A power distribution master station and power distribution terminal communication system and method based on EPDT

Abstract

The application belongs to the technical field of electric power communication, and particularly relates to a power distribution master station and power distribution terminal communication system and method based on EPDT. The system comprises a core network and a communication terminal corresponding to the power distribution terminal one by one, the communication terminal comprises an EPDT module; the communication terminal is used for wired communication with the corresponding power distribution terminal, and communicates with the core network through the EPDT module; the core network is used for communication connection with the power distribution master station through a wired network; the core network is configured with the ID and port number of all EPDT modules; in the power distribution master station, the IP addresses of all power distribution terminals are configured as the IP address of the core network, and the ports of all power distribution terminals are configured as the port number of the corresponding EPDT module. The application solves the technical problem that the power distribution master station in the prior art cannot configure the ID of the terminal side EPDT, so that the core network cannot accurately judge the destination EPDT of data forwarding.

Description

Technical Field

[0001] This invention belongs to the field of power communication technology, specifically relating to a communication system and method between a distribution master station and a distribution terminal based on EPDT. Background Technology

[0002] According to national and power grid safety regulations, control-related services in distribution automation systems must be strictly carried out using dedicated networks to ensure the security of power monitoring systems and critical data. Traditional distribution network systems use a combination of public wireless networks and dedicated fiber optic networks for control-related services. However, most public wireless networks are 4G, which lacks the "dedicated network for dedicated use" capability, resulting in insufficient security and poor flexibility.

[0003] Conventional 101 protocol power distribution terminal communication methods, such as Figure 1 As shown, the power distribution terminal connects to the wireless router via a serial port. The wireless router and the power distribution master station communicate via a network (public network of the operator) using TCP. The power distribution master station considers the wireless router its communication target, sending downlink data to the wireless router. The wireless router then transmits the data received from the network to the power distribution terminal via the serial port. The power distribution terminal transmits uplink data to the wireless router via the serial port, and the wireless router packages and sends it to the power distribution master station via the network (public network of the operator).

[0004] Traditional distribution master stations communicate with distribution terminals, with one master station connecting to multiple terminals. For the master station, different terminals are distinguished by their IP addresses. However, EPDT communication is not network-based but rather based on an air interface EPDT protocol using IDs. Each EPDT has a unique ID, and the core network also has its own ID. When the core network sends data to an EPDT module, it directs the data to the module with the specified ID. When an EPDT module sends data, it sends it to the core network based on the core network ID. When using EPDT communication between the distribution master station and terminals, the master station sends downlink data to the core network, and the core network forwards the data to the terminal-side EPDT with the specified ID. When multiple distribution terminals are connected to the master station, after the data sent by the master station reaches the core network, the core network cannot accurately determine which terminal-side EPDT the data should be forwarded to. Existing distribution master stations cannot configure the IDs of the terminal-side EPDTs, and modifications would affect existing business communications. Summary of the Invention

[0005] The purpose of this invention is to provide a communication system and method between a distribution master station and a distribution terminal based on an EPDT, so as to solve the technical problem that the distribution master station cannot configure the ID of the terminal-side EPDT, which leads to the core network being unable to accurately determine the destination EPDT for data forwarding.

[0006] To address the aforementioned technical problems, the first aspect of this invention provides a communication system between a distribution master station and distribution terminals based on EPDT, comprising a core network and communication terminals corresponding one-to-one with the distribution terminals. Each communication terminal includes an EPDT module. The communication terminal is used for wired communication with its corresponding distribution terminal and for communication with the core network via the EPDT module. The core network is used for communication connection with the distribution master station via a wired network. The core network is configured with the IDs and port numbers of all EPDT modules; at the distribution master station, the IP addresses corresponding to all distribution terminals are configured to the IP addresses of the core network, and the ports of all distribution terminals are configured to the port numbers of the corresponding EPDT modules. After receiving a connection request from the power distribution master station on a certain port number configured in the core network, the core network forwards the connection request to the communication terminal corresponding to the port number; and after receiving the response information from the power distribution terminal to the connection request, it sends the response information to the power distribution master station. After receiving a connection request, the communication terminal forwards the connection request to the corresponding power distribution terminal; and after receiving the response information, it sends the response information to the core network.

