A substation digital twinning method and terminal

Abstract

The application discloses a substation digital twinning method and a terminal, establishes a logical model of a substation, establishes a physical model of the substation, converts the physical model by using an SCL description language, obtains a converted physical model, associates the logical model with the converted physical model, obtains a digital twinning substation, and associates the logical model and the physical model by using an SCL description language configuration method, so that the substation digital twinning is effectively and conveniently realized in a more efficient and accurate manner.

Description

Technical Field

[0001] This invention relates to the field of substation technology, and in particular to a substation digital twin method and terminal. Background Technology

[0002] Digital twin technology can support the design, construction, and operation management of intelligent manufacturing systems. Similar to product lifecycles, manufacturing systems also have their own lifecycles. In substations, realizing digital twin applications requires merging and digitally associating the substation's logical model with its physical model to achieve a twinning of three-dimensional physical and digital information.

[0003] Therefore, how to effectively and conveniently realize the digital twin of substations has become one of the issues that need to be considered at present. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and terminal for digital twin of substations, which can effectively and conveniently realize digital twin of substations.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A method for creating a digital twin of a substation, comprising the following steps:

[0007] Establish a logical model of the substation and a physical model of the substation;

[0008] The physical model is transformed using the SCL description language to obtain the transformed physical model;

[0009] By associating the logical model with the transformed physical model, a digital twin substation is obtained.

[0010] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0011] A digital twin terminal for a substation includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the following steps:

[0012] Establish a logical model of the substation and a physical model of the substation;

[0013] The physical model is transformed using the SCL description language to obtain the transformed physical model;

[0014] By associating the logical model with the transformed physical model, a digital twin substation is obtained.

[0015] The beneficial effects of this invention are as follows: a logical model of the substation is established, and a physical model of the substation is established. The physical model is transformed using the SCL description language to obtain the transformed physical model. The logical model is associated with the transformed physical model to obtain a digital twin substation. The SCL description language configuration method is used to associate the logical model and the physical model, which is more efficient and accurate, thereby effectively and conveniently realizing the digital twin of the substation. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the steps of a substation digital twin method according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of a substation digital twin terminal according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of a cable tray model in the substation digital twin method according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of a cable trench model in the substation digital twin method of this invention.

[0020] Figure 5 This is a schematic diagram of the electrical equipment cable conduit model in the substation digital twin method of this invention.

[0021] Figure 6 This is a schematic diagram of the physical topology of the direct sampling and direct tripping method in the substation digital twin method of this invention.

[0022] Figure 7 This is a schematic diagram of the physical topology of the substation digital twin method according to an embodiment of the present invention, using the optical cable distribution frame switching method.

[0023] Figure 8 This is a schematic diagram of the physical topology of the substation digital twin method according to an embodiment of the present invention, using a switch-based transfer method.

[0024] Figure 9 This is a schematic diagram of the backplane of the PCS931 smart substation intelligent device in the substation digital twin method of this invention.

[0025] Figure 10 This is a schematic diagram of a standard 48-port fiber optic distribution frame in the substation digital twin method of this invention. Detailed Implementation

[0026] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] Please refer to Figure 1 A method for creating a digital twin of a substation, comprising the following steps:

[0028] Establish a logical model of the substation and a physical model of the substation;

[0029] The physical model is transformed using the SCL description language to obtain the transformed physical model;

[0030] By associating the logical model with the transformed physical model, a digital twin substation is obtained.

[0031] As can be seen from the above description, the beneficial effects of the present invention are as follows: a logical model of the substation is established, and a physical model of the substation is established. The physical model is transformed using the SCL description language to obtain the transformed physical model. The logical model is associated with the transformed physical model to obtain a digital twin substation. The SCL description language configuration method is used to associate the logical model and the physical model, which is more efficient and accurate, thereby effectively and conveniently realizing the digital twin of the substation.

[0032] Furthermore, the logical model for establishing the substation includes:

[0033] Construct physical models of substation cabinets and individual devices;

[0034] A physical loop model is generated based on the physical model of the cabinet and the physical model of the single device.

[0035] Construct the primary topology model and single-device capacity description model of the substation;

[0036] A logic loop model is generated based on the primary topology model and the single device capability description model.

[0037] A logical model is generated based on the physical loop model and the logical loop model.

[0038] As described above, the logical model consists of a physical loop model and a logical loop model. The physical loop model consists of a cabinet physical model and a single device physical model, while the logical loop model consists of a primary topology model and a single device capability description model. This can better reflect the relationships, functional relationships, and hierarchical relationships between devices.

