Substation secondary system modeling method and system based on multi-dimensional coupling

Abstract

The application discloses a transformer substation secondary system modeling method and system based on multi-dimensional coupling, relates to the technical field of power system automation, and comprises the following steps: decomposing a transformer substation secondary equipment construction device connection topology structure; combining a work target to analyze electric signal transmission, obtaining a signal transmission topology and a geometric relationship with the device structure; building a multi-level model architecture; and using coding rules to match mapping and data fitting to construct a secondary system model. The application solves the technical problem that the existing transformer substation secondary system modeling method is difficult to realize multi-dimensional information coupling and hierarchical coding mapping in an information physical system, leading to the fact that physical entities and digital models cannot be effectively associated and it is difficult to meet the requirements of precise analysis and control, achieves the coupling of multi-dimensional information such as transformer substation secondary system device connection, signal transmission and three-dimensional space and hierarchical coding mapping, effectively associates physical entities and digital models, and meets the technical effect of meeting the requirements of precise analysis and control under the information physical system.

Description

Technical Field

[0001] This invention relates to the field of power system automation technology, and in particular to a substation secondary system modeling method and system based on multidimensional coupling. Background Technology

[0002] Substation secondary systems are the core of safe power system operation, and accurate modeling of them is crucial for system control, especially under the trend of cyber-physical systems (CPS) convergence. Existing technologies often employ single-dimensional modeling, focusing only on physical equipment connections or signal transmission logic, failing to achieve multi-dimensional coupling of equipment structure, signal transmission, and spatial layout, and lacking a unified hierarchical association mechanism. This makes it difficult for physical entities and digital models to interact deeply, failing to fully reflect system characteristics and meet the needs of CPS for accurate analysis and intelligent operation and maintenance of substation secondary systems. Summary of the Invention

[0003] This application provides a substation secondary system modeling method and system based on multidimensional coupling, which is used to solve the technical problem that existing substation secondary system modeling methods in cyber-physical systems are difficult to achieve multidimensional information coupling and hierarchical coding mapping, resulting in the inability to effectively associate physical entities with digital models and making it difficult to meet the technical requirements of accurate analysis and control.

[0004] The first aspect of this application provides a substation secondary system modeling method based on multidimensional coupling. The method includes: decomposing the secondary equipment of the substation and constructing the equipment connection topology; performing electrical signal transmission analysis based on the equipment connection topology and the substation's working objectives to obtain the signal transmission topology and establish the corresponding geometric relationship between signal transmission and equipment structure; building a multi-level model architecture, including signal transmission, physical structure, and three-dimensional equipment space, with each model level having a level-one encoding mapping rule; and using the level-one encoding mapping rule of the multi-level model architecture to match and map the equipment connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and equipment structure, generating level-one codes and performing data fitting to construct a substation secondary system model.

[0005] The second aspect of this application provides a substation secondary system modeling system based on multidimensional coupling. The system includes: a device connection topology construction module for decomposing the secondary equipment of the substation and constructing a device connection topology; a signal transmission topology acquisition module for analyzing electrical signal transmission based on the device connection topology and the substation's operational objectives to obtain a signal transmission topology and establish a corresponding geometric relationship between signal transmission and device structure; a multi-level model architecture construction module for building a multi-level model architecture, including signal transmission, physical structure, and three-dimensional device space, with each model level having a level-one encoding mapping rule; and a secondary system model construction module for matching and mapping the device connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and device structure using the level-one encoding mapping rules of the multi-level model architecture, generating level-one codes, performing data fitting, and constructing a substation secondary system model.

[0006] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0007] This application constructs a substation secondary system model by decomposing the equipment connection topology, analyzing the signal transmission logic and establishing the geometric relationship with the equipment structure, building a multi-level model architecture of signal transmission, physical structure, and three-dimensional equipment space, and configuring hierarchical coding mapping rules to achieve multi-dimensional information association. This constructs a substation secondary system model covering equipment, signal, and spatial dimensions, making the precise analysis and intelligent control of the power system under the cyber-physical system more efficient and reliable. It achieves the coupling and hierarchical coding mapping of multi-dimensional information such as equipment connection, signal transmission, and three-dimensional space in the substation secondary system, effectively associating physical entities with digital models, and meeting the technical effect of precise analysis and control requirements under the cyber-physical system. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a flowchart illustrating the substation secondary system modeling method based on multidimensional coupling provided in the embodiments of this application.

[0010] Figure 2 This is a schematic diagram of the substation secondary system modeling system based on multidimensional coupling provided in the embodiments of this application.

[0011] Figure labeling: Device connection topology construction module 1, signal transmission topology acquisition module 2, multi-level model architecture construction module 3, secondary system model construction module 4. Detailed Implementation

[0012] This application provides a substation secondary system modeling method and system based on multidimensional coupling, which is used to solve the technical problem that existing substation secondary system modeling methods in cyber-physical systems are difficult to achieve multidimensional information coupling and hierarchical coding mapping, resulting in the inability to effectively associate physical entities with digital models and making it difficult to meet the technical requirements of accurate analysis and control.

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or modules not explicitly listed or inherent to such processes, methods, products, or devices.

[0015] Example 1, as Figure 1 As shown, a substation secondary system modeling method based on multidimensional coupling is described, wherein the method includes:

[0016] Step A100: Decompose the secondary equipment of the substation and construct the equipment connection topology.

[0017] In this embodiment of the application, secondary equipment refers to equipment in a substation including protection devices, measurement and control devices, terminal blocks, cables, optical fibers, circuit breakers, and pressure plates.

[0018] Specifically, identify all secondary equipment, including protection devices, determine the connection relationships of cables, optical fibers, etc., and then construct a device connection topology diagram to clarify the physical and logical connection paths. The specific steps are explained in detail in A110-A130.

[0019] Step A200: Based on the equipment connection topology and the substation's working objectives, perform electrical signal transmission analysis to obtain the signal transmission topology and establish the corresponding geometric relationship between signal transmission and equipment structure.

[0020] Optionally, based on the equipment connection topology, and combined with the substation's working objectives, analyze the transmission paths of electrical signals such as protection actions, establish a signal transmission topology diagram, and then map the transmission paths to the secondary equipment geometry to determine the corresponding geometric relationships. Specific steps are detailed in A210-A240.

[0021] Step A300: Build a multi-level model architecture, including signal transmission, physical structure, and three-dimensional device space. Each model level has a level of encoding and mapping rules.

[0022] In one embodiment of this application, when building a multi-level model architecture, signal transmission, physical structure, and three-dimensional device space model levels are constructed respectively. After mapping and connecting them, the level encoding mapping rules are configured to ensure that information at different levels can be associated accordingly. The specific steps are described in detail in A310-A340.

[0023] Step A400: Using the hierarchical coding mapping rules of the multi-level model architecture, match and map the device connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and device structure to generate codes at each level and perform data fitting to construct a substation secondary system model.

