Network configuration ring detection method and device and network configuration ring switching error prevention control system

Abstract

Embodiments of the present application provide a network joint ring detection method, device and network joint ring transfer error prevention control system. The method comprises: constructing an automation switch core topology model; extending the topology of the automation switch in the automation switch core topology model to the entire domain, connecting the topology to each automation switch and each key node of a common substation to the same power supply area; determining the target power supply area to which the target switch belongs and the real-time on-off state of each automation switch in the target power supply area from each power supply area; after virtually setting the target switch to the on-off state, based on the real-time on-off state of each automation switch in the target power supply area, extending the topology in the target power supply area with the target switch as the extension starting point to obtain the topology extension result; and determining whether the network joint ring is successful based on the topology extension result. The method can at least improve the accuracy and efficiency of network joint ring determination.

Description

Technical Field

[0001] This application relates to the field of power distribution network operation control technology, and in particular to a power distribution network loop-closing detection method, device, and power distribution network loop-closing transfer and anti-misoperation control system. Background Technology

[0002] In the operation of power distribution network loop switching, the existing anti-misoperation control usually adopts manual verification of switch status, or combines electrical quantities and topology analysis to determine the loop status.

[0003] However, in large-scale and complex distribution networks, such solutions often require verification of the entire topology, which results in large topology data redundancy and high computational load for traversal. At the same time, switch status acquisition is susceptible to communication delays and data asynchrony, leading to decreased accuracy in loop closure determination and increased risk of misoperation.

[0004] Therefore, how to improve the accuracy and verification efficiency of loop-closing determination in complex power distribution network loop-to-supply scenarios, and reduce the burden of status acquisition and the risk of false alarms, has become a technical problem that needs to be solved. Summary of the Invention

[0005] This application provides a distribution network loop-connection detection method, device, and distribution network loop-connection transfer power supply prevention and control system to improve the accuracy of judgment and verification efficiency in complex distribution network loop-connection transfer power supply scenarios.

[0006] In a first aspect, embodiments of this application provide a method for detecting a closed loop in a distribution network, including:

[0007] Based on the original global topology data of the distribution network, an automated switch core topology model is constructed, which includes automated switches, key nodes of the distribution network, and substations.

[0008] The automated switches in the core topology model of the automated switches are extended to the whole domain, and the automated switches and key nodes connected to the common substation are divided into the same power supply area.

[0009] In response to the tripping operation request of the target switch to be disconnected, the target power supply area to which the target switch belongs and the real-time opening and closing status of each automatic switch in the target power supply area are determined from each power supply area.

[0010] After the target switch is dummy-set to the open state, based on the real-time open and closed states of each automatic switch in the target power supply area, the target switch is used as the starting point for the extension, and the topology extension result is obtained in the target power supply area.

[0011] Based on the topology extension results, it is determined whether the distribution network has successfully closed the loop.

[0012] Secondly, embodiments of this application provide a power distribution network loop-closing detection device, comprising:

[0013] The model building module is used to build a core topology model of automated switches based on the original full-domain topology data of the distribution network. The core topology model of automated switches includes automated switches, key nodes of the distribution network, and substations.

[0014] The topology extension module is used to extend the topology of the automated switches in the core topology model of the automated switches across the entire domain, connecting the topology to the various automated switches and key nodes of the common substation and dividing them into the same power supply area.

[0015] The request response module is used to respond to the tripping operation request of the target switch to be disconnected, determine the target power supply area to which the target switch belongs from each power supply area, and the real-time opening and closing status of each automatic switch in the target power supply area;

[0016] The result acquisition module is used to set the target switch to a virtual open state, and then, based on the real-time open and closed states of each automatic switch in the target power supply area, use the target switch as the starting point to perform topology extension in the target power supply area and obtain the topology extension result.

[0017] The loop closure determination module is used to determine whether the distribution network loop closure is successful based on the topology extension results.

[0018] Thirdly, embodiments of this application provide a power distribution network loop-connection and power supply protection control system, comprising:

[0019] The core topology construction module is used to construct an automated switch core topology model based on the original full-domain distribution network topology data. The automated switch core topology model includes automated switches, key nodes of the distribution network, and substations.

[0020] The automated switch partitioning module is connected to the core topology construction module. It is used to extend the topology of each automated switch in the whole domain based on the core topology model of the automated switch, divide the automated switches that can be connected to the common substation and the key nodes of the distribution network into the same power supply area, and establish a partitioned topology relationship library.

[0021] The area status batch acquisition module is connected to the automated switch partitioning module and is used to locate the target power supply area to which the target switch belongs based on the partition topology relationship library, and to collect the real-time on / off status of each automated switch in the target power supply area.

[0022] The regional topology verification module is connected to the regional status batch acquisition module and the automated switch partitioning module, respectively. It is used to virtually set the target switch to a split-off state, and take the connection points on both sides of the target switch as the starting point to perform a topology extension traversal on the core topology of the automated switch in the target power supply area to determine whether it can be extended to at least one substation.

[0023] The loop closure determination module is connected to the topology verification module in the area and is used to determine whether the distribution network loop closure is successful based on the topology extension traversal results.

[0024] The interlocking control module, connected to the loop closure determination module, is used to unlock the tripping permission of the target switch to perform the tripping operation when the distribution network loop closure is successful, or to lock the tripping permission of the target switch when the distribution network loop closure fails or there is a power outage.

[0025] The distribution network loop detection method, device, and distribution network loop transfer and anti-misoperation control system provided in this application establish a core topology model, pre-divide the power supply area, and collect real-time status data only for the target power supply area and perform topology extension within the area after virtual disconnection upon receiving a target switch tripping request. This effectively narrows the processing scope of loop detection from the entire network to a local area associated with the target switch, reducing redundant topology traversal and cross-area communication access. At the same time, by directly analyzing the reachability of the bus after disconnection on both sides of the target switch, the system can more accurately identify the impact of intermediate breakpoints, parallel path failures, hidden blocking nodes, and abnormal equipment on power supply continuity, thereby improving the accuracy of judgment, verification efficiency, and alarm location capability in complex distribution network loop transfer scenarios. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figure 1 A flowchart illustrating the distribution network loop detection method provided in this application;

[0028] Figure 2 This is a schematic diagram of the power supply area provided in an embodiment of this application;

[0029] Figure 3 A flowchart for determining the loop closure of the distribution network provided in this application embodiment;

[0030] Figure 4 The present application provides a control method for preventing accidental power outages in a distribution network based on an automated switch zone topology.

