A Design and Analysis Method for the One-Diagram Model of the Secondary Circuit in an Intelligent Substation

Abstract

The present invention discloses a method for designing and analyzing a one-diagram model of the secondary circuit of an intelligent substation, which relates to the field of intelligent substations. Aiming at the problems of low design level and efficiency in existing intelligent substations, heavy debugging work of the secondary circuit, and low accuracy in the implementation of the substation, the following solutions are proposed, which include the following steps: S1. Study the SSD configuration method of the intelligent substation and the design method of the secondary optoelectronic circuit, summarize the connection rules, draw on the fiber optic physical model method, study the subordinate relationship of optoelectronic components, and establish an optoelectronic component model; S2. Study the physical connection characteristics of the optoelectronic circuit, including the method of internal and external connection relationships of secondary components. Aiming at the differences in the component models of the electrical circuit, combine the internal connection and the external connection of the components to form a complete path. The structure of the present invention is novel, and it can improve the design level and efficiency of the design work, and improve the accuracy and convenience of the substation implementation.

Description

Technical Field

[0001] The present invention relates to the field of intelligent substations, and particularly to a method for designing and analyzing a one-map model of secondary circuits in an intelligent substation. Background Art

[0002] As a key link in building an intelligent power grid, an intelligent substation adopts advanced, integrated, low-carbon, and environmentally friendly intelligent primary equipment, intelligent auxiliary equipment, and networked secondary equipment, featuring digital information, networked communication platforms, and standardized shared information. It not only has basic functions such as automatic information collection, remote measurement, intelligent metering, remote control, automatic protection, and on-line monitoring, but also functions such as automatically monitoring the real-time operation state of the power grid and effectively controlling according to actual needs.

[0003] However, the existing commissioning work of secondary circuits in intelligent substations is heavy. Manual operations are usually adopted in substations, and it takes a lot of time to complete the commissioning of the entire secondary system. In some intelligent power stations, optical fibers are used to replace cables, data is transmitted through networks, and configuration files carry the information of the secondary system. The secondary circuits are not intuitive and have a low degree of visualization. It is impossible to view the physical path of signal transmission and real-time operation data, making it difficult to carry out work such as signal tracing, fault location, and safety measure arrangement. Defect handling overly relies on manufacturers, and the operation safety risk is high. The design work is difficult to carry out and the design efficiency is low. Therefore, in order to solve such problems, we propose a method for designing and analyzing a one-map model of secondary circuits in an intelligent substation. Summary of the Invention

[0004] A method for designing and analyzing a one-map model of secondary circuits in an intelligent substation proposed by the present invention solves the problems of low design level and efficiency in existing intelligent substations, as well as heavy commissioning work of secondary circuits and low accuracy in substation implementation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for designing a one-map model of secondary circuits in an intelligent substation includes the following steps:

[0007] S1. Study the SSD configuration method and secondary optoelectronic circuit design method of intelligent substations, summarize the connection rules, draw on the fiber physical model method, study the subordinate relationship of optoelectronic components, and establish an optoelectronic component model.

[0008] S2. Study the physical connection characteristics of optoelectronic circuits, including the method of internal and external connection relationships of secondary components, and combine the internal and external connections of components to form a complete path in view of the differences in the models of electrical circuit components.

[0009] S3. Study the database storage method, disassemble the component model and connections into the smallest units, store their object attributes in the database, and construct the data structure.

[0010] S4. Study the SSD, SCD, and SPCD file formats and element descriptions, match the virtual circuit connection attributes, optoelectronic circuit connection attributes, and primary component connection attributes in a diagram model with the element attributes of the SSD, SCD, and SPCD files, and store them in the database.

[0011] S5. Combine with the intelligent substation pilot project, conduct model design according to the design method of the one - diagram model of the secondary circuit of the intelligent substation, and submit the model file to the project site for practical application.

[0012] Preferably, the optical fiber physical model in S1 is established using the XML language model, and the model is established with reference to existing technologies such as "Modeling Engineering Implementation Technical Specification for Intelligent Substation System Specification Description (SSD)", "Engineering Relay Protection Application Model", and "Modeling and Coding Technical Specification for Optical Fiber Circuits in Intelligent Substations".

