Power system main wiring automatic selection method and terminal device

Abstract

The application discloses a kind of electric power system main wiring automatic selection method and terminal equipment, wherein the method includes constructing equipment data model and conductor data model in electric power system;Obtain the reliability parameter of the graphic position template of each wiring form in electric power system;According to the reliability parameter, determine the wiring form that satisfies preset condition, obtain the graphic position template for selection;Obtain the equipment data model and conductor data model corresponding to the graphic position template for selection, and automatically connect, complete electric power system main wiring automatic selection.The electric power system main wiring automatic selection method and terminal equipment provided by the application realize the automation of main wiring selection and drawing through the aid of three-dimensional software, improve the design efficiency, reduce the error, can solve the problem of low efficiency in the process of human selection, and the problem of frequent operation of manual drawing.

Description

Technical Field

[0001] This invention discloses an automatic selection method and terminal equipment for the main wiring of a power system, belonging to the field of power system design technology. Background Technology

[0002] Hydropower engineering design is a specialized and complex systems engineering project. While different hydropower station designs may share commonalities, they are not mass-produced products; each project is unique and extremely complex. The electrical engineering discipline, as a component of hydropower engineering design, involves numerous pieces of equipment and systems. Equipment includes turbine generator sets, generator neutral point equipment, generator circuit breakers, disconnect switches, grounding switches, high-voltage circuit breakers, reactors, current transformers, voltage transformers, surge arresters, transformers, high-voltage cables, and high-voltage power distribution systems. Systems include plant auxiliary power systems, lighting systems, grounding systems, DC systems, and computer monitoring systems. There is extensive coordination and data exchange between these pieces of equipment and systems. The combination of these devices and systems forms the electrical system that enables the hydropower project to generate electricity.

[0003] In hydropower engineering, main wiring design involves the layout, selection, and connection of electrical equipment, cables, and power distribution facilities within the power system. Traditional main wiring design typically relies on manual calculations and drafting, which is time-consuming and prone to errors. Therefore, a method capable of automated selection and drafting is needed to improve design efficiency and accuracy.

[0004] Computer-aided drafting technology, which became widespread in the 1990s, transformed hand-drawn drafting into computer-generated drafting, and design results were stored not only on paper but also in computers. However, this drafting method suffers from several problems: the design concept, process, and data exchange methods remain unchanged; design results (including drawings, written products, and input data) are still discrete graphic or document information, expressed using natural language; computers cannot recognize all the information expressed in the design results, and information integration, utilization, and cross-checking still rely on human intervention; the efficiency and quality of design work are largely constrained by the designer's abilities, experience, and focus; and the natural language-based expression of design results makes it difficult to further improve the efficiency and quality of design work. Summary of the Invention

[0005] The purpose of this application is to provide an automatic selection method and terminal equipment for the main wiring of a power system, so as to solve the technical problems of low accuracy and low efficiency in the main wiring design of the prior art.

[0006] The first aspect of the present invention provides an automatic selection method for the main wiring of a power system, comprising:

[0007] Construct equipment data models and conductor data models in the power system;

[0008] Obtain the reliability parameters of the graphical location template for each wiring configuration in the power system;

[0009] Based on the reliability parameters, determine the wiring configuration that meets the preset conditions to obtain a graphic position template for selection;

[0010] The device data model and conductor data model corresponding to the graphic location template for selection are obtained and automatically connected to complete the automatic selection of the main wiring of the power system.

[0011] Preferably, the reliability parameters include at least one of power supply continuity parameters, power supply adequacy parameters, and operational safety parameters.

[0012] Preferably, the power supply continuity parameter includes at least one of the following: probability of obstruction, frequency of obstruction, expected obstruction time, and average duration of obstruction.

[0013] The power supply adequacy parameters include the expected amount of blocked power and / or the expected amount of blocked electricity.

[0014] Preferably, the process of obtaining the device data model and conductor data model corresponding to the selection graphic position template and automatically connecting them includes:

[0015] Obtain the device data model and conductor data model corresponding to the graphic position template used for selection;

[0016] According to the connection rules between devices preset in the selection graphic location template, the conductor data model in the selection graphic location template is automatically connected to the device data model in the selection graphic location template.

[0017] Preferably, after completing the automatic selection of the main wiring of the power system, the method further includes:

[0018] Based on the tree structure corresponding to the wiring configuration that meets the preset conditions obtained after automatic connection, the main wiring diagram of the power system is automatically drawn.