[0031] Figure 5This is a schematic diagram of the distribution network loop-closing detection device provided in this application;

[0032] Figure 6 The diagram below illustrates the framework of a distribution network loop-to-supply control system for preventing accidental power outages based on an automated switch zone topology, as provided in this application embodiment.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] Distribution network loop-closing detection technology belongs to the field of distribution network dispatching and operation and power system anti-misoperation control. It is mainly applied to 10 kV and below distribution networks in operation scenarios such as loop-closing power transfer, load transfer, maintenance power switching, and fault isolation. In such scenarios, the power supply network is mainly composed of 10 kV busbars of substations, line sectionalizing switches, tie switches, branch nodes, and some automated switches with remote control capabilities, forming a complex topology with multiple substations, branches, and ties. When implementing loop-closing power transfer, operators often need to first close the tie path and then decide whether to disconnect the original power supply path based on the network connectivity status, thereby achieving a smooth load transfer and maintaining continuous power supply to users. Since this process is directly related to power supply continuity and operational safety, the field mainly relies on the distribution network master station to provide basic topology data, and combines switch remote signaling, telemetry, and operation ticket information to complete loop-closing detection and interlocking judgment. Therefore, distribution network loop-closing detection not only requires accurate identification of the power supply range of the switch to be operated, but also requires rapid determination in complex topologies whether the networks on both sides can be connected to the corresponding power source points to support subsequent tripping unlocking or interlocking control.

[0036] Current distribution network loop closure detection mainly relies on manual verification of switch status or combining electrical quantities such as voltage and current with topology analysis to determine whether a loop closure is valid. In engineering implementation, this often requires first acquiring the entire topology and switch status, then performing connectivity checks across the entire network to confirm whether alternative power supply paths have been formed on both sides of the switch to be disconnected, before deciding whether to allow the tripping operation. For smaller, simpler distribution networks, this method can meet basic needs. However, in large-scale, complex distribution networks, the topology often contains numerous non-automatic switches, redundant connection nodes, auxiliary nodes, and cross-regional connections, resulting in a massive amount of raw data, an excessively large topology traversal range, and frequent cross-regional access to status information during the verification process, significantly increasing communication pressure. Especially during dispatching and operation, switch remote signaling may be affected by communication delays, link jitter, and asynchronous data refreshes, causing discrepancies between the real-time status obtained by the master station and the actual field status, thus leading to delayed or distorted loop closure determination results.

[0037] Furthermore, relying solely on whether the tie switch is closed, without considering the actual topological extension relationship on both sides of the switch to be disconnected, can easily lead to overlooking intermediate breakpoints, parallel paths, or hidden fault nodes, resulting in misjudgments of successful loop closure and subsequent power loss risks when disconnecting the original power supply path. Existing solutions also generally lack zonal management of the power supply range of automated switches. Each operation requires unified verification of the entire topology, increasing computational overhead and making it difficult to directly pinpoint specific failure nodes from alarm results. Operators still need to manually check segment by segment, which is inefficient and prone to overlooking critical anomalies. Therefore, how to balance the accuracy of loop closure determination, the efficiency of topology verification, and the control of status acquisition burden in complex distribution network loop closure and transfer scenarios has become an urgent technical problem to be solved.

[0038] To address the aforementioned issues, this application provides a distribution network loop closure detection scheme. By employing a technical approach centered around core topology, regional division, status acquisition, virtual segmentation, and extended verification within the region, the loop closure judgment can be limited to the target power supply area, reducing redundant calculations and cross-regional communication pressure caused by full-domain traversal. At the same time, it improves the ability to identify the actual connection relationship between the two sides of the target switch, providing a more accurate basis for subsequent anti-misoperation interlocking control.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0040] Figure 1This is a flowchart illustrating the distribution network loop closure detection method provided in this application. The execution entity of this method can be a loop closure detection server deployed on the distribution network master station side, a topology analysis module in the dispatch automation master station, or an analysis system jointly composed of the distribution automation master station and edge computing nodes. Figure 1 As shown, the method includes:

[0041] Step 110: Based on the original global distribution network topology data, construct the core topology model of the automated switch. This core topology model includes automated switches, key nodes in the distribution network, and substations.

[0042] Step 120: Extend the topology of the automated switches in the core topology model of the automated switches to the same power supply area, connecting the automated switches and key nodes of the common substation.

[0043] Step 130: In response to the tripping operation request of the target switch to be disconnected, determine the target power supply area to which the target switch belongs, and the real-time opening and closing status of each automatic switch within the target power supply area from each power supply area.

[0044] Step 140: After setting the target switch to the open state, based on the real-time open and closed states of each automatic switch in the target power supply area, the topology is extended in the target power supply area, taking the target switch as the starting point, and the topology extension result is obtained.

[0045] Step 150: Based on the topology extension results, determine whether the distribution network has been successfully looped.

[0046] Regarding step 110 above, the original global topology data of the distribution network can be understood as a set of basic data reflecting the equipment objects, connection relationships, equipment types, lines, substations, bus relationships, and geographical or logical locations of the equipment in the distribution network. This set of data comes from one or more of the distribution network master station, Geographic Information System (GIS), and Production Management System (PMS).

[0047] Automated switches refer to switchgear with the ability to remotely acquire signals, remotely control, upload status information, or connect to automated terminals. For example, they may include automated devices in feeder switches, sectionalizing switches, tie switches, ring main unit switches, and pole-mounted switches.

[0048] Key nodes in a distribution network refer to nodes that play a role in determining topological connectivity, such as connecting, branching, switching, converging, or identifying boundaries. For example, they may include branch nodes, T-junctions, line connection points, feeder outgoing points, busbar connection points, and logical nodes used to characterize the convergence relationship of multiple branches.

[0049] The substation refers to the substation entity corresponding to the power supply point of the distribution network and its 10 kV bus. The 10 kV bus is used as a power connectivity criterion node in the topology extension.

[0050] In some embodiments, the core topology model may refer to a lightweight topology model for loop closure detection formed by filtering, merging and structuring expression based on the original global topology. It focuses on retaining the effective connection relationships between automated switches, key nodes and substations, but does not retain redundant nodes and auxiliary connection information that are not directly related to this loop closure determination.