[0013] Preferably, the internal and external connection method of the secondary components in S2 includes the following steps:

[0014] S21. Create a new project, open the project, then draw the primary wiring diagram to associate the primary and secondary nodes, and then export the SSD file.

[0015] S22. Configure the file opened in S21 through the cubicle, then perform panel configuration, then configure through devices, components, and switches, and connect through cables to export the SPCD file.

[0016] S23. Associate the project file configured through devices, components, and switches in S22 through the ICD, then design the virtual circuit, and then design the network, and then export the SCD file.

[0017] Preferably, the cable connection in S22 includes automatically identifying the cable model, allocating fiber cores and connecting ports to terminals, and the network in S23 includes subnets, communication addresses, and VLANs.

[0018] Preferably, the SSD, SCD, and SPCD files in S4 come from the internal and external connection method of the secondary components in S2.

[0019] Preferably, the attributes of the SSD, SCD, and SPCD files in S4 are analyzed through the SSD model, SCD model, and SPCD device model analysis file attributes in the existing physical logic model.

[0020] A method for analyzing the one - map model of the secondary circuit of an intelligent substation specifically includes the following steps:

[0021] Step 1: Study the one - map model and SSD files to obtain the corresponding relationship between the primary interval of the one - map model and the secondary switchgear cabinets.

[0022] Step 2: Study the principle of the secondary circuit, utilize the connection attributes of components, and automatically screen the circuit connections according to different circuit types.

[0023] Step 3: By sorting out the index relationships among SCD, SPCD, and SSD files, organize the optical - electric circuit signals and virtual - circuit signals in the substation, and achieve optical - electric intercommunication in the form of optical - signal mapping.

[0024] Step 4: Combine with the pilot project of the intelligent substation, and analyze the model according to the analysis method of the one - map model of the secondary circuit of the intelligent substation.

[0025] Preferably, Step 1 further includes studying the connection methods of switchgear cabinets, boards, and terminal blocks, obtaining the connection information of each switchgear cabinet, terminal block, board, and component from the model, and using the connection of the minimum elements to form the connection relationship of switchgear cabinets, terminal blocks, and boards.

[0026] Preferably, both the optical - electric circuit signals and virtual - circuit signals in Step 3 are connected in an automatic connection manner.

[0027] Preferably, the model analysis in Step 4 views the full - path diagrams of the optical circuit and the electric circuit through device board - card ports and terminal - block terminals, etc., and submits the model - analysis results to the engineering - site practice for application.

[0028] The beneficial effects of the present invention are as follows:

[0029] Through the design method of the one - map model of the secondary circuit of the intelligent substation, a digital - twin model of the secondary circuit covering the optical - fiber physical circuit, logical circuit, and electric circuit is constructed, which improves the design level and efficiency of the design work, provides an interface for driving the digital transformation of the power grid, applies to differentiated, scenario - based, and intelligent substations, realizes the digital handover of the secondary circuit of the substation, and quickly locates the optical - electric circuit information through the analysis model, improves the accuracy and convenience of substation implementation, and on this basis, conducts tests on the relying project to form a technical system that can be replicated and promoted.

[0030] In summary, the invention is convenient to use, can improve the design level and efficiency of the design work, improve the accuracy and convenience of substation implementation, and solves the problems of low design level and efficiency existing in the existing intelligent substations, as well as the heavy workload of secondary - circuit debugging work and the low accuracy of substation implementation. Description of the Drawings

[0031] Figure 1Schematic diagram of the structure model in a method for designing a one - map model of the secondary circuit of an intelligent substation according to the present invention.

[0032] Figure 2 Schematic diagram of the physical connection of the optoelectronic circuit in a method for designing a one - map model of the secondary circuit of an intelligent substation according to the present invention.

[0033] Figure 3 Structural diagram of the physical logic model in a method for designing a one - map model of the secondary circuit of an intelligent substation according to the present invention.