[0024] Specifically, when using the hierarchical encoding mapping rules of a multi-level model architecture, it is necessary to first clarify the attribute identifiers, hierarchical identifiers, and inter-hierarchical identifiers included in the rules. These identifiers are used for unique element identification, hierarchical differentiation, and cross-hierarchical association, respectively.

[0025] First, a matching and mapping process is performed on the device connection topology. This involves traversing all secondary devices in the constructed device connection topology, such as 12 sets of protection devices, 10 sets of measurement and control devices, and 60 cables, as well as their connection relationships, such as cable connections and fiber optic connections. Based on attribute identification rules, a unique code is assigned to each device and connection path, such as protection devices PD-001 to PD-12 and cables CL-001 to CL-60. At the same time, the physical structure level to which it belongs is marked by a hierarchical identifier, forming a preliminary coding system for the physical structure level.

[0026] Next, the signal transmission topology is matched and mapped. Based on the transmission paths of 80 protection action signals and 50 measurement and control signals in the signal transmission topology, unique codes are assigned according to attribute identification rules, such as SP-001 to SP-80 and MS-001 to MS-50. The signal transmission level to which it belongs is marked by a hierarchical identifier, prefixed with SG. In this process, it is necessary to ensure that the signal code and the corresponding device code are associated through inter-hierarchical identifiers. For example, SP-042 (a protection action signal) and PD-003 (the corresponding protection device) are associated through SG-SP042-PH-PD003, clarifying the correspondence between the signal and the device.

[0027] For the corresponding geometric relationship between signal transmission and equipment structure, it is necessary to combine the coding rules of the three-dimensional equipment spatial model hierarchy, prefix 3D, and bind the specific location of the signal transmission path on the equipment, such as the X1 interface of the protection device PD-003, the three-dimensional coordinates (8.3 meters, 5.2 meters, 0.9 meters) with the signal code and equipment code through inter-level identifiers to form cross-level codes such as SG-SP042-3D-PD003-X1, which accurately records the spatial position and direction of the signal path in the equipment geometry.

[0028] After completing the above matching and mapping, codes for each level are generated, including PH-PD-003 and PH-CL-025 at the physical structure level, SG-SP-042 at the signal transmission level, and 3D-PD-003 at the three-dimensional device space level. Data fitting is then performed, and the correlation between different level codes is verified using the hierarchical coding mapping rules. For example, it verifies whether PH-CL-025 (cable) is correctly associated with SG-SP-042 (signal) and 3D-PD-003 (device), ensuring logical and spatial consistency of the data. Random sampling verification is performed on 10% of the codes, with a pass rate of over 98%.

[0029] Finally, by integrating the codes and relationships at each level that have been fitted with data, a substation secondary system model is constructed that covers the physical connection of equipment, signal transmission logic, and three-dimensional spatial location. The code of any element in the model can be traced back to its attributes and related information at different levels.

[0030] By utilizing hierarchical coding mapping rules to match and map equipment connections, signal transmissions, and geometric relationships, and generating and fitting codes at each level, the substation secondary system model with multi-dimensional coupling and interconnected information is constructed, providing a complete digital carrier for the accurate analysis and control of the system.

[0031] Furthermore, step A400 in the method provided in this application embodiment includes:

[0032] A510: Establish a full-cycle node chain for the substation, with each cycle node having constraint parameters.

[0033] A520: Embed the multi-level model architecture into each cycle node in the full-cycle node chain of the substation, and use the constraint parameters to select parameters for the multi-level model architecture to obtain the full-cycle hierarchical model structure.

[0034] A530: Using the constraint parameters and hierarchical coding mapping rules of the full-cycle hierarchical model structure, the equipment connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and equipment structure are matched and mapped by parameter selection and hierarchical coding mapping rules to generate hierarchical codes for each cycle node and perform data fitting to construct the substation secondary system model.

[0035] Specifically, establishing a full-cycle node chain for a substation requires covering all stages, including manufacturing, design, construction, and operation and maintenance. Each stage is designated as an independent cycle node, and each node has constraint parameters set based on its core tasks. For example, constraint parameters for the manufacturing node include equipment dimensional tolerances and material temperature ranges; constraint parameters for the design node include equipment layout spacing and signal transmission delay thresholds; constraint parameters for the construction node include cable laying bending radius and fiber optic splicing loss; and constraint parameters for the operation and maintenance node include equipment inspection cycles and signal anomaly response times. By analyzing the core requirements of each stage, multiple full-cycle nodes are ultimately determined, each containing 3-5 constraint parameters, forming a complete node chain.

[0036] Then, when embedding the multi-level model architecture into each node of the full-cycle node chain, targeted adjustments need to be made to the signal transmission, physical structure, and 3D equipment space levels of the model architecture based on the node's constraint parameters. For example, at the manufacturing node, the focus is on adjusting the parameters of the 3D equipment space model level to match its geometric dimensions with manufacturing tolerance constraints, such as controlling the dimensional accuracy of the 3D model of the protection device within ±1mm; at the design node, the focus is on optimizing the layout parameters of the physical structure model level to ensure that the equipment spacing meets design constraints, such as modeling the distance between the terminal block and the edge of the cabinet strictly according to parameters ≥150mm; at the construction node, the path parameters of the signal transmission model level are strengthened to adapt to constraints such as the bending radius of cable laying, such as setting the bending angle of the transmission path model of No. 25 cable to ≥90 degrees. Through this embedding method, the multi-level model architecture can meet specific constraints at each node.

[0037] Subsequently, when selecting parameters and matching codes using the constraint parameters and hierarchical coding mapping rules of the full-cycle hierarchical model structure, work needs to be carried out according to the characteristics of different nodes. For example, the construction node, based on the bending radius constraint of cable laying, selects multiple cables that meet the bending requirements from the equipment connection topology and assigns them construction stage codes with the C prefix, such as C-PH-CL-025; the operation and maintenance node, based on the inspection cycle constraint, extracts the key signal paths that need to be monitored monthly from the signal transmission topology and assigns operation and maintenance codes with the O prefix, such as O-SG-SP-042. At the same time, the hierarchical coding mapping rules ensure the coherence of codes across nodes. For example, the M-3D-PD-003 of the manufacturing node and the D-PH-PD-003 of the design node are associated through inter-level identifiers to ensure the consistency of equipment parameters from manufacturing to design.

[0038] After generating the hierarchical codes for each cycle node, data fitting is performed to verify the matching degree of different node codes in terms of parameters and logic. For example, the compatibility between the equipment size code of the manufacturing node and the layout code of the design node is verified to ensure that the error between the actual equipment size and the design reserved space is ≤5%; the correlation between the cable connection code of the construction node and the signal transmission code of the operation and maintenance node is verified to ensure that the mapping error between the physical connection status of the cable and the signal transmission quality is ≤3%. Through multiple rounds of fitting, the codes of all cycle nodes are finally made to form a coherent logical closed loop in the entire cycle chain.

