cover the data exceeding the upper limit according to the upper limits set by the real-time database and the historical database.

[0021] The terminal device includes:

[0022] Basic platform, used to provide end device communication interface and driver, basic operating system, AI chip and access interface;

[0023] A resource virtualization module, configured to run the micro-application module and access the interface of the message bus and the terminal device communication interface;

[0024] The micro-application management module is used to deploy, issue, upgrade, uninstall and monitor the operation of the micro-application module.

[0025] The micro-application module also includes:

[0026] The collection micro-application unit is used to obtain the acquisition instruction issued by the micro-application management module, and obtain the attributes of each distribution network device and the application data attributes according to the acquisition instruction, and is also used to process the acquired attributes of each distribution network device and the application data attributes and send the processed data to the message bus;

[0027] An analysis micro-application unit, configured to obtain an analysis instruction issued by the micro-application management module, analyze and calculate the data required by the subscriber according to the analysis instruction, and send the data required by the subscriber to the message bus;

[0028] The local communication management micro-application unit is used to implement priority management of messages initiated by the collection micro-application and the analysis micro-application.

[0029] The local communication management micro-application unit includes:

[0030] The first judgment subunit is used to judge whether a certain collection type micro application unit has initiated multiple concurrent requests for the same device file;

[0031] The first processing sub-unit is configured to, when a certain collection-type micro-application unit initiates multiple concurrent requests for the same device profile, process the first of the concurrent requests and, before the first request receives a response from the carrier, send a negative response frame to the other requests;

[0032] The second judgment subunit is used to judge whether there are multiple collection-type micro-application units issuing concurrent requests when no collection-type micro-application unit has issued multiple concurrent requests for the same device file;

[0033] The second processing sub-unit is used to sort the concurrent requests according to the preset business class priority when there are multiple collection-type micro-application units issuing concurrent requests, and to process them according to the sorting results; among the preset business class priorities, the control-type business priority is higher than the event-type business priority, and the event-type business priority is higher than the collection-type business priority.

[0034] The technical solution adopted by the present invention to solve the technical problem is to provide an edge-end interaction method for low-voltage distributed photovoltaic access equipment, including the following steps:

[0035] The terminal device publishes the collected real-time data to the message bus in the form of data messages, and initiates a subscription request to the message bus when there is a subscription request;

[0036] The end device obtains the data provided by the edge device in response to the subscription requirement from the message bus.

[0037] The terminal device is deployed with a micro-application module. The terminal device publishes the collected data to the message bus in the form of data messages, and initiates a subscription request to the message bus when there is a subscription request, specifically including:

[0038] The micro-application module controls the terminal device connection information interaction interface, the device data model data interaction interface and the data publishing interface;

[0039] The micro-application module obtains the connection information and data acquisition node data attributes of each distributed photovoltaic access device based on the device connection information interaction interface and the device data model data interaction interface;

[0040] The micro-application module pushes the acquired connection information of each distributed photovoltaic access device and data attributes of the data acquisition node to the message bus in the form of a data message based on the data publishing interface;

[0041] The micro-application module determines whether a subscription request is received, and when a subscription request is received, sends the subscription request to the message bus.

[0042] The edge-end interaction method of the low-voltage distributed photovoltaic access device further includes:

[0043] The collection type micro application unit in the micro application module obtains the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area equipment constant data, and sends the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area equipment constant data to the message bus.

[0044] The technical solution adopted by the present invention to solve the technical problem is to provide an edge-end interaction method for low-voltage distributed photovoltaic access equipment, including:

[0045] The edge device stores the data messages sent by the end device and obtained from the message bus in real time, and publishes the subscription data to the message bus according to the subscription requirements.

[0046] The edge device is deployed with a data center, and the edge device stores the data messages sent by the end device obtained from the message bus and publishes the subscription data to the message bus according to the subscription requirements, specifically including:

[0047] The real-time database of the data center reads and writes the data messages sent by the terminal devices obtained from the message bus, and sends the data in the obtained data messages to the historical database regularly based on a preset time interval;

[0048] The historical database of the data center receives the data sent regularly by the real-time database, stores the data, and searches based on the subscription requirements, and sends the retrieved data required by the terminal device to the message bus.

[0049] The edge-end interaction method of the low-voltage distributed photovoltaic access device further includes:

[0050] The historical database of the data center receives the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area device fixed value data from the message bus;

[0051] The historical database of the data center stores the distributed photovoltaic access equipment model instance, the distributed photovoltaic access equipment connection information and the management area equipment fixed value data according to the corresponding data model.