[0051] In the specific implementation of step 110 above, non-automatic switches, purely display-type auxiliary nodes, devices without remote signaling capabilities, and redundant intermediate nodes that do not contribute to the current loop closure detection can be filtered out in the original full-domain topology data of the distribution network according to preset rules.

[0052] In cases where the nodes to be eliminated were originally connected in series, edge compression can be performed to directly establish logical connections between adjacent valid nodes in order to maintain the correct connectivity of the original static topology.

[0053] For duplicate links, backfilled incorrect links, and auxiliary branches used only for graphical rendering, filtering can be performed using connection verification and link deduplication rules to form a static connection graph oriented towards loop closure detection. Nodes in the static connection graph must include at least automation switch nodes, critical nodes, and substation bus nodes, and edges must at least represent physical connections or logically equivalent connections between lines.

[0054] Regarding step 120 above, global topology extension can be understood as the process of expanding outward from each automated switch based on static connection relationships on the already constructed core topology model of the automated switch, identifying the set of key nodes that can be reached and their corresponding substation busbar sets.

[0055] In this embodiment, the power supply area refers to a set of regional nodes consisting of automated switches and key nodes that can be connected to the same substation or the same group of common substations in the sense of static topology. This regionalization result is used to subsequently narrow the loop detection range from the entire network to the target area.

[0056] It should be noted that a common substation is not limited to a single substation. In complex distribution networks, it can also be represented as a set of busbars of multiple substations associated with the same static connectivity cluster, used to characterize the composite power supply relationship in scenarios of multi-source interconnection or cross-station power transfer.

[0057] In the specific implementation of step 120 above, after the core topology model is constructed, the topology can be represented as an undirected graph or a graph with attributes, and the automated switch node can be used as the seed node for traversal.

[0058] The traversal method can be breadth-first search, depth-first search, or a combination of disjoint-set pre-clustering and graph traversal, depending on the network size.

[0059] For each automated switch that has not yet completed its regional affiliation identification, you can start from that switch and expand layer by layer along the static connection edge to visit the key nodes connected to it, other automated switches, and bus nodes, until you have traversed all the valid nodes in the same static connected cluster as that switch.

[0060] If only one 10kV busbar from a substation is found during the traversal, the connected cluster can be marked as a single-source power supply area; if multiple 10kV busbars from substations are found, the connected cluster can be marked as a composite power supply area, and the correspondence between each busbar and the connected cluster is recorded. Simultaneously, each node within the area is written with an area identifier, area boundary attributes, and parent busbar set attributes, forming a partitioned topology relation database.

[0061] For the identification of regional boundaries, the connecting switches, bus transfer points or special connection nodes located at the intersection of different static connected clusters can be recorded as boundary nodes.

[0062] Boundary nodes do not affect the basic attribution within the region, but can be used to quickly locate the boundary blockage position when the target switch fails to be detected. For example, if a tie switch is statically connected to the feeder of substation A on one side and statically connected to the feeder of substation B on the other side, the tie switch and its adjacent key nodes can be registered as cross-regional boundary objects, and cross-references can be established in the metadata of each region.

[0063] For complex lines with multiple branches, the static path skeleton from the automatic switch to the bus can be recorded during the traversal process, so that when dynamically extending in subsequent areas, it is not necessary to search for all candidate paths from the entire graph again.

[0064] Regarding step 130 above, the target switch can refer to the switching equipment that the operator plans to perform a tripping operation on. For example, the target switch can be a tie switch, a sectionalizing switch, a transfer switch, or other automated switches whose tripping safety needs to be verified during the loop transfer process.

[0065] The target power supply area refers to the power supply area containing the target switch, which is found based on a pre-established partition topology database.

[0066] Real-time open / close status refers to the open or closed state of each automated switch within the area at the current determination time. Furthermore, the real-time open / close status can also carry a status timestamp, status reliability, remote signaling source identifier, and refresh time to determine whether the current status is sufficient to support loop closure analysis.

[0067] Regarding step 140 above, "virtually setting the target switch to a disconnected state" means that at the logical analysis level, regardless of the actual current remote signaling state of the target switch, it is temporarily treated as disconnected in this connectivity calculation to simulate the network structure after the target switch is tripped. This virtual processing does not change the actual state of the field equipment, nor does it rewrite the original remote signaling of the master station; it is only used for temporary state overlay within the analysis model.

[0068] The starting point for extension can be the adjacent key nodes on both sides of the target switch, or it can be the set of two endpoint nodes corresponding to the target switch, depending on how the topology model represents the switch.

[0069] Topology extension results can refer to the analysis results obtained from both sides of the target switch after it is logically disconnected, based on the real-time opening and closing status within the region, including the set of reachable nodes, the set of reachable substation busbars, the connecting paths, and the blocking locations.

[0070] During the execution of step 140 above, the target switch node and its two end connection nodes are first located on the topology map corresponding to the target power supply area, and the target switch state is overwritten as the disconnected state.

[0071] If the topology model adopts the form of "nodes represent devices and edges represent connections", then the relevant edges of the target switch can be marked as impassable; if the topology model adopts the form of "edges represent switch connection relationships", then the on / off attribute of the corresponding edge can be directly set to off.

[0072] Then, topology extension within the region is performed, starting from both ends of the target switch as the initial nodes. During the extension process, the connection relationship of the automatic switch in the closed position is considered as conductive, and the automatic switch in the open position is considered as blocked.

[0073] In addition, devices with untrusted states can be considered as blocking devices according to security principles, while critical nodes themselves, as connection relay nodes, do not have a blocking effect.

[0074] Finally, continue traversing radially outward along the conductor path until reaching the 10 kV busbar of the substation, encountering blocking equipment, exceeding the boundary of the target power supply area, or finding no new expandable nodes.

[0075] Regarding step 150 above, based on the topology derivation results, it can be determined whether there is at least one valid path to the 10 kV busbar of the substation on the first and second sides of the target switch.

[0076] When there are valid paths on both sides, and there are no switchboards, failed nodes, or untrusted critical devices defined as fatal blockages in the valid paths, the distribution network loop is considered to be successfully closed, and a tripping permission result is generated.

