Method, device and use for power distribution network self-healing system communication networking

Abstract

The application discloses a method and device for power distribution network self-healing system communication networking and use, and relates to the technical field of measurement electricity; the method comprises the following steps: dynamic communication; each self-healing terminal obtains a transfer switch; if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a dynamic communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch; the device comprises a dynamic communication module; each self-healing terminal obtains a transfer switch; if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a dynamic communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch; the use comprises reducing the communication delay of the power distribution network self-healing system and reducing the number of communication links; the dynamic communication link is established between the self-healing terminals, the communication delay of the power distribution network self-healing system communication networking is small, and the number of communication links is small.

Description

Technical Field

[0001] This invention relates to the field of electrical measurement technology, and in particular to a method, apparatus, and application for communication networking in a power distribution network self-healing system. Background Technology

[0002] The application, published under CN113541129A, is titled "Adaptive Adjustment Strategy for a 10kV Double-Ring Self-Healing System Based on Dynamic Topology Identification." First, each intelligent terminal is numbered and uploaded to the host computer, enabling global topology generation and obtaining the initial topology structure of the self-healing system. Then, when a new switching station is added or the circuit breaker position changes due to a fault, the self-healing system updates the topology in real time, generating a new dynamic topology and redefining the number of switching stations. Finally, in response to changes in the number of switching station levels, the backup protection settings and sectional backup automatic transfer timings for each switching station are adjusted according to the adaptive adjustment strategy, forming a new protection strategy to adapt to the current topology. This achieves effective protection and reasonable self-healing of the 10kV double-ring network during flexible topology changes. It is applicable to the self-healing and adaptive operation management of 10kV double-ring power supply systems.

[0003] The application, published under CN113702733A, is titled "Synchronous Joint Testing System and Method for State Fitting of Distributed Self-Healing Devices." This system comprises a test backend and multiple test devices. The test backend is communicatively connected to the test devices, and the test devices are connected to the self-healing devices via electrical test conductors. The test backend generates model files, test files, and operation instructions, and controls the test devices through these instructions. It sends the model files and test files to the test devices, receives test result files uploaded by the test devices, compares the test files and test result files, and generates a performance evaluation report for the distributed self-healing device. The test devices receive the model files, test files, and operation instructions, output the fitted action state sequence from the test files to the self-healing device, collect the actual action states of the self-healing device, generate test result files, and upload them to the test backend.

[0004] The authorization announcement number is CN113141009B, entitled "A Decision-Making Method and Apparatus for Open-Loop Power Supply Transfer in a Power Grid." The method includes: scanning the power grid before and after a fault to obtain a target set power supply tree; converting the target set power supply tree into a corresponding original adjacency matrix; searching for independently connected set regions in the original adjacency matrix and removing isolated nodes not connected to backup power supply nodes; constructing the target set adjacency matrix from the independently connected set regions; classifying the target set adjacency matrix based on the different selected backup power supply nodes; encoding the target set adjacency matrix using a genetic algorithm and exhaustively enumerating the potential solutions for each class of target set adjacency matrix. This addresses the technical problem that existing technologies in open-loop power grid fault recovery analysis cannot adapt to arbitrary scenarios.

[0005] Based on the above three patent documents and existing technical solutions, the existing technical solutions are analyzed as follows.

[0006] The emergence and rapid development of 5G communication technology provides an economical and reliable communication method for fault identification and self-healing in power distribution networks. Compared to fiber optic communication, which requires a fiber optic channel between communicating devices, 5G communication uses wireless communication technology. As long as the communication base station signal is available, it can easily realize mutual communication between devices in the area, and theoretically, the communication networking method is very flexible.

[0007] When the wiring of a power distribution network system is relatively complex and there are many devices in the area, establishing and maintaining wireless communication links between every single device in real time would result in an excessive number of communication links. Maintaining a large number of communication links in real time requires more network bandwidth and data traffic, and also places higher demands on the network processing capabilities of each device. Establishing communication links only between adjacent devices and achieving data sharing within the area through cascading data forwarding can significantly reduce the number of communication links. However, due to the relatively high latency of current 5G communication, cascading forwarding will significantly reduce the real-time performance of the data.