[0007] In one possible implementation, the core network listens on the port numbers of all its configured EPDT modules via a TCP listening service to receive connection requests from the distribution master station.

[0008] In one possible implementation, the process by which the core network forwards the connection request to the communication terminal corresponding to the port number includes: establishing a socket and associating the socket with the power distribution terminal corresponding to the port number; the socket forwarding the connection request to the corresponding EPDT module according to the ID of the EPDT module, so as to forward it to the corresponding communication terminal.

[0009] In one possible implementation, the process of the core network sending the response information to the distribution master station includes: after receiving the response information from the EPDT module, the core network searches for the corresponding socket according to the EPDT module, and sends the response information to the distribution master station through the found socket.

[0010] In one possible implementation, the core network and the distribution master station communicate via the IEC101 protocol, as do the communication terminal and the distribution terminal; the core network and the distribution master station are connected via optical fiber communication, as do the communication terminal and the distribution terminal.

[0011] In one possible implementation, the communication terminal is a CPE.

[0012] To address the aforementioned technical problems, a second aspect of the present invention provides a communication method between a distribution master station and a distribution terminal based on EPDT, the method comprising: S1. After receiving a connection request from the power distribution master station, a certain port number configured in the core network forwards the connection request to the communication terminal corresponding to the port number. S2. After receiving the connection request, the communication terminal forwards the connection request to the corresponding power distribution terminal. S3. After receiving the response information from the power distribution terminal to the connection request, the communication terminal sends the response information to the core network. S4. After receiving the response information, the core network sends the response information to the distribution master station; The communication terminal corresponding to each distribution terminal includes an EPDT module; the communication terminal is used for wired communication with its corresponding distribution terminal and for communication with the core network through the EPDT module; the core network is used for communication connection with the distribution master station through a wired network; The core network is configured with the IDs and port numbers of all EPDT modules; at the distribution master station, the IP addresses corresponding to all distribution terminals are configured to the IP addresses of the core network, and the ports of all distribution terminals are configured to the port numbers of the corresponding EPDT modules.

[0013] In one possible implementation, the core network listens on the port numbers of all its configured EPDT modules via a TCP listening service to receive connection requests from the distribution master station.

[0014] In one possible implementation, the process by which the core network forwards the connection request to the communication terminal corresponding to the port number includes: establishing a socket and associating the socket with the power distribution terminal corresponding to the port number; the socket forwarding the connection request to the corresponding EPDT module according to the ID of the EPDT module, so as to forward it to the corresponding communication terminal.

[0015] In one possible implementation, the process of the core network sending the response information to the distribution master station includes: after receiving the response information from the EPDT module, the core network searches for the corresponding socket according to the EPDT module, and sends the response information to the distribution master station through the found socket.

[0016] In one possible implementation, the core network and the distribution master station communicate via the IEC101 protocol, as do the communication terminal and the distribution terminal; the core network and the distribution master station are connected via optical fiber communication, as do the communication terminal and the distribution terminal.

[0017] In one possible implementation, the communication terminal is a CPE.

[0018] The beneficial effects of this invention are as follows: Under existing conditions, this invention enables communication between the master station and multiple terminals by configuring the EPDT module ID and service port number used by all power distribution terminals requiring communication in the core network. The core network can accurately forward data to the corresponding terminals. No additional modifications to the existing power distribution master station and terminals are required, reducing the difficulty of engineering implementation and improving the feasibility of technology deployment. This invention solves the technical problem in existing technologies where the power distribution master station cannot configure the EPDT ID on the terminal side, leading to the core network's inability to accurately determine the destination EPDT for data forwarding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the conventional 101 protocol power distribution terminal communication method in the existing technology; Figure 2 This is a schematic diagram of the system architecture in the implementation of the EPDT-based communication system between the distribution master station and the distribution terminal of the present invention. Detailed Implementation