[0039] By establishing a full-cycle node chain and embedding a multi-level model architecture, and combining constraint parameters and coding rules for parameter selection, coding matching, and data fitting, the substation secondary system model covering the entire process from manufacturing to operation and maintenance and supporting intelligent applications in multiple scenarios has been constructed. This has achieved precise coupling and sharing of physical circuits, information circuits, and 3D models throughout the entire lifecycle.

[0040] Furthermore, step A100 in the method provided in this application embodiment includes:

[0041] A110: Identifies all secondary equipment in a substation, including protection devices, monitoring and control devices, terminal blocks, cables, optical fibers, circuit breakers, and pressure plates.

[0042] A120: Determine the connection relationships between various secondary devices, including cable connections, fiber optic connections, and virtual terminal connections.

[0043] A130: Based on the secondary devices and their connection relationships, construct a device connection topology diagram to clarify the physical connection paths and logical connection relationships between each device.

[0044] In this embodiment, a virtual terminal is a connection relationship between secondary equipment in a substation, used to realize logical signal interaction between different electronic devices.

[0045] Optionally, during the modeling of the substation secondary system, it is necessary to first comprehensively identify all secondary equipment. This process needs to cover various types of equipment such as protection devices, measurement and control devices, terminal blocks, cables, optical fibers, circuit breakers, and pressure plates. For example, a substation may contain 12 sets of protection devices (covering different protection functions such as line and main transformer protection), 10 sets of measurement and control devices, 25 terminal blocks, 60 cables, 40 optical fibers, 50 circuit breakers, and 60 pressure plates. Those skilled in the art can ensure that no equipment is omitted by combining equipment ledger verification with on-site inspection.

[0046] After completing equipment identification, the connection relationships between various secondary devices are further determined. Among these, protection devices and terminal blocks are mostly connected by cables; for example, a group of line protection devices is connected to its corresponding terminal block via six cables. Measurement and control devices and communication switches are mainly connected via optical fibers; in a typical scenario, eight sets of measurement and control devices would be connected to the switch via 24 optical fibers. The logical signal interaction between different intelligent electronic devices (IEDs) relies on virtual terminal connections. A medium-sized substation can have up to 120 such connections. By reviewing equipment interface documentation and communication protocols, the type and direction of each connection are clarified.

[0047] Based on the identified secondary devices and their connections, a device connection topology diagram can be constructed. The diagram must clearly indicate physical connection paths, such as cables extending from the X1 interface of the protection device to the 8th terminal of the terminal block, and optical fibers connecting from the P2 optical port of the monitoring and control device to the S5 optical port of the switch. Logical connection relationships must also be clearly defined, such as virtual terminal connections corresponding to the transmission logic of protection start signals from device A to device B. This topology structure provides a clear visual representation of the physical connections and logical relationships of all secondary devices.

[0048] By comprehensively identifying secondary devices, clarifying various connection relationships, and constructing a topology diagram, the physical connection paths and logical connection relationships of each device are clearly defined, providing a basic framework for subsequent signal transmission analysis and multi-level model construction.

[0049] Furthermore, step A200 in the method provided in this application embodiment includes:

[0050] A210: Analyze the substation's operational objectives and determine the functional requirements and signal transmission requirements of each secondary device.

[0051] A220: Based on the equipment connection topology, combined with the functional requirements and signal transmission requirements, analyze the transmission path of electrical signals between various secondary devices, including protection action signals, measurement and control signals, and communication signals.

[0052] A230: Based on the transmission path of the electrical signal between each secondary device, establish a signal transmission topology diagram and clarify the starting point, ending point and intermediate nodes of the signal transmission.

[0053] A240: Based on the signal transmission topology, the signal transmission path is mapped in the geometry of the secondary equipment to determine the corresponding geometric relationship between the signal transmission path and the structure of the secondary equipment, including the specific position and direction of the signal transmission path on the equipment.

[0054] Specifically, firstly, the operational objectives of the substation are analyzed to clarify the functional requirements and signal transmission requirements of each secondary device. The core operational objectives of a substation include ensuring the safe and stable operation of the power system and achieving rapid fault isolation and recovery. Correspondingly, for secondary devices, protection devices must possess fault detection and rapid response capabilities. Therefore, they need to receive sampling signals such as current and voltage, and output protection action signals such as tripping. For example, a substation's line protection device needs to receive 30 sets of current and voltage sampling signals per second, and must issue a tripping signal within 50 milliseconds in the event of a fault. The monitoring and control device is responsible for equipment status monitoring and control, requiring the collection of status signals such as switch positions and temperatures and uploading them to the backend, such as uploading the main transformer oil temperature signal every 10 seconds, while simultaneously receiving remote control commands. Communication equipment must ensure reliable transmission of various signals, guaranteeing data latency of no more than 100 milliseconds.

[0055] Next, based on the established equipment connection topology and the aforementioned functional requirements and signal transmission requirements, the transmission paths of electrical signals between various secondary devices can be analyzed. The equipment connection topology clearly defines the physical and logical links, such as the cable connection between the protection device and the terminal block, the fiber optic connection between the measurement and control device and the switch, and the virtual terminal connection between intelligent devices. Based on this, the protection action signal starts from the output interface of the protection device, connects to the terminal block via cable, and then is transmitted to the trip coil of the circuit breaker via cable. For example, the protection action signal path for a certain line is: X2 interface of the line protection device → terminal block terminal 5 → relay coil → circuit breaker trip circuit; the measurement and control signal starts from the sensor, enters the analog input interface of the measurement and control device via shielded cable, and then is transmitted to the back-end system via fiber optic cable through the switch. For example, the bus voltage signal path involves sensor → AI1 interface of the measurement and control device → fiber optic converter → back-end server; communication signals are transmitted in a loop between switches via fiber optic cables. For example, the communication signal between the station control layer switch and the bay layer switch is transmitted via two redundant fiber optic cables to ensure automatic switching in case of interruption.

[0056] Then, based on the analyzed electrical signal transmission path, a signal transmission topology diagram can be established, clearly marking the start point, end point, and intermediate nodes of the signal transmission. For example, the start point of a protection action signal is the protection device, the intermediate nodes include terminal blocks and relays, and the end point is the circuit breaker; the start point of a measurement and control signal is various sensors, the intermediate nodes include measurement and control devices, fiber optic converters, and switches, and the end point is the monitoring backend; the start point and end point of a communication signal are switches with different functions, and the intermediate node is a fiber optic connection point. The attributes of each node in the topology diagram need to be clearly defined. For example, in a protection action signal topology diagram, the start point is marked as the line protection device LP1, the intermediate nodes are marked as terminal block TZ2-5 and relay J1, and the end point is marked as the circuit breaker QF1 trip coil, with arrows indicating the signal transmission direction.