[0052] Beneficial effects

[0053] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages and positive effects compared to the existing technology: the present invention establishes interactive connections between edge devices and end devices through a message bus, decoupling the data interaction between the collection micro-application and the analysis micro-application in the end device, avoiding the management complexity caused by private interactions. The present invention uniformly stores data through the edge device's data center, avoiding the need for each micro-application to establish a private database for data storage and use, and achieving full data business connectivity. At the same time, the present invention also realizes the orderly execution of various services within the distribution station area based on business priority design. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1This is an architectural diagram of an edge-end interactive system for low-voltage distributed photovoltaic access equipment according to an embodiment of the present invention;

[0055] Figure 2 This is a flow chart of the edge-end interaction of low-voltage distributed photovoltaic access equipment in an embodiment of the present invention;

[0056] Figure 3 This is a flow chart of edge devices during edge-end interaction of low-voltage distributed photovoltaic access equipment in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0058] The embodiment of the present invention relates to an edge-end interactive system for low-voltage distributed photovoltaic access equipment, such as Figure 1 As shown, it includes an end device and an edge device. In this embodiment, a message bus is set between the end device and the edge device.

[0059] The terminal device is used to publish the collected data to the message bus and initiate a subscription request to the message bus;

[0060] The edge device is used to receive data messages sent by the end device from the message bus in real time, store the data messages sent by the end device, and provide required data to the end device according to the subscription requirements;

[0061] The message bus is used to receive data collected by the end device and subscription requirements, publish the received data to the edge device, and send data to the end device according to the subscription requirements.

[0062] In this embodiment, a micro-application module is deployed on the end device, and a data center is deployed on the edge device. The message bus in this embodiment can be a cross-container message bus based on the MQTT protocol, which uses the publish / subscribe message mode to provide a bridge for data interaction between the end device and the edge device. It can monitor the publishing interface of each micro-application module in the end device in real time, transmit the published data to the data center of the edge device, and publish the search results of the data center of the edge device based on the subscription requirements of each micro-application module of the end device to the end device. The message bus can also provide interfaces such as device connection information interaction, device data model interaction, active data publishing, application registration, and historical data query according to the needs of the distribution network business.

[0063] The micro-application module in this embodiment includes a data sending unit, a request sending unit, and a data receiving unit. The data sending unit is used to publish the collected real-time data to the message bus in the form of data messages; the request sending unit is used to initiate subscription requests to the message bus; and the data receiving unit is used to obtain data provided by the edge device in response to the subscription request from the message bus.

[0064] The data center in this embodiment includes a real-time database, a historical database and a data management module.

[0065] The real-time database is used to obtain data messages sent by the terminal device from the message bus in real time, read and write the data messages, and periodically send data in the obtained data messages to the historical database based on a preset time interval. In this embodiment, to avoid shortening the life of the terminal flash memory due to frequent data reading and writing, the real-time database can be an in-memory database that can support real-time data reading and writing and can periodically store data in the historical database according to the principle of timed sampling.

[0066] The historical database is used to receive and store data regularly transmitted by the real-time database, retrieve data based on subscription requirements, and send the retrieved data required by the end device to the message bus. The historical database can also be used to store distribution network device attribute data; the stored distribution network device attribute data includes: distributed photovoltaic access device model instances, distributed photovoltaic access device connection information, and management substation device constant value data. In this embodiment, the historical database stores four parts: storage of low-voltage substation device model instances; storage of low-voltage substation device connection information; storage of management substation device constant values; and real-time data sampling and storage.

[0067] The data management module is used to manage the real-time database and the historical database. The database management module in this embodiment includes an initialization unit, an expansion unit, an interaction unit and a coverage unit. Among them, the initialization unit is used to obtain the data model issued by the distribution network master station, and instantiate the distribution network device list of the historical database according to the mathematical model, and initialize the real-time database and the historical database; the expansion unit is used to expand the real-time database and the historical database when the device list of the historical database changes or a new micro-application is registered on the terminal device; the interaction unit is used to call the interface of the message bus to realize the data interaction between the data bus and the data center, and collect the data in the real-time database and transmit it to the historical database; the coverage unit is used to cyclically cover the data exceeding the upper limit according to the upper limit set by the real-time database and the historical database.

[0068] The end device in this embodiment includes a basic platform, a resource virtualization module, and a micro-application management module. The basic platform is used to provide the end device communication interface and driver, basic operating system, AI chip, and access interface; the resource virtualization module is used to run the micro-application module and access the interface of the message bus and the end device communication interface; the micro-application management module is used to deploy, issue, upgrade, uninstall, and monitor the operation of the micro-application module.

