Method, device, storage medium and program product for generating thematic diagram of power flow calculation

Abstract

The embodiment of the present invention discloses a method, device, storage medium and program product for generating a flow calculation thematic map. The method includes: obtaining power grid equipment resource data and power grid equipment asset data; constructing a power grid topology map according to the power grid equipment resource data, and simplifying the power grid topology map based on the preset reserved node type to generate a simplified power grid topology map; superimposing the power grid equipment asset data into the simplified power grid topology map to generate a parameter superposition topology map; dividing the parameter superposition topology map into multiple segmented paths, and merging each intermediate node between the two end nodes of each segmented path to determine the cable segment set node corresponding to the segmented path; combining the end nodes corresponding to each segmented path and the cable segment set node to generate a flow calculation thematic map; wherein the power grid topology map and the simplified power grid topology map are homeomorphic topologies. The generated flow calculation thematic map is more concise, intuitive and easy to calculate without losing the attribute data related to the calculation.

Description

Technical Field

[0001] The present invention relates to the field of electric power information technology, and in particular to a method, device, storage medium and program product for generating a thematic diagram for power flow calculation. Background Art

[0002] With the rapid development of the national economy, the electricity demand of users is growing, and the requirements for the power supply capacity, quality and reliability of power companies are getting higher and higher. Only through their own continuous development can power companies meet the growing demand for electricity. The growth of the scale and complexity of the power grid is the inevitable result of the development of power companies themselves, and accordingly, higher requirements are put forward for the electrical calculation and analysis of the power grid.

[0003] A power grid thematic map is a diagram that describes the relationship between various electrical equipment, lines, and switches in a power system. It is one of the important tools for power system operation and maintenance. However, existing power grid thematic maps are often constructed based on power grid resource data only, which makes it difficult to accurately reflect the electrical characteristics and topological structure of the power grid. There are limitations in electrical analysis and processing such as electrical parameter merging and path optimization, which makes it difficult to meet the needs of scientific management of distribution networks. Summary of the invention

[0004] The present invention provides a method, device, storage medium and program product for generating a thematic map for power flow calculation, which adopts richer information to construct a thematic map for power flow calculation of a distribution network, and adopts a merging and abstracting method when generating the thematic map for power flow calculation, so that the generated thematic map has the characteristics of being concise, intuitive and easy to calculate, thereby meeting the demand for electrical characteristic calculation in the process of scientific management of the distribution network.

[0005] In a first aspect, an embodiment of the present invention provides a method for generating a thematic map for power flow calculation, comprising:

[0006] Obtaining power grid equipment resource data and power grid equipment asset data;

[0007] Constructing a power grid topology map according to power grid equipment resource data, and simplifying the power grid topology map based on preset reserved node types to generate a simplified power grid topology map;

[0008] Overlay the power grid equipment asset data onto the simplified power grid topology map to generate a parameter overlay topology map;

[0009] Divide the parameter superposition topology map into multiple segment paths, and merge each intermediate node between two end nodes of each segment path to determine the cable segment set node corresponding to the segment path;

[0010] Combine the end nodes corresponding to each segment path and the cable segment set nodes to generate a power flow calculation thematic map;

[0011] Among them, the power grid topology diagram and the simplified power grid topology diagram are homeomorphic topologies.

[0012] In a second aspect, an embodiment of the present invention further provides a power flow calculation thematic map generation device, the power flow calculation thematic map generation device comprising:

[0013] at least one processor; and a memory communicatively coupled to the at least one processor;

[0014] The memory stores a computer program executable by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can implement the method for generating thematic diagrams for power flow calculation according to any embodiment of the present invention.

[0015] In a third aspect, an embodiment of the present invention further provides a storage medium comprising computer executable instructions, which, when executed by a computer processor, is used to execute the method for generating a thematic diagram for power flow calculation according to any embodiment of the present invention.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer program product, including a computer program, and when the computer program is executed by a processor, it is used to execute the method for generating a thematic diagram for power flow calculation according to any embodiment of the present invention.