[0057] Next, the signal transmission path is mapped to the geometry of the secondary equipment to determine the corresponding geometric relationship between the signal transmission path and the equipment structure. For example, the starting point of the protection action signal on the protection device is located at the X2 interface below its front panel, with coordinates corresponding to (200mm, 450mm) in the equipment's geometric model. The signal transmission direction is horizontal to the right and is connected to the 5th terminal on the left side of the terminal block via a 1.2-meter cable. The position of this terminal in the terminal block's geometric model is (50mm, 120mm), and its direction is vertically upward. The entry point of the measurement and control signal on the measurement and control device is the AI1 interface on the right side of the back, corresponding to geometric coordinates (350mm, 200mm). The signal direction is vertically backward and connected to a 6mm diameter cable, which is laid along the cable tray on the top of the equipment. The cable tray's direction in three-dimensional space forms a 30-degree angle with the top surface of the equipment.

[0058] By analyzing the work objectives, clarifying signal requirements, analyzing transmission paths, constructing topology diagrams, and mapping geometric relationships, the system effectively defined the spatial relationship between signal transmission logic and device structure, providing a precise basis for the coupling of signal transmission levels with physical and spatial levels in a multi-level model architecture.

[0059] Furthermore, step A300 in the method provided in this application embodiment includes:

[0060] A310: Construct a hierarchical model of signal transmission, describing the logical relationships and paths of signal transmission.

[0061] A320: Constructs a physical structure model hierarchy to describe the physical connections and layout of devices.

[0062] A330: Construct a hierarchical structure for the spatial model of a 3D device, describing the device's 3D geometry and spatial location.

[0063] A340: The signal transmission model level, physical structure model level, and three-dimensional device space model level are mapped and connected to construct the multi-level model architecture. The hierarchical encoding mapping rules are configured according to the hierarchical relationship of the descriptive features of each level to ensure that the information between different levels can correspond and be associated.

[0064] Specifically, when constructing the signal transmission model hierarchy, based on the electrical signal transmission paths analyzed in step A220, the logical relationships and specific directions of various signals are clarified. For example, for protection action signals, the logical chain from the protection device, through virtual terminals or cables, to the execution device is defined. For instance, the trip signal of a main transformer protection device logically needs to be judged by the starting element first, then sent to the circuit breaker monitoring and control device via a GOOSE message, and finally trigger the trip command. The model needs to mark the triggering conditions, transmission priorities, and interaction sequences of the signals, and the transmission delay of important protection signals needs to be controlled within 50ms. For monitoring and control signals, the entire process logic from sensor acquisition to background display needs to be described. For example, the temperature signal enters the monitoring and control device from the PT sensor through the analog-to-analog converter module, and then is uploaded to the monitoring system via an MMS message. The model needs to specify the signal sampling frequency (e.g., once every 100ms) and data format.

[0065] The construction of the physical structure model hierarchy needs to be based on the equipment connection topology, refining the physical connection methods and spatial layout of the equipment. For example, in a substation secondary equipment cabinet, 12 protection devices are arranged in 3 rows and 4 columns, with each device spaced 200mm apart. They are connected to the cabinet's grounding terminal via copper busbars, with a grounding resistance not exceeding 4Ω. Terminal blocks are fixed on the right side of the cabinet, 1500mm from the ground, and connected to the protection devices via cables with a cross-sectional area of ​​1.5mm². Each cable has cold-pressed terminals crimped at both ends, and the wire number and destination are marked. Optical fibers are laid through fiber optic channels at the top of the cabinet, with a bending radius of not less than 30mm. The optical fibers connected to the device's optical ports must be fixed with LC-type connectors to ensure that the insertion and removal loss is less than 0.5dB.

[0066] Constructing a hierarchical three-dimensional equipment spatial model requires relying on the equipment's geometric parameters and installation location to establish a precise three-dimensional digital representation. For example, the 3D model of the protection device is modeled according to its actual dimensions: 450mm long, 300mm wide, and 200mm high. Its 3D coordinates within the cabinet are (500mm, 300mm, 800mm). The 3D model of the terminal block is 600mm long, 100mm wide, and 200mm high, located within the cabinet at (1200mm, 300mm, 800mm). The 3D path of the cable is modeled according to its actual laying trajectory, extending from the coordinates of the bottom interface of the protection device (550mm, 300mm, 780mm) to the coordinates of the 15th terminal of the terminal block (1250mm, 320mm, 850mm), with a path length of 1.2m, representing a vertical drop of 0.3m and a horizontal distance of 0.8m in three-dimensional space.

[0067] Then, the three model levels are mapped and connected to establish clear association rules. For example, the main transformer protection trip signal in the signal transmission model corresponds to the physical connection of cable C15 in the physical structure model, and this cable is located on the path from (550mm, 300mm, 780mm) to (1250mm, 320mm, 850mm) in the three-dimensional equipment space model; the position of protection device 1 in the physical structure model corresponds to the coordinates (500mm, 300mm, 800mm) in the three-dimensional space model, and is logically associated with the overcurrent protection signal emitted by this device in the signal transmission model. Through this mapping, a one-to-one correspondence is formed between the logical transmission of signals, the physical connection of equipment, and the spatial position.

[0068] Then, by assigning a unique hierarchical code to each device, connection path, and signal transmission path, horizontal and vertical hierarchical refinement coding is performed and cross-mapping is used to construct a hierarchical refinement grid. The refinement code and hierarchical correspondence are determined through consistency and difference verification. Then, a mapping association with the unique attribute identifier is established to configure the hierarchical coding mapping rules. The specific steps are explained in detail in A341-A346.

[0069] By constructing and mapping signal transmission, physical structure, and three-dimensional equipment spatial model hierarchies, a multi-level model architecture capable of associating multi-dimensional information was built, providing a structured framework for multi-dimensional coupled modeling of substation secondary systems.

[0070] Furthermore, step A340 in the method provided in this application embodiment includes:

[0071] A341: Assign a unique hierarchical code to each device, connection path, and signal transmission path to ensure that each element has a unique attribute identifier in the model.

[0072] A342: Perform horizontal hierarchical refinement coding according to the hierarchical relationship of the descriptive features within each level.

[0073] A343: Perform vertical hierarchical refinement coding according to the association mapping relationship between each level.

[0074] A344: Cross-map the horizontal level refinement code with the vertical level refinement code to construct a level refinement grid.

[0075] A345: Perform consistency and difference verification based on the refined grid of the hierarchy to determine the refined code and the corresponding hierarchical correspondence.

[0076] A346: Establish the mapping association between the refined encoding and the unique attribute identifier, and determine the hierarchical encoding mapping rules.