[0077] The tripping permission result can be sent to the anti-misoperation interlocking control module, the human-machine interface prompt module, or the operation ticket execution module to unlock the tripping permission of the target switch, display the "tripping allowed" status, or continue the subsequent switching steps.

[0078] In addition, if there is no valid path on either side, or if a valid path exists but depends on untrusted critical equipment and cannot meet the security criteria, the distribution network is determined to have failed to close the loop, and the tripping and blocking result is output.

[0079] The interlocking results can include the reason for failure, such as "the upstream path of the target switch is interrupted", "the backup supply path has not been formed", "a certain key automation switch is in an abnormal state" or "unable to connect to any substation bus", so that operators can quickly locate the problem.

[0080] The distribution network loop detection method provided in this application establishes a core topology model, pre-divides the power supply area, and collects real-time status data only for the target power supply area and performs topology extension within the area after a virtual disconnection upon receiving a target switch tripping request. This effectively narrows the processing scope of loop detection from the entire network to a local area associated with the target switch, reducing redundant topology traversal and cross-area communication access. Simultaneously, by directly analyzing the reachability of the busbars after disconnection on both sides of the target switch, it can more accurately identify the impact of intermediate breakpoints, parallel path failures, hidden blocking nodes, and abnormal equipment on power supply continuity, thereby improving the accuracy of judgment, verification efficiency, and alarm location capabilities in complex distribution network loop transfer scenarios.

[0081] Based on the above embodiments, in some embodiments, the core topology model of the automated switch can be constructed through the following steps:

[0082] Step 11: Perform data cleaning and filtering operations on the original global topology data of the distribution network to eliminate non-core devices.

[0083] Non-core equipment includes at least one of non-automatic switches, redundant equipment, and auxiliary nodes.

[0084] Step 12: Based on the original global topology data of the distribution network after removing non-core devices, construct the core topology model of the automated switch.

[0085] In this embodiment, the original global topology data of the distribution network is obtained by aggregating the master station topology database, geographic information system ledger, production management system equipment files and remote signaling associations, including node identifiers, branch connection relationships, equipment types, operating voltage levels and feeder information.

[0086] Non-automatic switches refer to manual switches, disconnect switches, and other equipment that do not have remote control capabilities or participate in automatic decision-making logic.

[0087] Redundant devices refer to records of the same physical device that are repeatedly registered in different data sources, or backup records that do not contribute new information to connectivity analysis.

[0088] Auxiliary nodes are virtual nodes that are used only for ledger transitions, temporary markings, or display positioning and do not correspond to actual primary devices.

[0089] In this embodiment, the original global topology data is first standardized by mapping the number, name and type of the same device in different systems to a preset format, and the missing fields, duplicate records and abnormal connection relationships are checked.

[0090] Then, based on the device type label, control attribute label, and communication access attribute, nodes that do not belong to the automatic switch are filtered out.

[0091] For records that form duplicate connected edges in the topology, one connection consistent with the actual physical path is retained, and the remaining redundant links are deleted; while for auxiliary nodes that only carry descriptive information and do not participate in electrical connectivity calculations, the node and its associated unnecessary edges are removed, thus obtaining cleaned topology data that retains only the automatic switches and their effective connection relationships.

[0092] Then, based on the cleaned topology data, a core topology model for the automated switch is constructed.

[0093] The core topology model for building automated switches can be represented using a graph structure. Nodes in the core topology model represent automated switches and key connection objects related to loop closure determination, while edges represent static connection relationships between devices. These edges can be written into a graph database for subsequent region partitioning and topology extension.

[0094] This application's embodiments, by constructing a core topology model for automated switches, can significantly reduce the topology scale and the amount of computation for invalid connections, thereby reducing the communication and computing power consumption caused by point-to-point traversal of the entire domain data. Simultaneously, it reduces the risk of misjudgment introduced by duplicate records, auxiliary nodes, or non-automated switches. Because the core topology model focuses more on the actual control relationships of automated switches, subsequent loop closure detection can more quickly locate the target power supply area and key connectivity links, improving judgment accuracy and enhancing the adaptability to anti-misoperation control in complex distribution network scenarios.

[0095] Furthermore, based on the above embodiments, in some embodiments, when extending the global topology of the automated switches in the core topology model of the automated switches, the automated switches in the core topology model of the automated switches can be virtually treated as wires, and the global topology extension of the automated switches can be performed with static connection relationships.

[0096] In this embodiment, the automated switch is virtualized as a wire, which means that in the topology calculation, the automated switch is equivalent to an edge with connectivity, instead of being treated as an independent node that interrupts the topology traversal. This allows the topology extension to continue to expand along the connectivity on both sides of the switch.

[0097] In addition, static connection relationships refer to the node adjacency relationships that are pre-fixed in the original global topology data of the distribution network. These relationships can be generated from GIS, PMS or master station ledger data and written into the graph structure during topology modeling. They are used to represent the fixed connection paths between automated switches and upstream and downstream nodes.

[0098] In this embodiment, the original global topology data of the distribution network is first read, and a graph model is constructed based on the adjacency relationship between nodes, branches and switches. Then, the automated switches in the graph model are mapped as conducting edges, so that the corresponding line segments appear as continuous connected channels in the topology search.

[0099] Subsequently, the core topology model is traversed globally based on the static connection relationship, and nodes that can be connected via the conducting edge are included in the same connected domain, thereby completing the global topology extension of the automated switch.

[0100] For automated switches located in interconnected or segmented positions, after being virtually represented as conductors, it is possible to further identify whether their upstream and downstream nodes are respectively connected to different substation busbars or key nodes within the same power supply area, in order to form a complete regional connectivity result.

[0101] The embodiments of this application make the traversal range of the core topology model of the automated switch clearer, and the connectivity analysis is less likely to be blocked by the attributes of the switch entities. This reduces the number of repeated searches and cross-region visits, and improves the efficiency of global topology extension. At the same time, since the topology extension is based on static connection relationships, the region division results are more stable, which can provide a more accurate topological basis for subsequent loop closure determination and reduce the risk of connectivity misjudgment caused by real-time state fluctuations.

[0102] Figure 2 This is a schematic diagram of the power supply area provided in the embodiments of this application, such as... Figure 2 As shown, the automated switches and their topology between substations A and B constitute one power supply area. The automated switches and their topology between substations B and C constitute another power supply area.

