Power transformation and distribution station data collection system and method

Abstract

The invention relates to a power transformation and distribution station data collection system and method, and belongs to the technical field of electric power automation. By adopting the system and the method, the system comprises a data collection device and an intelligent fusion terminal in which communication micro-application software runs. Wherein a data acquisition communication module in the data collection device is in communication connection with each physical device for data acquisition; the physical equipment management module manages a physical equipment memory linked list, and the logic equipment management module manages a logic equipment memory linked list; the data forwarding communication module simulates the establishment of a communication link channel between each logic device and the intelligent fusion terminal in which communication micro-application software runs; the data collection device serves as a communication agent, supports a heterogeneous communication interface and a communication protocol while expanding a communication interface, is converted into a unified standard communication protocol, then is accessed to special communication micro application software matched with the communication protocol in the intelligent fusion terminal, and then writes data to an Internet of Things data center, so that the process is simplified, and the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of power automation technology, in particular to the field of transformer substation automation technology, and specifically refers to a transformer substation data collection system and method. Background Art

[0002] Substation refers to a 10 / 0.4kV voltage level substation or distribution station building, and its specific forms include indoor substation, box-type substation, etc. Substation generally has primary equipment such as transformer, high-voltage switchgear, low-voltage switchgear, capacitor compensator, and secondary equipment such as microcomputer protection, multi-function power meter, reactive power compensation device, substation environment monitoring, etc.

[0003] In recent years, in order to meet the people's growing demand for power supply reliability, higher requirements have been put forward for intelligent operation and maintenance and rapid repair of substations, and the necessity of intelligent and digital substations has become prominent. The difficulty in intelligent and digital substations lies in the data integration and remote communication of various intelligent devices in substations.

[0004] In order to promote the digitalization and information integration capabilities of low-voltage power distribution, State Grid Corporation of China has vigorously promoted the application of intelligent fusion terminals. The intelligent fusion terminal realizes the basic power collection of the low-voltage main switch of the substation transformer, and provides a general information access and storage forwarding, application deployment platform. The intelligent fusion terminal generally realizes information exchange through the 4G encrypted channel and the power company's Internet of Things management platform. Accessing the Internet of Things management platform through the intelligent fusion terminal has become the main mode of information integration of the power grid company's substation.

[0005] The hardware CPU of the intelligent converged terminal is based on the ARM64 architecture, and the software environment is embedded Linux. The device provides multiple wired and wireless communication ports, and provides container-based micro-application development and deployment capabilities. Users can expand the functions of the converged terminal by developing micro-applications. The micro-application architecture of the intelligent converged terminal is shown in the figure below: Figure 1 shown.

[0006] The intelligent converged terminal also provides a complete set of SDKs to implement registration management and information interaction between connected IoT devices and remote IoT platforms.

[0007] In practical work, there are two problems in the use of existing intelligent fusion terminals. First, due to the limitation of hardware structure, the device only provides limited RS485 (4) and Ethernet communication interfaces (2). When the number of RS485 devices that need to be connected increases, the problem of limited resources for access communication ports is faced. Second, communication access must be achieved through communication micro-applications and third-party smart devices deployed in containers. The communication flow chart between micro-applications and data centers is shown in the figure below. Figure 2As shown in the figure, it is often necessary to develop corresponding communication micro-applications for different smart devices. However, the workload and difficulty of developing and deploying micro-applications in smart fusion terminals are large. The above two problems directly restrict the promotion and application value of smart fusion terminals as data integration platforms for substations.

[0008] Based on the above practical needs, a data collection system and method for substations is proposed, which supports heterogeneous communication interfaces and communication protocols while expanding the communication interface. After converting it into a unified standard communication protocol, it is connected to a dedicated communication micro-application adapted to it in the intelligent fusion terminal. In this way, the work flow is simplified and work efficiency is improved. This has become an urgent problem to be solved in this field. Summary of the invention

[0009] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a substation data collection system and method that utilizes a dedicated data collection device as a communication agent of an intelligent fusion terminal, supports heterogeneous communication interfaces and communication protocols while expanding the communication interface, and converts the protocol into a unified standard communication protocol and then connects it to a dedicated communication micro-application adapted to the protocol in the intelligent fusion terminal, thereby simplifying the workflow and improving work efficiency.

[0010] In order to achieve the above-mentioned purpose, the substation data collection system of the present invention has the following structure:

[0011] The substation data collection system includes: a data collection device and an intelligent fusion terminal running communication micro-application software.