[0008] Existing technical problems and considerations: How to solve the technical problems of large communication network delay and a large number of communication links in the self-healing system of the distribution network. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method, device and application for communication networking of distribution network self-healing system, which solves the technical problem that the information interaction delay is large due to the step-by-step forwarding of information in the case of wireless communication in distribution network self-healing system, and that the number of communication links is large due to indiscriminate end-to-end communication networking.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a method for communication networking of a self-healing system in a power distribution network includes a dynamic communication step. The dynamic communication step includes each self-healing terminal searching in real time for the power supply path adjacent to the self-healing terminal, obtaining the open-loop switch where self-healing preparation is completed, and using it as a transfer switch on the power supply path; when a transfer switch is obtained, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained.

[0011] A further technical solution is that, in the dynamic communication step, each self-healing terminal maintains its dynamic communication link in real time, and disconnects the dynamic communication link of the corresponding self-healing terminal when the state of the open loop switch changes.

[0012] A further technical solution includes a static communication step prior to the dynamic communication step. The static communication step includes each self-healing terminal obtaining a static communication link, obtaining the open-loop switch for self-healing preparation, and sharing it.

[0013] A further technical solution is as follows: In the static communication step, each self-healing terminal establishes a communication link with adjacent self-healing terminals based on its topology and IP configuration upon power-up, thus obtaining a static communication link; each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time, and the real-time pole-mounted switch status and self-healing terminal status form real-time shared regional status information; each self-healing terminal sends the regional status to adjacent self-healing terminals through the static communication link and realizes the hierarchical forwarding of the regional status, so that each self-healing terminal can obtain the information shared by other self-healing terminals in real time. The pole-mounted switch status includes voltage, current, and switch position information, and the switch position is either closed or open. A pole-mounted switch in the open position is an open-loop switch; each self-healing terminal, based on the real-time shared regional status information, completes open-loop identification and self-healing preparation work according to the distribution network self-healing logic.

[0014] A device for communication networking of a power distribution network self-healing system includes a dynamic communication module. The dynamic communication module is used for each self-healing terminal to search for the power supply path adjacent to the self-healing terminal in real time, obtain the open-loop switch where self-healing preparation is completed, and use it as a transfer switch on the power supply path. When a transfer switch is obtained, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained.

[0015] A further technical solution is that the dynamic communication module is also used to maintain the dynamic communication link of each self-healing terminal in real time. When the state of the open loop switch changes, the dynamic communication link of the corresponding self-healing terminal of the open loop switch is disconnected.

[0016] A further technical solution includes a static communication module, which is used by each self-healing terminal to obtain a static communication link, obtain the open-loop switch of self-healing preparation completion, and share it.

[0017] A further technical solution involves a static communication module, which, upon power-up, establishes a communication link with adjacent self-healing terminals based on the terminal's topology and IP configuration, thus obtaining a static communication link. Each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time. The real-time pole-mounted switch status and the self-healing terminal status form real-time shared regional status information. Each self-healing terminal sends the regional status to adjacent self-healing terminals through the static communication link, achieving hierarchical forwarding of the regional status. This ensures that each self-healing terminal can obtain information shared by other self-healing terminals in real time. The pole-mounted switch status includes voltage, current, and switch position information, where the switch position is either closed or open. Pole-mounted switches in the open position are open-loop switches. Based on the real-time shared regional status information, each self-healing terminal completes open-loop identification and self-healing preparation according to the distribution network self-healing logic.

[0018] A device for communication networking of a distribution network self-healing system, based on the aforementioned dynamic communication module, further includes a distribution network self-healing system formed by connecting multiple substations, pole-mounted switches, segmented lines, self-healing terminals, and communication devices, wherein the dynamic communication module operates on the self-healing terminal.