[0103] Furthermore, in some embodiments, after the power supply area is divided, the regional affiliation relationship of each automatic switch in the core topology model of the automatic switch can be constructed based on the automatic switches existing in each power supply area, and stored in categories.

[0104] In this embodiment, the power supply area refers to the set of topologies in the core topology that can be traced back to the same substation power supply point along static connectivity relationships, which is used to limit the scope of subsequent status queries and connectivity verification.

[0105] Among them, the regional affiliation relationship refers to the mapping relationship between the automatic switch and the power supply area, which can represent the area number, substation number and area type to which a certain automatic switch belongs, thus facilitating rapid location.

[0106] In this embodiment, after the power supply area is divided, the registered automatic switches in each power supply area are associated with the corresponding area identifier to form an area affiliation mapping table in the core topology model of the automatic switches.

[0107] For example, the mapping table can be stored in a relational database, a memory cache, or a partitioned topology database, and can be categorized and organized according to power supply area number, substation number, or line segment number, so as to quickly retrieve the area to which the target switch belongs when a tripping request is received.

[0108] Furthermore, for situations where multiple automated switches exist within the same area, they can be uniformly written into the same classification set, and their adjacent nodes, upstream power supply points, and downstream connectivity segments can be recorded simultaneously to ensure that the attribution information is consistent with the topology. When the distribution network topology is adjusted, the area identifier can also be rewritten based on the latest connectivity relationships to avoid inconsistencies between the attribution information and the actual power supply range.

[0109] This application's embodiments establish and categorize regional affiliations, allowing for direct location of the target switch's power supply area during loop closure detection. The system then retrieves status data from that area for connectivity assessment, reducing the overall search scope, minimizing communication overhead, and improving the speed of identifying the target switch's power supply range. Furthermore, it enables rapid association of alarm or interlocking results with specific power supply areas and automated switches, facilitating operator identification of anomaly sources and enhancing the accuracy and efficiency of distribution network loop closure detection.

[0110] In addition, after the power supply area is divided, the topology extension results can be obtained through the following steps: Step 21: Obtain the first connection point and the second connection point on both sides of the target switch; Step 22: Take the first connection point as the first extension starting point and the second connection point as the second extension starting point, and perform topology extension in the target power supply area respectively to determine whether the first connection point and / or the second connection point can be extended to the substation in the target power supply area.

[0111] Refer to the above Figure 2 The first connection point and the second connection point can correspond to respectively Figure 2 Connection points P1 and P2 at the target switch.

[0112] In this embodiment, a local topology map corresponding to the target power supply area can be established first based on the real-time on / off status of each switch within the target power supply area.

[0113] Then, the target switch is dummy set to the open state in the topology diagram to avoid mistakenly including the original closed relationship in the connection result.

[0114] Subsequently, the first and second connection points are extracted from both sides of the target switch and used as independent search starting points. The search proceeds by traversing the line connections within the local topology graph. During the traversal, if the automated switch passed through is in the closed position, the path continues to extend upstream or downstream; if a switch in the open position is encountered, the path is determined to be blocked and the extension stops.

[0115] When the connection relationship of the first connection point or the second connection point within the target power supply area can be traced back to the substation bus, the corresponding side can be output as an extension result that is connected to the substation; if a side cannot be extended to the substation, the extension result that is not connected to the substation will be output.

[0116] The embodiments of this application employ the aforementioned topology extension method, which can verify the connectivity between both sides of the target switch and the substation separately, avoiding misjudgments caused by relying solely on single-sided connectivity information. Furthermore, since the extension range is limited to the target power supply area, the computational burden and communication overhead caused by global traversal are reduced. Simultaneously, it can more accurately identify intermediate breakpoints, parallel paths, and hidden blocking nodes, improving the accuracy and real-time performance of loop detection.

[0117] Furthermore, Figure 3 The flowchart for determining the distribution network loop closure provided in the embodiments of this application is as follows: Figure 3 As shown, it includes the following steps:

[0118] Step 310: Obtain and clean the original topology, and construct the core topology model of the automated switch;

[0119] Step 320: Based on the core topology extension, divide the power supply area according to the common substation;

[0120] Step 330: Receive the tripping operation request and obtain the real-time opening and closing status of all switches in the power supply area in batches;

[0121] Step 340: The switch to be disconnected is dummy-set to open state, and topology derivation verification is performed within this power supply area;

[0122] Step 350: Determine whether both connection points can be extended to the 10 kV busbar of the substation;

[0123] Step 360: Implement the anti-malfunction control strategy.

[0124] In this embodiment, if both connection points on both sides of the target switch can be topologically extended to at least one substation, the distribution network is determined to be successfully closed; if at least one connection point is not topologically extended to at least one substation, the distribution network is determined to be not closed or there is a power outage.

[0125] Specifically, if any of the connection points on both sides can be extended to the substation along an effective conduction path, the connection point is considered to have power supply connectivity; when both connection points on both sides meet this condition, it indicates that stable power supply paths have been formed on both sides of the target switch, and the loop closing condition is met.

[0126] If any connection point encounters a switch disconnection, missing node, interrupted path, or inability to continue connecting to the substation during the extension process, it indicates that the power supply link on that side has not been formed, and the distribution network will be judged as not closed loop or as having a power outage.

[0127] The distribution network loop closure determination method provided in this application limits loop closure verification to the actual power supply reachability on both sides of the target switch, rather than solely relying on the closed state of the tie switch. This avoids misjudgments caused by intermediate breakpoints, hidden fault points, or incorrect remote signaling. Furthermore, this method can quickly locate the disconnected side in complex multi-tie distribution networks, facilitating dispatchers to verify the corresponding branch or power path, thus improving the accuracy of loop closure detection and fault identification capabilities.

[0128] In addition, please continue to refer to the above. Figure 3 In some embodiments, if the distribution network is successfully closed, the tripping permission of the target switch is unlocked to perform the tripping operation; if it is determined that the distribution network is not closed or there is a power outage, the tripping permission of the target switch is locked and an alarm prompt is output.

[0129] In this embodiment, the tripping permission of the target switch is used to characterize whether the target switch is allowed to enter the tripping execution state. Unlocking the tripping permission means canceling the system's prohibition control on the tripping command, so that the master station remote control, field operation ticket or interlocking control can continue to release the tripping command.

[0130] Lockout of tripping authority refers to maintaining the tripping command interception state, preventing the tripping operation from being executed.