[0012] Wherein, the data collection device comprises:

[0013] The data acquisition communication module has multiple physical channels, and realizes communication connection with each physical device through configured communication parameters and communication protocols, and collects data from each connected physical device;

[0014] A communication parameter setting module, used to configure the communication parameters of each physical channel in the data acquisition communication module according to user settings;

[0015] A physical device management module, which is data-connected to the data acquisition communication module, is used to manage the physical device memory linked list associated with each physical device and maintain the data storage area of ​​each physical device;

[0016] A logical device management module, which realizes data connection with the physical device management module through a memory database, is used to manage the logical device memory linked list and maintain the data storage area of ​​each logical device; the logical device corresponds to the physical device one by one, or multiple logical devices are spliced ​​to correspond to one physical device;

[0017] A data forwarding communication module is data-connected to the logic device management module to simulate the establishment of a communication link channel between each logic device and the intelligent fusion terminal running the communication micro-application software through an Ethernet communication interface. The communication micro-application software uses the MQTT protocol to write data to the Internet of Things data center;

[0018] A maintenance management module, used to establish communication with external equipment and edit the data model of the data collection device;

[0019] The model database is respectively connected with the maintenance management module, the physical device management module and the logical device management module to realize data connection, and is used to store the model definition of each physical device and logical device. The model database information is stored in a physical file and has the ability to be saved when power is off;

[0020] The human-computer interaction interface realizes data connection with the communication parameter setting module, the physical device management module and the logical device management module respectively, so as to realize communication parameter configuration, device operation status indication, and operation status monitoring of each physical device and logical device.

[0021] In the substation data collection system, the memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

[0022] In the substation data collection system, the data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel;

[0023] The maintenance management module includes at least one RS232 channel;

[0024] The data forwarding communication module includes at least two Ethernet channels.

[0025] In the substation data collection system, the maintenance management module establishes communication with the external maintenance computer equipment through the RS232 channel, and uses the computer equipment to edit the data model of the data collection device, including the number of physical devices, channel types, communication protocols, communication parameters, and collection data model information point table; the mapping relationship between the number of logical devices, channel types, communication protocols, communication parameters, data model information point table and the physical device collection data model information point table.

[0026] In the substation data collection system, the communication micro-application software runs in the Linux environment of ARM architecture.

[0027] The present invention also provides a method for collecting data of a transformer substation, the method comprising:

[0028] (1) The data collection device reads the configuration file, and uses the human-computer interaction interface to respectively connect the data with the communication parameter setting module, the physical device management module, and the logical device management module, so as to realize the communication parameter configuration, the device operation status indication, and the operation status monitoring of each physical device and the logical device; the communication parameter setting module is used to configure the communication parameters of each physical channel in the data acquisition communication module; the data acquisition communication module realizes the communication connection with each physical device through the configured communication parameters and communication protocol, so as to collect data from each connected physical device; the maintenance management module is used to establish communication with the external device, and edit the data model of the data collection device; the maintenance management module is used to respectively connect the data with the maintenance management module, the physical device management module, and the logical device management module through the model database, so as to store the model definition of each physical device and the logical device;

[0029] (2) The data collection device establishes the logical device memory linked list; uses the physical device management module to connect data with the data acquisition communication module, manages the physical device memory linked list associated with each physical device, maintains the data storage area of ​​each physical device, and uses the logical device management module to achieve data connection with the physical device management module through the memory database, manages the logical device memory linked list, and maintains the data storage area of ​​each logical device; the logical device corresponds to the physical device one-to-one, or multiple logical devices are spliced ​​to correspond to one physical device;

[0030] (3) registering the data collection device in the data center;

[0031] (4) Establishing an Ethernet connection through a data forwarding communication module, using the data forwarding communication module to connect to the logic device management module, and simulating the data collection communication micro-application software in each logic device and the intelligent fusion terminal to establish a communication link channel with the intelligent fusion terminal through an Ethernet communication interface;

[0032] (5) Circularly read logical device data through the logical device management module;

[0033] (6) The intelligent fusion terminal writes data to the Internet of Things data center through the MQTT protocol.

[0034] In the substation data collection method, the configuration file is in json format, the port object is used to define Ethernet communication parameters, the protocol object is used to define communication protocol parameters, the model object is used to define device model parameters, and the devList is used to define a device object linked list.