[0019] One application involves establishing and obtaining dynamic communication links between self-healing terminals based on the obtained location of the open-loop point switch, in order to reduce communication latency in the distribution network self-healing system and reduce the number of communication links.

[0020] An apparatus for communication networking of a power distribution network self-healing system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to perform the corresponding steps described above.

[0021] An apparatus for communication networking of a power distribution network self-healing system includes a computer-readable storage medium storing a computer program that, when executed by a processor, performs the aforementioned corresponding steps.

[0022] The beneficial effects of adopting the above technical solution are as follows:

[0023] First, a method for communication networking in a distribution network self-healing system includes a dynamic communication step. This dynamic communication step involves each self-healing terminal searching in real time for power supply paths adjacent to it, obtaining the open-loop switch where self-healing preparation is complete, and using it as a transfer switch on that power supply path. When a transfer switch is obtained, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained. This technical solution achieves lower latency and a smaller number of communication links in the distribution network self-healing system communication networking by establishing and obtaining dynamic communication links between self-healing terminals.

[0024] Second, a device for communication networking in a distribution network self-healing system includes a dynamic communication module. This module is used by each self-healing terminal to search in real time for power supply paths adjacent to it, identify the open-loop switch where self-healing preparation is complete, and use it as a transfer switch on that power supply path. When a transfer switch is identified, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained. This technical solution achieves lower latency and a smaller number of communication links in the distribution network self-healing system communication networking by establishing and obtaining dynamic communication links between self-healing terminals.

[0025] Third, one application includes establishing and obtaining dynamic communication links between self-healing terminals based on the obtained location of the open-loop point switch, in order to reduce communication delay in the distribution network self-healing system and reduce the number of communication links.

[0026] See the detailed implementation section for further description. Attached Figure Description

[0027] Figure 1 This is a topology diagram of the power distribution network self-healing system of the present invention;

[0028] Figure 2 It is a topological graph with T103 as the vertex topological structure tree;

[0029] Figure 3 This is a principle block diagram of Embodiment 4 of the present invention;

[0030] Figure 4 This is a principle block diagram of Embodiment 5 of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] Example 1:

[0034] This invention discloses a method for communication networking in a power distribution network self-healing system, comprising the following steps:

[0035] Step 1: When each self-healing terminal is powered on, it establishes a communication link with the adjacent self-healing terminals according to its topology and IP configuration, thus obtaining a static communication link.

[0036] Step 2: Each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time. The real-time pole-mounted switch status and the self-healing terminal status form real-time shared regional status information. Each self-healing terminal sends the regional status to adjacent self-healing terminals through a static communication link and realizes the hierarchical forwarding of the regional status. This is so that each self-healing terminal can obtain the information shared by any other self-healing terminal in real time. The pole-mounted switch status includes voltage, current and switch position information. The switch position is either closed or open. A pole-mounted switch with an open position is an open-loop switch.

[0037] Step 3: Each self-healing terminal, based on the real-time shared regional status information, completes the open-loop point identification and self-healing preparation work according to the distribution network self-healing logic.

[0038] Step 4: Each self-healing terminal searches for the power supply path adjacent to it in real time, obtains the open-loop switch where self-healing is ready, and uses it as the transfer switch on the power supply path.

[0039] Step 5: When each self-healing terminal obtains a power transfer switch, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the power transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the power transfer switch, and a dynamic communication link is obtained to realize point-to-point status information interaction.

[0040] Step 6: Each self-healing terminal maintains its dynamic communication link in real time. When the state of the open loop switch changes, the dynamic communication link of the corresponding self-healing terminal is disconnected.

[0041] Example 2:

[0042] This invention discloses a device for communication networking in a power distribution network self-healing system, comprising a static communication module and a dynamic communication module.