[0017] The embodiment of the present invention provides a method, device, storage medium and program product for generating a flow calculation thematic map, which obtains power grid equipment resource data and power grid equipment asset data; constructs a power grid topology map according to the power grid equipment resource data, and simplifies the power grid topology map based on preset retained node types to generate a simplified power grid topology map; superimposes the power grid equipment asset data onto the simplified power grid topology map to generate a parameter superposition topology map; divides the parameter superposition topology map into multiple segmented paths, and merges each intermediate node between two end nodes of each segmented path to determine a cable segment set node corresponding to the segmented path; combines the end nodes corresponding to each segmented path and the cable segment set nodes to generate a flow calculation thematic map; wherein the power grid topology map and the simplified power grid topology map are homeomorphic topologies. By adopting the above technical solution, when constructing a thematic map for power flow calculation of the distribution network, the nodes in the power grid topology map constructed based on the power grid equipment resource data that are not closely related to the power flow calculation management are first simplified and screened out, and a simplified power grid topology map that is homeomorphic to the original power grid topology map is obtained, and then the power grid equipment asset data is superimposed on the simplified power grid topology map, so that the generated parameter superposition topology map contains both the equipment information required to construct the traditional power grid thematic map and the asset data information associated with the electrical calculation, so that the thematic map generated based on the parameter superposition topology map can be more suitable for the power flow calculation needs of the distribution network. At the same time, when generating the power flow calculation thematic map, the nodes in the parameter superposition topology map that are not related to the power grid path division are merged with the asset data parameters retained, so that the generated power flow calculation thematic map is more concise and intuitive without losing the attribute data related to the calculation, and has the characteristics of easy calculation, so as to meet the needs of electrical characteristic calculation in the scientific management of the distribution network.

[0018] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 A flowchart of a method for generating a thematic map of power flow calculation provided in the first embodiment of the present invention;

[0021] Figure 2 A flow chart of a method for generating a thematic map of power flow calculation provided in the second embodiment of the present invention;

[0022] Figure 3 An example diagram of a segmented path in a parameter overlay topology diagram provided in the second embodiment of the present invention;

[0023] Figure 4 A structural example diagram of a power flow calculation thematic diagram provided in the second embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of a device for generating a thematic map for power flow calculation provided by the third embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the structure of a power flow calculation thematic map generating device provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment 1

[0029] Figure 1A flowchart of a method for generating a thematic map of power flow calculation provided in the first embodiment of the present invention. The embodiment of the present invention can be applied to the case where a thematic map for electrical analysis is constructed based on the characteristics of a distribution network. The method can be executed by a thematic map generating device for power flow calculation. The thematic map generating device for power flow calculation can be implemented by software and / or hardware. The thematic map generating device for power flow calculation can be configured in a power flow calculation thematic map generating device. Optionally, the thematic map generating device for power flow calculation can be an electronic device, which can be a notebook, a desktop computer, a smart tablet, etc., and the embodiment of the present invention does not limit this.

[0030] like Figure 1 As shown, a method for generating a thematic map of power flow calculation provided by an embodiment of the present invention specifically includes the following steps:

[0031] S101. Obtain power grid equipment resource data and power grid equipment asset data.

[0032] In this embodiment, the grid equipment resource data can be specifically understood as information used to describe the resource attributes of the grid equipment in the distribution network. The grid equipment asset data can be specifically understood as information used to describe the asset attributes of the grid equipment in the distribution network. For example, taking the conductor as an example, the asset data of the conductor may include parameters such as the conductor type, conductor cross-section, number of strands and specifications; the resource data of the conductor may include information such as the equipment owner information, voltage level, upper line, commissioning status, starting and ending towers and conductor length, which means that the grid equipment asset data is the attribute information that the grid equipment is born with when it leaves the factory, and the grid equipment resource data is the attribute information generated after the grid equipment is installed in the distribution network.

[0033] Specifically, when the distribution network is laid out and a thematic map needs to be constructed for distribution network flow calculation, the power grid equipment required for the construction of the thematic map can be determined based on the scope covered by the thematic map in the distribution network, and then the power grid equipment resource data and power grid equipment asset data on the resource attributes and asset attributes of each power grid equipment can be obtained.

[0034] S102: construct a power grid topology map according to the power grid equipment resource data, and simplify the power grid topology map based on preset reserved node types to generate a simplified power grid topology map.

[0035] Among them, the power grid topology diagram and the simplified power grid topology diagram are homeomorphic topologies.

[0036] In this embodiment, the power grid topology diagram can be specifically understood as a graphical representation for displaying the various nodes in the distribution network and the connection relationship between them, wherein the various power grid devices in the distribution network are abstracted as nodes in the power grid topology diagram, and the power lines connecting these nodes are abstracted as lines, so as to achieve a simplified presentation of the physical layout structure of the power grid. The preset reserved node type can be specifically understood as the device type of the power grid device that is pre-set according to the actual situation and is expected to be retained when simplifying the power grid topology diagram. The simplified power grid topology diagram can be specifically understood as a topology diagram obtained by deleting and simplifying the nodes in the power grid topology diagram that are not closely related to the flow calculation. The homeomorphic topology can be specifically understood as a topology in topology that can transform two topological manifolds through operations such as bending, stretching, and shearing (as long as they are finally completely pasted together along the gaps that were originally cut).