[0035] In the data collection method for the substation, the memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

[0036] In the data collection method for the substation, the data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel;

[0037] The maintenance management module includes at least one RS232 channel;

[0038] The data forwarding communication module includes at least two Ethernet channels.

[0039] In the data collection method for the substation, the maintenance management module establishes communication with the external maintenance computer equipment through the RS232 channel, and uses the computer equipment to edit the data model of the data collection device, including the number of physical devices, channel types, communication protocols, communication parameters, and collection data model information point tables; the mapping relationship between the number of logical devices, channel types, communication protocols, communication parameters, data model information point tables and the physical device collection data model information point tables.

[0040] The data collection system and method for substations using the invention include a data collection device and an intelligent fusion terminal running communication micro-application software. The data collection communication module in the data collection device is connected to each physical device for data collection; the physical device management module manages the physical device memory linked list associated with each physical device, and the logical device management module manages the logical device memory linked list; the data forwarding communication module simulates the establishment of a communication link channel between each logical device and the intelligent fusion terminal running communication micro-application software through the Ethernet communication interface; the data collection device acts as a communication agent, supports heterogeneous communication interfaces and communication protocols while expanding the communication interface, and converts it into a unified standard communication protocol and then connects it to the dedicated communication micro-application software adapted to it in the intelligent fusion terminal, and then writes data to the Internet of Things data center through the communication micro-application software, so as to simplify the workflow and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the micro-application architecture of the intelligent converged terminal;

[0042] Figure 2 This is a schematic diagram of the communication process between micro-applications and data centers;

[0043] Figure 3 The working principle diagram of the data collection system of the substation of the present invention;

[0044] Figure 4It is a functional logic structure diagram of the data collection device used in the data collection system of the transformer substation of the present invention;

[0045] Figure 5 A hardware structure diagram of a data collection device used in a data collection system for a transformer substation of the present invention;

[0046] Figure 6 The micro-application software workflow diagram of the substation data collection method of the present invention. DETAILED DESCRIPTION

[0047] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0048] See also Figure 3 The figure shows the working principle diagram of the data collection system of the substation of the present invention.

[0049] In one embodiment, the substation data collection system includes: a data collection device and an intelligent fusion terminal running communication micro-application software.

[0050] Wherein, the data collection device is as follows: Figure 4 As shown, including:

[0051] The data acquisition communication module has multiple physical channels, and realizes communication connection with each physical device through configured communication parameters and communication protocols, and collects data from each connected physical device;

[0052] A communication parameter setting module, used to configure the communication parameters of each physical channel in the data acquisition communication module according to user settings;

[0053] A physical device management module, which is data-connected to the data acquisition communication module, is used to manage the physical device memory linked list associated with each physical device and maintain the data storage area of ​​each physical device;

[0054] A logical device management module, which realizes data connection with the physical device management module through a memory database, is used to manage the logical device memory linked list and maintain the data storage area of ​​each logical device; the logical device corresponds to the physical device one by one, or multiple logical devices are spliced ​​to correspond to one physical device;

[0055] A data forwarding communication module is data-connected to the logic device management module to simulate the establishment of a communication link channel between each logic device and the intelligent fusion terminal running the communication micro-application software through an Ethernet communication interface. The communication micro-application software uses the MQTT protocol to write data to the Internet of Things data center;

[0056] A maintenance management module, used to establish communication with external equipment and edit the data model of the data collection device;

[0057] The model database is respectively connected with the maintenance management module, the physical device management module and the logical device management module to realize data connection, and is used to store the model definition of each physical device and logical device. The model database information is stored in a physical file and has the ability to be saved when power is off;

[0058] The human-computer interaction interface realizes data connection with the communication parameter setting module, the physical device management module and the logical device management module respectively, so as to realize communication parameter configuration, device operation status indication, and operation status monitoring of each physical device and logical device.

[0059] In a preferred embodiment, the memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

[0060] In another preferred embodiment, Figure 4 , 5 As shown, the data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel; the maintenance management module includes at least 1 RS232 channel; and the data forwarding communication module includes at least 2 Ethernet channels.

[0061] In a further preferred embodiment, the maintenance management module establishes communication with an external maintenance computer device through the RS232 channel, and uses the computer device to edit the data model of the data collection device, including the number of physical devices, channel type, communication protocol, communication parameters, and collection data model information point table; the mapping relationship between the number of logical devices, channel type, communication protocol, communication parameters, data model information point table and the physical device collection data model information point table.

