A method for automatically generating a main wiring diagram of an intelligent substation based on a feature template

Abstract

The application discloses a kind of intelligent substation main wiring diagram automatic generation method based on feature template, based on the existing substation main wiring diagram graphic file construction framework feature template file, interval feature template file;Analysis newly built, reconstruction or expansion substation SSD file, obtain including primary equipment, main transformer, bus, interval, wiring mode substation data structure information;According to substation data structure information matching framework feature template file and interval feature template file, and copy to canvas, form new substation main wiring diagram;Look up corresponding signal point in local database, serialize the first and last end node number of same type equipment in interval, and distinguish and bind through signal point in local library.The application realizes the automatic layout, automatic drawing, automatic association of modifying existing substation graphics, not only reduce the workload of engineering personnel, also greatly improve drawing efficiency and drawing quality.

Description

TECHNICAL FIELD

[0001] The application relates to a feature template-based intelligent substation main wiring diagram automatic generation method and belongs to the technical field of substation automation. BACKGROUND

[0002] With the continuous development of power system construction and the continuous expansion of the power grid, the number of substations has increased rapidly. At present, the primary main wiring diagram of a substation is mostly manually drawn by professional personnel according to drawings, that is, first, data model information of power equipment is imported into a database configuration tool, then a primary main wiring diagram of a substation is drawn through a special graphic editing tool of a substation monitoring system, and finally, model equipment in the database is associated with equipment in the graphic by dragging through the database configuration tool. When a new substation and related supporting industry expansion project are built, the digitalized diagram model in the substation system needs to be synchronously maintained. The existing graphic editor lacks intelligent auxiliary drawing function and mainly relies on manual copy-paste type manual maintenance. Such a mode is time-consuming and laborious and is prone to errors.

[0003] The power grid main wiring diagram is a graphical representation of the power generation, transmission, transformation and distribution relationship and the topological structure relationship of power grid primary equipment. Therefore, the topological relationship between primary equipment can be obtained by analyzing the main wiring diagram. How to automatically generate the main wiring diagram of a newly built or expanded substation according to the obtained topological relationship is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0004] Objective: In order to overcome the deficiencies in the prior art, the application provides a feature template-based intelligent substation main wiring diagram automatic generation method. In view of the fact that the drawing styles of various substations in a certain region are similar, the main wiring diagrams of various substations can be collected as feature templates, and feature extraction analysis is performed on the main wiring diagrams to obtain feature files of busbars, transformers and compartments. If the sample size cannot meet the automatic diagram generation requirement, that is, the corresponding template cannot be found in the automatic diagram generation process, a framework generation algorithm is used to draw a framework template. Based on this method, the main wiring diagram of a substation can be automatically generated in combination with the data model file of the substation when the substation is newly built or expanded.

[0005] Technical scheme: To solve the above technical problems, the technical scheme adopted by the application is as follows:

[0006] A feature template-based intelligent substation main wiring diagram automatic generation method comprises the following steps:

[0007] Extracting a framework graphic identifier and framework information from an existing substation main wiring diagram graphic file to construct a framework feature template file, and extracting a compartment graphic identifier and compartment information to construct a compartment feature template file.

[0008] Parse the newly built, reconstructed or expanded substation SSD file to obtain substation data structure information including primary equipment, main transformer, bus, interval, and connection mode.

[0009] According to the substation data structure information, match the frame feature template file and the interval feature template file, and copy the graphic identifier, frame information and graphic identifier, interval information to the canvas to form a new substation main connection diagram.

[0010] According to the frame information and interval information in the new substation main connection diagram, find the corresponding signal points in the local database, serialize the first and last end node numbers of the same type of equipment in the interval, and distinguish and bind them through the signal points in the local library.

[0011] As a preferred scheme, it further comprises:

[0012] In the new substation main connection diagram, optionally select a certain interval on the side of a certain voltage level bus, and perform a NOT operation on the value of the signal point bound by the equipment in the interval in the local library, check whether the shape and color of the related equipment graphic element in the graph change correctly, if yes, the graph is consistent, otherwise, rebind.

[0013] As a preferred scheme, the graphic file of the existing substation main connection diagram further comprises a file format check on the graphic file, and the format check includes whether the file content format is correct, whether each primary equipment contains a voltage level, and whether the endpoints are connected; if the conditions are met, the features of the graphic file are extracted, and if the conditions are not met, the graphic file is rejected.