[0069] The micro-application module in this embodiment also includes a collection micro-application unit, an analysis micro-application unit, and a local communication management micro-application unit.

[0070] The acquisition-type micro-application unit, as the data mapping carrier of the end device, can be defined as interacting directly with the hardware interface, not responsible for data processing, and requiring uniqueness for the hardware interface. The acquisition-type micro-application unit in this embodiment is used to obtain the acquisition instruction issued by the micro-application management module, and obtain the attributes of each distribution network device and application data according to the acquisition instruction. It is also used to process the acquired attributes of each distribution network device and application data, and send the processed data to the message bus.

[0071] The analysis micro-application unit serves as a data mapping carrier for advanced analysis functions. It can perform edge computing on the collected data to provide advanced analysis functions without participating in the hardware interface interaction of the data. The analysis micro-application unit in this embodiment is used to obtain the analysis instructions issued by the micro-application management module, analyze and calculate the data required by the subscriber according to the analysis instructions, and send the data required by the subscriber to the message bus.

[0072] The local communication management micro-application unit in this embodiment is used to implement priority management of messages initiated by the collection micro-application and the analysis micro-application. The local communication management micro-application unit includes:

[0073] The first judgment subunit is used to judge whether a certain collection type micro application unit has initiated multiple concurrent requests for the same device file;

[0074] The first processing sub-unit is configured to, when a certain collection-type micro-application unit initiates multiple concurrent requests for the same device profile, process the first of the concurrent requests and, before the first request receives a response from the carrier, send a negative response frame to the other requests;

[0075] The second judgment subunit is used to judge whether there are multiple collection-type micro-application units issuing concurrent requests when no collection-type micro-application unit has issued multiple concurrent requests for the same device file;

[0076] The second processing sub-unit is used to sort the concurrent requests according to the preset business class priority when there are multiple collection-type micro-application units issuing concurrent requests, and to process them according to the sorting results; among the preset business class priorities, the control-type business priority is higher than the event-type business priority, and the event-type business priority is higher than the collection-type business priority.

[0077] Taking meter reading as an example, the local communication management micro-application defaults to a maximum number of concurrent collection channels of 5, that is, up to 5 concurrent reading messages can be sent at the same time, and follows the basic principle of concurrent meter reading, that is, in the 5 concurrent frames, concurrent frames with the same meter address or the same collector address do not appear at the same time, ensuring maximum concurrent efficiency.

[0078] After receiving a reading request message from the collection micro-application unit, it allocates memory for the concurrently requested distributed photovoltaic equipment file and stores the concurrent reading request frame for that file. It waits for an idle channel to appear before sending it. The sending strategy is to loop through the request messages to be sent and immediately send the currently retrieved concurrent request frame when an idle concurrent channel appears. The workflow of the local communication management micro-application unit is as follows:

[0079] First, determine whether a collection micro-application unit has initiated multiple concurrent requests for the same device file;

[0080] If a collection-type micro-application unit initiates multiple concurrent requests for the same device file, the first request among the concurrent requests will be processed, and before the first request receives a response from the carrier, a denial frame will be uniformly replied to the other requests; this processing can ensure that the concurrent meter reading process is executed in an orderly manner and is not interfered with by other external micro-application requests.

[0081] If no collection-type micro-application unit has initiated multiple concurrent requests for the same device file, further determine whether multiple collection-type micro-application units have issued concurrent requests;

[0082] If multiple collection-type micro-application units issue concurrent requests, they are sorted according to the preset service class priorities and processed accordingly. Among the preset service class priorities, control-type services have a higher priority than event-type services, and event-type services have a higher priority than collection-type services. In other words, control-type services have the highest priority, event-type services have the second highest priority, and collection-type services have the lowest priority.

[0083] In this embodiment, the service priority can be managed by the local communication management micro-application unit, thereby achieving orderly execution of various services within the distribution station area.

[0084] This embodiment also relates to a low-voltage distributed photovoltaic access device edge interaction method, such as Figure 2 As shown, for the terminal device, the following steps are specifically included:

[0085] In step 1, the terminal device publishes the collected real-time data to the message bus in the form of a data message, and initiates a subscription request to the message bus when there is a subscription request. In this embodiment, a micro-application module is deployed on the terminal device, and when executing this step, it specifically includes:

[0086] The micro-application module controls the terminal device connection information interaction interface, the device data model data interaction interface and the data publishing interface;

[0087] The micro-application module obtains the connection information and data acquisition node data attributes of each distributed photovoltaic access device based on the device connection information interaction interface and the device data model data interaction interface;

[0088] The micro-application module pushes the acquired connection information of each distributed photovoltaic access device and data attributes of the data acquisition node to the message bus in the form of a data message based on the data publishing interface;

[0089] The micro-application module determines whether a subscription request is received, and when a subscription request is received, sends the subscription request to the message bus.