[0062] In a more preferred embodiment, the communication micro-application software runs in a Linux environment of ARM architecture.

[0063] The present invention also provides a method for collecting data of a transformer substation, the method comprising the following steps:

[0064] (1) The data collection device reads the configuration file, and uses the human-computer interaction interface to respectively connect the data with the communication parameter setting module, the physical device management module, and the logical device management module, so as to realize the communication parameter configuration, the device operation status indication, and the operation status monitoring of each physical device and the logical device; the communication parameter setting module is used to configure the communication parameters of each physical channel in the data acquisition communication module; the data acquisition communication module realizes the communication connection with each physical device through the configured communication parameters and communication protocol, so as to collect data from each connected physical device; the maintenance management module is used to establish communication with the external device, and edit the data model of the data collection device; the maintenance management module is used to respectively connect the data with the maintenance management module, the physical device management module, and the logical device management module through the model database, so as to store the model definition of each physical device and the logical device;

[0065] (2) The data collection device establishes the logical device memory linked list; uses the physical device management module to connect data with the data acquisition communication module, manages the physical device memory linked list associated with each physical device, maintains the data storage area of ​​each physical device, and uses the logical device management module to achieve data connection with the physical device management module through the memory database, manages the logical device memory linked list, and maintains the data storage area of ​​each logical device; the logical device corresponds to the physical device one-to-one, or multiple logical devices are spliced ​​to correspond to one physical device;

[0066] (3) registering the data collection device in the data center;

[0067] (4) Establishing an Ethernet connection through a data forwarding communication module, using the data forwarding communication module to connect to the logic device management module, and simulating the data collection communication micro-application software in each logic device and the intelligent fusion terminal to establish a communication link channel with the intelligent fusion terminal through an Ethernet communication interface;

[0068] (5) Circularly read logical device data through the logical device management module;

[0069] (6) The intelligent fusion terminal writes data to the Internet of Things data center through the MQTT protocol.

[0070] The configuration file is in json format, using the port object to define Ethernet communication parameters, the protocol object to define communication protocol parameters, the model object to define device model parameters, and devList to define a device object list.

[0071] In a more preferred embodiment, the memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

[0072] In a further preferred embodiment, the data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel;

[0073] The maintenance management module includes at least one RS232 channel;

[0074] The data forwarding communication module includes at least two Ethernet channels.

[0075] In a more preferred embodiment, the maintenance management module establishes communication with an external maintenance computer device through the RS232 channel, and uses the computer device to edit the data model of the data collection device, including the number of physical devices, channel type, communication protocol, communication parameters, and collection data model information point table; the mapping relationship between the number of logical devices, channel type, communication protocol, communication parameters, data model information point table and the physical device collection data model information point table.

[0076] In practical applications, the system working principle diagram of the present invention is as follows: Figure 3 As shown, the data collection system is composed of a data collection device, an intelligent fusion terminal structure, various intelligent devices inside and outside the station, and a communication link. The content of the present invention is a data collection device, and a data collection communication micro-application software installed and deployed in the intelligent fusion terminal.

[0077] The collection device provides multiple wired and wireless communication interfaces. The device can access the power meter, reactive power compensation control equipment, environmental monitoring instrument, etc. in the station through the RS485 interface; access the intelligent monitoring equipment of the meter box outside the station through the HPLC power carrier communication method; access the equipment that supports LoRa wireless communication, such as the intelligent monitoring equipment of the cable branch box, through the LoRa wireless communication equipment. The collection device communicates with the intelligent fusion terminal through Ethernet, and realizes the registration of each access device to the physical network platform device through the data collection communication micro-application software deployed in the intelligent fusion terminal, and sends the data of each device to the Internet of Things platform.

[0078] The functional logic structure of the data collection device is as follows: Figure 4 As shown, the data collection device is composed of modules such as human-computer interaction interface, communication parameter setting, data acquisition communication, physical device management, logical device management, data forwarding communication, maintenance management, memory database and model database. Specifically, it includes:

[0079] a) Human-computer interaction interface: realizes functions such as communication parameter configuration, equipment operation status indication, and operation status monitoring of each physical device and logical device.

[0080] b) Communication parameter setting module: The user sets the communication parameters of the device through keyboard operation and human-machine interface display content feedback, including each data acquisition channel, data forwarding communication parameters, etc.