[0037] Specifically, a power grid topology map is constructed based on the attribute information such as the connection relationship generated by each power grid device during the deployment process contained in the power grid equipment resource data. Since the power grid equipment corresponding to some nodes in the power grid topology map is not closely related to the power flow calculation required for the distribution network, the device type of the above-mentioned power grid equipment can be determined as a node type that does not need to be retained in the power grid topology map, and then the node type other than the above-mentioned node in the power grid topology map can be determined as a preset reserved node type. Based on the preset reserved node type and the power grid equipment type of each node corresponding to the power grid equipment in the power grid topology map, each node in the power grid topology map is screened, and only nodes whose power grid equipment type belongs to the preset reserved node type are retained, so as to simplify the power grid topology map, and the simplified topology map is determined as a simplified power grid topology map.

[0038] It is understandable that when deleting a node that is not a preset reserved node type, the connection corresponding to the node needs to be deleted at the same time to simplify the power grid topology. At the same time, in order to ensure the identity and availability of the simplified power grid topology and the power grid topology, when simplifying the power grid topology, the conditions of homeomorphic deletion should be met so that the final power grid topology and the simplified power grid topology belong to the homeomorphic topology.

[0039] S103, superimposing the power grid equipment asset data onto the simplified power grid topology map to generate a parameter superposition topology map.

[0040] Specifically, based on the type of power grid equipment corresponding to each node in the simplified power grid topology diagram, the nodes that need to have asset attribute data superimposed are determined, and then the power grid equipment asset data corresponding to each node is screened from the power grid equipment asset data, and the power grid equipment asset data is associated with the corresponding power grid equipment node and saved. After the associated storage of the power grid equipment asset data is completed for all nodes that need to be superimposed, the resulting topology diagram is determined as a parametric superposition topology diagram.

[0041] S104: Divide the parameter superposition topology map into multiple segment paths, and merge each intermediate node between two end nodes of each segment path to determine a cable segment set node corresponding to the segment path.

[0042] In this embodiment, the segmented path can be specifically understood as a topological structure in the parameter superposition topology diagram, with the nodes corresponding to the power grid equipment that can be used for line division in the distribution network as the starting and ending points. The end node can be specifically understood as the node corresponding to the starting point and the end point of the segmented path in the parameter superposition topology diagram. The intermediate node can be specifically understood as the node corresponding to the segmented path in the parameter superposition topology diagram except the starting point and the end point. The cable segment collection node can be specifically understood as the node obtained by merging all the intermediate nodes in the segmented path and superimposing and merging the attribute data corresponding to each intermediate node.

[0043] Specifically, according to the type of power grid equipment corresponding to each node in the parameter superposition topology map, the nodes that can be used to divide the line of the distribution network are determined, and then the path of the parameter superposition topology map is divided with the adjacent nodes that can be used to divide the line of the distribution network as the end nodes, so as to obtain multiple segmented paths. Then, for each segmented path, the nodes except the end nodes in the corresponding nodes obtained in the parameter superposition topology map are determined as intermediate nodes, and the intermediate nodes are merged into one node, and the various types of attribute information associated with the intermediate nodes are superimposed according to the different attribute types, so as to obtain the superimposed attribute parameters corresponding to each attribute type, and then the superimposed attribute parameters can be used as the attribute parameters of the cable segment set node obtained by merging the intermediate nodes, so that the cable segment set node can realize the simplification of the intermediate nodes in the segmented path without losing the attribute parameters.

[0044] S105: Combine the end nodes corresponding to each segment path and the cable segment set nodes to generate a power flow calculation thematic map.

[0045] Specifically, according to the relative position relationship of the end nodes corresponding to each segmented path in the parameter overlay topology diagram, the connection relationship between the end nodes is reconstructed, and then each cable segment set node is added between the two end nodes corresponding to the corresponding segmented path, and all nodes are combined to obtain a flow calculation thematic map containing asset attribute information, which can be used for flow calculation of the distribution network.

[0046] The technical solution of this embodiment is to obtain power grid equipment resource data and power grid equipment asset data; construct a power grid topology map according to the power grid equipment resource data, and simplify the power grid topology map based on preset retained node types to generate a simplified power grid topology map; superimpose the power grid equipment asset data on the simplified power grid topology map to generate a parameter superposition topology map; divide the parameter superposition topology map into multiple segmented paths, and merge each intermediate node between the two end nodes of each segmented path to determine the cable segment set node corresponding to the segmented path; combine the end nodes corresponding to each segmented path and the cable segment set nodes to generate a flow calculation thematic map; wherein the power grid topology map and the simplified power grid topology map are homeomorphic topologies. By adopting the above technical solution, when constructing a thematic map for power flow calculation of the distribution network, the nodes in the power grid topology map constructed based on the power grid equipment resource data that are not closely related to the power flow calculation management are first simplified and screened out, and a simplified power grid topology map that is homeomorphic to the original power grid topology map is obtained, and then the power grid equipment asset data is superimposed on the simplified power grid topology map, so that the generated parameter superposition topology map contains both the equipment information required to construct the traditional power grid thematic map and the asset data information associated with the electrical calculation, so that the thematic map generated based on the parameter superposition topology map can be more suitable for the power flow calculation needs of the distribution network. At the same time, when generating the power flow calculation thematic map, the nodes in the parameter superposition topology map that are not related to the power grid path division are merged with the asset data parameters retained, so that the generated power flow calculation thematic map is more concise and intuitive without losing the attribute data related to the calculation, and has the characteristics of easy calculation, so as to meet the needs of electrical characteristic calculation in the scientific management of the distribution network.