[0077] Specifically, firstly, when assigning a unique hierarchical code to each device, connection path, and signal transmission path, all elements in the substation's secondary system must be covered. For example, protection devices can use "PD" as a prefix, combined with numbers to form PD-001 to PD-012, corresponding to 12 protection devices; cable connection paths can use "CL" as a prefix, numbered CL-001 to CL-060, corresponding to 60 cables; protection action signal paths can use "SP" as a prefix, numbered SP-001 to SP-080, corresponding to 80 protection action signal paths. Through this coding rule, each element obtains a unique attribute identifier, ensuring it can be individually identified in the model. For example, PD-003 represents the 3rd protection device, CL-025 represents the 25th cable, and SP-042 represents the 42nd protection action signal path.

[0078] Next, when performing horizontal hierarchical refinement coding according to the hierarchical relationship of descriptive features within each level, it is necessary to expand on the subdivided features within different model levels. In the signal transmission model level, protection action signals can be refined according to the protected object, such as SP-042-01 representing line protection action signals and SP-042-02 representing main transformer protection action signals; measurement and control signals can be refined according to the monitored object, such as MS-030-01 representing voltage measurement and control signals and MS-030-02 representing current measurement and control signals. In the physical structure model level, cable connections can be refined according to the laying area, such as CL-025-A representing cables in area A and CL-025-B representing cables in area B; terminal blocks can be refined according to the cabinet location, such as TP-018-1 representing the terminal block of cabinet 1 and TP-018-2 representing the terminal block of cabinet 2. Through horizontal refinement, elements within the same level form a more detailed coding system based on features.

[0079] Then, when refining the vertical hierarchy according to the mapping relationship between each level, the association between elements at different levels must be reflected. For example, SP-042 (protection action signal path) in the signal transmission model level is associated with CL-025 (cable connection path) in the physical structure model level, and the vertical encoding can be represented as SP-042-CL-025; this cable connection path is also associated with the three-dimensional coordinates of PD-003 (protection device) in the three-dimensional equipment space model level, further forming SP-042-CL-025-PD-003. As another example, the measurement and control signal path MS-030 is associated with the optical fiber connection path OF-015, and the vertical encoding is MS-030-OF-015, which is then associated with the three-dimensional position of the measurement and control device MD-005, forming MS-030-OF-015-MD-005, thus reflecting the cross-level association between signals, physical connections, and spatial positions.

[0080] Subsequently, when cross-mapping the horizontal and vertical hierarchical refinement codes, it is necessary to integrate the features of intra-level refinement and cross-level association. For example, in the signal transmission level, the horizontally refined SP-042-01 (line protection action signal) crosses with the vertically associated SP-042-CL-025 (signal and cable association) to form the grid node SP-042-01-CL-025; in the physical structure level, the horizontally refined CL-025-A (A-area cable) crosses with the vertically associated CL-025-PD-003 (cable and protection device association) to form the grid node CL-025-A-PD-003. Through a large number of such cross-mappings, a hierarchical refinement grid covering all levels and elements is constructed, so that each grid node contains both subdivided information within the same level and cross-level association information.

[0081] Subsequently, vertical coding identification and positioning are performed based on the hierarchical refined grid to obtain consistency verification results. Horizontal difference identification is performed based on the vertical identification mark to obtain difference verification results, ensuring that the horizontal and vertical marks are unique, and then determining the refined code and the corresponding hierarchical correspondence. The specific steps are explained in detail in A345-1-A345-2.

[0082] When establishing the mapping relationship between detailed codes and unique attribute identifiers, it is necessary to first sort out all detailed codes and the unique attribute identifiers of their corresponding elements. For example, the unique attribute identifier of protection device PD-003 is PD-003. Its horizontal detailed codes include PD-003-1, the protection device in cabinet No. 1; PD-003-2, the device responsible for line protection. The vertical detailed codes include PD-003-CL-025, connected to cable No. 25; PD-003-SP-042, carrying protection action signal No. 42. By establishing a mapping table, these refined codes are mapped one-to-one with PD-003, such as PD-003-1→PD-003, PD-003-CL-025→PD-003. Similarly, the refined codes of 60 cables, such as CL-025-A and CL-025-SP-042, are mapped to the unique attribute identifier CL-025, and the refined codes of 80 protection action signals, such as SP-042-01 and SP-042-CL-025, are mapped to the unique attribute identifier SP-042, ensuring that each refined code can be traced back to the corresponding unique attribute identifier.

[0083] Based on this, the specific content of the hierarchical coding mapping rules is determined. Attribute identifiers directly adopt the unique attribute identifier of the element, such as PD-003 for protection devices and CL-025 for cables. This identifier can directly locate the specific element. Hierarchical identifiers are set according to the model hierarchy in which the element belongs. Elements in the signal transmission model hierarchy are prefixed with SG, such as SG-SP-042; elements in the physical structure model hierarchy are prefixed with PH, such as PH-PD-003 and PH-CL-025; elements in the three-dimensional equipment space model hierarchy are prefixed with 3D, such as 3D-PD-003. Hierarchical identifiers can quickly distinguish the hierarchy to which an element belongs. Inter-hierarchical identifiers integrate attribute identifiers from different levels. For example, the association identifier between the protection action signal SP-042 and the cable CL-025 is SG-SP042-PH-CL025, and the association identifier between the cable CL-025 and the protection device PD-003 is PH-CL025-3D-PD003. Inter-hierarchical identifiers can directly locate cross-hierarchical relationships.

[0084] To ensure the validity of the rules, the identification of 100 sets of elements needs to be verified. For example, the attribute identifier PD-003 can accurately extract all the detailed codes and associated information of the protection device; the hierarchy identifier PH-CL can filter out all cable elements at the physical structure level; and the inter-hierarchy identifier SG-SP042-PH-CL025 can directly obtain the connection relationship between the No. 42 protection action signal and the No. 25 cable. The verification pass rate needs to reach more than 95% to confirm the accuracy and stability of the rules.

[0085] By refining the mapping relationship between codes and unique attribute identifiers, clarifying and verifying the rules for attribute identifiers, hierarchical identifiers, and inter-hierarchical identifiers, the goal of establishing hierarchical coding mapping rules that enable multi-dimensional and multi-level identifier positioning was achieved, providing a unified standard for information association in multi-level model architectures.

[0086] Furthermore, step A346 in the method provided in this application embodiment includes:

[0087] A346-1: The hierarchical encoding mapping rules include: attribute identifier, hierarchical identifier, and inter-hierarchical identifier, which are used for multi-dimensional and multi-level identifier positioning.

[0088] In one embodiment, attribute identifiers form the basis of hierarchical coding mapping rules, used to assign a unique identity to each element in the substation secondary system. In practical applications, all secondary equipment, connection paths, and signal transmission paths need to be coded individually. For example, unique codes PD-001 to PD-012 are assigned to 12 protection devices, codes CL-001 to CL-060 are assigned to 60 cables, and codes SP-001 to SP-080 are assigned to 80 protection action signal paths. These codes must contain the core attribute information of the elements. For instance, in PD-003, PD represents a protection device, and 003 represents the serial number of that type of device. Attribute identifiers allow direct location of specific elements, ensuring that each element in the model can be uniquely identified and avoiding confusion.