[0020] This invention, under existing conditions, enables communication between the master station and multiple terminals by configuring the EPDT module ID and service port number used by all distribution terminals requiring communication in the core network. The core network can accurately forward data to the corresponding terminals. No additional modifications to the existing distribution master station and terminals are required, reducing engineering implementation difficulty and improving the feasibility of technology deployment. This invention solves the technical problem in existing technologies where the distribution master station cannot configure the EPDT ID on the terminal side, leading to the core network's inability to accurately determine the destination EPDT for data forwarding.

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Implementation method of EPDT-based communication system between distribution master station and distribution terminal: This invention proposes a method and system for IEC101 communication between a power distribution master station and a terminal based on EPDT. It uses the EPDT power wireless private network to replace the traditional 4G wireless public network, forming a "wireless private network + fiber optic private network" communication transmission mode for control-related services in the power distribution network system, and realizing secure communication between the power distribution master station and the terminal through the IEC101 protocol via the EPDT power wireless private network.

[0023] Conventional 101 protocol power distribution terminal communication methods, such as Figure 1As shown, the power distribution terminal connects to the wireless router via a serial port. The wireless router and the power distribution master station communicate via a network (public network of the operator) using TCP. The power distribution master station considers the wireless router its communication target, sending downlink data to the wireless router. The wireless router then transmits the data received from the network to the power distribution terminal via the serial port. The power distribution terminal transmits uplink data to the wireless router via the serial port, and the wireless router packages and sends it to the power distribution master station via the network (public network of the operator).

[0024] like Figure 2 As shown, in this invention, the power distribution master station communicates with the EPDT core network via a wired network using the IEC101 protocol. The EPDT core network has an IP address for the power distribution master station to access. The core network is configured with the EPDT module ID and service port used by all power distribution terminals that need to communicate. When the core network receives a connection request from the power distribution master station, it matches the EPDT communication module ID to be communicated with according to the port number and sends the connection request to the corresponding EPDT communication module through the base station. Each distribution terminal is configured with a CPE, which integrates an EPDT communication module. After receiving a connection request from the core network, the EPDT communication module forwards the data to the CPE via a serial port. The CPE then sends the data to the distribution terminal via the serial port using the IEC101 protocol. Upon receiving the request data, the distribution terminal responds by sending the response data back to the CPE via the serial port using the IEC101 protocol. The CPE then forwards the data to the EPDT communication module, which then sends the data to the core network via the base station. The core network then sends the data to the distribution master station via the wired network using the IEC101 protocol, thus realizing IEC101 protocol communication and data exchange between the distribution master station and the distribution terminal.

[0025] Traditional distribution master stations communicate with distribution terminals, with one master station connecting to multiple terminals. For the master station, different terminals are distinguished by their IP addresses. However, EPDT communication is not network-based but rather based on an air interface EPDT protocol using IDs. Each EPDT has a unique ID, and the core network also has its own ID. When the core network sends data to an EPDT module, it directs the data to the module with the specified ID. When an EPDT module sends data, it sends it to the core network based on the core network ID. When using EPDT communication between the distribution master station and terminals, the master station sends downlink data to the core network, and the core network forwards the data to the terminal-side EPDT with the specified ID. When multiple distribution terminals are connected to the master station, after the data sent by the master station reaches the core network, the core network cannot accurately determine which terminal-side EPDT the data should be forwarded to. Existing distribution master stations cannot configure the IDs of the terminal-side EPDTs, and modifications would affect existing business communications.