[0039] Furthermore, the physical model of the substation cabinet and the physical model of each individual device include:

[0040] Determine the layout information of each panel cabinet in the substation, the layout information including the position and arrangement information of each panel cabinet component;

[0041] Each cabinet is modeled based on the position and arrangement information of each cabinet component, and the operation interface of each cabinet is modeled to obtain the physical model of the cabinet.

[0042] Determine the physical characteristics, specific functions, and performance parameters of each device in the substation;

[0043] Each device is modeled based on its physical characteristics, specific functions, and performance parameters to obtain a single-device physical model.

[0044] As described above, each cabinet is modeled based on the location and arrangement information of each cabinet component, and the operation interface of each cabinet is also modeled. This ensures that the physical model of the cabinet is consistent with the actual operation and maintenance process of the cabinet. Modeling each device based on its physical characteristics, specific functions and performance parameters can better simulate the role and operation mode of the device in the substation, so as to realize a more reliable substation digital twin application.

[0045] Furthermore, the step of generating a physical loop model based on the cabinet physical model and the single device physical model includes:

[0046] Identify all physical components in the substation and the connection methods between the physical components;

[0047] The physical characteristics of the physical components are modeled, and the electrical connections between the physical components are constructed according to the connection methods between the physical components to obtain an initial physical loop model;

[0048] A physical loop model is generated based on the initial physical loop model, the cabinet physical model, and the single device physical model.

[0049] As described above, generating a physical loop model based on the initial physical loop model, the cabinet physical model, and the single device physical model ensures that the physical loop model reflects the actual electrical path and flow.

[0050] Furthermore, the construction of the primary topology model and single-device capacity description model of the substation includes:

[0051] The primary electrical network structure of the substation, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions are determined.

[0052] A primary topology model is obtained by modeling the primary electrical network structure, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions.

[0053] Determine the capacity parameters of each device in the substation, its performance limitations under different conditions, and its performance variations under different environmental conditions;

[0054] A single-device capability description model is obtained by modeling the capability parameters of each device, the performance limitations under different conditions, and the performance changes under different environmental conditions.

[0055] As described above, by modeling the primary electrical network structure, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions, and by modeling the capacity parameters of each device, the performance limitations under different conditions, and the performance changes under different environmental conditions, a primary topology model and a single device capacity description model are obtained respectively, which can accurately represent the logic loop of the substation.

[0056] Furthermore, establishing the physical model of the substation includes:

[0057] Collect detailed data from the substation;

[0058] Determine the model's architecture and detailed specifications;

[0059] Based on the detailed data, architecture, and specifications, each component in the substation is modeled, and the physical characteristics and functions of each component are simulated to obtain a preliminary physical model.

[0060] The accuracy of the preliminary physical model was verified using actual operational data, and the verification results were obtained.

[0061] The preliminary physical model is optimized based on the verification results to obtain the physical model of the substation.

[0062] As described above, the accuracy of the preliminary physical model is verified using actual operating data to ensure that the model can reflect real physical behavior. Based on the verification results, the preliminary physical model is optimized, which improves the accuracy of the physical model and enables better implementation of digital twin applications for substations.

[0063] Furthermore, the transformation of the physical model using the SCL description language to obtain the transformed physical model includes:

[0064] Establish the physical loop topology of the physical model;

[0065] Determine the structure and properties of the SCL description language;

[0066] The physical loop topology is transformed according to the SCL description language structure and attributes to obtain the transformed physical model.

[0067] As described above, the physical circuit topology can be converted based on the structure and attributes of the SCL description language. Since the logical model is configured in a similar way to the SCL description language, the conversion of the physical model using the SCL description language can more simply and efficiently realize the association between the physical model and the logical model.

[0068] Furthermore, the physical loop topology for establishing the physical model includes:

[0069] Determine the optical fiber link connection method of the physical model;

[0070] The physical loop topology of the physical model is established based on the optical cable link connection method.

[0071] Furthermore, the optical cable link connection methods include direct acquisition and direct jump, optical cable distribution frame conversion, and switch conversion.

[0072] As described above, the physical circuit topology of the physical model is established based on the optical cable link connection method. Through the physical circuit topology, the physical model and the logical model can be accurately associated, realizing the digital twin of the substation.

[0073] Please refer to Figure 2 Another embodiment of the present invention provides a substation digital twin terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the various steps in the above-described substation digital twin method.

