Visual topology inspection system for power grid

Abstract

The invention relates to a visual topology inspection system for a power grid, and belongs to the technical field of power system automation. The system comprises a topology model construction module, an integrity check module, a position relation check module, a connectivity check module, a regularity check module, an anomaly detection module, an anomaly positioning module, a power failure range judgment module and the like. According to the invention, through implementation of technical means such as establishment of the visual topology model, visual presentation, check and judgment of the topological relation, rapid identification of the fault power failure range based on the topological relation and the like, the management efficiency and the fault processing capability of the network structure are comprehensively improved, and more reliable, efficient and visual service experience is provided for users.

Description

Technical Field

[0001] The invention belongs to the technical field of power system automation, and in particular relates to a visual topology inspection system for a power grid. Background Art

[0002] Yunnan Power Grid faces many challenges in line maintenance and management due to its wide geographical distribution, long lines and high power density. Especially in the event of a tripping accident, due to the complexity of the lines, it is difficult for dispatchers to intuitively determine the power outage area, and it takes a lot of time to carefully check the opening and closing positions of the automation terminals, which can easily lead to misidentification and delay the restoration of power to the power outage area. Most of the existing power grid management systems lack intuitive and efficient topology display methods, making dispatching decisions inefficient. Therefore, how to overcome the shortcomings of existing technologies is an urgent problem to be solved in the field of power system automation technology. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a visual topology inspection system for a power grid to improve the rapid response capability after a power grid accident and accurately determine the power outage area, thereby speeding up the power restoration process.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A visual topology checking system for a power grid, comprising: The topology model building module uses a tree search method to graphically display the structure of the power grid network, thereby forming a visual topology model; The integrity checking module is connected to the topology model building module and is used to check the node definition integrity, edge definition integrity, and consistency of nodes and edges in the visualization topology model; The position relationship checking module is connected to the topology model building module and is used to check whether the relative positions between devices are correct based on the coordinate information and topological relationships of the devices in the visual topology model; The connectivity check module is connected to the topology model building module and is used to check whether the connections between devices in the visual topology model are tight or disconnected; A regularity checking module is connected to the topology model building module and is used to check whether there is an abnormality in the power grid network structure in the visual topology model according to the design rules of the power grid network; The anomaly detection module is connected to the integrity check module, the position relationship check module, the connectivity check module, and the regularity check module, respectively, and is used to obtain the inspection results of the integrity check module, the position relationship check module, the connectivity check module, and the regularity check module, and display whether the inspection result is a topological anomaly; The abnormality location module is connected to the abnormality detection module and is used to start from the first node device in the visual topology model and follow the topological relationship of the devices to search downward in sequence when the abnormality detection module shows that the inspection result is abnormal, and record the abnormal device and the subsequent line information of the device according to the inspection result; The power outage range judgment module is connected to the anomaly detection module and the SCADA system respectively. It is used to obtain the real-time operation data of the power grid from the SCADA system when the anomaly detection module shows that the inspection result is normal. When a node device fails and a power outage occurs, all the lines and nodes connected to it will be regarded as the power outage range.

[0005] Further, preferably, in the topology model construction module, circuit breakers, disconnectors, fuses, transformers, and substations are set as nodes to represent electrical connection points in the power grid, power lines are set to represent physical logical connections between nodes, and a topology relationship tree is set according to the power grid structure; The single-line diagram is parsed to extract the device information and line information; lines are used to represent lines, and graphics of different shapes represent different node devices. Starting from the first device, the search is conducted towards the branch nodes in sequence to establish a topological relationship, which is then stored in the database.

[0006] Furthermore, preferably, in the topology model construction module, when setting the topology relationship tree, if the node substation is a root node, its children include circuit breakers, disconnectors, and fuses; if the node transformer is a leaf node, its children are empty arrays.

[0007] Further, preferably, in the connectivity check module, by analyzing the connection relationship and coordinate information between the devices, it is determined whether the connection meets the design requirements, thereby determining whether there is a disconnection.

[0008] Furthermore, preferably, in the regularity check module, if the transformer is at the end of the power grid, it should be treated as a leaf node, otherwise it is judged that the network structure is abnormal; both ends of the connecting line must be electrical connection points and cannot be empty nodes, otherwise it is judged that the network structure is abnormal.

[0009] Furthermore, preferably, the abnormality detection module is also used to display the specific cause of the abnormality.