[0131] In addition, a successful network loop closure indicates that a connection that satisfies the continuity of power supply has been formed on both sides of the target switch to be disconnected, while a power outage indicates that there is an abnormal state of power interruption, branch voltage loss, or incomplete connection path in the target power supply area.

[0132] In this embodiment, after receiving the loop closing determination result, the distribution network loop closing and power supply protection control system associates and verifies the loop closing determination result with the permission table of the target switch. When the loop closing is determined to be successful, an unlocking command is sent to the permission management unit. The permission management unit can release the tripping permission by canceling the electronic interlocking flag, writing the allow bit, or updating the operation ticket status, and send the tripping permission result back to the dispatch interface so as to execute subsequent tripping operations.

[0133] If the system determines that the circuit is not closed or there is a power outage, the distribution network closed-loop transfer and power supply protection control system will keep the target switch in the locked state and generate an alarm message on the monitoring interface.

[0134] The alarm information may include the target switch number, abnormal power supply area, disconnected connection point, and power failure indicator, so that maintenance personnel can locate the cause.

[0135] This embodiment of the application releases the tripping command after successful loop closure, allowing the original power supply path to be disconnected when safety conditions are met, thereby completing the load transfer. Maintaining tripping interlocking in the absence of loop closure or in the event of power failure avoids user power outages and equipment risks caused by accidental disconnection. Furthermore, since access control is directly triggered based on topology connectivity results, loop closure determination and anti-misoperation interlocking can be linked, improving the safety and reliability of distribution network transfer operations and reducing the burden of manual verification.

[0136] In addition, in some embodiments, at least one of the following can be displayed on the interactive interface: the core topology model of the automated switch, the partition topology relationship of each power supply area, and the real-time opening and closing status, loop closure determination result, and alarm prompt of the automated switch in the power supply area.

[0137] In this embodiment, the partition topology is used to characterize the boundary range of each power supply area and the association of its internal nodes.

[0138] Real-time open / close status is used to reflect the current open or closed position of automated switches within the power supply area.

[0139] The loop closure determination result indicates whether the distribution network corresponding to the target switch meets the loop closure conditions. Alarm prompts are used to output alert messages to operators when an anomaly is detected, power supply is interrupted, or the circuit breaker is tripped and locked.

[0140] The interactive interface can be set in the distribution network master station monitoring terminal, dispatch operation terminal or dedicated topology display terminal, and present the model diagram, area boundary, status indicator and alarm indicator in a graphical way so that the operators can view it intuitively.

[0141] In this embodiment, after completing topology modeling, power supply area division, and target switch status acquisition, the distribution network loop-connection power supply anti-misoperation control system writes the corresponding data into the interface display module, which then displays and controls the data according to preset rendering rules.

[0142] The interface display module can draw the core topology model of the automated switch in the form of a topology diagram, and distinguish nodes belonging to the same power supply area by using the same area background color or boundary line. At the same time, the automated switches in the closed position are marked with the first color, and the automated switches in the open position are marked with the second color, so as to distinguish the equipment status.

[0143] When the loop closure determination result is successful, the interface can simultaneously display a prompt message indicating that the circuit breaker can be opened; when the loop closure determination result is that the loop is not closed or there is a power outage, an alarm icon, flashing prompt or text description can be superimposed at the corresponding switch or interruption path to indicate the abnormal location.

[0144] The embodiments of this application, through the above-described display method, can centrally display information that was originally scattered in the main station, GIS and status acquisition system, reduce the cost of manual comparison, reduce the probability of misjudgment caused by information fragmentation, and make the success or failure of loop closure, whether the circuit breaker is locked and the abnormal location can be intuitively perceived, thereby improving the accuracy, timeliness and anti-misoperation control effect of distribution network loop closure detection.

[0145] Figure 4 The distribution network loop-to-supply interruption prevention control method based on automated switch zone topology provided in this application includes the following steps:

[0146] Step 1: Obtain the original distribution network topology and clean the data to build the core topology model of the automated switch.

[0147] In this step, raw full-domain topology data is obtained from the distribution network automation master station, GIS, and PMS system, and the data is cleaned and filtered: non-automatic switches, redundant equipment, and useless auxiliary nodes are removed, and only the connection relationships of automatic switches, key connection nodes, and substation 10 kV busbars are retained.

[0148] Construct a cleaned core topology model of the automated switch, which only includes the topological association between the automated switch and the node, without loading any real-time open / closed status of the switch, focusing on the core connection relationship of the automated switch, and reducing the size of the topology data.

[0149] Step 2: Based on the core topology, only extend the topology of the automated switches and divide the area according to the common power supply substation.

[0150] In this step, based on the core topology of the automated switches, without considering the real-time status of any switches, the entire topology of all automated switches is extended based solely on static connection relationships. Automated switches and associated nodes that can be connected to the same (or multiple) 10 kV busbar of a substation through static topology extension are divided into the same power supply area. After traversal, multiple sets of area-automated switch-substation ownership relationships are formed, and a partitioned topology relationship library is established to enable equipment to be classified by power supply domain, allowing for repeated reuse after a single division.

[0151] Step 3: Receive the tripping operation request of the switch to be disconnected, and obtain the real-time status of switches in this area in batches.

[0152] In this step, when a tripping operation request for a switch to be disconnected is received, the power supply area of ​​the automated switch to which the switch belongs is located according to the partition topology database; the real-time opening and closing status of all automated switches in the area is collected in batches and cached, and the status of irrelevant equipment outside the area is not collected to reduce the amount of communication and data processing.

[0153] Step 4: Virtually set the switch to be disconnected, and perform topology extension verification only within this area.

[0154] In this step, the switch to be disconnected is virtually set to open position and regarded as open circuit to avoid misjudging it as closed circuit. Starting from the nodes on both sides of the switch, the topology extension traversal is only performed on the core topology of the automation switch in its own area, without crossing areas or traversing the entire domain. The traversal is based on the real-time status of the switch in this area that has been cached in step 3. When the switch is closed, it is conducting; when it is open, it is blocking. The extension stops when it reaches the 10kV bus of the substation.

[0155] Step 5: Successful loop closure is determined.