[0043] The static communication module is used by each self-healing terminal to establish a communication link with adjacent self-healing terminals based on its topology and IP configuration upon power-up, thus obtaining a static communication link. Each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time. The real-time pole-mounted switch status and the self-healing terminal status form real-time shared regional status information. Each self-healing terminal sends the regional status to adjacent self-healing terminals through the static communication link, realizing the hierarchical forwarding of regional status. This ensures that each self-healing terminal can obtain information shared by any other self-healing terminal in real time. The pole-mounted switch status includes voltage, current, and switch position information, which is either closed or open. Pole-mounted switches in the open position are open-loop switches. Based on the real-time shared regional status information, each self-healing terminal completes open-loop identification and self-healing preparation according to the distribution network self-healing logic.

[0044] The dynamic communication module is used for each self-healing terminal to search for the power supply path adjacent to it in real time, obtain the open-loop switch where self-healing preparation is completed, and use it as the transfer switch on the power supply path. When each self-healing terminal obtains the transfer switch, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained to realize point-to-point status information interaction. Each self-healing terminal maintains its dynamic communication link in real time. When the status of the open-loop switch changes, the dynamic communication link of the self-healing terminal corresponding to the open-loop switch is disconnected.

[0045] Among them, the static communication module is used to establish and obtain a static communication link, complete the open-loop point identification and self-healing preparation, and obtain the open-loop point switch when the self-healing preparation is completed. The static communication module is existing technology and will not be described in detail here.

[0046] The inventive point of this application is that it uses a combination of static and dynamic communication links to achieve communication between self-healing terminals.

[0047] Static communication link: Based on the distribution network topology, under the premise of minimum communication links, status information is shared through data forwarding at each level, thus forming a static communication link.

[0048] Static communication links are used for user fault location data exchange and for forwarding of pole-mounted switch operating status information.

[0049] Based on the static communication link, the self-healing terminal obtains the open-loop point location and completes the self-healing preparation work.

[0050] Dynamic communication links: Based on the real-time location of the open-loop point, communication links are dynamically established between self-healing terminals. This is used to reduce communication latency in the distribution network self-healing system and decrease the number of communication links.

[0051] If a self-healing terminal using the open-loop point as a transfer path does not have a direct communication link with the self-healing device at that open-loop point, a dynamic communication link is established and maintained in real time for point-to-point status information sharing to eliminate the latency caused by cascading forwarding. When the open-loop point changes, a new dynamic communication link is established and obtained according to the new topology structure tree.

[0052] Example 3:

[0053] like Figure 1 and Figure 2 As shown, this invention discloses a device for communication networking in a distribution network self-healing system, comprising multiple substations, pole-mounted switches, sectional lines, self-healing terminals, and communication devices, as well as static communication modules and dynamic communication modules. The substations are electrically connected to the pole-mounted switches, and one pole-mounted switch is electrically connected to another pole-mounted switch via a sectional line. One self-healing terminal is wired to a corresponding pole-mounted switch and is used to obtain the status of the corresponding pole-mounted switch. A communication device is connected to one self-healing terminal and is used for establishing communication links and data interaction between self-healing terminals. Multiple substations, pole-mounted switches, sectional lines, self-healing terminals, and communication devices are connected to form a distribution network self-healing system. The static communication module and dynamic communication module operate on the self-healing terminal.

[0054] like Figure 1 As shown, the distribution network self-healing system includes the first to fourth substations, the first to twelfth pole-mounted switches B101 to B112, the first to ninth section lines L1 to L9, the first to twelfth self-healing terminals T101 to T112, and the first to twelfth communication devices. The first substation is substation 1, the second substation is substation 2, the third substation is substation 3, and the fourth substation is substation 4. Each pole-mounted switch is connected to a corresponding self-healing terminal, which is used to obtain the status of the corresponding pole-mounted switch. Each communication device is installed on a self-healing terminal and is used to establish communication links and exchange data between self-healing terminals.

[0055] In this system, multiple substations, pole-mounted switches, sectional lines, self-healing terminals, and communication devices are connected to form a distribution network self-healing system. The distribution network self-healing system itself is existing technology and will not be described in detail here.