[0010] Furthermore, preferably, it also includes an abnormality display module, which is connected to the abnormality locating module. If the abnormality detection module displays that the inspection result is abnormal, and it is because the connectivity inspection module finds that the node is disconnected, then the node and its subsequent line information are marked as abnormal, and these abnormal parts are highlighted in gray.

[0011] Furthermore, preferably, in the power outage range determination module, if there is a power transfer situation in the transformer substation ring network feeder, the power outage range is auxiliary determined according to the state of the device node at the broken ring point.

[0012] Furthermore, preferably, it further includes: a coloring module, connected to the power outage range determination module, for marking the power outage range in the visual topology model as gray.

[0013] The core purpose of the present invention is to provide an efficient, intuitive and accurate visual topology inspection system for power grids to meet the challenges brought by the complex line structure of Yunnan power grid. Specifically, the present invention aims to: Improve fault response speed: By building a visual topological model of the power grid, the fault point can be quickly identified and located, reducing the dispatcher's verification time after the accident, thereby speeding up the power restoration process and reducing the impact of power outages on users.

[0014] Enhance the accuracy of dispatching decisions: Using graphical display methods, dispatchers can intuitively understand the grid structure, accurately determine the scope of power outages, avoid erroneous decisions caused by misidentification of opening and closing positions, and improve the reliability and safety of grid operation.

[0015] Optimize grid management efficiency: Through automated and intelligent technical means, reduce the workload of dispatchers, improve the automation level of grid management, and provide strong support for grid maintenance, optimization and upgrading.

[0016] In summary, the present invention aims to solve the problem of accident handling in the complex line structure of Yunnan power grid through innovative technical means, and improve the overall operation efficiency and user experience of the power grid.

[0017] The present invention realizes comprehensive, intuitive and efficient management of network or system structure by implementing a series of innovative technical means. The specific technical effects are as follows: Establishment of visual topology model: It significantly improves users' understanding of a network or system structure, making complex electrical connections and physical logic clearly understandable.

[0018] Through graphical display, users can quickly locate each device and the relationship between them, improving work efficiency.

[0019] 2. Visual presentation and inspection of topological relationships: The single-line diagram in SVG format was parsed using Python technology to accurately extract equipment information and line information, laying a solid foundation for the subsequent establishment of topological relationships.

[0020] Through integrity check, position relationship check, connectivity check, regularity check and anomaly detection, the correct connection and position relationship of each device in the network are fully ensured, effectively avoiding failures caused by connection errors or omissions.

[0021] The abnormal location function can quickly discover and record abnormal equipment and its subsequent line information, providing strong support for rapid troubleshooting.

[0022] 3. Rapid identification of fault power outage scope based on topological relationships: Fault power outage scope rules have been formulated. Once a node device fails and a power outage occurs, the system can automatically screen out all affected subsequent equipment and lines to form a power outage scope, greatly improving the efficiency and accuracy of fault handling.

[0023] The power outage range marking function uses coloring technology to mark the power outage range in gray, allowing dispatchers to quickly identify and make accurate dispatch decisions, effectively reducing the losses caused by power outages.

[0024] In summary, the present invention comprehensively improves the management efficiency and fault handling capabilities of the network structure by implementing technical means such as establishing a visual topology model, visually presenting and checking and judging topological relationships, and quickly identifying the scope of fault power outages based on topological relationships, providing users with a more reliable, efficient and intuitive service experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a visual topology inspection system for a power grid according to the present invention; Figure 2 It is another structural schematic diagram of the visual topology inspection system for power grids of the present invention; Figure 3 A flowchart of the visual topology inspection system for power grids of the present invention; Figure 4 A visualization topology model display diagram for detecting topological anomalies by the anomaly detection module; Figure 5 Display effect diagram for power outage range; Figure 6 Human-computer interaction diagram colored for the coloring module. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with embodiments.

[0027] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0028] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific technology, connection relationship or condition is specified in the examples, the technology, connection relationship, condition described in the literature in the field or the product specification is used. If the manufacturer of the materials, instruments or equipment used is not specified, they are all conventional products that can be purchased.

[0029] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connections. The term "and / or" used here includes any unit and all combinations of one or more associated listed items.