[0014] As a preferred scheme, the method for constructing the frame feature template file comprises the following steps:

[0015] The interval connection of the graphic file is removed, and the connection of the main transformer and the bus is retained, and the highest voltage level described in the graphic file is taken as the name to generate a frame feature template file containing the bus connection mode, the main transformer type and the number.

[0016] As a preferred scheme, the method for constructing the interval feature template file comprises the following steps:

[0017] The graphic file is classified according to the interval type, and under the same voltage level, one interval of the same type is selected to generate an interval feature template file of the corresponding interval type containing the number of devices, the type of devices and the connection mode, and the orientation information.

[0018] As a preferred scheme, the interval type includes: incoming and outgoing line interval, bus tie interval, bus section interval, main transformer interval, and auxiliary interval.

[0019] As a preferred solution, the framework feature template file and the interval feature template file are matched according to the substation data structure information, and the graphic identification, the framework information and the graphic identification, the interval information are copied to the canvas to form a new substation main wiring diagram, which comprises the following steps:

[0020] According to the number of main transformers and busbars in the substation data structure information, similar framework feature template files are screened out in the framework feature template file, and then the number of busbars under each voltage level and the wiring mode in the substation data structure information are taken as new evaluation parameters to select the most suitable framework feature template file.

[0021] According to the interval information in the substation data structure information, interval matching is sequentially performed in the interval feature template file, the matched interval feature template file is copied to the canvas from the busbar as a starting point, the direction of the framework feature template file and the interval feature template file is automatically matched according to the wiring orientation information of different intervals and busbars, and all intervals are connected with the busbars to form a new substation main wiring diagram.

[0022] As a preferred solution, if there is no most suitable framework feature template file, the wiring type and voltage level of the busbar in the substation data structure information are obtained, the busbar is automatically drawn according to the wiring type and voltage level information of the busbar and the specification description, the main transformer is drawn in the blank area in the region surrounded by all busbars, the distance between the main transformers is automatically adjusted, a new framework feature template file is formed, and the new framework feature template file is taken as the most suitable framework feature template file.

[0023] As a preferred solution, it is checked whether the new substation main wiring diagram has interval overlap and interval orientation error, if the interval overlap occurs, the length of the busbar is adjusted, and if the interval orientation error occurs, the interval orientation is adjusted.

[0024] Beneficial effects: the intelligent substation main wiring diagram automatic generation method based on the feature template provided by the application trains various feature libraries through feature extraction on a large number of main wiring diagram samples, loads and analyzes the substation data structure information generated by the SSD file during running, performs framework matching and interval matching, automatically draws a framework as an optimal template if the framework matching fails, and improves the success rate of framework template matching. Through interval area analysis, conflict detection and other methods, the problem of graphic element and text overlap is ingeniously solved, so that the target graphic is constructed, and the graphic model entity is automatically generated.

[0025] The application realizes automatic layout, automatic drawing and automatic association of graphics, not only reduces the workload of engineering personnel, but also greatly improves the drawing efficiency and drawing quality. Compared with the prior art, the application has the following advantages and progress:

[0026] 1) Frame templates can be automatically generated. When frame matching fails, an algorithm can automatically draw a frame template to improve the success rate of frame matching.

[0027] 2) Automatic graphic drawing. Eliminates the need for manual copying and duplication in drawing, improving graphic accuracy.

[0028] 3) Automatic data association. Automatically generate map models, ensuring automatic association between map models and improving map model quality.

[0029] 4) Maintain consistent style. The automatically generated substation main wiring diagrams are completely consistent in style with manually drawn graphics, conforming to the monitoring usage habits of various regions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the method flow of the present invention.

[0031] Figure 2 This is a schematic diagram of the feature template generation process. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments.

[0033] This invention discloses an automatic generation method for main wiring diagrams of intelligent substations based on feature templates. The method automatically generates main wiring diagrams using feature templates and a data model. (Refer to...) Figure 1 The flowchart shown includes the following steps:

[0034] Step 1: The graphic file of the substation main wiring diagram describes the topological relationship of all primary equipment. Analyze all legal graphic files in the substation main wiring diagram file library, create unique graphic identifiers for frames and bays based on the graphic files, extract frame information and bay information, combine the graphic identifiers of frames and bays with the frame information and bay information to form a feature template file and save it in the library.

[0035] refer to Figure 2 The flowchart shown illustrates the method for generating the frame and interval feature template files as follows:

[0036] 1) Load the graphic file of the substation main wiring diagram and perform a graphic file format check. The format check includes: whether the file content format is correct, whether each primary device includes the voltage level, and whether the terminals are connected. If the conditions are met, the graphic file is considered valid and feature extraction is performed; otherwise, the graphic file is discarded.