[0019] Preferably, after automatically drawing the main wiring diagram of the power system, the method further includes:

[0020] Obtain the drawing information of the main wiring diagram of the power system, the drawing information including attribute information in the equipment data model and attribute information in the conductor data model;

[0021] Based on the drawing information, the equipment corresponding to the main wiring of the driving power system is arranged to obtain a three-dimensional model of the main wiring of the power system.

[0022] Preferably, the graphic location template includes the number of installed units, the type of incoming line, the type of outgoing line, the location information of the equipment, and the connection information of the conductors.

[0023] Preferably, the preset condition is the maximum reliability value.

[0024] Preferably, after constructing the equipment data model and conductor data model in the power system, the method further includes:

[0025] The device data model and conductor data model are stored in the database.

[0026] A second aspect of the present invention provides a terminal device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method.

[0027] The automatic selection method and terminal equipment for main wiring of power systems of the present invention have the following advantages compared with the prior art:

[0028] This invention proposes an automatic selection method and terminal equipment for main wiring of electrical systems. With the assistance of 3D software, the selection and drawing of main wiring are automated, which improves design efficiency, reduces errors, and solves the problems of low efficiency in the manual selection process and frequent manual drawing operations. Attached Figure Description

[0029] Figure 1 This is a flowchart of an automatic selection method for main wiring in a power system according to an embodiment of the present invention;

[0030] Figure 2 This is a selection graphic position template diagram obtained after reliability analysis in an embodiment of the present invention;

[0031] Figure 3 This is a structure tree formed by the equipment data model corresponding to the graphic position template used for selection in this embodiment of the invention;

[0032] Figure 4 and Figure 5 These are, respectively, the structure tree formed by the conductor data model corresponding to the graphic position template in the embodiment of this invention;

[0033] Figure 6 This is the main wiring diagram of the power system automatically drawn in the embodiments of the present invention;

[0034] Figure 7 yes Figure 6 Amplified section of the main wiring diagram;

[0035] Figure 8 This is the list export interface in this embodiment of the invention;

[0036] Figure 9 This is the exported material report list in Excel format in this embodiment of the invention;

[0037] Figure 10 This is a three-dimensional model diagram generated from two dimensions in an embodiment of the present invention;

[0038] Figure 11 This is a reused interface for the graphic position template in this embodiment of the invention;

[0039] Figure 12 This is a diagram illustrating the reuse process of the graphic position template in an embodiment of the present invention;

[0040] Figure 13 This is an operation diagram of a specific device reused through operation symbols in an embodiment of the present invention;

[0041] Figure 14 yes Figure 13 A magnified view of the selected area in the tree structure;

[0042] Figure 15 This is an overall interface diagram of the 3D software used in the embodiments of the present invention. Detailed Implementation

[0043] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0044] The first aspect of this invention provides an automatic selection method for the main wiring of a power system. The selection operation is based on three-dimensional software and can be applied to various business scenarios, such as water conservancy and hydropower projects and wind power generation projects.

[0045] The automatic selection method for main wiring of power systems according to embodiments of the present invention, such as... Figure 1 As shown, it includes the following steps:

[0046] Step 1: Construct equipment data models and conductor data models in the power system.

[0047] In this embodiment of the invention, a device data model and a conductor data model are constructed in three-dimensional software, wherein the conductors include hard conductors and soft conductors.

[0048] When constructing the above-mentioned equipment data model and conductor data model, it is necessary to clarify the equipment type and conductor type in accordance with electrical design rules, and implement the corresponding attribute extension in the 3D software.

[0049] For example, the corresponding type of attribute can be rated voltage, rated current, etc., and this attribute is extended in the reference attributes of the equipment data model and the conductor data model. Specifically, detailed data is filled into the reference attributes of the corresponding data model.

[0050] After obtaining the above data model, it is stored in the database of the 3D software for management.

[0051] Step 2: Obtain the reliability parameters of the graphic location template for each wiring configuration in the power system.

[0052] The graphic position template in this embodiment of the invention includes the two-dimensional placement position of the equipment in the corresponding wiring configuration, which is recorded in coordinate form; it also includes the number of installed units, the incoming line configuration, the outgoing line configuration, the equipment position information, and the conductor connection information, etc.

[0053] For example, in one specific embodiment, the graphic location template includes a four-unit (number of units installed) joint unit with incoming lines (incoming line type) and two busbars with two outgoing lines (outgoing line type).

[0054] Furthermore, the reliability parameters in the embodiments of the present invention include at least one of power supply continuity parameters, power supply adequacy parameters, and operational safety parameters.

[0055] A particular outgoing line (switching node) in a primary electrical wiring system is powered by several power transmission channels, which are called minimum paths. When a combination of component failures causes all these minimum paths to be disconnected, the power supply to this outgoing line will be interrupted. Power supply continuity parameters study which specific components, under what conditions, fail to cause a power supply interruption. Power supply continuity parameters include at least one of the following: probability of obstruction, frequency of obstruction, expected obstruction time, and average duration of obstruction.