[0030] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein. Example 1

[0033] like Figure 1 As shown, a visual topology inspection system for a power grid comprises: The topology model building module 101 uses a tree search method to display the structure of the power grid network in a graphical manner, thereby forming a visual topology model; The integrity checking module 102 is connected to the topology model building module 101 and is used to check the node definition integrity, edge definition integrity, and consistency of nodes and edges in the visual topology model; The position relationship checking module 103 is connected to the topology model building module 101 and is used to check whether the relative positions between the devices are correct according to the coordinate information and topological relationships of the devices in the visual topology model; The connectivity check module 104 is connected to the topology model building module 101 and is used to check whether the connection between devices in the visual topology model is tight or disconnected; A regularity checking module 105 is connected to the topology model building module 101 and is used to check whether there is an abnormality in the power grid network structure in the visual topology model according to the design rules of the power grid network; The anomaly detection module 106 is connected to the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, respectively, and is used to obtain the inspection results of the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, and display whether the inspection result is a topological anomaly; The abnormality locating module 107 is connected to the abnormality detecting module 106 and is used to start from the first node device in the visual topology model and follow the topological relationship of the devices to search downward in sequence when the abnormality detecting module 106 shows that the inspection result is abnormal, and record the abnormal device and the subsequent line information of the device according to the inspection result; The power outage range judgment module 108 is connected to the abnormality detection module 106 and the SCADA system respectively, and is used to obtain real-time operation data of the power grid from the SCADA system when the abnormality detection module 106 shows that the inspection result is normal. When a node device fails and a power outage occurs, all the lines and nodes connected to it will be regarded as the power outage range. Example 2

[0034] like Figure 2 As shown, a visual topology inspection system for a power grid comprises: The topology model building module 101 uses a tree search method to display the structure of the power grid network in a graphical manner, thereby forming a visual topology model; The integrity checking module 102 is connected to the topology model building module 101 and is used to check the node definition integrity, edge definition integrity, and consistency of nodes and edges in the visual topology model; The position relationship checking module 103 is connected to the topology model building module 101 and is used to check whether the relative positions between the devices are correct according to the coordinate information and topological relationships of the devices in the visual topology model; The connectivity check module 104 is connected to the topology model building module 101 and is used to check whether the connection between devices in the visual topology model is tight or disconnected; A regularity checking module 105 is connected to the topology model building module 101 and is used to check whether there is an abnormality in the power grid network structure in the visual topology model according to the design rules of the power grid network; The anomaly detection module 106 is connected to the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, respectively, and is used to obtain the inspection results of the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, and display whether the inspection result is a topological anomaly; The abnormality locating module 107 is connected to the abnormality detecting module 106 and is used to start from the first node device in the visual topology model and follow the topological relationship of the devices to search downward in sequence when the abnormality detecting module 106 shows that the inspection result is abnormal, and record the abnormal device and the subsequent line information of the device according to the inspection result; The power outage range judgment module 108 is connected to the abnormality detection module 106 and the SCADA system respectively, and is used to obtain real-time operation data of the power grid from the SCADA system when the abnormality detection module 106 shows that the inspection result is normal. When a node device fails and a power outage occurs, all the lines and nodes connected to it will be regarded as the power outage range.

[0035] In the topology model building module 101, circuit breakers, disconnectors, fuses, transformers, and substations are set as nodes to represent electrical connection points in the power grid, power lines are set to represent physical logical connections between nodes, and a topology relationship tree is set according to the power grid structure; The single-line diagram is parsed to extract the device information and line information; lines are used to represent lines, and graphics of different shapes represent different node devices. Starting from the first device, the search is conducted towards the branch nodes in sequence to establish a topological relationship, which is then stored in the database.

[0036] In the topology model building module 101, when setting the topology relationship tree, if the node substation is a root node, its children include circuit breakers, disconnectors, and fuses; if the node transformer is a leaf node, its children are empty arrays.

[0037] In the connectivity check module 104, by analyzing the connection relationship and coordinate information between the devices, it is determined whether the connection meets the design requirements, thereby determining whether there is a disconnection.

[0038] In the regularity checking module 105, if the transformer is the end of the power grid, it should be regarded as a leaf node, otherwise it is judged that the network structure is abnormal; the two ends of the connecting line must be electrical connection points and cannot be empty nodes, otherwise it is judged that the network structure is abnormal.

[0039] The abnormality detection module 106 is also used to display the specific cause of the abnormality.

[0040] It also includes an abnormality display module 110, which is connected to the abnormality positioning module 107. If the abnormality detection module 106 displays that the inspection result is abnormal, and it is because the connectivity inspection module 104 finds that the node is disconnected, the node and its subsequent line information are marked as abnormal, and these abnormal parts are highlighted in gray.

[0041] In the power outage range determination module 108, if there is a power transfer situation in the transformer substation ring network feeder, the power outage range is determined according to the state of the device node at the broken ring point.