[0089] Hierarchical identifiers are used to clearly identify the model level to which an element belongs, enabling precise differentiation between different levels. Different hierarchical identifier rules need to be established for the three model levels: signal transmission, physical structure, and 3D equipment space. Elements in the signal transmission model level are prefixed with SG, such as SG-SP-042 for protection action signal number 42; elements in the physical structure model level are prefixed with PH, such as PH-CL-025 for cable number 25; and elements in the 3D equipment space model level are prefixed with 3D, such as 3D-PD-003 for the 3D model of protection device number 3. Using these rules, when processing model data, the hierarchical identifier prefix alone allows for quick determination of the element's level. For example, SG-SP-042 directly indicates that the element belongs to the signal transmission level, improving hierarchical identification efficiency.

[0090] Inter-level identifiers are used to establish relationships between elements at different levels, enabling cross-level information mapping. Their coding rules must integrate the attribute identifiers and level identifiers of the associated elements. For example, when SP-042 (protection action signal) at the signal transmission level is associated with CL-025 (cable) at the physical structure level, the inter-level identifier is SG-SP042-PH-CL025; when this cable is associated with PD-003 (protection device) at the three-dimensional equipment space level, the inter-level identifier is PH-CL025-3D-PD003. Through this identifier, the physical connection and spatial location corresponding to the signal transmission path can be directly traced. For example, SG-SP042-PH-CL025 can quickly locate the cable carrying protection action signal number 42, and PH-CL025-3D-PD003 can locate the three-dimensional coordinates of the protection device connected to that cable. All cross-level association groups in a substation can be efficiently traced through inter-level identifiers.

[0091] By clarifying the uniqueness of attribute identifiers, the hierarchical differentiation function of hierarchical identifiers, and the cross-level association of identifiers between levels, the effect of multi-dimensional and multi-level identifier positioning is achieved, providing a unified rule for the accurate identification and cross-level association of each element in the substation secondary system model.

[0092] Furthermore, step A345 in the method provided in this application embodiment includes:

[0093] A345-1: Based on the aforementioned hierarchical refined grid, perform vertical coding recognition and positioning to determine multi-level coherent recognition of the coding and obtain consistency verification results.

[0094] A345-2: Perform lateral difference identification based on each vertical identification mark to obtain difference verification results and ensure that the lateral and vertical marks are unique.

[0095] Optionally, when performing vertical coding identification and positioning based on a hierarchical refined grid, a vertically associated coding sequence is selected from the grid, and the continuity of the coding is verified layer by layer. For example, selecting the coding sequence SP-042-01-CL-025-A-PD-003, first identifying SP-042-01 at the signal transmission model level as a line protection action signal, then locating CL-025-A at the physical structure model level as cable number 25 in area A, confirming that the association between this cable and SP-042-01 conforms to preset rules, then tracing back to PD-003 at the three-dimensional equipment space model level as protection device number 3, checking whether cable CL-025-A is indeed connected to the designated interface of PD-003. One by one, 100 similar vertical coding sequences in the grid are verified. If more than 98 sequences can achieve continuous identification from the signal transmission level to the physical structure level and then to the three-dimensional space level, and the coding association at each level is unbroken, then the consistency verification can be determined to be passed, and the consistency verification result is obtained.

[0096] Next, horizontal differences are identified based on each vertical identifier, comparing the horizontal refinement codes corresponding to different vertical identifiers within the same model level. Taking the signal transmission model level as an example, for the vertical identifiers SP-042-01-CL-025-A-PD-003 and SP-043-01-CL-026-A-PD-004, the horizontal codes SP-042-01 and SP-043-01 are extracted, and the duplication is checked. At the physical structure model level, CL-025-A and CL-026-A are extracted, confirming that there are no duplicate cable codes within the same area. All groups of horizontal codes in the level are checked. If all codes are unique within the same level and different elements can be clearly distinguished by coding features, the difference verification is considered successful, and the difference verification result is obtained.

[0097] By verifying consistency through vertical coding coherence and verifying differences through horizontal coding uniqueness, the effect of ensuring that the refined coding is coherent in the vertical hierarchy and unique in the horizontal hierarchy is achieved, providing a reliable basis for determining the final refined coding and the corresponding hierarchical correspondence.

[0098] Furthermore, step A346-1 in the method provided in this application embodiment includes:

[0099] A346-1A: Using attribute identifiers, extract the substation connection relationship diagram corresponding to the attributes from the substation secondary system model.

[0100] A346-1B: The hierarchical substation connection relationship is obtained by extracting the hierarchical identifier from the substation secondary system model.

[0101] A346-1C: Using the inter-level identifiers, extract the corresponding cross-domain hierarchical connection relationships from the substation secondary system model.

[0102] A346-1D: The connection relationship includes physical connection and signal connection.

[0103] In one embodiment, firstly, the connection relationship diagram corresponding to the corresponding attributes is extracted from the substation secondary system model using attribute identifiers, and a query is initiated based on the unique attribute identifier of each element. For example, for a protection device with attribute identifier PD-003, by inputting this identifier through the model's search function, the system will automatically filter out all connection relationships related to this protection device, including its physical connection with cable CL-025 (No. 25) and the signal connection of the protection action signal SP-042 (No. 42) it carries. Finally, a connection relationship diagram centered on PD-003 is generated, clearly presenting all its associated elements and connection types. For the 12 sets of protection devices, a similar exclusive connection relationship diagram can be extracted for each set using its attribute identifier. Furthermore, during the extraction process, the connection relationships of different types of elements can be quickly filtered using the classification prefix of the attribute identifier, such as PD, CL, SP, etc., improving extraction efficiency.

[0104] Then, when extracting the substation connection relationships by level using the level identifier, the target level needs to be located based on the prefix of the level identifier. For example, if the level identifier prefix SG is input as the signal transmission model level, the system will traverse all elements in the model with that prefix and extract all connection relationships within the signal transmission level, including the transmission paths of 80 protection action signals and 50 measurement and control signals, as well as their logical relationships. If the level identifier PH is input as the physical structure model level, the physical connection layout of 60 cables and 40 optical fibers, as well as the physical connection relationships between equipment, can be extracted. In this way, the complete connection relationships within a single level can be quickly obtained. In a model containing three levels, the extraction time for the connection relationships of a single level can be controlled within 10 seconds.

[0105] Subsequently, when extracting direct connections across different levels using inter-level identifiers, it is necessary to input inter-level identifiers that integrate identifiers from different levels. For example, inputting the inter-level identifier SG-SP042-PH-CL025 will locate the inter-level connection between protection action signal No. 42 (signal transmission level) and cable No. 25 (physical structure level), clarifying the physical path of signal transmission through this cable; inputting PH-CL025-3D-PD003 will extract the inter-level connection between cable No. 25 (physical structure level) and protection device No. 3 (three-dimensional equipment space level), obtaining the specific connection location of the cable on the protection device, such as the X1 interface, and three-dimensional coordinates (8.3 meters, 5.2 meters, 0.9 meters). All similar inter-level connections in a substation can be accurately extracted using the corresponding inter-level identifiers.