[0081] c) Data acquisition communication module: establishes communication links with each physical channel, and realizes physical device communication and data acquisition through configured communication parameters and communication protocols. Communication protocols support ModbusRTU, IEC60870-5-101, etc.

[0082] d) Physical device management module: manages the physical device memory list, maintains the data storage area of ​​each physical device, and realizes data exchange with the memory database.

[0083] e) Logical device management module: manages the logical device memory list, maintains the data storage area of ​​each logical device, and implements data exchange with the memory database. Logical devices and physical devices can correspond one to one, or multiple logical devices can be spliced ​​into one physical device.

[0084] f) Data forwarding communication module: Through the Ethernet communication interface, it simulates the data collection communication micro-application software in each logical device and the fusion terminal to establish a transparent communication link channel. The data forwarding network communication protocol supports ModbusTCP, IEC60870-5-104, etc.

[0085] g) Maintenance management: Establish communication with the maintenance laptop through the RS232 channel to edit the data model of the aggregation device, including the number of physical devices that need to be connected, channel type, communication protocol, communication parameters, collection data model information point table, etc.; the mapping relationship between the number of logical devices that need to be forwarded, channel type, communication protocol, communication parameters, data model information point table and physical device collection data model information point table, etc.;

[0086] h) Memory database: used to store real-time data information of each physical device and logical device. The memory database information is stored in the memory and is a temporary storage and exchange storage space for real-time data. It does not have the ability to save power when it is powered off. It is initialized and created according to the model database information after the device is powered on and communication with the physical device is established.

[0087] i) Model database: used to store the model definitions of each physical device and logical device. The model database information is stored in physical files and has the ability to be saved during power outages.

[0088] The hardware structure of the data collection device is as follows: Figure 5As shown, it consists of a core MCU, LCD, keyboard, power module, RS232 communication module, 8-way RS485 modules, 1-way HPLC module, 1-way LoRa RF module, and 2-way Ethernet modules.

[0089] The MCU uses a chip that meets the Cortex-M4F architecture, and can use the GD32F303 series.

[0090] The smart converged terminal actually runs in a Linux environment based on the 64-bit ARM architecture. Developers complete software development and testing in the development environment, cross-compile binary programs for the host environment, download them to the smart converged terminal, encrypt and sign them, and then deploy them to the application container.

[0091] The converged terminal data collection micro-application software defines the logical device model that needs to be accessed and the configured communication parameters through the configuration file.

[0092] The workflow of the integrated terminal data collection micro-application software is as follows Figure 6 As shown. The configuration file uses the json format. The port object defines the Ethernet communication parameters, the protocol object defines the communication protocol parameters, the model object defines the device model parameters, and devList defines the specific device object list. The configuration file example is as follows:

[0093]

[0094]

[0095]

[0096]

[0097] The invention is adopted in the data collection system and method for a substation, wherein the system comprises a data collection device and an intelligent fusion terminal running communication micro-application software, wherein a data collection communication module in the data collection device is connected to each physical device for data collection; a physical device management module manages a physical device memory linked list associated with each physical device, and a logical device management module manages a logical device memory linked list; a data forwarding communication module simulates the establishment of a communication link channel between each logical device and the intelligent fusion terminal running communication micro-application software through an Ethernet communication interface; the data collection device acts as a communication agent, supports heterogeneous communication interfaces and communication protocols while extending the communication interface, converts the protocol into a unified standard communication protocol, and then connects the protocol to the dedicated communication micro-application software adapted thereto in the intelligent fusion terminal, and then writes data to the Internet of Things data center through the communication micro-application software, thereby simplifying the workflow and improving work efficiency.

[0098] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A data collection system for a substation, characterized in that: include: Data collection device and intelligent fusion terminal running communication micro-application software, Wherein, the data collection device comprises: The data acquisition communication module has multiple physical channels, and realizes communication connection with each physical device through configured communication parameters and communication protocols, and collects data from each connected physical device; A communication parameter setting module, used to configure the communication parameters of each physical channel in the data acquisition communication module according to user settings; A physical device management module, which is data-connected to the data acquisition communication module, is used to manage the physical device memory linked list associated with each physical device and maintain the data storage area of ​​each physical device; A logical device management module, which realizes data connection with the physical device management module through a memory database, is used to manage the logical device memory linked list and maintain the data storage area of ​​each logical device; the logical device corresponds to the physical device one by one, or multiple logical devices are spliced ​​to correspond to one physical device; A data forwarding communication module is data-connected to the logic device management module to simulate the establishment of a communication link channel between each logic device and the intelligent fusion terminal running the communication micro-application software through an Ethernet communication interface. The communication micro-application software uses the MQTT protocol to write data to the Internet of Things data center; A maintenance management module, used to establish communication with external equipment and edit the data model of the data collection device; The model database is respectively connected with the maintenance management module, the physical device management module and the logical device management module to realize data connection, and is used to store the model definition of each physical device and logical device. The model database information is stored in a physical file and has the ability to be saved when power is off; The human-computer interaction interface realizes data connection with the communication parameter setting module, the physical device management module and the logical device management module respectively, so as to realize communication parameter configuration, device operation status indication, and operation status monitoring of each physical device and logical device.