[0047] Embodiment 2

[0048] Figure 2A flowchart of a method for generating a thematic map for power flow calculation is provided in the second embodiment of the present invention. The embodiment of the present invention is further optimized on the basis of the above-mentioned optional technical solutions. The construction of the power grid topology map is first completed based on the power grid equipment resource data, and then the nodes in the power grid topology map related to the construction and on-off of the distribution network path are screened based on the homeomorphic topological transformation method, so that the generated simplified power grid topology map does not contain nodes that are not related to power flow calculation, thereby realizing the simplification of the topology map. Further, based on the distribution transformer equipment attribute data set and the cable equipment attribute data set contained in the power grid equipment asset data, electrical parameter attributes are added to the nodes of the distribution transformer equipment type and the cable equipment type in the simplified power grid topology map, so that the generated parameter overlay topology map contains both the equipment information required to construct the traditional power grid thematic map and the asset data information associated with electrical calculation. Further based on the node type of each node in the parameter overlay topology map, the parameter overlay topology map is divided into multiple segmented paths according to the power grid topology nodes that are not cable equipment types, and then multiple intermediate nodes belonging to the cable equipment type in each segmented path are merged into a cable segment collection node, and the electrical parameter attributes of all intermediate nodes are retained in the cable segment collection node, so that the generated power flow calculation thematic map is more concise and intuitive without losing the calculation-related attribute data, and has the characteristics of easy calculation, so as to meet the needs of electrical characteristic calculation in the scientific management of the distribution network.

[0049] like Figure 2 As shown, a method for generating a thematic map of power flow calculation provided by an embodiment of the present invention specifically includes the following steps:

[0050] S201. Acquire power grid equipment resource data and power grid equipment asset data.

[0051] Among them, the power grid equipment asset data includes a distribution transformer equipment attribute data set and a cable equipment attribute data set.

[0052] Among them, the electrical parameter attributes of the distribution transformer include at least rated capacity, short-circuit impedance, short-circuit loss, no-load current and no-load loss; the electrical parameter attributes of the cable include at least length, resistance, reactance and capacitance.

[0053] In this embodiment, the distribution transformer equipment attribute data set can be specifically understood as the asset attribute data set corresponding to the power grid equipment whose power grid equipment type is distribution transformer in the distribution network. The cable equipment attribute data set can be specifically understood as the asset attribute data set corresponding to the power grid equipment whose power grid equipment type is wire cable in the distribution network.

[0054] S202: Determine the power grid topology nodes and the physical connection relationship between the power grid topology nodes according to the power grid equipment resource data.

[0055] Specifically, the grid equipment in the distribution network and the physical connection relationship between the grid equipment are determined based on the grid equipment resource data, each grid equipment is regarded as a grid topology node in the grid topology map, and the connection relationship between different grid equipment is determined as the physical connection relationship between the grid topology nodes.

[0056] S203: construct a power grid topology map according to each power grid topology node and each physical connection relationship.

[0057] Specifically, different power grid topology nodes are connected according to the physical connection relationship between each other, and the corresponding power grid equipment resource data information is saved in each power grid topology node, and the formed graphic relationship is determined as a power grid topology map.

[0058] S204: Performing a homeomorphic topological transformation on the power grid topology map according to the preset reserved node types and the node types of each power grid topology node in the power grid topology map to generate a simplified power grid topology map.

[0059] Among them, the preset reserved node type is the node type related to the path and on-off in the distribution network.

[0060] Specifically, since each grid topology node in the grid topology diagram has its corresponding node type, the node type is consistent with the device type of the grid device corresponding to the grid topology node. Since only the grid devices related to the path and on-off in the distribution network need to be considered when calculating the flow for the distribution network, the node type corresponding to the grid device type related to the path and on-off in the distribution network can be determined as the preset reserved node type, and then the grid topology diagram is subjected to homeomorphic topological transformation according to the preset reserved point type, and the grid topology nodes that do not belong to the preset reserved node type are subjected to second-degree node contraction and terminal subtree removal according to the homeomorphic topological transformation principle, and the generated topology diagram is determined as a simplified grid topology diagram.

[0061] Exemplarily, the preset reserved node types may include power station types, circuit breaker types, distribution transformer equipment types, cable equipment types, and branch point equipment types, etc., which are not limited in this embodiment of the present invention.

[0062] S205 , extracting distribution transformer device nodes and cable device nodes whose node types are distribution transformer device type and cable device type from the simplified power grid topology diagram.