[0074] The substation digital twin method and terminal described above are applicable to scenarios requiring the implementation of substation digital twins. The following detailed embodiments illustrate these methods:

[0075] Please refer to Figure 1 , Figures 3-10 Embodiment 1 of the present invention is as follows:

[0076] A method for creating a digital twin of a substation, comprising the following steps:

[0077] S1. Establish the logical model of the substation and the physical model of the substation, specifically including S11-S110:

[0078] S11. Construct the physical model of the substation cabinets and the physical model of individual devices, specifically including S111-S114:

[0079] S111. Determine the layout information of each panel cabinet in the substation, wherein the layout information includes the position and arrangement information of each panel cabinet component.

[0080] In one alternative implementation, the cabinet assembly includes switches, controllers, and protection devices.

[0081] S112. Model each cabinet according to the position and arrangement information of each cabinet component, and model the operation interface of each cabinet to obtain the physical model of the cabinet.

[0082] S113. Determine the physical characteristics, specific functions, and performance parameters of each device in the substation.

[0083] In one alternative implementation, the physical characteristics include size, weight, material, and manufacturing parameters; the specific functions include the role and operation mode of the device in the substation; and the performance parameters include rated voltage, current capacity, and fault response characteristics.

[0084] S114. Model each device according to the physical characteristics, specific functions and performance parameters to obtain a single device physical model.

[0085] The physical model of the cabinet and the physical model of the single device are used to generate the physical loop model.

[0086] S12. Generate a physical loop model based on the physical model of the cabinet and the physical model of the single device, specifically including S121-S123:

[0087] S121. Identify all physical components in the substation and the connection methods between the physical components;

[0088] In one alternative implementation, all the physical components include transformers, circuit breakers, relays, etc.

[0089] S122. Model the physical characteristics of the physical components and construct the electrical connections between the physical components according to the connection method between the physical components to obtain an initial physical circuit model;

[0090] In one alternative implementation, the physical characteristics include electrical parameters, operating range, and performance indicators.

[0091] S123. Generate a physical loop model based on the initial physical loop model, the cabinet physical model, and the single device physical model. This ensures that the physical loop model reflects the actual electrical paths and flows.

[0092] S13. Construct the primary topology model and single-device capability description model of the substation, specifically including S131-S134:

[0093] S131. Determine the primary electrical network structure of the substation, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions.

[0094] In one alternative implementation, the primary electrical network structure includes all buses, feeders, and connection points; the electrical parameters include impedance, capacity, and load.

[0095] S132. A primary topology model is obtained by modeling the primary electrical network structure, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions.

[0096] S133. Determine the capability parameters of each device in the substation, its performance limitations under different conditions, and its performance changes under different environmental conditions;

[0097] In one alternative implementation, the capability parameters include maximum current handling capacity, frequency response range, and fault handling capability; the environmental conditions include temperature and humidity.

[0098] S134. A single device capability description model is obtained by modeling based on the capability parameters of each device, the performance limitations under different conditions, and the performance changes under different environmental conditions.

[0099] S14. Generate a logic loop model based on the primary topology model and the single device capability description model;

[0100] Specifically, the logic loops in the substation are determined, and the operation logic and faults of the substation are simulated. Based on the primary topology model and the single device capability description model, a logic loop model is generated based on the logic loops and the simulated operation logic and faults.

[0101] In one alternative implementation, the logic loop includes signal flow and control flow; the operational logic includes protection logic, circuit breaker control, and isolation logic.

[0102] S15. Generate a logical model based on the physical loop model and the logical loop model.

[0103] S16. Collect detailed data of the substation.

[0104] In one alternative implementation, the detailed data includes technical specifications, layout diagrams, equipment lists, etc.

[0105] S17. Determine the model's architecture and detailed specifications;

[0106] In one alternative implementation, the detailed specifications include accuracy, resolution, and required input data.

[0107] S18. Based on the detailed data, the architecture, and the detailed specifications, model each component in the substation, and simulate the physical characteristics and functions of each component to obtain a preliminary physical model.

[0108] In one alternative implementation, the components include transformers, circuit breakers, relays, cables, and busbars, etc.

[0109] S19. Verify the accuracy of the preliminary physical model using actual operating data to obtain the verification results.

[0110] S110. Based on the verification results, the preliminary physical model is optimized to obtain the physical model of the substation. This improves the accuracy of the model and takes into account the impact of any possible environmental changes or operating conditions on the model.