[0042] The system also includes a coloring module 109, which is connected to the power outage range determination module 108 and is used to mark the power outage range in the visual topology model as gray.

[0043] The specific construction method of the system of the present invention is as follows: 1. Establish a visual topology model 1.1 Establishing topological node rules The tree search method is used to display the network structure in a graphical way, so that users can intuitively understand the relationship and connection between each device. Specifically, circuit breakers, disconnectors, fuses, transformers, and substations are set as nodes to represent electrical connection points in the power grid, power lines are set to represent the physical logical connection between nodes, and a topological relationship tree is set according to the power grid structure: if the node substation is the root node, its children include circuit breakers, disconnectors, and fuses; if the node transformer is a leaf node, its children are empty arrays.

[0044] 1.2 Visualization of topological relationships The single-line diagram in SVG format is parsed through Python technology to extract device information and line information, including the location relationship of the equipment, the starting point and end point of the line coordinates; lines are used to represent lines, and graphics of different shapes represent different node devices. Starting from the first device, the search is conducted towards the branch nodes in sequence to establish a topological relationship, which is then stored in the database.

[0045] The present invention adopts a visual topology model to display the structure of the network in a graphical manner, so that users can intuitively understand the relationship and connection between various devices.

[0046] 2. Topological relationship inspection and judgment 2.1 Checking rules (1) Integrity check: Node definition integrity: Ensure that all circuit breakers, disconnectors, fuses, transformers, and substation nodes are correctly defined and each node has a unique identifier; Edge definition completeness: Ensure that all power lines are correctly defined and that each edge connects two existing nodes; Node and edge consistency: Ensure that all edges reference existing nodes.

[0047] (2) Position relationship check: Check whether the relative positions between devices are correct based on the coordinate information and topological relationships of the devices in the visual topology model; Select two devices and calculate the straight-line distance between the coordinate points of the two devices. The straight-line distance d between two points A (x1, y1) and B (x2, y2) can be calculated using the formula d=√[(x2-x1)²+(y2-y1)²]. Square the horizontal and vertical distances between the two points, add them together, and then take the square root to get the straight-line distance between the two points.

[0048] Check whether the node device and the line it is connected to are on the same plane and whether the connection point is located accurately. Draw a perpendicular line through the node device coordinates, and the resulting perpendicular line segment is the distance between the node device and the line it is connected to. The equation of the line is: ax+by+c=0, the point coordinates are: (x,y), and the distance formula is |ax+by+c| / √(a²+b²).

[0049] (3) Connectivity check: Check whether the devices in the visualized topology model are tightly connected or disconnected; Specifically, by analyzing the connection relationship and coordinate information between devices, it is determined whether the connection meets the design requirements, thereby determining whether there is a disconnection. For example, the coordinate points of node device 1 are (2,1) and (3,1), with an accuracy of 1, then the coordinate starting point of the line connected to this should be (4,1). If the detected coordinate starting point is (5,1) or is not equal to (4,1), then the node is determined to be "disconnected".

[0050] (4) Regularity check: According to the design rules of the network, check whether the connection between each device meets the requirements of the rules. For example, the transformer is the end of the power grid and should be regarded as a "leaf node", otherwise it is judged that the network structure is abnormal. The two ends of the connection line must be electrical connection points and cannot be empty nodes, otherwise it is judged that the network structure is abnormal.

[0051] (5) Anomaly detection: During the integrity check, position relationship check, connectivity check, and regularity check, if any connection or device that does not meet the requirements of (1) to (4) above is found, it will be considered an abnormality. The abnormality may include connection errors, position offsets, missing devices, etc.

[0052] 2.2 Abnormal Location In the visual topology model, starting from the first node device, follow the topological relationship of the devices and search downwards in sequence. Based on the inspection results, record the abnormal device and the subsequent line information of the device. 2.3 Abnormal display If the anomaly detection shows that the inspection result is abnormal, and it is because the connectivity check finds that the node is disconnected, that is, the physical link with the previous node fails, then the node and its subsequent line information are marked as abnormal, and these abnormal parts are highlighted in gray for quick identification.