[0026] Therefore, compared to existing EPDTs, this application identifies different distribution terminals through communication port numbers, without relying on limited frequency points or EPDT ID information. When multiple distribution terminals access the master station through the EPDT, when configuring distribution terminal information at the distribution master station, the IP addresses of all distribution terminals are configured to the core network IP, and different terminals are configured with different communication ports. Existing distribution master stations support configuring terminal IP and port information without additional modifications. The distribution master station can directly consider the core network as the distribution terminal; all distribution terminals have the same IP address, only the service port number is different.

[0027] Configure the EPDT module ID and service port number used by all distribution terminals requiring communication on the core network, and associate the socket for communication between the terminal and the master station. Create a TCP listening service on the core network, listening on the port numbers corresponding to all distribution terminals, waiting to receive connections from the distribution master station. After receiving a connection from the distribution master station, establish a socket and associate the corresponding terminal's socket according to the service port number. After the socket receives downlink data from the distribution master station, it sends it to the corresponding EPDT module according to the matching EPDT module ID. When the core network receives uplink data from the EPDT module, it looks up the socket according to the ID and sends the data to the distribution master station through the socket.

[0028] Implementation method of communication between distribution master station and distribution terminal based on EPDT: A communication method between a distribution master station and a distribution terminal based on EPDT (Electronic Power Distribution Technology) is provided, the method comprising: S1. After receiving a connection request from the power distribution master station, a certain port number configured in the core network forwards the connection request to the communication terminal corresponding to the port number. The core network listens to the port numbers of all its configured EPDT modules via a TCP listening service to receive connection requests from the distribution master station.

[0029] S2. After receiving the connection request, the communication terminal forwards the connection request to the corresponding power distribution terminal. S3. After receiving the response information from the power distribution terminal to the connection request, the communication terminal sends the response information to the core network. The process by which the core network forwards the connection request to the communication terminal corresponding to the port number includes: establishing a socket and associating the socket with the power distribution terminal corresponding to the port number; the socket forwarding the connection request to the corresponding EPDT module according to the ID of the EPDT module, so as to forward it to the corresponding communication terminal.

[0030] S4. After receiving the response information, the core network sends the response information to the distribution master station; After receiving the response information from the EPDT module, the core network searches for the corresponding socket based on the EPDT module and sends the response information to the distribution master station through the found socket.

[0031] The communication terminal corresponding to each distribution terminal includes an EPDT module; the communication terminal is used for wired communication with its corresponding distribution terminal and for communication with the core network through the EPDT module; the core network is used for communication connection with the distribution master station through a wired network; The core network is configured with the IDs and port numbers of all EPDT modules; at the distribution master station, the IP addresses corresponding to all distribution terminals are configured to the IP addresses of the core network, and the ports of all distribution terminals are configured to the port numbers of the corresponding EPDT modules.

[0032] The core network and the distribution master station communicate via the IEC101 protocol, and the communication terminal communicates with the distribution terminal via fiber optic communication. The communication terminal is a CPE.

[0033] This invention has the following characteristics: This invention employs the secure and controllable EPDT power wireless private network technology in the distribution network system, realizing a "wireless private network + fiber optic private network" for control-related services in the distribution network system. This meets the security requirement of "dedicated network for dedicated use," effectively improving the security and reliability level of control-related services in the distribution network system. Furthermore, the EPDT power wireless private network is dedicated to the power grid, allowing for more flexible use of power business communications and enhancing the security and flexibility of business communications.

[0034] Under existing conditions, by configuring the EPDT module ID and service port number used by all distribution terminals requiring communication in the core network, and associating the socket for communication between the terminal and the master station, communication between the master station and multiple terminals can be achieved. The core network can accurately forward data to the corresponding terminals. No additional modifications to the existing distribution master station and terminals are required, reducing the difficulty of engineering implementation and improving the feasibility of technology deployment.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A communication system between a distribution master station and a distribution terminal based on EPDT, characterized in that, It includes a core network and communication terminals corresponding one-to-one with distribution terminals. Each communication terminal includes an EPDT module. The communication terminal is used for wired communication with its corresponding distribution terminal and for communication with the core network through the EPDT module. The core network is used for communication connection with the distribution master station through a wired network. The core network is configured with the IDs and port numbers of all EPDT modules; at the distribution master station, the IP addresses corresponding to all distribution terminals are configured to the IP addresses of the core network, and the ports of all distribution terminals are configured to the port numbers of the corresponding EPDT modules. After receiving a connection request from the power distribution master station, the core network forwards the connection request to the communication terminal corresponding to the port number. Upon receiving the response information from the power distribution terminal regarding the connection request, the response information is sent to the power distribution master station. After receiving the connection request, the communication terminal forwards the connection request to the corresponding power distribution terminal. Upon receiving the response information, the response information is sent to the core network.