[0156] In this step, based on the topology extension traversal results of the two side nodes, it is determined whether both side nodes can be independently extended to at least one 10 kV busbar of a substation:

[0157] (1) If both side nodes can independently reach the 10 kV bus of the substation through topology extension traversal, it is determined that the current distribution network has been successfully closed, and both sides of the switch to be disconnected have effective power supply paths. Disconnecting the switch to be disconnected will not cause power outage for users.

[0158] (2) If any side node cannot be connected to the 10 kV bus of the substation through topology extension traversal, it is determined that the distribution network is not closed or there is a power supply interruption. At this time, disconnecting the switch to be disconnected will cause the user to lose power.

[0159] Step 6: Perform the anti-malfunction control operation.

[0160] In this step, if the loop is successfully closed, the system unlocks the tripping permission of the switch to be disconnected, allowing the operator to perform the tripping operation; if the loop is not closed or there is a break, the system forcibly blocks the tripping operation of the switch to be disconnected and pops up an alarm prompt, clearly informing the operator that "the loop is not closed, and the switch must not be disconnected" and the possible reasons for the loop not being closed, that is, reminding the switch that the topology failed and was shut down, so that the operator can quickly troubleshoot the problem.

[0161] Figure 5 This is a schematic diagram of the distribution network loop-closing detection device provided in this application, as shown below. Figure 5 As shown, the distribution network loop closure detection device 50 provided in this embodiment includes:

[0162] Model building module 510 is used to build the core topology model of automated switches based on the original global topology data of the distribution network.

[0163] The core topology model of the automated switch includes automated switches, key nodes of the distribution network, and substations.

[0164] The topology extension module 520 is used to extend the topology of the automated switches in the core topology model of the automated switches across the entire domain, connecting the topology to the various automated switches and key nodes of the common substation and dividing them into the same power supply area.

[0165] The request response module 530 is used to respond to the tripping operation request of the target switch to be disconnected, determine the target power supply area to which the target switch belongs from each power supply area, and the real-time opening and closing status of each automatic switch in the target power supply area.

[0166] The result acquisition module 540 is used to, after setting the target switch to the open state, perform topology extension in the target power supply area based on the real-time open and closed states of each automatic switch in the target power supply area, taking the target switch as the extension starting point, and obtain the topology extension result.

[0167] The loop closure determination module 550 is used to determine whether the distribution network loop closure is successful based on the topology extension results.

[0168] In one possible implementation, the result acquisition module can be specifically used to: acquire the first connection point and the second connection point on both sides of the target switch; use the first connection point as the first extension starting point and the second connection point as the second extension starting point to perform topology extension in the target power supply area, and determine whether the first connection point and / or the second connection point can be extended to the substation in the target power supply area.

[0169] In one possible implementation, the loop closure determination module can be used to: determine that the distribution network is successfully closed if the connection points on both sides of the target switch can be topologically extended to at least one substation; and determine that the distribution network is not closed or there is a power outage if at least one connection point is not topologically extended to at least one substation.

[0170] In one possible implementation, the distribution network loop closure detection device further includes a prompting module, which is used to unlock the tripping permission of the target switch to perform the tripping operation if the distribution network loop closure is successful; if it is determined that the distribution network is not closed or there is a power outage, the tripping permission of the target switch is locked and an alarm prompt is output.

[0171] In one possible implementation, the topology extension module can be used to: virtualize the automated switches in the core topology model of the automated switch as wires, and extend the topology of the automated switches globally with static connection relationships.

[0172] In one possible implementation, the model building module can be used to: perform data cleaning and filtering operations on the original full-domain topology data of the distribution network to remove non-core devices; and build an automated switch core topology model based on the original full-domain topology data of the distribution network after removing non-core devices.

[0173] Non-core equipment includes at least one of non-automatic switches, redundant equipment, and auxiliary nodes.

[0174] In one possible implementation, the distribution network loop detection device also includes a classification and storage module, which is used to construct the regional affiliation relationship of each automatic switch in the core topology model of the automatic switch based on the automatic switches existing in each power supply area, and classify and store them.

[0175] In one possible implementation, the distribution network loop detection device further includes a display module, which displays at least one of the following on the interactive interface: the core topology model of the automatic switch, the partition topology relationship of each power supply area, the real-time opening and closing status of the automatic switches in the power supply area, the loop determination result, and the alarm prompt.

[0176] The distribution network loop detection device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0177] Figure 6 The framework diagram of the distribution network loop-to-supply protection control system based on automated switch zone topology provided in this application embodiment is as follows: Figure 6 As shown, it includes:

[0178] The core topology construction module 61 is used to clean and filter the original distribution network topology data, remove non-automatic switches, redundant equipment and useless auxiliary nodes, retain only the connection relationships of automatic switches, key connection nodes and 10 kV busbars of substations, and construct the core topology model of automatic switches without loading any real-time opening and closing status of switches.

[0179] The automated switch partitioning module 62 is used to extend the topology of all automated switches based on the core topology model of the automated switches, without considering the real-time status of any switches, and only based on the static topology connection relationship. It divides the automated switches and associated nodes that can be connected to the 10 kV busbar of the same (or multiple) substation into the same power supply area, establishes a partitioned topology relationship library, and realizes the classification of equipment according to the power supply domain.

[0180] The area status batch acquisition module 63 is used to receive the tripping operation request of the switch to be disconnected, locate the power supply area to which the switch belongs according to the partition topology relationship library, collect the real-time opening and closing status of all automatic switches in the area at one time and cache it, and do not collect the status of irrelevant equipment outside the area, thereby reducing communication and data processing overhead.

[0181] The topology verification module 64 in the region is used to virtually set the switch to be disconnected as a break and regard it as an open circuit. Starting from the nodes on both sides of the switch, it only performs topology extension traversal on the core topology of the automated switch in its region. Based on the region status, it batch obtains the real-time status of the switch cached by the module, determines whether the path is conductive, and stops traversing when it extends to the 10 kV bus of the substation.

[0182] The loop closure determination module 65 is used to determine whether the nodes on both sides of the switch to be disconnected can be independently extended to at least one 10 kV busbar of a substation based on the traversal results of the topology verification module in the area, and output the determination result of whether the loop closure is successful or not / there is a breakpoint.