[0053] 3. Rapidly identify the scope of power outage based on topological relationships 3.1 Determination of power outage scope Formulate fault power outage scope rules based on the equipment topology: It is necessary to obtain real-time operation data of the power grid from the SCADA system (supervisory control and data acquisition system). When a node device fails and the power goes out, all the lines and nodes connected to it will be considered as the power outage scope. If the substation ring network feeder has a power transfer situation, the power outage scope is determined based on the state of the device node at the broken ring point. In the software, users can customize the input of faulty equipment information, and then the system will automatically filter and locate the faulty node, and accurately list all the affected subsequent equipment and lines based on the topological connection relationship of the node to form the power outage scope.

[0054] 3.2 Power outage range marking Based on the determined power outage scope, coloring technology is used in the visual topology model to mark the scope in gray so that dispatchers can quickly identify it and make accurate dispatching decisions.

[0055] Application Examples

[0056] like Figure 2 As shown, a visual topology inspection system for a power grid comprises: The topology model building module 101 uses a tree search method to display the structure of the power grid network in a graphical manner, thereby forming a visual topology model; The integrity checking module 102 is connected to the topology model building module 101 and is used to check the node definition integrity, edge definition integrity, and consistency of nodes and edges in the visual topology model; The position relationship checking module 103 is connected to the topology model building module 101 and is used to check whether the relative positions between the devices are correct according to the coordinate information and topological relationships of the devices in the visual topology model; The connectivity check module 104 is connected to the topology model building module 101 and is used to check whether the connection between devices in the visual topology model is tight or disconnected; A regularity checking module 105 is connected to the topology model building module 101 and is used to check whether there is an abnormality in the power grid network structure in the visual topology model according to the design rules of the power grid network; The anomaly detection module 106 is connected to the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, respectively, and is used to obtain the inspection results of the integrity check module 102, the position relationship check module 103, the connectivity check module 104, and the regularity check module 105, and display whether the inspection result is a topological anomaly; The abnormality locating module 107 is connected to the abnormality detecting module 106 and is used to start from the first node device in the visual topology model and follow the topological relationship of the devices to search downward in sequence when the abnormality detecting module 106 shows that the inspection result is abnormal, and record the abnormal device and the subsequent line information of the device according to the inspection result; The power outage range judgment module 108 is connected to the abnormality detection module 106 and the SCADA system respectively, and is used to obtain real-time operation data of the power grid from the SCADA system when the abnormality detection module 106 shows that the inspection result is normal. When a node device fails and a power outage occurs, all the lines and nodes connected to it will be regarded as the power outage range.

[0057] In the topology model building module 101, circuit breakers, disconnectors, fuses, transformers, and substations are set as nodes to represent electrical connection points in the power grid, power lines are set to represent physical logical connections between nodes, and a topology relationship tree is set according to the power grid structure; The single-line diagram is parsed to extract the device information and line information; lines are used to represent lines, and graphics of different shapes represent different node devices. Starting from the first device, the search is conducted towards the branch nodes in sequence to establish a topological relationship, which is then stored in the database.

[0058] In the topology model building module 101, when setting the topology relationship tree, if the node substation is a root node, its children include circuit breakers, disconnectors, and fuses; if the node transformer is a leaf node, its children are empty arrays.

[0059] In the connectivity check module 104, by analyzing the connection relationship and coordinate information between the devices, it is determined whether the connection meets the design requirements, thereby determining whether there is a disconnection.

[0060] In the regularity checking module 105, if the transformer is the end of the power grid, it should be regarded as a leaf node, otherwise it is judged that the network structure is abnormal; the two ends of the connecting line must be electrical connection points and cannot be empty nodes, otherwise it is judged that the network structure is abnormal.

[0061] The abnormality detection module 106 is also used to display the specific cause of the abnormality.

[0062] It also includes an abnormality display module 110, which is connected to the abnormality positioning module 107. If the abnormality detection module 106 displays that the inspection result is abnormal, and it is because the connectivity inspection module 104 finds that the node is disconnected, the node and its subsequent line information are marked as abnormal, and these abnormal parts are highlighted in gray.

[0063] In the power outage range determination module 108, if there is a power transfer situation in the transformer substation ring network feeder, the power outage range is determined according to the state of the device node at the broken ring point.

[0064] The system also includes a coloring module 109, which is connected to the power outage range determination module 108 and is used to mark the power outage range in the visual topology model as gray.

[0065] The flowchart of the visual topology inspection system for power grid of the present invention is as follows: Figure 3 As shown;

[0066] The visual topology model result of the anomaly detection module 106 detecting topological anomalies is as follows: Figure 4 As shown; The power outage range determination module 108 displays the power outage range as follows: Figure 5 As shown; The human-computer interaction of the coloring module 109 is as follows Figure 6 shown.