[0056] Taking pumped storage power stations as an example, the above power supply continuity parameters are explained.

[0057] (1) Probability of generation failure (LOGP):

[0058] The sum of all fault states that would cause a pumped storage power station to fail to operate at its rated power generation capacity or rated pumping capacity under either power generation or pumping conditions.

[0059]

[0060] In the formula, i = 1, ..., n, where n = S / Δx, S is the total installed capacity of the power plant under power generation or pumping conditions; Δx is the step size of the outage table; Pi Let be the probability corresponding to the i-th capacity.

[0061] (2) Loss of generation frequency (LOGF):

[0062] The sum of all fault frequencies that prevent a pumped storage power station from operating at its rated generating or pumping capacity within a given time interval, expressed in times per year.

[0063]

[0064] In the formula, f i Let be the frequency corresponding to the i-th capacity.

[0065] (3) Loss of generation expectation (LOGE):

[0066] The expected number of hours or days within a given time interval during which a pumped storage power station cannot operate at its rated capacity, expressed in hours or days.

[0067]

[0068] (4) Loss of generation duration (LOGD):

[0069] The average duration of each instance during which a pumped storage power station cannot operate at its rated capacity within a given time interval, typically expressed in hours per instance.

[0070]

[0071] Power supply adequacy refers to the requirement that the reliability of the primary electrical wiring also ensures a certain level of load supply to the power grid. A fault combination of a component in the primary wiring system often does not disconnect all the minimum paths of all outgoing lines, thus not causing a complete loss of power load, but only a partial reduction in power supply capacity. Power supply adequacy analysis includes two aspects: firstly, it considers the degree of load loss caused by the disconnection of minimum paths due to component fault combinations; secondly, it uses certain criteria to determine whether this partial loss of power supply capacity constitutes a system fault. In this embodiment of the invention, the power supply adequacy parameters include the expected amount of obstructed power and / or the expected amount of obstructed electrical power.

[0072] (1) Expected Energy Not Supplied (EENS):

[0073] The expected amount of electricity that a unit or outgoing line cannot supply due to a fault within a given time interval, usually expressed in MWh / year.

[0074]

[0075] In the formula, S i This represents the power generation capacity value corresponding to the i-th capacity.

[0076] (2) Expected Demand Not Supplied (EDNS):

[0077] The expected amount of power that a unit or outgoing line cannot supply due to a fault within a given time interval, usually measured in MW.

[0078]

[0079] Analysis of power supply continuity shows that if a fault combination of a component in the main wiring system can disconnect all the minimum paths of a power supply node, the external power supply to that node will be interrupted. In the main wiring system, these minimum paths are also connected to generators (source nodes). When all the minimum paths connecting a generator are disconnected, that generator unit will also be forced to shut down. Operational safety measures the degree to which the reliability of the power plant's primary system main wiring affects the safe operation of the power system. It includes the analysis of forced shutdowns of generator units and outgoing lines, and this is based on the impact of component fault combinations on minimum paths. The main indicators for measuring operational safety include the probability and frequency of disconnecting one or more generators and the probability and frequency of disconnecting one or more lines.

[0080] (1) The probability and frequency of one or more machines being delisted are: the sum of the probabilities and frequencies of all fault states that satisfy the condition of one or more machines being delisted.

[0081] (2) The probability and frequency of one or more circuits being disconnected are the sum of the probabilities and frequencies of all fault states that satisfy the condition of one or more circuits being disconnected.

[0082] Step 3: Based on reliability parameters, determine the wiring configuration that meets the preset conditions to obtain the selection graphic location template, such as... Figure 2 As shown.

[0083] For example, the reliability value of one of the following parameters—power supply continuity, power supply adequacy, and operational safety—can be calculated for each wiring configuration. These values ​​are then compared, and the wiring configuration that meets preset conditions is selected to obtain a selection graphic location template. The preset conditions can be a maximum reliability value or a reliability value greater than a preset threshold.

[0084] When calculating, if at least two of the reliability parameters are considered, such as power supply continuity, power supply adequacy, and operational safety, the weighted average, product, or sum of the two parameters can be calculated to determine a reliability value for each wiring configuration. Then, the reliability values ​​can be compared to select the wiring configuration that meets the preset conditions, thus obtaining a graphic position template for selection.

[0085] When more than two indicators are used in power supply continuity parameters, power supply adequacy parameters, and operational safety parameters, the indicators can be normalized by using a weighted average, product, or sum to obtain a value for each parameter.