[0111] In a substation, the main components requiring modeling include transformers, circuit breakers, switches, relay protection devices, busbars, connecting lines, cables, transmission lines, auxiliary equipment, and control and monitoring systems. Transformers include their electrical characteristics, thermal behavior, and load response; circuit breakers and switches include simulations of their switching behavior, arc extinction processes, and fault responses; relay protection devices include their logic control, fault detection, and signal processing; busbars and connecting lines include their electrical characteristics, thermal behavior, and load-bearing capacity; cables and transmission lines include their resistance, inductance, capacitance, and thermal characteristics; auxiliary equipment includes capacitors, filters, and grounding devices; and the control and monitoring system includes communication networks and data acquisition and processing systems.

[0112] Taking the physical model of cable laying as an example, the models involved in the cable laying process include cable tray models, cable trench models, etc., such as the cable tray model... Figure 3 As shown, the cable tray model is designed based on the actual engineering situation, including the selection of cable tray type, cable tray size, and cable distribution principles. The cable tray layout is drawn according to the cable tray routing provided by the civil engineering professionals to ensure that the cable tray model design is consistent with the actual project.

[0113] The cable trench model is designed based on the actual engineering conditions, including setting information such as cable trench dimensions, construction site, support type, support spacing, cable distribution rules, and cable trench corner radii. The final cable trench model is as follows. Figure 4 As shown, designers can set the trench material, grounding material, and detailed civil engineering parameters as needed. Similar to the drawing of cable trays, the cable trench is drawn based on its actual route, ensuring that the cable trench model design is consistent with the actual project.

[0114] The determination of cable trenches and cable trays establishes the channel for cable laying. By specifying the starting and ending equipment (secondary cabinets, outdoor terminal boxes, or mechanism boxes attached to primary electrical equipment) and determining the associated cable trench or cable tray locations, the buried cable routing from the equipment to the cable trench or cable tray is achieved. An example of a buried cable conduit model for electrical equipment is shown below. Figure 5 As shown.

[0115] S2. Use the SCL description language to transform the physical model to obtain the transformed physical model, specifically including S21-S23:

[0116] S21. Establish the physical loop topology of the physical model, specifically including S211-S212:

[0117] S211. Determine the optical fiber link connection method of the physical model.

[0118] The optical cable link connection methods include direct acquisition and direct jump, optical cable distribution frame conversion, and switch conversion.

[0119] The direct acquisition and direct jump method is the most direct connection method for optical fiber links. In this configuration, the optical fiber is directly connected from one device to another without any other devices or repeaters in between. This configuration is usually used when the physical distance is short and the link signal can be transmitted directly.

[0120] The optical distribution frame (ODF) switching method is typically used in more complex network environments where optical cables need to be managed and distributed. The ODF plays a physical-level role in optical signal management and switching. Through the ODF, optical cables can be switched, distributed, and managed, making the connection of optical cable links more flexible.

[0121] The aforementioned switching method implements fiber optic link switching at the network layer. The fiber optic cable is first connected to the switch, and then the switch routes the signal to other devices or networks. This method has high flexibility and scalability, and can realize complex network topologies and wide-area network coverage. The switch can dynamically adjust the routing according to network traffic to improve network efficiency.

[0122] S212. Establish the physical loop topology of the physical model based on the optical cable link connection method. For example, the physical loop topology between intelligent devices (IEDs) in a smart substation can be represented as follows:

[0123] (1) Direct procurement and direct jump method: such as Figure 6 As shown, the physical topology of the IEDs can be displayed by parsing the inputs of both sides.

[0124] (2) Optical distribution frame switching mode: When optical fibers are switched via ODF, as shown in Figure 7 , by parsing the Inputs of four devices including the ODF, the physical topology relationship between the four apparatuses can be displayed.

[0125] (3) Switch switching mode: When a networking mode is adopted, as shown in Figure 8 , by parsing the Inputs of three devices including the switch, the physical topology relationship between the three apparatuses can be displayed.

[0126] S22. Determine the structure and attributes of the SCL description language, as shown in Table 1.

[0127] Table 1 Structure and attributes of SCL description language

[0128]

[0129]

[0130] S23. Convert the physical loop topology structure according to the structure and attributes of the SCL description language to obtain a converted physical model.