[0067] By implementing the technical solution proposed in the present invention, comprehensive, intuitive and efficient management of the network structure can be achieved. The establishment of a visual topology model allows users to intuitively understand the relationship and connection between various devices; the topology relationship inspection and judgment function can ensure the correct connection and position relationship of various devices in the network; the fault power outage scope rapid identification function based on the topology relationship greatly improves the efficiency and accuracy of fault handling. Therefore, the present invention has broad application prospects and market value.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A visual topology inspection system for a power grid, characterized in that: include: A topology model building module (101) uses a tree search method to display the structure of the power grid network in a graphical manner, thereby forming a visual topology model; An integrity checking module (102), connected to the topology model building module (101), is used to check the node definition integrity, edge definition integrity, and consistency of nodes and edges in the visual topology model; A position relationship checking module (103), connected to the topology model building module (101), is used to check whether the relative positions between devices are correct based on the coordinate information and topological relationships of the devices in the visual topology model; A connectivity check module (104), connected to the topology model building module (101), is used to check whether the connection between devices in the visual topology model is tight or disconnected; A regularity checking module (105), connected to the topology model building module (101), is used to check whether there is any abnormality in the power grid network structure in the visual topology model according to the design rules of the power grid network; The anomaly detection module (106) is connected to the integrity check module (102), the position relationship check module (103), the connectivity check module (104), and the regularity check module (105) respectively, and is used to obtain the inspection results of the integrity check module (102), the position relationship check module (103), the connectivity check module (104), and the regularity check module (105), and display whether the inspection result is a topological anomaly; The abnormality locating module (107) is connected to the abnormality detecting module (106) and is used to start from the first node device in the visual topology model and follow the topological relationship of the devices to search downward in sequence when the abnormality detecting module (106) displays the inspection result as abnormal, and record the abnormal device and the subsequent line information of the device according to the inspection result; The power outage range judgment module (108) is connected to the abnormality detection module (106) and the SCADA system respectively, and is used to obtain real-time operation data of the power grid from the SCADA system when the abnormality detection module (106) shows that the inspection result is normal. When a node device fails and a power outage occurs, all the lines and nodes connected to it will be regarded as the power outage range.

2. The visual topology inspection system for a power grid according to claim 1, characterized in that: In the topology model building module (101), circuit breakers, disconnectors, fuses, transformers, and substations are set as nodes to represent electrical connection points in the power grid, power lines are set to represent physical logical connections between nodes, and a topology relationship tree is set according to the power grid structure; Analyze the single-line diagram to extract the equipment information and line information; Lines are used to represent routes, and graphics of different shapes represent different node devices. Starting from the first device, the search moves toward the branch nodes in sequence, a topological relationship is established, and then stored in the database.

3. The visual topology inspection system for a power grid according to claim 2, characterized in that: In the topology model building module (101), when setting the topology relationship tree, if the node substation is a root node, its children include circuit breakers, disconnectors, and fuses; if the node transformer is a leaf node, its children are empty arrays.

4. The visual topology inspection system for a power grid according to claim 1, characterized in that: In the connectivity check module (104), the connection relationship and coordinate information between the devices are analyzed to determine whether the connection meets the design requirements, thereby determining whether there is a disconnection.

5. The visual topology inspection system for a power grid according to claim 1, characterized in that: In the regularity check module (105), if the transformer is the end of the power grid, it should be regarded as a leaf node, otherwise it is judged that the network structure is abnormal; the two ends of the connecting line must be electrical connection points and cannot be empty nodes, otherwise it is judged that the network structure is abnormal.

6. The visual topology inspection system for a power grid according to claim 1, characterized in that: The abnormality detection module (106) is also used to display the specific cause of the abnormality.

7. The visual topology inspection system for a power grid according to claim 1, characterized in that: It also includes an abnormality display module (110) connected to the abnormality positioning module (107). If the abnormality detection module (106) displays that the inspection result is abnormal, and it is because the connectivity inspection module (104) finds that the node is disconnected, the node and its subsequent line information are marked as abnormal, and the abnormal parts are highlighted in gray.

8. The visual topology inspection system for a power grid according to claim 1, characterized in that: In the power outage range determination module (108), if the substation ring network feeder has a power transfer situation, the power outage range is determined based on the state of the device node at the ring break point.

9. The visual topology inspection system for a power grid according to claim 1, characterized in that: Also includes: The coloring module (109) is connected to the power outage range determination module (108) and is used to mark the power outage range in the visual topology model as gray.

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