[0086] Step 4: Obtain the equipment data model and conductor data model corresponding to the graphic location template for selection, and automatically connect them to obtain a structure tree of wiring forms that meet preset conditions, thus completing the automatic selection of the main wiring of the power system. This specifically includes:

[0087] Obtain the equipment data model and conductor data model corresponding to the graphic location template for selection. The equipment data model corresponding to the graphic location template for selection is as follows: Figure 3 As shown, Figure 3 The device data model corresponding to the selected graphic location template will be placed in the view, specifically below the parent node of the main wiring.

[0088] Furthermore, the conductor data model corresponding to the graphic location template used for selection is as follows: Figure 4 and Figure 5 As shown.

[0089] Based on the connection rules between devices preset in the graphic location template for selection, the system automatically identifies device ports for conductor connection. For example, the output port of a hydro generator is connected to an electric braking circuit breaker, resulting in a tree structure of wiring forms that meet preset conditions, thus completing the automatic selection of the main wiring of the power system.

[0090] Furthermore, after completing the automatic selection of the main wiring of the power system, it also includes:

[0091] Step 5: Based on the tree structure corresponding to the wiring configurations that meet the preset conditions obtained after automatic connection, automatically draw the main wiring diagram of the power system, such as... Figure 6 and Figure 7 As shown, where Figure 6 The right half of the diagram is the automatically drawn main wiring diagram of the power system.

[0092] Following step 5, the following is also included:

[0093] Step 6: Obtain the drawing information for the main wiring diagram of the power system. The drawing information includes attribute information from the equipment data model and attribute information from the conductor data model, specifically including:

[0094] The software method reads the drawing information of the main wiring diagram of the power system. The drawing information includes the attribute information (quantity, model specifications, type, etc.) of the equipment data model and conductor data model. Then, it outputs a material list, which can be in Excel format.

[0095] For example, Figure 8 This is the export interface for the inventory in 3D software. Figure 9 This is the exported Excel file list of materials.

[0096] Step 7: Based on the drawing information, arrange the equipment corresponding to the main wiring of the power system to obtain a 3D model of the main wiring of the power system. Specifically, through a software-consumable 2D / 3D driving concept, complete the detailed layout design of the main wiring in 3D to obtain a 3D model, such as... Figure 10 As shown.

[0097] The concept of consumable two-dimensional and three-dimensional driving refers to the fact that the two-dimensional symbol display of the software can be synchronously driven in the three-dimensional model to generate a unique three-dimensional model data with a physical appearance. For example, the three-dimensional display of the main transformer model A is only the three-dimensional model data of the transformer model A. Therefore, the same model and quantity can be created in the three-dimensional physical layer through the model data in the main wiring, achieving true data homogeneity.

[0098] The detailed layout design of equipment in the main wiring diagram in 3D can be called the associated 2D / 3D layout method. This refers to confirming the physical position of the driven 3D data model with the factory or other related disciplines in the 3D physical layer, such as the distance from the wall and the orientation of the equipment. When assembling and quickly positioning the obtained 3D equipment modules in the factory, these 3D devices can be constrained by points and axes, etc.

[0099] The specific implementation steps of the associated two-dimensional and three-dimensional arrangement method are as follows:

[0100] In the software's operation bar, find the Logic to Physics Assistant. Click the Physics Assistant and then click on the devices you inserted in the logical layer. In the preferences, only select the devices and electrical devices for analysis. Then, select the parent node to choose which parent node you want to place the 3D model under. Finally, return to the Logic to Physics Assistant's operation interface, where you can choose between automatic and manual placement to achieve the associative arrangement of 2D and 3D models.

[0101] This invention adopts a software-consumption-based two-dimensional and three-dimensional driving concept, which can realize forward analysis of the principle wiring equipment and search for the corresponding three-dimensional equipment in the library for item placement, and can also meet the reverse coordination and association between equipment and main wiring. That is, the equipment is placed first and then associated with the principle equipment;

[0102] The associated 2D and 3D layout method allows you to select the standard and drawing size for the equipment layout on the engineering drawing. For the equipment layout, you can adjust the projection scale of the drawing in the drawing column according to the actual cable tray model, etc. In the equipment 3D model window, select the equipment to be projected, select the projection plane of the front view for projection, and finally export it in DWG format for drawing output. This realizes the collaborative layout and projection of the main wiring equipment from 2D to 3D in the 3D software.

[0103] Addressing the issue that existing manual selection methods and drawing modes are insufficient to support design efficiency and quality, this invention provides an automatic selection method and terminal equipment for main wiring of electrical systems. With the assistance of 3D software, it automates the selection and drawing of main wiring, improves design efficiency, reduces errors, and solves the problems of low efficiency in the manual selection process and frequent manual drawing operations.