[0106] The aforementioned connection relationships encompass both physical connections and signal connections. Physical connections include the actual laying paths of cables and optical fibers, while signal connections include the transmission logic of protection action signals and measurement and control signals. By extracting these three types of identifiers, all types of connection relationships—single element, single level, and cross-level—can be comprehensively covered.

[0107] By extracting corresponding connection relationships from the model using attribute identifiers, hierarchical identifiers, and inter-hierarchical identifiers respectively, the system achieves accurate and comprehensive acquisition of physical and signal connections in the substation secondary system, providing complete connection relationship data support for system analysis, operation and maintenance, and management.

[0108] In summary, the substation secondary system modeling method based on multidimensional coupling provided in this application has the following technical effects:

[0109] This application constructs a device connection topology by decomposing the secondary equipment of a substation. Based on this structure, it analyzes the electrical signal transmission in conjunction with the substation's operational objectives to obtain a signal transmission topology and establishes its corresponding geometric relationship with the equipment structure. A multi-level model architecture is then built, encompassing signal transmission, physical structure, and three-dimensional equipment space, with each level having coded mapping rules. These hierarchical coded mapping rules are used to match and map the aforementioned topology and geometric relationships, generating codes for each level and fitting the data. This constructs a substation secondary system model, making the modeling of the substation secondary system more accurate and comprehensive. It achieves the coupling and hierarchical coded mapping of multi-dimensional information such as equipment connections, signal transmission, and three-dimensional space in the substation secondary system, effectively associating physical entities with digital models and meeting the technical requirements for precise analysis and control under a cyber-physical system.

[0110] Example 2, as Figure 2 As shown, based on the same inventive concept as in Embodiment 1 above, this application provides a substation secondary system modeling system based on multidimensional coupling, the system comprising:

[0111] The device connection topology construction module 1 is used to decompose the secondary equipment of the substation and construct the device connection topology.

[0112] The signal transmission topology acquisition module 2 analyzes the electrical signal transmission based on the equipment connection topology and the substation's working objectives to obtain the signal transmission topology and establish the corresponding geometric relationship between signal transmission and equipment structure.

[0113] Multi-level model architecture construction module 3 is used to build a multi-level model architecture, including signal transmission, physical structure, and three-dimensional device space. Each model level has a level of encoding mapping rules.

[0114] The secondary system model construction module 4 uses the hierarchical coding mapping rules of the multi-level model architecture to match and map the equipment connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and equipment structure, generate codes at each level, and perform data fitting to construct the substation secondary system model.

[0115] Furthermore, the secondary system model construction module 4 is used to perform the following steps:

[0116] A substation full-cycle node chain is established, with each cycle node having constraint parameters. The multi-level model architecture is embedded into each cycle node in the substation full-cycle node chain, and the constraint parameters are used to select parameters for the multi-level model architecture to obtain a full-cycle hierarchical model structure. Using the constraint parameters and hierarchical coding mapping rules of the full-cycle hierarchical model structure, parameter selection and hierarchical coding mapping rule matching and mapping are performed on the equipment connection topology, signal transmission topology, and the corresponding geometric relationship between signal transmission and equipment structure. Hierarchical codes for each cycle node are generated for data fitting to construct the substation secondary system model.

[0117] Furthermore, the device connection topology construction module 1 is used to perform the following steps:

[0118] Identify all secondary equipment in the substation, including protection devices, measurement and control devices, terminal blocks, cables, optical fibers, circuit breakers, and pressure plates; determine the connection relationships between each secondary device, including cable connections, optical fiber connections, and virtual terminal connections; based on the secondary devices and their connection relationships, construct an equipment connection topology diagram to clarify the physical connection paths and logical connection relationships between each device.

[0119] Furthermore, the signal transmission topology acquisition module 2 is used to perform the following steps:

[0120] Analyze the substation's operational objectives to determine the functional requirements and signal transmission requirements of each secondary device. Based on the device connection topology and the aforementioned functional and signal transmission requirements, analyze the transmission paths of electrical signals between the secondary devices, including protection action signals, measurement and control signals, and communication signals. Establish a signal transmission topology diagram based on these transmission paths, clearly defining the starting point, ending point, and intermediate nodes of the signal transmission. Based on this signal transmission topology, map the signal transmission paths onto the geometric structure of the secondary devices, determining the corresponding geometric relationship between the signal transmission paths and the secondary device structure, including the specific location and direction of the signal transmission paths on the devices.

[0121] Furthermore, the multi-level model architecture building module 3 is used to perform the following steps:

[0122] A signal transmission model hierarchy is constructed to describe the logical relationships and paths of signal transmission; a physical structure model hierarchy is constructed to describe the physical connections and layout of devices; a three-dimensional device space model hierarchy is constructed to describe the three-dimensional geometry and spatial location of devices; the signal transmission model hierarchy, physical structure model hierarchy, and three-dimensional device space model hierarchy are mapped and connected to construct the multi-level model architecture, and hierarchical encoding mapping rules are configured according to the hierarchical relationships of the descriptive features of each level to ensure that the information between different levels can correspond and be associated.

[0123] Furthermore, the multi-level model architecture building module 3 is used to perform the following steps:

[0124] Each device, connection path, and signal transmission path is assigned a unique hierarchical code to ensure that each element has a unique attribute identifier in the model. Horizontal hierarchical refinement coding is performed according to the hierarchical relationships of descriptive features within each level. Vertical hierarchical refinement coding is performed according to the association mapping relationships between each level. The horizontal and vertical hierarchical refinement codes are cross-mapped to construct a hierarchical refinement grid. Consistency and difference verification are performed based on the hierarchical refinement grid to determine the refinement codes and their corresponding hierarchical correspondences. A mapping association is established between the refinement codes and the unique attribute identifiers to determine the hierarchical coding mapping rules.

[0125] Furthermore, the multi-level model architecture building module 3 is used to perform the following steps:

[0126] The hierarchical encoding mapping rules include: attribute identifiers, hierarchical identifiers, and inter-hierarchical identifiers, which are used for multi-dimensional and multi-level identifier positioning.

[0127] Furthermore, the multi-level model architecture building module 3 is used to perform the following steps:

[0128] Based on the hierarchical refined grid, vertical coding identification and positioning are performed to determine the coherent identification of multi-level coding and obtain consistency verification results; horizontal difference identification is performed based on each vertical identification mark to obtain difference verification results, ensuring that the horizontal and vertical marks are unique.