[0063] Specifically, according to the node type of each node in the simplified power grid topology diagram, nodes with a distribution transformer type are extracted as distribution transformer nodes, and nodes with a cable device type are extracted as cable device nodes.

[0064] S206. Superimpose distribution transformer electrical parameter attributes for each distribution transformer device node according to the distribution transformer device attribute data set.

[0065] Specifically, different distribution transformer equipment nodes correspond to different distribution transformer equipment attribute data in the distribution transformer equipment attribute data set, so the corresponding distribution transformer equipment attribute data can be associated in different distribution transformer equipment nodes to achieve the superposition of distribution transformer electrical parameter attributes of each distribution transformer equipment node.

[0066] S207. Superimpose cable electrical parameter attributes for each cable equipment node according to the cable equipment attribute data set.

[0067] Specifically, different cable equipment nodes correspond to different cable equipment attribute data in the cable equipment attribute data set, so the corresponding cable equipment attribute data can be associated in different cable equipment nodes to achieve the superposition of cable electrical parameter attributes of each cable equipment node.

[0068] It is understandable that S206 and S207 may be executed simultaneously or in any order. The embodiment of the present invention only takes the order execution as an example.

[0069] S208. The simplified power grid topology diagram is updated by superimposing the distribution transformer device nodes with the distribution transformer electrical parameter attributes and the cable device nodes with the cable electrical parameter attributes to generate a parameter superimposed topology diagram.

[0070] Specifically, the distribution transformer device nodes after superimposing the distribution transformer electrical parameter attributes and the cable device nodes after superimposing the cable electrical parameter attributes are replaced with the corresponding distribution transformer device nodes and cable device nodes in the simplified power grid topology diagram, and the topology diagram obtained after the replacement is determined as the parameter superposition topology diagram.

[0071] S209: Determine a power grid topology node whose node type is not a cable device type in the parameter superposition topology diagram as a target node.

[0072] Specifically, since the power grid topology nodes of power station type, circuit breaker type, distribution transformer type and branch point equipment type in the parameter superposition topology diagram can all be used as the starting and ending points of a path in the distribution network, that is, the nodes in a path should only be power grid topology nodes of cable equipment type. Therefore, nodes can be extracted from the parameter superposition topology diagram according to the node type, and the power grid topology nodes that are not cable equipment types can be extracted and determined as target nodes that can be used as the starting and ending points of a path.

[0073] S210: Determine the path between two adjacent target nodes in the parameter overlay topology map as a segmented path of the parameter overlay topology map.

[0074] For example, Figure 3 An example diagram of a segmented path in a parameter superposition topology diagram provided in the second embodiment of the present invention, such as Figure 3As shown, the parameter superposition topology diagram takes a power station node, three circuit breaker nodes, a branch point device node, a distribution transformer device node and multiple cable device nodes as examples, where the power station node, the circuit breaker node, the branch point device node and the distribution transformer device node can all be used as target nodes in the parameter superposition topology diagram. There are often one or more cable device nodes between the target nodes connected to each other. According to the implementation method of the above-mentioned steps S209-S210, Figure 3 Five segmented paths are obtained, namely, "power station-first circuit breaker", "first circuit breaker-second circuit breaker", "first circuit breaker-third circuit breaker", "second circuit breaker-branch point equipment" and "third circuit breaker-distribution transformer equipment", and each segmented path contains multiple cable equipment nodes between the two end nodes of the segmented path.

[0075] S211. For each segmented path, determine the cable electrical parameter attributes of each intermediate node between two end nodes according to the parameter superposition topology diagram.

[0076] Specifically, since electrical parameter attributes have been superimposed on the distribution transformer equipment nodes and cable equipment nodes in the parameter superposition topology diagram, and each intermediate node between the two end nodes in each segmented path is a cable equipment node, the cable electrical parameter attributes of each cable equipment node as an intermediate node can be directly obtained from the parameter superposition topology diagram.

[0077] S212: construct a cable segment set node to replace each intermediate node and the connection edges between each intermediate node, and add the electrical parameter attributes of each cable respectively to determine the cable electrical parameter attributes of the cable segment set node.

[0078] Specifically, a cable segment collection node is constructed as a fusion node of all intermediate nodes in a segmented path, and the connection edges between the intermediate nodes and the connection edges between the intermediate nodes and the corresponding two end nodes are replaced with the connection edges between the end nodes in the segmented path and the cable segment collection node, thereby completing the replacement of the topological connection relationship. At the same time, since the cable electrical parameter attributes include attribute types such as length, resistance, reactance, and capacitance as shown in the above example, the cable electrical parameter attributes of each intermediate node belonging to the same attribute type can be added according to the different attribute types, and the result of the addition is used as the cable electrical parameter attribute corresponding to the attribute type in the cable segment collection node, and after the cable electrical parameter attributes of all attribute types are added, the cable electrical parameter attributes corresponding to the cable segment collection node are obtained.