2. The substation data collection system according to claim 1, characterized in that: The memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

3. The substation data collection system according to claim 1, characterized in that: The data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel; The maintenance management module includes at least one RS232 channel; The data forwarding communication module includes at least two Ethernet channels.

4. The substation data collection system according to claim 3, characterized in that: The maintenance management module establishes communication with the external maintenance computer equipment through the RS232 channel, and uses the computer equipment to edit the data model of the data collection device, including the number of physical devices, channel types, communication protocols, communication parameters, and collection data model information point table; the mapping relationship between the number of logical devices, channel types, communication protocols, communication parameters, data model information point table and the physical device collection data model information point table.

5. The substation data collection system according to claim 4, characterized in that: The communication micro-application software runs in the Linux environment of ARM architecture.

6. A method for collecting data of a substation, characterized in that: The method includes: (1) The data collection device reads the configuration file, and uses the human-computer interaction interface to respectively connect the data with the communication parameter setting module, the physical device management module, and the logical device management module, so as to realize the communication parameter configuration, the device operation status indication, and the operation status monitoring of each physical device and the logical device; the communication parameter setting module is used to configure the communication parameters of each physical channel in the data acquisition communication module; the data acquisition communication module realizes the communication connection with each physical device through the configured communication parameters and communication protocol, so as to collect data from each connected physical device; the maintenance management module is used to establish communication with the external device, and edit the data model of the data collection device; the maintenance management module is used to respectively connect the data with the maintenance management module, the physical device management module, and the logical device management module through the model database, so as to store the model definition of each physical device and the logical device; (2) The data collection device establishes the logical device memory linked list; uses the physical device management module to connect data with the data acquisition communication module, manages the physical device memory linked list associated with each physical device, maintains the data storage area of ​​each physical device, and uses the logical device management module to achieve data connection with the physical device management module through the memory database, manages the logical device memory linked list, and maintains the data storage area of ​​each logical device; the logical device corresponds to the physical device one-to-one, or multiple logical devices are spliced ​​to correspond to one physical device; (3) registering the data collection device in the data center; (4) Establishing an Ethernet connection through a data forwarding communication module, using the data forwarding communication module to connect to the logic device management module, and simulating the data collection communication micro-application software in each logic device and the intelligent fusion terminal to establish a communication link channel with the intelligent fusion terminal through an Ethernet communication interface; (5) Circularly read logical device data through the logical device management module; (6) The intelligent fusion terminal writes data to the Internet of Things data center using the MQTT protocol by running the communication micro-application software.

7. The method for collecting data of a substation according to claim 6, characterized in that: The configuration file is in json format, using the port object to define Ethernet communication parameters, the protocol object to define communication protocol parameters, the model object to define device model parameters, and devList to define a device object list.

8. The method for collecting data of a substation according to claim 6, characterized in that: The memory database is used to temporarily store the real-time data information of each physical device and logical device, and the data exchange between the physical device management module and the logical device management module.

9. The method for collecting data of a substation according to claim 6, characterized in that: The data acquisition communication module includes at least 8 RS485 channels, 1 HPLC channel and 1 LoRa channel; The maintenance management module includes at least one RS232 channel; The data forwarding communication module includes at least two Ethernet channels.

10. The method for collecting data of a substation according to claim 9, characterized in that: The maintenance management module establishes communication with the external maintenance computer equipment through the RS232 channel, and uses the computer equipment to edit the data model of the data collection device, including the number of physical devices, channel types, communication protocols, communication parameters, and collection data model information point table; the mapping relationship between the number of logical devices, channel types, communication protocols, communication parameters, data model information point table and the physical device collection data model information point table.

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