[0034] Figure 4 Schematic diagram of the element connection structure in a method for parsing a one - map model of the secondary circuit of an intelligent substation according to the present invention.

[0035] Figure 5 Schematic diagram of the secondary circuit principle in a method for parsing a one - map model of the secondary circuit of an intelligent substation according to the present invention.

[0036] Figure 6 Schematic diagram of the optoelectronic intercommunication principle in a method for parsing a one - map model of the secondary circuit of an intelligent substation according to the present invention. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0038] Embodiment 1

[0039] Refer to Figure 1 - Figure 3 , a method for designing a one - map model of the secondary circuit of an intelligent substation, includes the following steps:

[0040] S1. Refer to Figure 1 , study the SSD configuration method of the intelligent substation and the design method of the secondary optoelectronic circuit, summarize the connection rules, draw on the fiber physical model method, study the subordinate relationship of optoelectronic components, establish an optoelectronic component model. The fiber physical model described in S1 is established using the XML language model, and the model is established with reference to existing technologies such as "Technical Specification for the Implementation of the Modeling Project of the Intelligent Substation System Specification Description (SSD)", "Engineering Relay Protection Application Model", and "Technical Specification for the Modeling and Coding of the Fiber Optic Circuits in Intelligent Substations".

[0041] S2. Refer to Figure 2 , study the physical connection characteristics of the optoelectronic circuit, including the method of the internal and external connection relationship of secondary components. In view of the differences in the component models of the electrical circuit, the internal connection and the external connection of the components are combined to form a complete path. The method of the internal and external connection of the secondary components in S2 includes the following steps:

[0042] S21. Create a new project, open the project, then draw a primary wiring diagram to associate the primary and secondary nodes, and then export the SSD file.

[0043] S22. Configure the file opened in S21 through the cubicle, then perform panel configuration, then configure through devices, components, switches, and connect through cables to export the SPCD file. The cable connection in S22 includes automatically identifying the cable model, allocating fiber cores, and connecting ports to terminals.

[0044] S23. Associate the project file configured through devices, components, and switches in S22 through ICD, then perform virtual circuit design and network design, and then export the SCD file. The network in S23 includes subnets, communication addresses, and VLANs.

[0045] S3. Study the database storage method, disassemble the component model and connections into the smallest units, store their object attributes in the database, and construct a data structure.

[0046] S4. Refer to Figure 3 to study the SSD, SCD, and SPCD file formats and element descriptions, match the virtual circuit connection attributes, optoelectronic circuit connection attributes, and primary component connection attributes in a diagram model with the element attributes of the SSD, SCD, and SPCD files, and store them in the database. The SSD, SCD, and SPCD files in S4 come from the internal and external connection methods of secondary components in S2.

[0047] S5. Combine the intelligent substation pilot project, perform model design according to the design method of the one - diagram model of the secondary circuit of the intelligent substation, and submit the model file to the project site for practical application. The attributes of the SSD, SCD, and SPCD files in S4 are analyzed through the SSD model, SCD model, and SPCD device model analysis files in the existing physical logic model.

[0048] Embodiment 2

[0049] Refer to Figure 4 - Figure 6 A method for parsing the one - diagram model of the secondary circuit of an intelligent substation specifically includes the following steps:

[0050] Step 1. Refer to Figure 4 to study the one - diagram model and the SSD file, obtain the corresponding relationship between the primary intervals and secondary switchgear cabinets of the one - diagram model. Step 1 also includes studying the connection methods of switchgear cabinets, boards, and terminal blocks, obtaining the connection information of each switchgear cabinet, terminal block, board, and component from the model, and using the smallest element connections to form the connection relationships of switchgear cabinets, terminal blocks, and boards.