[0129] Furthermore, the multi-level model architecture building module 3 is used to perform the following steps:

[0130] The substation connection relationship diagram with corresponding attributes is obtained by extracting the attribute identifier from the substation secondary system model; the hierarchical substation connection relationship is obtained by extracting the hierarchical identifier from the substation secondary system model; the cross-domain hierarchical connection relationship is obtained by extracting the inter-hierarchical identifier from the substation secondary system model; wherein, the connection relationship includes physical connection and signal connection.

[0131] The substation secondary system modeling system based on multidimensional coupling provided in this embodiment of the invention can execute the substation secondary system modeling method based on multidimensional coupling provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0132] Although this application makes various references to certain modules in the system according to the embodiments of this application, any number of different modules can be used and run on user terminals and / or servers. The various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy distinction between each other and are not used to limit the scope of protection of this invention.

[0133] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application. In some cases, the actions or steps described in this application can be performed in a different order than that shown in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A method for modeling a substation secondary system based on multi-dimensional coupling, characterized in that, The method comprises the following steps: decompose the secondary equipment of a substation, and construct an equipment connection topology structure; based on the equipment connection topology structure, analyze the electrical signal transmission in combination with the working target of the substation, obtain a signal transmission topology structure, and establish the corresponding geometric relationship between the signal transmission and the equipment structure; build a multi-level model architecture, including signal transmission, physical structure, and three-dimensional equipment space, and each model level has a level coding mapping rule; use the level coding mapping rule of the multi-level model architecture to match and map the equipment connection topology structure, the signal transmission topology structure, and the corresponding geometric relationship between the signal transmission and the equipment structure, generate level codes of each level, and perform data fitting to construct a substation secondary system model; wherein, constructing the substation secondary system model further comprises: establishing a substation full-cycle node chain, each cycle node having a constraint parameter; embedding the multi-level model architecture into each cycle node of the substation full-cycle node chain, and using the constraint parameter to select parameters of the multi-level model architecture to obtain a full-cycle level model structure; using the constraint parameter and the level coding mapping rule of the full-cycle level model structure to select parameters and match and map the level coding mapping rule of the equipment connection topology structure, the signal transmission topology structure, and the corresponding geometric relationship between the signal transmission and the equipment structure, generate level codes of each cycle node for data fitting to construct the substation secondary system model; wherein, building the multi-level model architecture comprises: building a signal transmission model level to describe the logical relationship and path of signal transmission; building a physical structure model level to describe the physical connection and layout of the equipment; building a three-dimensional equipment space model level to describe the three-dimensional geometric shape and spatial position of the equipment; mapping and connecting the signal transmission model level, the physical structure model level, and the three-dimensional equipment space model level to construct the multi-level model architecture, and configuring the level coding mapping rule according to the description characteristics and level relationship of each level to ensure that the information between different levels can be corresponded and associated.

2. The multi-dimensional coupling based substation secondary system modeling method of claim 1, wherein, decompose the secondary equipment of a substation, and construct an equipment connection topology structure, comprising: identify all secondary equipment in the substation, including protection devices, measurement and control devices, terminal blocks, cables, optical fibers, air switches, and pressure plates; determine the connection relationship between each secondary equipment, including cable connection, optical fiber connection, and virtual terminal connection; based on the secondary equipment and its connection relationship, construct an equipment connection topology structure diagram to clearly show the physical connection path and logical connection relationship between each equipment.

3. The multi-dimensional coupling based substation secondary system modeling method of claim 2, wherein, based on the equipment connection topology structure, analyze the electrical signal transmission in combination with the working target of the substation to obtain a signal transmission topology structure, and establish the corresponding geometric relationship between the signal transmission and the equipment structure, comprising: analyze the working target of the substation to determine the functional requirements and signal transmission requirements of each secondary equipment; according to the equipment connection topology structure, analyze the transmission path of electrical signals between each secondary equipment in combination with the functional requirements and signal transmission requirements, including protection action signals, measurement and control signals, and communication signals; According to the transmission path of the electrical signal between each secondary device, a signal transmission topology diagram is established to clearly indicate the starting point, end point and intermediate node of signal transmission; Based on the signal transmission topology, the signal transmission path is position-mapped in the geometric structure of the secondary device to determine the corresponding geometric relationship between the signal transmission path and the secondary device structure, including the specific position and direction of the signal transmission path on the device.

4. The multi-dimensional coupling based substation secondary system modeling method of claim 1, wherein, According to the description feature level relationship in each level, a level coding mapping rule is configured, including: A unique level code is assigned to each device, connection path and signal transmission path to ensure that each element has a unique attribute identifier in the model; According to the description feature level relationship in each level, a horizontal level refinement coding is performed; According to the association mapping relationship between levels, a vertical level refinement coding is performed; The horizontal level refinement coding and the vertical level refinement coding are cross-mapped to construct a level refinement grid; According to the level refinement grid, consistency and difference verification is performed to determine the refinement coding and the corresponding level correspondence; The refinement coding and the unique attribute identifier are mapped and associated to determine the level coding mapping rule.

5. The multi-dimensional coupling based substation secondary system modeling method of claim 4, wherein, The level coding mapping rule includes attribute identifier, level identifier and inter-level identifier for multi-dimensional and multi-level identification positioning.

6. The multi-dimensional coupling based substation secondary system modeling method of claim 4, wherein, According to the level refinement grid, consistency and difference verification is performed to determine the refinement coding and the corresponding level correspondence, including: Based on the level refinement grid, a vertical coding identification positioning is performed to determine the coding multi-level coherent identification and obtain a consistency verification result; According to each vertical identification, a horizontal difference identification is performed to obtain a difference verification result, ensuring that the horizontal and vertical identifications are unique.

7. The multi-dimensional coupling based substation secondary system modeling method of claim 5, wherein, It also includes: Using the attribute identifier to extract from the substation secondary system model to obtain the corresponding attribute of the substation connection relationship diagram; Using the level identifier to extract from the substation secondary system model to obtain the level of the substation connection relationship; Using the inter-level identifier to extract from the substation secondary system model to obtain the connection relationship of the corresponding identifier cross-domain level; Wherein, the connection relationship includes physical connection and signal connection.

8. A substation secondary system modeling system based on multi-dimensional coupling, characterized by, The system for implementing the multi-dimensional coupling-based substation secondary system modeling method of any one of claims 1-7, the system comprising: A device connection topology structure construction module for decomposing the secondary devices of the substation to construct a device connection topology structure; A signal transmission topology structure acquisition module for analyzing the electrical signal transmission based on the device connection topology structure and the working target of the substation to obtain a signal transmission topology structure and establish the corresponding geometric relationship between the signal transmission and the device structure; A multi-level model architecture construction module for building a multi-level model architecture, including signal transmission, physical structure and three-dimensional device space, each model level having a level coding mapping rule; A secondary system model construction module for matching and mapping the device connection topology structure, the signal transmission topology structure and the corresponding geometric relationship between the signal transmission and the device structure using the level coding mapping rule of the multi-level model architecture to generate each level code and perform data fitting to construct a substation secondary system model.

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