[0079] S213: In each segment path, respectively determine the same end nodes between adjacent segment paths.

[0080] Specifically, since two adjacent segment paths in each segment path will share a common end node, that is, the end node that is the end node in the previous segment path will be the first node in the next segment path, the interconnection relationship between different segment paths can be clarified. Therefore, in order to realize the splicing of each segment path after the intermediate nodes are merged, the common end nodes between adjacent segment paths can be determined in each segment path as the basis for subsequent reconnection.

[0081] S214, taking the same end nodes as connection points, combining the end nodes and the cable segment set nodes corresponding to the end nodes to generate a power flow calculation thematic map.

[0082] Continuing with the above example, Figure 4 This is a structural example diagram of a power flow calculation thematic diagram provided in the second embodiment of the present invention, with the above Figure 3 Taking the parameter superposition topology diagram and the different segmented paths therein as an example, the intermediate nodes corresponding to each of the five segmented paths of "power station-first circuit breaker", "first circuit breaker-second circuit breaker", "first circuit breaker-third circuit breaker", "second circuit breaker-branch point equipment" and "third circuit breaker-distribution transformer equipment" can be merged and converted into a cable segment collection node. The five converted segmented paths can be expressed as "power station-cable segment collection node-first circuit breaker", "first circuit breaker-cable segment collection node-second circuit breaker", "first circuit breaker-cable segment collection node-third circuit breaker", "second circuit breaker-cable segment collection node-branch point equipment" and "third circuit breaker-cable segment collection node-distribution transformer equipment", and then taking the same end nodes as connection points, combining each end node and the cable segment collection nodes corresponding to each end node, we can get the following. Figure 4 The power flow calculation thematic map shown.

[0083] The technical solution of this embodiment first completes the construction of the power grid topology map based on the power grid equipment resource data, and then screens the nodes in the power grid topology map related to the construction and switching of the distribution network path based on the homeomorphic topological transformation method, so that the generated simplified power grid topology map does not contain nodes that are not related to the power flow calculation, thereby realizing the simplification of the topology map. Further, based on the distribution transformer equipment attribute data set and the cable equipment attribute data set contained in the power grid equipment asset data, electrical parameter attributes are added to the nodes of the distribution transformer equipment type and the cable equipment type in the simplified power grid topology map, so that the generated parameter superposition topology map contains both the equipment information required to construct the traditional power grid thematic map and the asset data information associated with the electrical calculation. Further based on the node type of each node in the parameter overlay topology map, the parameter overlay topology map is divided into multiple segmented paths according to the power grid topology nodes that are not cable equipment types, and then multiple intermediate nodes belonging to the cable equipment type in each segmented path are merged into a cable segment collection node, and the electrical parameter attributes of all intermediate nodes are retained in the cable segment collection node, so that the generated power flow calculation thematic map is more concise and intuitive without losing the calculation-related attribute data, and has the characteristics of easy calculation, so as to meet the needs of electrical characteristic calculation in the scientific management of the distribution network.

[0084] Embodiment 3

[0085] Figure 5 A schematic diagram of the structure of a power flow calculation thematic map generating device provided in the third embodiment of the present invention is shown in FIG. Figure 5 As shown, the power flow calculation thematic map generating device includes a data acquisition module 31 , a simplified topology generating module 32 , a parameter topology generating module 33 , a set node determining module 34 and a thematic map generating module 35 .

[0086] Among them, the data acquisition module 31 is used to acquire the power grid equipment resource data and the power grid equipment asset data; the simplified topology generation module 32 is used to construct a power grid topology map according to the power grid equipment resource data, and simplify the power grid topology map based on the preset retained node type to generate a simplified power grid topology map; the parameter topology generation module 33 is used to superimpose the power grid equipment asset data onto the simplified power grid topology map to generate a parameter superposition topology map; the collection node determination module 34 is used to divide the parameter superposition topology map into multiple segmented paths, and merge the intermediate nodes between the two end nodes of each segmented path to determine the cable segment collection node corresponding to the segmented path; the thematic map generation module 35 is used to combine the end nodes and cable segment collection nodes corresponding to each segmented path to generate a flow calculation thematic map; wherein the power grid topology map and the simplified power grid topology map are homeomorphic topologies.

[0087] The technical solution of the embodiment of the present invention, when constructing a thematic map for power distribution network flow calculation, firstly simplifies and screens out the nodes that are not closely related to the flow calculation management in the power grid topology map constructed based on the power grid equipment resource data, and obtains a simplified power grid topology map that is homeomorphic to the original power grid topology map, and then superimposes the power grid equipment asset data on the simplified power grid topology map, so that the generated parameter superposition topology map contains both the equipment information required to construct the traditional power grid thematic map and the asset data information associated with the electrical calculation, so that the thematic map generated based on the parameter superposition topology map can be more suitable for the power distribution network flow calculation needs. At the same time, when generating the power flow calculation thematic map, the nodes in the parameter superposition topology map that are not related to the power grid path division are merged with the asset data parameters retained, so that the generated power flow calculation thematic map is more concise and intuitive without losing the attribute data related to the calculation, and has the characteristics of being easy to calculate, so as to meet the needs of electrical characteristic calculation in the scientific management process of the distribution network.