[0037] 2) Remove the interval connection in the qualified graphic file, and keep the connection of the main transformer and bus. Generate the framework feature template file containing the bus connection mode, main transformer type and quantity, with the highest voltage level described in the graphic file as the name. For example, 220 kV template and 110 kV template;

[0038] 3) Classify the qualified graphic file by interval type. In the same voltage level, select one interval in the same type interval to generate the interval feature template file containing the device quantity, device type, connection mode and orientation information of the corresponding interval type. The interval type includes incoming and outgoing line interval, bus coupler interval, bus section interval, main transformer interval and auxiliary interval. For example, line interval file and main transformer interval file.

[0039] 4) Merge the framework feature template file and the interval feature template file into the feature template file and save it in the database.

[0040] Step two, the system specification description (SSD) is used to describe the topology structure of the substation main wiring diagram and the logical node function matched with the main wiring diagram. By analyzing the SSD file, the primary device information, main transformer information, bus information, interval information and connection mode information can be obtained. On this basis, the main transformer, bus and interval and topology relationship information, auxiliary equipment (including AC line segment, station transformer, load, capacitance and reactance) can be checked by manual checking, and the substation data structure information based on the primary device, main transformer, bus, interval and connection mode information is stored in the memory for subsequent automatic generation of graph calling.

[0041] Step three, according to the substation data structure information generated in step two, match the similar framework feature template file and interval template feature file, copy the framework information and interval information to the canvas for layout drawing. The template matching and layout drawing method on the canvas is:

[0042] 1) Template matching is to find a similar graphic template with the current substation structure, and to follow the layout mode of its bus and main transformer. According to the voltage level, bus information, connection mode, interval information and main transformer information described in the main transformer information and bus information in the substation data structure information generated in step two, the similar framework feature template file is selected according to the main transformer and bus quantity in the framework feature template file, and the most suitable framework feature template file is selected according to the bus quantity and connection mode information under each voltage level as the new evaluation parameter.

[0043] 2) If the framework feature template file matching fails due to too few substation main wiring diagram graphic file samples, the framework generation algorithm is called to automatically draw the framework template. Combined with the substation data structure information parsed in step two, the busbar connection type and voltage level are obtained. According to the relevant specification description of the substation monitoring system graphic interface, different substations have different voltage level combination methods, and different voltage level combinations have different drawing methods in the main wiring diagram. Therefore, the framework generation algorithm is used to automatically draw the busbar based on the busbar connection type, voltage level information and specification description. The main transformer is drawn in the blank area surrounded by the busbar, and the spacing between the main transformers is automatically adjusted. Finally, the drawn framework template is copied as a new framework feature template file to the canvas. In this way, the framework matching success rate can be improved.

[0044] 3) The primary equipment information and interval information in the substation data structure information generated in step two contain the interval associated busbar, main transformer, equipment quantity and equipment type, and voltage level. Starting from the busbar, interval matching is performed in the interval feature template file according to the interval information description, and the matched interval feature template file is copied to the canvas, which can ensure that the automatically generated substation main wiring diagram is completely consistent with the manually drawn graphic style.

[0045] 4) According to the connection direction information of different intervals and busbars, the direction of the framework feature template file and the interval feature template file is automatically matched, and all intervals are connected to the busbar. This may cause incomplete interval drawing due to overlapping. In this process, the busbar length needs to be dynamically adjusted to check whether the model object has overlapping.

[0046] 5) After automatic layout, manual inspection of the completeness of the graphic is required. According to the arrangement of the busbar, the orientation of each interval and the spacing of the same type of interval can be manually adjusted, and whether there is overlapping is detected. If there is overlapping, manual adjustment of the interval spacing and orientation is required, and the interval is redrawn until there is no overlapping. At this point, the substation main wiring diagram is complete.

[0047] Step four, after completing the drawing of the substation main wiring diagram, according to the model information of each device object in the framework feature template file and the interval feature template file, the corresponding signal points are found in the local database. The first and last end node numbers of the same type of equipment in the interval are serialized, and are distinguished and bound through the signal points in the local library. To ensure the consistency of the graphic model, prevent the existence of the same type of object in an interval from causing the signal points to be indistinguishable.

[0048] Step five, the generated main wiring diagram is verified by topology data, a certain interval is randomly selected at the bus side of a certain voltage level, the value of the signal point bound by the equipment in the interval is taken in the local database, and it is checked whether the shape and color of the related equipment graphic element in the graph are changed correctly, so as to ensure the consistency of the graph model and improve the accuracy of the graph; After ensuring that the substation main wiring diagram is completed, the local substation main wiring diagram file can be generated, and the drawing of the whole substation main wiring diagram is completed.