[0131] For example, taking the intelligent device of an intelligent substation as an example, the intelligent device of the intelligent substation undertakes the work of substation protection, control, measurement, monitoring, communication and data transmission. When performing physical modeling of the optical fiber link of the intelligent device of the intelligent substation, detailed information including device information, board card information and ports shall be considered. The optical link connection is mainly on the backplane of the device, involving MMS network port connection, 485 time synchronization port connection and GOOSE / SV optical port connection. Selecting an intelligent device from a certain manufacturer as a model example, the backplane terminals of its digital PCS931 device are as shown in Figure 9 ; according to Figure 9 for analysis, the board cards connected to the optical fiber link are board card 1 and board card 7 (from top to bottom); wherein board card 1 is provided with 4 MMS network ports, a 485 differential time synchronization port and a printing port, board card 7 is a GOOSE / SV optical port with an LC interface type, and a printing port is arranged at the bottom. According to the board card information and port information described above, the model language description of the PCS931 based on the IEC61850 SCL configuration language is proposed, and part of the code is as follows:

[0132] <Unit desc="Line protection measurement and control"iedName="PL1101"name="1n"type="IED"> / / Line protection measurement and control device;

[0133] <Board desc="NR1136"slot="7"> / / Board card model and slot number of line protection device;

[0134] <Port desc="GOOSE / SV"direction="Tx"no="A"plug="LC"type="FOC" / > / / Communication port on the board of the line protection device, including attributes such as port description, transmission direction, and optical port type;

[0135] <Port desc="GOOSE / SV"direction="Rx"no="A"plug="LC"type="FOC" / > / / Same as above;

[0136] <Port desc="GOOSE / SV"direction="Tx"no="B"plug="LC"type="FOC" / > / / Same as above;

[0137] <Port desc="GOOSE / SV"direction="Rx"no="B"plug="LC"type="FOC" / > / / Same as above;

[0138] In the above code, taking the 110kV line protection, measurement and control integrated intelligent device as an example, the involved elements are Unit, Board and Port. It can be seen that the model described by the SCL description language has covered all information, including the board model and slot number, optical port category and type, and port category.

[0139] Taking the optical fiber distribution frame model as an example, in the optical fiber link connection of electrical equipment, the optical fiber distribution frame is an indispensable transfer device, whose main function is to provide connections between optical fibers. On the optical fiber distribution frame, connections between optical fibers can be realized by inserting optical fiber jumpers.

[0140] As Figure 10 shown, Figure 10 it is a 48-port optical fiber distribution frame. In the connection of optical cables or optical fibers, the main data that should be included is the terminal information and optical port type in the distribution frame, and part of the code is as follows:

[0141] <Unit desc="Optical Fiber Distribution Frame"iedName=""name="2n"type="ODF"> / / Distribution frame;

[0142] <Board desc=""slot="A"> / / Distribution frame port partition;

[0143] <Port desc=""direction="TxRx"no="01"plug="ST"type="FOC" / > / / Optical distribution frame port, including attributes such as port description, transmission direction, and optical port type;

[0144] <Port desc=""direction="TxRx"no="02"plug="ST"type="FOC" / > / / Same as above;

[0145] <Port desc=""direction="TxRx"no="03"plug="ST"type="FOC" / > / / Same as above;

[0146] <Port desc=""direction="TxRx"no="04"plug="ST"type="FOC" / > / / Same as above;

[0147] Taking the switch model as an example, the switch functions for data communication in electrical connections, and its main function is to implement the switching of data packets in the network, forwarding data packets from one port to the target port. In this way, the switch can connect devices in the network to realize the function of mutual communication. The information covered by the physical model of the switch mainly includes information such as the switch category, gateway and ports, and part of the code is as follows:

[0148] <Unit desc="Line Switch"iedName=""name="3n"type="NET"> / / GOOSE and SV switch;

[0149] <Board desc=""slot="A"> / / Switch board and slot number;

[0150] <Port desc=""direction="Tx"no="01"plug="ST"type="FOC" / > / / Switch optical port, including attributes such as port description, transmission direction, and optical port type;

[0151] <Port desc=""direction="Rx"no="01"plug="ST"type="FOC" / > / / Same as above;

[0152] <Port desc=""direction="Tx"no="02"plug="ST"type="FOC" / > / / Same as above;

[0153] <Port desc=""direction="Rx"no="02"plug="ST"type="FOC" / > / / Same as above;

[0154] S3. Associate the logical model with the transformed physical model to obtain a digital twin substation.

[0155] Specifically, the signal consistency and structural consistency of the logic model are verified respectively, and the verified logic model is associated with the transformed physical model to obtain a digital twin substation.