[0051] Step 2, referring to Figure 5 , study the principle of the secondary circuit, utilize the component connection attributes, and automatically screen the circuit connections according to different circuit types. The optoelectronic circuit signals and virtual circuit signals in Step 3 are both connected in an automatic connection manner;

[0052] Step 3, referring to Figure 6 , by sorting out the index relationships among the SCD, SPCD, and SSD files, organize the optoelectronic circuit signals and virtual circuit signals in the substation, and achieve optoelectronic intercommunication in the form of optoelectronic signal mapping;

[0053] Step 4, in combination with the intelligent substation pilot project, analyze the model according to the analysis method of the one - map model of the secondary circuit of the intelligent substation. The model analysis in Step 4 views the full - path diagrams of the optical circuit and the electrical circuit through device board - card ports and terminal block terminals, and submits the model analysis results to the engineering site for practical application.

[0054] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation, characterized in that, The design method includes the following steps: Step S1-1: Research the SSD configuration method and the secondary optoelectronic circuit design method of the intelligent substation, summarize the connection rules, draw on the fiber optic physical model method, study the subordinate relationship of optoelectronic components, and establish an optoelectronic component model; Step S1-2: Research the physical connection characteristics of the optoelectronic circuit, including the internal and external connection methods of secondary components. In view of the differences in the component models of the electrical circuit, combine the internal connection and the external connection of the components to form a complete path; Step S1-3: Research the database storage method, disassemble the component model and the connection into the smallest units, store their object attributes in the database, and construct a data structure; Step S1-4: Research the file formats and element descriptions of SSD, SCD, and SPCD, match the virtual circuit connection attributes, optoelectronic circuit connection attributes, and primary component connection attributes in a diagram model with the element attributes of SSD, SCD, and SPCD files, and store them in the database; Step S1-5: Combine with the intelligent substation pilot project, conduct model design according to the design method of the secondary circuit diagram model of the intelligent substation, and submit the model file to the project site for practical application; The internal and external connection method of the secondary component in step S1-2 includes the following steps: Step S1-2-1: Create a new project, open the project, then draw a primary wiring diagram, associate the primary and secondary nodes, and then export the SSD file; Step S1-2-2: Configure the file opened in step S1-2-1 through the cubicle, then conduct panel configuration, then configure through equipment, components, and switches, and connect through cables to export the SPCD file; Step S1-2-3: Associate the project file configured through equipment, components, and switches in step S1-2-2 through ICD, then conduct virtual circuit design and network design, and then export the SCD file; The parsing method specifically includes the following steps: Step S2-1: Research the diagram model and the SSD file to obtain the corresponding relationship between the primary interval and the secondary switchgear of the diagram model; Step S2-2: Research the secondary circuit principle, utilize the component connection attributes, and automatically screen the circuit connections according to different circuit types; Step S2-3: By sorting out the index relationship among SCD, SPCD, and SSD files, organize the optoelectronic circuit signals and virtual circuit signals in the substation, and achieve optoelectronic intercommunication in the form of optoelectronic signal mapping; Step S2-4: Combine with the intelligent substation pilot project, and conduct parsing of the model according to the parsing method of the secondary circuit diagram model of the intelligent substation.

2. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, The fiber optic physical model in step S1-1 is established using the XML language model.

3. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, The cable connection in step S1-2-2 includes automatically identifying the cable model, allocating fiber cores, and connecting ports to terminals. The network in step S1-2-3 includes subnets, communication addresses, and VLANs.

4. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, The SSD, SCD, and SPCD files in step S1-4 come from the internal and external connection method of the secondary component in step S1-2.

5. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, The file attributes of SSD, SCD, and SPCD in the steps S1-4 are analyzed through the SSD model, SCD model, and SPCD device model in the existing physical logic model.

6. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, The step S2-1 further includes studying the connection methods of the screen cabinets, boards, and terminal blocks, obtaining the connection information of each screen cabinet, terminal block, board, and component from the model, and using the minimum element connection to form the connection relationships of the screen cabinets, terminal blocks, and boards.

7. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, Both the optoelectronic circuit signals and the virtual circuit signals in the step S2-3 are connected in an automatic connection manner.

8. The design and analysis method for a single-diagram model of the secondary circuit in an intelligent substation according to claim 1, characterized in that, In the step S2-4, the model parsing views the full path diagrams of the optical circuit and the electrical circuit through the device board card ports and the terminal block terminals, and submits the model parsing results for on-site engineering practice applications.

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