[0088] Optionally, the simplified topology generation module 32 includes:

[0089] A node relationship determination unit, used to determine the power grid topology nodes and the physical connection relationship between the power grid topology nodes according to the power grid equipment resource data;

[0090] A power grid topology construction unit, used to construct a power grid topology map according to each power grid topology node and each physical connection relationship;

[0091] A simplified topology generation unit, used for performing a homeomorphic topological transformation on the power grid topology map according to preset reserved node types and node types of each power grid topology node in the power grid topology map to generate a simplified power grid topology map;

[0092] Among them, the preset reserved node type is the node type related to the path and on-off in the distribution network.

[0093] Optionally, the power grid equipment asset data includes a distribution transformer equipment attribute data set and a cable equipment attribute data set;

[0094] Accordingly, the parameter topology generation module 33 includes:

[0095] A node extraction unit is used to extract distribution transformer device nodes and cable device nodes of the distribution transformer device type and cable device type from the simplified power grid topology diagram;

[0096] The distribution transformer attribute superposition unit is used to superimpose the distribution transformer electrical parameter attributes for each distribution transformer device node according to the distribution transformer device attribute data set;

[0097] A cable attribute superposition unit, used for superimposing cable electrical parameter attributes for each cable device node according to the cable device attribute data set;

[0098] The superposition topology generation unit is used to update the simplified power grid topology diagram by superimposing the distribution transformer equipment nodes after the distribution transformer electrical parameter attributes are superimposed, and the cable equipment nodes after the cable electrical parameter attributes are superimposed, so as to generate a parameter superposition topology diagram.

[0099] Among them, the electrical parameter attributes of the distribution transformer include at least rated capacity, short-circuit impedance, short-circuit loss, no-load current and no-load loss; the electrical parameter attributes of the cable include at least length, resistance, reactance and capacitance.

[0100] Optionally, the collection node determination module 34 includes:

[0101] A target node determination unit, used for determining a power grid topology node whose node type in the parameter superposition topology diagram is not a cable device type as a target node;

[0102] A segmented path determination unit, used to determine the path between two adjacent target nodes in the parameter overlay topology map as a segmented path of the parameter overlay topology map;

[0103] A parameter attribute determination unit, for determining, for each segmented path, the cable electrical parameter attributes of each intermediate node between two end nodes according to the parameter superposition topology diagram;

[0104] The set node determination unit is used to construct a cable segment set node to replace each intermediate node and the connection edges between each intermediate node, and to add the electrical parameter attributes of each cable respectively to determine the cable electrical parameter attributes of the cable segment set node.

[0105] Optionally, the thematic map generation module 35 includes:

[0106] A same-endpoint determination unit, used for respectively determining the same end nodes between adjacent segment paths in each segment path;

[0107] The thematic map generating unit is used to combine each end node and the cable segment set node corresponding to each end node with each same end node as a connection point to generate a power flow calculation thematic map.

[0108] The power flow calculation thematic map generating device provided by the embodiment of the present invention can execute the power flow calculation thematic map generating method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0109] Embodiment 4

[0110] Figure 6A schematic diagram of the structure of a power flow calculation thematic map generation device provided for the fourth embodiment of the present invention. The power flow calculation thematic map generation device 40 may be intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The power flow calculation thematic map generation device 40 may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0111] like Figure 6 As shown, the power flow calculation thematic map generating device 40 includes at least one processor 41, and a memory connected to the at least one processor 41, such as a read-only memory (ROM) 42, a random access memory (RAM) 43, etc., wherein the memory stores a computer program that can be executed by the at least one processor, and the processor 41 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 42 or the computer program loaded from the storage unit 48 to the random access memory (RAM) 43. In the RAM 43, various programs and data required for the operation of the power flow calculation thematic map generating device 40 can also be stored. The processor 41, the ROM 42 and the RAM 43 are connected to each other through a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0112] Multiple components in the power flow calculation thematic map generating device 40 are connected to the I / O interface 45, including: an input unit 46, such as a keyboard, a mouse, etc.; an output unit 47, such as various types of displays, speakers, etc.; a storage unit 48, such as a disk, an optical disk, etc.; and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the power flow calculation thematic map generating device 40 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0113] The processor 41 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 41 executes the various methods and processes described above, such as a method for generating a thematic map for power flow calculation.