[0056] The static communication module is the same as the static communication module in Example 2, and the dynamic communication module is the same as the dynamic communication module in Example 2.

[0057] Example 4:

[0058] like Figure 3 As shown, the present invention discloses an apparatus for communication networking of a self-healing system for a power distribution network, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of Embodiment 1.

[0059] Example 5:

[0060] like Figure 4 As shown, the present invention discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in Embodiment 1.

[0061] Example 6:

[0062] This invention discloses a method based on Embodiment 1 for obtaining the real-time location of the open-loop point and dynamically establishing communication links between self-healing terminals, which is used to reduce communication latency in the distribution network self-healing system and reduce the number of communication links.

[0063] Compared to the above embodiments, the program module can also be a hardware module made using existing logic operation technology to implement the corresponding logic operation steps, communication steps and control steps, thereby realizing the above-mentioned corresponding steps. The logic operation unit is existing technology and will not be described in detail here.

[0064] The concept of this application:

[0065] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a 5G communication dynamic networking method suitable for distribution network self-healing systems. This method combines static and dynamic communication links to achieve communication between devices within a region. The static communication links are constructed based on the distribution network topology within the protected area, achieving regional status information sharing through tiered data forwarding with minimal communication links. The dynamic communication links, on the other hand, are dynamically established between relevant devices based on the real-time location of the open-loop point within the region. This method can significantly reduce the number of communication links while ensuring the real-time communication performance of the 5G distribution network self-healing system.

[0066] This invention is achieved through the following technical solution: a dynamic networking method for 5G communication in a power distribution network self-healing system.

[0067] like Figure 1As shown, this method describes the system architecture used, which is a multi-power supply and multi-tie distribution network self-healing system based on 5G communication. The system includes four substations, twelve pole-mounted switches B101 to B112, and nine segmented lines L1 to L9. Each pole-mounted switch is equipped with a terminal device, and the terminal number is consistent with the switch number.

[0068] Each terminal device is equipped with a fixed IP address and a 5G card capable of mutual communication, used for automatic construction of communication links and data exchange between devices. Based on the topology of the protected area and the IP addresses of the corresponding 5G cards for each device, communication links between devices are automatically constructed. According to the topology, static communication links are established between terminal devices directly connected via line segments. These communication links are primarily used for data exchange for user fault location and for forwarding operational status information within the area.

[0069] Under normal operating conditions of the distribution network, and with regional status information sharing based on static communication links, the self-healing system can automatically identify the location of the open-loop point and complete self-healing preparation. Once the open-loop point's self-healing preparation is complete (i.e., self-healing charging is finished), if the terminal equipment using that open-loop point as a transfer path has no direct communication link with the equipment at that open-loop point, a dynamic communication link is automatically established and maintained in real time for point-to-point status information sharing to eliminate the delay caused by cascading forwarding. When the open-loop point changes, links that do not meet the conditions for establishing a dynamic communication link are automatically disconnected after a delay, and a new dynamic communication link is automatically constructed according to principles. The implementation steps of the 5G communication dynamic networking method for the distribution network self-healing system are characterized by the following steps:

[0070] Step 1: When each terminal is powered on, it automatically establishes a communication link with the terminal devices directly connected through line segments, i.e., a static communication link, based on the regional topology and IP configuration.

[0071] like Figure 1 As shown, in the system architecture, terminal T101 establishes a communication link only with terminal T102; terminal T102 establishes communication links with terminal T101 and terminal T103 respectively, and so on.

[0072] Step 2: Each terminal device collects local voltage, current, switch position and other information in real time, and sends the local status information and the status information of other devices in the area to neighboring devices through a static communication link.

[0073] For example, terminal T101 sends its status information to terminal T102; terminal T102 packages the information of terminal T101 and terminal T102 together and sends it to terminal T103. At the same time, terminal T102 packages the information of terminal T102, terminal T103 to T112 together and sends it to terminal T101. And so on, ultimately realizing the sharing of status information of all terminals in the area.