[0183] The anti-misoperation interlocking control module 66 is used to receive the judgment result of the loop closing judgment module. If the loop closing is successful, the opening permission of the switch to be disconnected is unlocked; if the loop is not closed or there is a break, the opening operation of the switch to be disconnected is forcibly locked and an alarm is triggered to clearly inform the operator of the switch information of the failure to close the loop and the topology failure to cut off.

[0184] The human-machine interaction module 67 is used to display the core topology model of the automated switch, the partition topology relationship, the real-time status of the switches in the area, the loop closure judgment result and alarm prompts, receive the operator's request to open the switch to be disconnected, and provide an operation interaction interface.

[0185] This application also provides an electronic device, including at least one processor and a memory. Optionally, the electronic device further includes a communication component. The processor, memory, and communication component are connected via a bus.

[0186] In a specific implementation, at least one processor executes computer execution instructions stored in memory, causing at least one processor to perform the above-described method.

[0187] The specific implementation process of the processor can be found in the above method embodiments, and its implementation principle and technical effect are similar, so it will not be repeated here.

[0188] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0189] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0190] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0191] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0192] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0193] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0194] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0195] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0196] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0197] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0198] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0199] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0200] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for detecting loop closures in a power distribution network, characterized in that, include: Based on the original global topology data of the distribution network, an automated switch core topology model is constructed, which includes automated switches, key nodes of the distribution network, and substations. The automated switches in the core topology model of the automated switches are extended to the whole domain, and the automated switches and key nodes connected to the common substation are divided into the same power supply area. In response to the tripping operation request of the target switch to be disconnected, the target power supply area to which the target switch belongs and the real-time opening and closing status of each automatic switch in the target power supply area are determined from each power supply area. After the target switch is dummy-set to the open state, based on the real-time open and closed states of each automatic switch in the target power supply area, the target switch is used as the starting point for the extension, and the topology extension result is obtained in the target power supply area. Based on the topology extension results, it is determined whether the distribution network has been successfully looped.

2. The method according to claim 1, characterized in that, The step of extending the topology within the target power supply area, using the target switch as the starting point, and obtaining the topology extension result includes: Obtain the first connection point and the second connection point on both sides of the target switch; Using the first connection point as the first extension starting point and the second connection point as the second extension starting point, topology extensions are performed within the target power supply area to determine whether the first connection point and / or the second connection point can be extended to a substation within the target power supply area.

3. The method according to claim 2, characterized in that, The determination of whether the distribution network has successfully closed the loop based on the topology extension results includes: If the connection points on both sides of the target switch can be topologically extended to at least one substation, then the distribution network loop is considered to be successfully closed. If at least one connection point is not topologically extended to at least one substation, it is determined that the distribution network is not closed or there is a power outage.

4. The method according to claim 3, characterized in that, The method further includes: If the distribution network loop is successfully closed, the tripping permission of the target switch is unlocked to perform the tripping operation; If it is determined that the distribution network is not closed or there is a power outage, the tripping authority of the target switch is locked and an alarm prompt is output.

5. The method according to claim 1, characterized in that, The global topology extension of the automated switches in the core topology model of the automated switches includes: The automated switches in the core topology model of the automated switch are virtualized as wires, and the automated switches are extended in the global topology using static connection relationships.

6. The method according to claim 1, characterized in that, The construction of the core topology model for automated switches based on the original full-domain distribution network topology data includes: The original global topology data of the distribution network is cleaned and filtered to remove non-core devices, which include at least one of non-automatic switches, redundant devices and auxiliary nodes. Based on the original global topology data of the distribution network after removing non-core equipment, the core topology model of the automated switch is constructed.

7. The method according to claim 1, characterized in that, After dividing the various automated switches and key nodes of the topologically connected substation into the same power supply area, the method further includes: Based on the automated switches present in each power supply area, the regional affiliation relationship of each automated switch in the core topology model of the automated switches is constructed and stored in categories.

8. The method according to claim 1, characterized in that, The method further includes: The interactive interface displays at least one of the following: the core topology model of the automated switch, the partition topology relationship of each power supply area, and the real-time opening and closing status, loop closure determination result, and alarm prompts of the automated switches in the power supply area.

9. A power distribution network loop closure detection device, characterized in that, include: The model building module is used to build a core topology model of automated switches based on the original full-domain topology data of the distribution network. The core topology model of automated switches includes automated switches, key nodes of the distribution network, and substations. The topology extension module is used to extend the topology of the automated switches in the core topology model of the automated switches across the entire domain, connecting the topology to the various automated switches and key nodes of the common substation and dividing them into the same power supply area. The request response module is used to respond to the tripping operation request of the target switch to be disconnected, determine the target power supply area to which the target switch belongs from each power supply area, and the real-time opening and closing status of each automatic switch in the target power supply area; The result acquisition module is used to set the target switch to a virtual open state, and then, based on the real-time open and closed states of each automatic switch in the target power supply area, use the target switch as the starting point to perform topology extension in the target power supply area and obtain the topology extension result. The loop closure determination module is used to determine whether the distribution network loop closure is successful based on the topology extension results.

10. A power distribution network closed-loop switching and anti-misoperation control system, characterized in that, include: The core topology construction module is used to construct an automated switch core topology model based on the original full-domain distribution network topology data. The automated switch core topology model includes automated switches, key nodes of the distribution network, and substations. The automated switch partitioning module is connected to the core topology construction module. It is used to extend the topology of each automated switch in the whole domain based on the core topology model of the automated switch, divide the automated switches that can be connected to the common substation and the key nodes of the distribution network into the same power supply area, and establish a partitioned topology relationship library. The area status batch acquisition module is connected to the automated switch partitioning module and is used to locate the target power supply area to which the target switch belongs based on the partition topology relationship library, and to collect the real-time on / off status of each automated switch in the target power supply area. The regional topology verification module is connected to the regional status batch acquisition module and the automated switch partitioning module, respectively. It is used to virtually set the target switch to a split-off state, and take the connection points on both sides of the target switch as the starting point to perform a topology extension traversal on the core topology of the automated switch in the target power supply area to determine whether it can be extended to at least one substation. The loop closure determination module is connected to the topology verification module in the area and is used to determine whether the distribution network loop closure is successful based on the topology extension traversal results. The interlocking control module, connected to the loop closure determination module, is used to unlock the tripping permission of the target switch to perform the tripping operation when the distribution network loop closure is successful, or to lock the tripping permission of the target switch when the distribution network loop closure fails or there is a power outage.

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