[0090] Step 2: The end device obtains the data provided by the edge device in response to the subscription request from the message bus.

[0091] In the edge-end interaction method of the low-voltage distributed photovoltaic access device of this embodiment, for the edge device, the following steps are included:

[0092] The edge device stores the data messages sent by the end device obtained from the message bus in real time, and publishes the subscription data to the message bus according to the subscription requirements. In this embodiment, the edge device is deployed with a data center. When executing this step, the specific steps are as follows:

[0093] The real-time database of the data center reads and writes the data messages sent by the terminal devices obtained from the message bus, and sends the data in the obtained data messages to the historical database regularly based on a preset time interval;

[0094] The historical database of the data center receives the data sent regularly by the real-time database, stores the data, and searches based on the subscription requirements, and sends the retrieved data required by the terminal device to the message bus.

[0095] The edge-end interaction method of the low-voltage distributed photovoltaic access device of this embodiment also involves the storage of distribution network device attribute data, wherein, when the end device executes, the following steps are included:

[0096] The acquisition micro-application unit in the micro-application module obtains a distributed photovoltaic access device model instance, distributed photovoltaic access device connection information, and management area device fixed value data, and sends the distributed photovoltaic access device model instance, distributed photovoltaic access device connection information, and management area device fixed value data to the message bus;

[0097] When the edge device executes, the following steps are included:

[0098] The historical database of the data center receives the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area device fixed value data from the message bus;

[0099] The historical database of the data center stores the distributed photovoltaic access equipment model instance, the distributed photovoltaic access equipment connection information and the management area equipment fixed value data according to the corresponding data model.

[0100] It is not difficult to find that the present invention establishes interactive connections between the data center and end devices through a message bus, achieving decoupling of data interaction between the collection micro-application and the analysis micro-application in the end device, avoiding the management complexity caused by private interactions. The present invention stores data uniformly through the data center, eliminating the need for each micro-application to establish a private database for data storage and use, and achieving full data business connectivity. At the same time, the present invention also uses business priority design to achieve the orderly execution of various businesses within the distribution station area.

Claims

1. A low-voltage distributed photovoltaic access equipment edge interaction system, characterized in that: It includes end devices and edge devices. The end devices are used to publish the collected data to the message bus and initiate subscription requests to the message bus; The edge device is used to receive the data message sent by the end device from the message bus in real time, store the data message sent by the end device, and provide the required data to the end device according to the subscription requirements.

2. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 1 is characterized in that: A micro-application module is deployed on the terminal device, and the micro-application module includes: A data sending unit, configured to publish the collected real-time data to the message bus in the form of data messages; A demand sending unit, configured to initiate a subscription demand to the message bus; A data receiving unit is used to obtain data provided by the edge device in response to the subscription requirement from the message bus.

3. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 1, characterized in that: A data center is deployed on the edge device, and the data center includes: A real-time database, configured to obtain data messages sent by the terminal device from the message bus in real time, read and write the data messages, and send data in the obtained data messages to a historical database based on a preset time interval; A historical database is used to receive data sent regularly by the real-time database, store the data, retrieve the data according to the subscription requirements, and send the retrieved data required by the terminal device to the message bus, and store the distribution network device attribute data; the stored distribution network device attribute data includes: distributed photovoltaic access device model instances, distributed photovoltaic access device connection information and management area device fixed value data; The data management module is used to manage the real-time database and the historical database.

4. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 3 is characterized in that: The data management module includes: An initialization unit, configured to obtain a data model issued by a distribution network master station, instantiate a distribution network device list of the historical database according to the mathematical model, and initialize the real-time database and the historical database; An expansion unit, configured to expand the real-time database and the historical database when a device list in the historical database changes or a new micro-application is registered on the terminal device; An interaction unit, configured to call the interface of the message bus to implement data interaction between the data bus and the data center, and collect data from the real-time database and transmit it to the historical database; The covering unit is used to cyclically cover the data exceeding the upper limit according to the upper limits set by the real-time database and the historical database.

5. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 2, characterized in that: The terminal device includes: Basic platform, used to provide end device communication interface and driver, basic operating system, AI chip and access interface; A resource virtualization module, configured to run the micro-application module and access the interface of the message bus and the terminal device communication interface; The micro-application management module is used to deploy, issue, upgrade, uninstall and monitor the operation of the micro-application module.

6. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 5, characterized in that: The micro-application module also includes: The collection micro-application unit is used to obtain the acquisition instruction issued by the micro-application management module, and obtain the attributes of each distribution network device and the application data attributes according to the acquisition instruction, and is also used to process the acquired attributes of each distribution network device and the application data attributes and send the processed data to the message bus; An analysis micro-application unit, configured to obtain an analysis instruction issued by the micro-application management module, analyze and calculate the data required by the subscriber according to the analysis instruction, and send the data required by the subscriber to the message bus; The local communication management micro-application unit is used to implement priority management of messages initiated by the collection micro-application and the analysis micro-application.

7. The edge-end interactive system of low-voltage distributed photovoltaic access equipment according to claim 6, characterized in that: The local communication management micro-application unit includes: The first judgment subunit is used to judge whether a certain collection type micro application unit has initiated multiple concurrent requests for the same device file; The first processing sub-unit is configured to, when a certain collection-type micro-application unit initiates multiple concurrent requests for the same device profile, process the first of the concurrent requests and, before the first request receives a response from the carrier, send a negative response frame to the other requests; The second judgment subunit is used to judge whether there are multiple collection-type micro-application units issuing concurrent requests when no collection-type micro-application unit has issued multiple concurrent requests for the same device file; The second processing sub-unit is used to sort the concurrent requests according to the preset business class priority when there are multiple collection-type micro-application units issuing concurrent requests, and to process them according to the sorting results; among the preset business class priorities, the control-type business priority is higher than the event-type business priority, and the event-type business priority is higher than the collection-type business priority.

8. A method for edge-end interaction of low-voltage distributed photovoltaic access equipment, characterized in that: include: The terminal device publishes the collected real-time data to the message bus in the form of data messages, and initiates a subscription request to the message bus when there is a subscription request; The end device obtains the data provided by the edge device in response to the subscription requirement from the message bus.

9. The edge-end interaction method of low-voltage distributed photovoltaic access equipment according to claim 8, characterized in that: The terminal device is deployed with a micro-application module. The terminal device publishes the collected data to the message bus in the form of data messages, and initiates a subscription request to the message bus when there is a subscription request, specifically including: The micro-application module controls the terminal device connection information interaction interface, the device data model data interaction interface and the data publishing interface; The micro-application module obtains the connection information and data acquisition node data attributes of each distributed photovoltaic access device based on the device connection information interaction interface and the device data model data interaction interface; The micro-application module pushes the acquired connection information of each distributed photovoltaic access device and data attributes of the data acquisition node to the message bus in the form of a data message based on the data publishing interface; The micro-application module determines whether a subscription request is received, and when a subscription request is received, sends the subscription request to the message bus.

10. The edge-end interaction method of low-voltage distributed photovoltaic access equipment according to claim 9, characterized in that: Also includes: The collection type micro application unit in the micro application module obtains the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area equipment constant data, and sends the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area equipment constant data to the message bus.

11. A method for edge-end interaction of low-voltage distributed photovoltaic access equipment, characterized in that: include: The edge device stores the data messages sent by the end device and obtained from the message bus in real time, and publishes the subscription data to the message bus according to the subscription requirements.

12. The edge-end interaction method of low-voltage distributed photovoltaic access equipment according to claim 11, characterized in that: The edge device is deployed with a data center, and the edge device stores the data messages sent by the end device obtained from the message bus and publishes the subscription data to the message bus according to the subscription requirements, specifically including: The real-time database of the data center reads and writes the data messages sent by the terminal device obtained from the message bus, and sends the data in the obtained data messages to the historical database at regular intervals based on a preset time interval; the historical database of the data center receives the data sent regularly by the real-time database, stores the data, and retrieves the data based on the subscription requirements, and sends the retrieved data required by the terminal device to the message bus.

13. The edge-end interaction method of low-voltage distributed photovoltaic access equipment according to claim 12, characterized in that: Also includes: The historical database of the data center receives the distributed photovoltaic access device model instance, the distributed photovoltaic access device connection information and the management area device fixed value data from the message bus; The historical database of the data center stores the distributed photovoltaic access equipment model instance, the distributed photovoltaic access equipment connection information and the management area equipment fixed value data according to the corresponding data model.

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