[0074] Step 3: Based on real-time shared regional status information, and in accordance with the distribution network self-healing logic, automatically complete the open-loop point identification and self-healing preparation work.

[0075] like Figure 1 As shown, when the self-healing function is activated and the distribution network is operating normally, switches B107, B109, and B110 are the open-loop switches when self-healing preparation is complete, i.e., self-healing charging is complete.

[0076] Step 4: Each terminal device searches for the power supply path between itself and each power source in real time, and detects whether there is an open-loop switch that has completed self-healing preparation on the power supply path. If there is, the switch is used as the transfer switch on the power supply path. When any switch in the tripped position is detected on the power supply path, the search for that path is stopped.

[0077] like Figure 1 As shown, the T112 terminal can detect that the B110 switch is its transfer switch, and since the B110 switch is in the trip position, it will not continue to search in the direction of the L3 line.

[0078] Step 5: When each terminal detects the power transfer switch, if there is no communication link between the terminal and the terminal corresponding to the power transfer switch, a dynamic communication link will be automatically established between the terminal and the power transfer switch to realize point-to-point status information exchange.

[0079] like Figure 1 As shown, the T112 terminal automatically establishes a dynamic communication link with the T110 terminal, and the T112 terminal sends its own status information to the T110 terminal in real time for self-healing logic judgment.

[0080] Step 6: Each terminal maintains its own dynamic communication link in real time. When the open loop point status changes, the relevant dynamic communication link is automatically disconnected after a delay.

[0081] Peer-to-peer communication strategy based on 5G communication:

[0082] 1. Analysis of peer-to-peer communication strategies for terminal devices within the region

[0083] Peer-to-peer communication is a communication method between devices, as opposed to master-slave communication. In master-slave communication, there is typically a data center responsible for storing and transmitting information within the network, and all terminals in the system communicate with the data center to achieve data exchange between terminals. In peer-to-peer communication, there is no data center, and terminal devices establish point-to-point communication links.

[0084] Compared to master-slave communication, peer-to-peer communication has the following advantages:

[0085] 1) Data and information can flow and be exchanged bidirectionally within the network. Each node can send and receive data and information from the other. The content of the information can be freely defined, making full use of the network's node and communication link resources. At the same time, there is no data center, so there is no need to worry about the risk of the entire system being paralyzed due to the failure of the data center in emergency situations such as natural disasters, thus improving the robustness of the system.

[0086] 2) The network is easy to maintain and expand. Adding or removing a point within the network will not affect the entire network. Only the configuration of the interconnected devices needs to be changed.

[0087] like Figure 1 As shown, there are twelve terminal devices configured in the protected area. Assuming that peer-to-peer communication links are established between each pair of devices, the total number of links is 66, and each terminal device needs to maintain 11 links. For each additional terminal device added to the area, the number of communication links increases by the same number as the original number of devices. Let N represent the total number of terminal devices, and C represent the total number of communication links established between each pair of devices, then: When the number of terminals is large, establishing and maintaining communication links becomes extremely difficult. In the protected area, assuming each device only establishes communication links with its adjacent devices, and information exchange between devices is achieved through data forwarding at each level, the total number of communication links is thirteen, approximately equal to the total number of terminal devices. For single-ring or dual-ring network wiring methods, the total number of communication links... When three- or multi-terminal lines exist, the number of communication links increases to some extent. However, because information between devices needs to be forwarded level by level, the latency of data interaction between devices that are geographically distant will increase significantly. Communication between the T101 terminal and the T108 terminal requires six levels of forwarding, and the interaction latency is seven times that of directly establishing a communication link.

[0088] The above analysis shows that establishing communication links between all devices in the area could result in an excessively large number of communication links, significantly increasing the complexity and workload of STU link maintenance. If a hierarchical forwarding method is used, the data interaction delay between devices that are far apart on the topology will increase, which may affect the speed of fault recovery.