[0156] Please refer to Figure 2 Embodiment two of the present invention is as follows:

[0157] A substation digital twin terminal includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the various steps of the substation digital twin method in Embodiment 1.

[0158] In summary, the present invention provides a substation digital twin method and terminal, which establishes a logical model and a physical model of the substation. The physical model is transformed using the SCL description language to obtain a transformed physical model. The logical model is then associated with the transformed physical model to obtain a digital twin substation. The SCL description language configuration method for associating the logical and physical models is more efficient and accurate, thus effectively and conveniently realizing substation digital twins. Furthermore, the logical model consists of a physical loop model and a logical loop model. The physical loop model consists of a cabinet physical model and a single device physical model. The logical loop model consists of a primary topology model and a single device capability description model. This better reflects the relationships, functions, and hierarchical relationships between equipment. Moreover, the accuracy of the preliminary physical model is verified using actual operating data to ensure that the model reflects real physical behavior. Based on the verification results, the preliminary physical model is optimized, improving its accuracy and enabling better implementation of substation digital twin applications.

[0159] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for creating a digital twin of a substation, characterized in that, Including the following steps: Establish a logical model of the substation and a physical model of the substation; The physical model is transformed using the SCL description language to obtain the transformed physical model; By associating the logical model with the transformed physical model, a digital twin substation is obtained; The establishment of the physical model of the substation includes: Collect detailed data from the substation; Determine the model's architecture and detailed specifications; Based on the detailed data, architecture, and specifications, each component in the substation is modeled, and the physical characteristics and functions of each component are simulated to obtain a preliminary physical model. The accuracy of the preliminary physical model was verified using actual operational data, and the verification results were obtained. The preliminary physical model is optimized based on the verification results to obtain the physical model of the substation; The transformation of the physical model using the SCL description language to obtain the transformed physical model includes: Establish the physical loop topology of the physical model; Determine the structure and properties of the SCL description language; The physical loop topology is transformed according to the SCL description language structure and attributes to obtain the transformed physical model.

2. The substation digital twin method according to claim 1, characterized in that, The logical model for establishing the substation includes: Construct physical models of substation cabinets and individual devices; A physical loop model is generated based on the physical model of the cabinet and the physical model of the single device. Construct the primary topology model and single-device capacity description model of the substation; A logic loop model is generated based on the primary topology model and the single device capability description model. A logical model is generated based on the physical loop model and the logical loop model.

3. The substation digital twin method according to claim 2, characterized in that, The physical models of the substation cabinets and individual devices include: Determine the layout information of each panel cabinet in the substation, the layout information including the position and arrangement information of each panel cabinet component; Each cabinet is modeled based on the position and arrangement information of each cabinet component, and the operation interface of each cabinet is modeled to obtain the physical model of the cabinet. Determine the physical characteristics, specific functions, and performance parameters of each device in the substation; Each device is modeled based on its physical characteristics, specific functions, and performance parameters to obtain a single-device physical model.

4. The substation digital twin method according to claim 2, characterized in that, The step of generating a physical loop model based on the cabinet physical model and the single device physical model includes: Identify all physical components in the substation and the connection methods between the physical components; The physical characteristics of the physical components are modeled, and the electrical connections between the physical components are constructed according to the connection methods between the physical components to obtain an initial physical loop model; A physical loop model is generated based on the initial physical loop model, the cabinet physical model, and the single device physical model.

5. The substation digital twin method according to claim 2, characterized in that, The construction of the primary topology model and single-unit capacity description model of the substation includes: The primary electrical network structure of the substation, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions are determined. A primary topology model is obtained by modeling the primary electrical network structure, the electrical parameters of each element in the primary electrical network, and the dynamic behavior of the primary electrical network under normal and abnormal conditions. Determine the capacity parameters of each device in the substation, its performance limitations under different conditions, and its performance variations under different environmental conditions; A single-device capability description model is obtained by modeling the capability parameters of each device, the performance limitations under different conditions, and the performance changes under different environmental conditions.

6. The substation digital twin method according to claim 1, characterized in that, The physical loop topology for establishing the physical model includes: Determine the optical fiber link connection method of the physical model; The physical loop topology of the physical model is established based on the optical cable link connection method.

7. A substation digital twin method according to claim 6, characterized in that, The optical cable link connection methods include direct acquisition and direct jump, optical cable distribution frame conversion, and switch conversion.

8. A digital twin terminal for a substation, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements each step of the substation digital twin method according to any one of claims 1 to 7.

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