[0114] In some embodiments, the power flow calculation thematic map generation method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 48. In some embodiments, part or all of the computer program can be loaded and / or installed on the power flow calculation thematic map generation device 40 via the ROM 42 and / or the communication unit 49. When the computer program is loaded into the RAM 43 and executed by the processor 41, one or more steps of the power flow calculation thematic map generation method described above can be performed. Alternatively, in other embodiments, the processor 41 can be configured to execute the power flow calculation thematic map generation method in any other appropriate manner (for example, by means of firmware).

[0115] Optionally, an embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the method for generating a thematic diagram for power flow calculation provided by any embodiment of the present invention.

[0116] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0118] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0119] To provide interaction with a user, the systems and techniques described herein may be implemented on a power flow calculation thematic map generating device, which has: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which a user may provide input to the power flow calculation thematic map generating device. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0120] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0121] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0122] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0123] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for generating a thematic map for power flow calculation, characterized in that: include: Obtaining power grid equipment resource data and power grid equipment asset data; Constructing a power grid topology map according to the power grid equipment resource data, and simplifying the power grid topology map based on preset reserved node types to generate a simplified power grid topology map; Overlaying the power grid equipment asset data onto the simplified power grid topology map to generate a parameter overlay topology map; Dividing the parameter superposition topology graph into a plurality of segment paths, and merging each intermediate node between two end nodes of each segment path to determine a cable segment set node corresponding to the segment path; The end nodes and the cable segment set nodes corresponding to each of the segmented paths are combined to generate a power flow calculation thematic map; Wherein, the power grid topology diagram and the simplified power grid topology diagram are homeomorphic topologies; The preset reserved node type is a node type related to paths and on-off in the distribution network; The power grid equipment asset data includes a distribution transformer equipment attribute data set and a cable equipment attribute data set; The step of superimposing the power grid equipment asset data onto the simplified power grid topology map to generate a parameter superimposed topology map includes: Extracting distribution transformer device nodes and cable device nodes whose node types are distribution transformer device type and cable device type from the simplified power grid topology diagram; According to the distribution transformer attribute data set, the distribution transformer electrical parameter attributes are superimposed on each of the distribution transformer nodes; superimposing cable electrical parameter attributes for each of the cable equipment nodes according to the cable equipment attribute data set; The simplified power grid topology diagram is updated by superimposing the distribution transformer equipment nodes after the distribution transformer electrical parameter attributes are superimposed, and the cable equipment nodes after the cable electrical parameter attributes are superimposed, so as to generate a parameter superimposed topology diagram.

2. The method according to claim 1, characterized in that Constructing a power grid topology map according to the power grid equipment resource data, and simplifying the power grid topology map based on preset reserved node types to generate a simplified power grid topology map, including: Determine the power grid topology nodes and the physical connection relationship between the power grid topology nodes according to the power grid equipment resource data; Constructing a power grid topology map according to each of the power grid topology nodes and each of the physical connection relationships; According to the preset reserved node types and the node types of each of the power grid topology nodes in the power grid topology diagram, a homeomorphic topological transformation is performed on the power grid topology diagram to generate a simplified power grid topology diagram.

3. The method according to claim 1, characterized in that The electrical parameter attributes of the distribution transformer include at least rated capacity, short-circuit impedance, short-circuit loss, no-load current and no-load loss; The cable electrical parameter properties include at least length, resistance, reactance and capacitance.

4. The method according to claim 1, characterized in that: The step of dividing the parameter superposition topology map into a plurality of segmented paths includes: Determine a power grid topology node in the parameter superposition topology graph whose node type is not the cable device type as a target node; The path between two adjacent target nodes in the parameter overlay topology graph is determined as a segmented path of the parameter overlay topology graph.

5. The method according to claim 4, characterized in that The step of merging each intermediate node between two end nodes of each segment path to determine a cable segment set node corresponding to the segment path includes: For each of the segmented paths, determining the cable electrical parameter attributes of each intermediate node between two end nodes according to the parameter superposition topology graph; A cable segment set node is constructed to replace each of the intermediate nodes and the connection edges between the intermediate nodes, and the electrical parameter attributes of each cable are added respectively to determine the cable electrical parameter attributes of the cable segment set node.

6. The method according to claim 1, characterized in that The step of combining the end nodes and the cable segment set nodes corresponding to each of the segmented paths to generate a power flow calculation thematic diagram includes: In each of the segmented paths, respectively determining the same end nodes between adjacent segmented paths; Taking the same end nodes as connection points, the end nodes and the cable segment set nodes corresponding to the end nodes are combined to generate a power flow calculation thematic map.

7. A device for generating thematic diagrams for power flow calculation, characterized in that: include: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for generating a thematic map for power flow calculation according to any one of claims 1 to 6.

8. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the method for generating thematic diagrams for power flow calculation according to any one of claims 1 to 6 when executed by a computer processor.

9. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for generating a thematic map for power flow calculation according to any one of claims 1 to 6 is implemented.

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