[0089] To minimize the number of communication links and reduce the complexity and workload of STU link maintenance without affecting fault recovery speed, the significance of each pair of communication links needs further analysis. Active distribution network fault identification generally employs longitudinal current differential protection or longitudinal overcurrent directional protection principles, with the upstream protection logic only related to equipment on each side of the protected line. In distributed systems, the transfer of power to the lost load after a distribution network fault is mainly achieved by the equipment at the open-loop point; other equipment at non-open-loop points, besides providing real-time status information, do not perform transfer judgments.

[0090] like Figure 1 As shown, establishing a communication link between terminals T101 and T103 is meaningless, but establishing a link between terminals T101 and T110 can speed up fault recovery. The topology, real-time status, and communication link relationships between devices are shown in Table 1.

[0091] Table 1: Communication Link Relationships Between Self-Healing Terminals

[0092]

[0093] As can be seen from the table above, the number of communication links established based on the necessity of communication links is far less than the total number of communication links established between any two entities. When the open loop point of the protected area changes, each terminal device within the area can disconnect or re-establish the link based on real-time information.

[0094] 2. Dynamic peer-to-peer communication strategy based on topology and real-time status

[0095] For power distribution wiring methods, a topology structure tree can be used to represent the connection relationship between each line segment and equipment in a more intuitive way.

[0096] like Figure 1 As shown, the wiring method, with terminal T103 as the vertex, establishes the following topology structure tree: Figure 2 As shown.

[0097] like Figure 2 As shown, a topology structure tree is established with T103 as the vertex. Each terminal device establishes its own corresponding topology structure tree with itself as the vertex, and then establishes communication links between its child nodes. Terminal T103 establishes communication links with terminals T102, T104, and T110. During the establishment of communication links, the client / server mode is determined according to preset rules. Each terminal device can complete the establishment of static links by following the above method. Static links are only related to the topology structure of the protected area and do not change with the change of the open loop point.

[0098] After a static link is established, information exchange between devices within the area can be achieved by forwarding status information level by level. Under normal system operation, the location and self-healing charging status of each open-loop point are detected in real time based on topology path search. When the self-healing charging of any open-loop point is detected to be complete, all terminal devices on the same electrical island as the open-loop point automatically establish a communication link with the open-loop point for rapid self-healing recovery.

[0099] like Figure 1 As shown, under system operation, assuming that self-healing charging at each open-loop point is complete, terminal T101 needs to establish a dynamic communication link with terminal T109, but terminal T112 does not need to establish a dynamic communication link with terminal T109. When an open-loop point changes or the self-healing charging status changes, the dynamic communication link established with the old open-loop point will be delayed and disconnected to reduce communication maintenance workload.

[0100] The most significant inventive point of this application is:

[0101] The dynamic communication module is used for each self-healing terminal to search for the power supply path adjacent to it in real time, obtain the open-loop switch where self-healing preparation is completed, and use it as the transfer switch on the power supply path. When each self-healing terminal obtains the transfer switch, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained to realize point-to-point status information interaction. Each self-healing terminal maintains its dynamic communication link in real time. When the status of the open-loop switch changes, the dynamic communication link of the self-healing terminal corresponding to the open-loop switch is disconnected.

[0102] Furthermore, the communication device connecting the self-healing terminals is a 5G communication device, which further optimizes the networking effect.

[0103] Alternatively, it can also be achieved using a 4G communication device, as described above.

[0104] The advantage of this application lies in providing a dynamic networking method for 5G communication in a distribution network self-healing system. This method combines static and dynamic communication links to achieve communication between devices within the area. This method can significantly reduce the number of communication links while ensuring the real-time communication performance of the 5G distribution network self-healing system.