[0104] This invention also provides a method for reusing graphic position templates of existing wiring forms, such as... Figure 11 and Figure 12 As shown, specifically: Use the directory browser to select the electrical resource library, find the same project as shown in the system access report, reuse its generator motor and main transformer combination method, unit start-up, synchronous commutation and braking method, instantiate and insert the electrical main wiring schemes of each voltage level in the library, and place the main wiring view in the appropriate position with the mouse cursor. This allows for faster drawing of the main wiring diagram, requiring only minor adjustments.

[0105] Furthermore, to improve efficiency, the selected module can be instantiated within the view using operation symbols, such as... Figure 13 As shown, specifically, this refers to the commands used with operation symbols after a machine is created. Figure 14 The corresponding unit equipment is instantiated in the new view without changing the relevant attributes of the original equipment. Figure 13 Select the equipment corresponding to the box column in the right view of the area in the structure tree; connect the wiring form, SFC system device and high voltage side wiring form by using the conductor type in the catalog library to finally complete the drawing of the main wiring diagram, and leave the connection interface with the subsequent high voltage plant power system, namely the plant high voltage transformer interface, in the plant power system.

[0106] The overall interface of the 3D software used in this invention is as follows: Figure 15 As shown.

[0107] A second aspect of the present invention provides a terminal device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method.

[0108] This paper presents an automatic selection method for main wiring diagrams in power systems based on 3D software. In electrical engineering design, the original main wiring selection rules are customized into software selection rules. The original single graphical representation is transformed into attribute-based devices and systems within the software, facilitating computer recognition and retrieval. This computer software can identify data models and rules, automatically complete the selection based on input conditions, and automatically generate a layout of the graphical data model according to the input wiring configuration. Through a software-driven 2D / 3D approach, the detailed layout design of the main wiring equipment in 3D is completed. This reduces the workload of designers in selection and drawing, avoids repetitive work, reduces design errors, shortens the design cycle, effectively reduces design costs, and generates good economic benefits.

[0109] The application of this invention in hydropower engineering design can generate a large number of mature cases and accumulate and refine rich engineering data solutions, which is conducive to the inheritance of engineering experience of design units and forms a valuable data wealth that can be read and recognized by computers.

[0110] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A method for automatic selection of main wiring in a power system, characterized in that, include: Construct equipment data models and conductor data models in the power system; The reliability parameters of the graphic location template for each wiring configuration in the power system are obtained; the graphic location template includes the number of installed units, incoming line configuration, outgoing line configuration, equipment location information, and conductor connection information. Based on the reliability parameters, determine the wiring configuration that meets the preset conditions to obtain a graphic position template for selection; Obtain the equipment data model and conductor data model corresponding to the graphic location template used for selection, and automatically connect them to complete the automatic selection of the main wiring of the power system. Specifically, this includes: Obtain the device data model and conductor data model corresponding to the graphic position template used for selection; According to the connection rules between devices preset in the selection graphic location template, the conductor data model in the selection graphic location template is automatically connected to the device data model in the selection graphic location template. After completing the automatic selection of the main wiring of the power system, the following is also included: Based on the tree structure corresponding to the wiring forms that meet the preset conditions obtained after automatic connection, the main wiring diagram of the power system is automatically drawn. After automatically drawing the main wiring diagram of the power system, the following is also included: Obtain the drawing information of the main wiring diagram of the power system, the drawing information including attribute information in the equipment data model and attribute information in the conductor data model; Based on the drawing information, the equipment corresponding to the main wiring of the driving power system is arranged to obtain a three-dimensional model of the main wiring of the power system.

2. The automatic selection method for main wiring of a power system according to claim 1, characterized in that, The reliability parameters include at least one of the following: power supply continuity parameters, power supply adequacy parameters, and operational safety parameters.

3. The automatic selection method for main wiring diagrams of a power system according to claim 2, characterized in that, The power supply continuity parameters include at least one of the following: probability of obstruction, frequency of obstruction, expected obstruction time, and average duration of obstruction. The power supply adequacy parameters include the expected amount of blocked power and / or the expected amount of blocked electricity.

4. The automatic selection method for main wiring of a power system according to claim 1, characterized in that, The preset condition is that the reliability value is maximized.

5. The automatic selection method for main wiring of a power system according to claim 1, characterized in that, After constructing the equipment data model and conductor data model in the power system, the following is also included: The device data model and conductor data model are stored in the database.

6. A terminal device, 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 the steps of the method as described in any one of claims 1 to 5.

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