[0049] The application trains various feature libraries by feature extraction on a large number of substation main wiring diagram samples, loads and analyzes the substation data structure information generated by the SSD file during running, performs frame matching and interval matching, and automatically draws a frame as an optimal template if the frame matching fails, thereby greatly improving the success rate of frame template matching and the generation efficiency of the substation main wiring diagram. Through interval area analysis and conflict detection, the problem of graphic element and text overlap is ingeniously solved, thereby constructing a target graph and automatically generating a graph model entity.

[0050] The above is only the preferred embodiment of the application, and it should be pointed out that those skilled in the art can make some improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered within the protection scope of the application.

Claims

1. A feature template based intelligent substation main wiring diagram automatic generation method, characterized in that: The method comprises the following steps: Based on the existing substation main wiring diagram of the graphic file extraction framework graphic identification, framework information construction framework feature template file; extraction interval graphic identification, interval information construction interval feature template file; Parse the newly built, rebuilt or expanded substation SSD file to obtain the substation data structure information including primary equipment, main transformer, bus, interval and wiring mode; According to the substation data structure information, match the framework feature template file and the interval feature template file, and copy the graphic identification, framework information and graphic identification, interval information to the canvas to form a new substation main wiring diagram; According to the framework information and interval information in the new substation main wiring diagram, find the corresponding signal points in the local database, serialize the first and last end node numbers of the same type of equipment in the interval, and distinguish and bind them through the signal points in the local library; According to the substation data structure information, match the framework feature template file and the interval feature template file, and copy the graphic identification, framework information and graphic identification, interval information to the canvas to form a new substation main wiring diagram, which comprises: According to the number of main transformers and buses in the substation data structure information, filter out similar framework feature template files in the framework feature template file, and then take the number of buses at each voltage level and the wiring mode in the substation data structure information as new evaluation parameters to select the most suitable framework feature template file; According to the interval information in the substation data structure information, sequentially search for the interval in the interval feature template file, copy the matched interval feature template file to the canvas starting from the bus, and automatically match the direction of the framework feature template file and the interval feature template file according to the wiring direction information of different intervals and buses, and connect all intervals with buses to form a new substation main wiring diagram.

2. The method of claim 1, wherein the method is characterized in that: It also includes: In the new substation main wiring diagram, optionally select a certain interval on the side of a bus at a certain voltage level, and perform a NOT operation on the value of the signal point bound to the equipment in the interval in the local library, check whether the shape and color of the related device primitive in the graph change correctly, if so, the graph and the model are consistent, otherwise, rebind.

3. The method according to claim 1 or 2, characterized in that: The graphic file of the existing substation main wiring diagram also includes file format checking of the graphic file, and the format checking content includes: whether the file content format is correct, whether each primary equipment contains a voltage level, and whether the end points are connected; if the conditions are met, the feature of the graphic file is extracted, otherwise, the graphic file is rejected.

4. The method according to claim 1 or 2, characterized in that: The method for constructing the framework feature template file comprises the following steps: Remove the interval wiring in the graphic file, retain the main transformer and bus wiring, take the highest voltage level described in the graphic file as the name, and generate a framework feature template file containing the bus wiring mode, main transformer type and quantity.

5. The method of claim 1 or 2, wherein the method further comprises: The method for constructing the interval feature template file comprises the following steps: Classify the graphic file by interval type, select one interval in the same type of interval under the same voltage level, and generate an interval feature template file containing the number of devices, device type, wiring mode and direction information of the corresponding interval type.

6. The feature template based intelligent substation primary diagram automatic generation method according to claim 5, characterized in that, The interval types include: access line interval, bus coupler interval, bus coupler interval, main transformer interval, and subsidiary interval.

7. The method of claim 1, wherein the method further comprises: If there is no most suitable frame feature template file, the wiring type and voltage level of the bus in the substation data structure information are acquired, a bus is automatically drawn based on the wiring type and voltage level information of the bus and the specification description, a main transformer is drawn in a blank area in a region surrounded by all buses, the distance between the main transformers is automatically adjusted, a newly added frame feature template file is formed, and the newly added frame feature template file is taken as the most suitable frame feature template file.

8. The method of claim 1, wherein the method further comprises: Whether the new substation main wiring diagram has interval overlap and interval orientation error is checked, if there is interval overlap, the bus length is adjusted; if there is interval orientation error, the interval orientation is adjusted.

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