Claims

1. A method for communication networking in a self-healing system of a power distribution network, characterized in that: Includes the following steps, Step 1: When each self-healing terminal is powered on, it establishes a communication link with the adjacent self-healing terminals according to its topology and IP configuration, thus obtaining a static communication link. Step 2: Each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time. The real-time pole-mounted switch status and the self-healing terminal status form real-time shared regional status information. Each self-healing terminal sends the regional status to the adjacent self-healing terminal through a static communication link and realizes the hierarchical forwarding of the regional status. This is so that each self-healing terminal can obtain the information shared by any other self-healing terminal in real time. The pole-mounted switch status includes voltage, current and switch position information. The switch position is either closed or open. The pole-mounted switch with the open position is an open-loop switch. Step 3: Each self-healing terminal, based on real-time shared regional status information, completes open-loop point identification and self-healing preparation according to the distribution network self-healing logic; Step 4: Each self-healing terminal searches for the power supply path adjacent to it in real time, obtains the open-loop switch where self-healing is ready, and uses it as the transfer switch on the power supply path. Step 5: When each self-healing terminal obtains the transfer switch, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch and a dynamic communication link is obtained to realize point-to-point status information interaction. Step Six: Each self-healing terminal maintains its dynamic communication link in real time. The self-healing terminal corresponding to the open loop point after a distribution network fault makes a power transfer judgment based on the real-time status information provided by the self-healing terminal that has established a dynamic communication link. When the open loop point changes, the link that does not meet the conditions for establishing a dynamic communication link is automatically disconnected after a delay, and a new dynamic communication link is automatically constructed according to the principles.

2. An apparatus for communication networking in a distribution network self-healing system, used in the method for communication networking in a distribution network self-healing system as described in claim 1, characterized in that: It includes a static communication module and a dynamic communication module. The static communication module is used to establish a communication link with the self-healing terminal adjacent to the self-healing terminal when the self-healing terminal is powered on, according to the topology and IP configuration of the self-healing terminal, and obtain a static communication link. Each self-healing terminal collects and obtains the corresponding pole-mounted switch status in real time. The real-time pole-mounted switch status and the self-healing terminal status form real-time shared regional status information. Each self-healing terminal sends the regional status to adjacent self-healing terminals through a static communication link, realizing the hierarchical forwarding of regional status. This ensures that each self-healing terminal can obtain information shared by other self-healing terminals in real time. The pole-mounted switch status includes voltage, current, and switch position information, indicating whether the switch position is closed or open. Pole-mounted switches in the open position are open-loop switches. Based on the real-time shared regional status information, each self-healing terminal completes open-loop point identification and self-healing preparation according to the distribution network self-healing logic. A dynamic communication module is used for each self-healing terminal to search in real time. The power supply path adjacent to the self-healing terminal obtains the open-loop switch where self-healing preparation is completed and serves as the transfer switch on the power supply path. When the transfer switch is obtained, if there is no communication link between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, a communication link is established between the self-healing terminal and the self-healing terminal corresponding to the transfer switch, and a dynamic communication link is obtained. Each self-healing terminal maintains its dynamic communication link in real time. The self-healing terminal corresponding to the open-loop point after the distribution network fault makes a transfer judgment based on the real-time status information provided by the self-healing terminal that has established a dynamic communication link. When the open-loop point changes, the link that does not meet the conditions for establishing a dynamic communication link is automatically disconnected after a delay, and a new dynamic communication link is automatically constructed according to the principles.

3. The device for communication networking of a self-healing system in a power distribution network according to claim 2, characterized in that: It also includes a distribution network self-healing system formed by connecting multiple substations, pole-mounted switches, segmented lines, self-healing terminals and communication devices, wherein the dynamic communication module operates on the self-healing terminal.

4. The device for communication networking of a self-healing system in a power distribution network according to claim 2, characterized in that: It also includes applications, such as establishing and obtaining dynamic communication links between self-healing terminals based on the obtained open-loop point switch positions, to reduce communication latency in the distribution network self-healing system and reduce the number of communication links.

5. An apparatus for communication networking in a power distribution network self-healing system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, it implements the corresponding steps in claim 1.

6. An apparatus for communication networking in a power distribution network self-healing system, comprising a computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the corresponding steps in claim 1.

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