2. The EPDT-based communication system between the distribution master station and the distribution terminal according to claim 1, characterized in that, The core network listens to the port numbers of all its configured EPDT modules via a TCP listening service to receive connection requests from the distribution master station.

3. The EPDT-based communication system between the distribution master station and the distribution terminal according to claim 2, characterized in that, The process by which the core network forwards the connection request to the communication terminal corresponding to the port number includes: establishing a socket and associating the socket with the power distribution terminal corresponding to the port number; the socket forwarding the connection request to the corresponding EPDT module according to the ID of the EPDT module, so as to forward it to the corresponding communication terminal.

4. The EPDT-based communication system between the distribution master station and the distribution terminal according to claim 3, characterized in that, The process by which the core network sends the response information to the distribution master station includes: after receiving the response information from the EPDT module, the core network searches for the corresponding socket according to the EPDT module, and sends the response information to the distribution master station through the found socket.

5. The EPDT-based communication system between the distribution master station and the distribution terminal according to claim 1, characterized in that, The core network and the power distribution master station communicate with each other and the communication terminal communicates with the power distribution terminal via the IEC101 protocol; the core network and the power distribution master station communicate with each other and the communication terminal communicates with the power distribution terminal via optical fiber.

6. The EPDT-based communication system between the distribution master station and the distribution terminal according to claim 1, characterized in that, The communication terminal is a CPE.

7. A communication method between a distribution master station and a distribution terminal based on EPDT, characterized in that, The method includes: S1. After receiving a connection request from the power distribution master station, a certain port number configured in the core network forwards the connection request to the communication terminal corresponding to the port number. S2. After receiving the connection request, the communication terminal forwards the connection request to the corresponding power distribution terminal. S3. After receiving the response information from the power distribution terminal to the connection request, the communication terminal sends the response information to the core network. S4. After receiving the response information, the core network sends the response information to the distribution master station; The communication terminal corresponding to each distribution terminal includes an EPDT module; the communication terminal is used for wired communication with its corresponding distribution terminal and for communication with the core network through the EPDT module; the core network is used for communication connection with the distribution master station through a wired network; The core network is configured with the IDs and port numbers of all EPDT modules; at the distribution master station, the IP addresses corresponding to all distribution terminals are configured to the IP addresses of the core network, and the ports of all distribution terminals are configured to the port numbers of the corresponding EPDT modules.

8. The communication method between the distribution master station and the distribution terminal based on EPDT according to claim 7, characterized in that, The core network listens to the port numbers of all its configured EPDT modules via a TCP listening service to receive connection requests from the distribution master station.

9. The communication method between the distribution master station and the distribution terminal based on EPDT according to claim 8, characterized in that, The process by which the core network forwards the connection request to the communication terminal corresponding to the port number includes: establishing a socket and associating the socket with the power distribution terminal corresponding to the port number; the socket forwarding the connection request to the corresponding EPDT module according to the ID of the EPDT module, so as to forward it to the corresponding communication terminal.

10. The communication method between the distribution master station and the distribution terminal based on EPDT according to claim 9, characterized in that, The process by which the core network sends the response information to the distribution master station includes: after receiving the response information from the EPDT module, the core network searches for the corresponding socket according to the EPDT module, and sends the response information to the distribution master station through the found socket.

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