CN111611700A - Secondary system physical information modeling method based on transformer substation DWG drawing - Google Patents
Secondary system physical information modeling method based on transformer substation DWG drawing Download PDFInfo
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Abstract
The invention discloses a substation DWG drawing-based secondary system physical information modeling method, and belongs to the field of electric digital data processing. The method comprises the steps of firstly establishing a model primitive for secondary equipment in the DWG drawing, replacing the secondary equipment in the DWG drawing with the model primitive, increasing basic attributes, then establishing an information model for a connecting line, carrying out hierarchy recognition, and finally replacing the secondary equipment and the connecting line in the DWG drawing with the model primitive and a connecting cable according to the drawing, the hierarchy relation and the connecting relation to form a secondary system physical information model. According to the invention, secondary equipment in the DWG drawing is converted into digital model information, so that each professional data is further complete, the service value data is provided for the construction, debugging, operation and maintenance, reconstruction and extension of the transformer substation, a basic data platform is provided for constructing an intelligent operation and maintenance system, and the efficient and convenient guidance of on-site operation and maintenance work is realized.
Description
Technical Field
The invention belongs to the field of electrical digital data, and particularly relates to a secondary system physical information modeling method based on a transformer substation DWG drawing.
Background
The national network dispatching center provides an intelligent operation and maintenance system which is characterized by information equipment, automatic inspection and intelligent maintenance, and the relay protection operation level is comprehensively improved. At present, the secondary power system begins to present the characteristics of comprehensive digitization, networking, integration and informatization, and a transformer substation secondary drawing is used as an important basic technical material, covers the connection information of all components and circuits of the secondary power system of the transformer substation, is an important basis for on-site operation and maintenance, and realizes that the design of an object-oriented graph-model integrated transformer substation secondary system becomes a development trend.
However, at present, the substation secondary system is still handed over and works on site according to the principle of a design institute designed DWG format and an end-row drawing, the drawing of the DWG secondary electrical drawing is composed of figures, no specific significance is given to the drawing, the drawing is generally simply marked with numbers, models and the like beside the figures, no concept of an electrical primitive model exists, and the bearing and the application of data information cannot be achieved. The manual searching association is carried out among the plurality of drawings only by the end point numbers marked in the drawings, the drawing information is not clear enough when being checked in operation and maintenance work, time and labor are wasted, the judging and processing speed of the substation equipment faults is directly influenced, and the safe and stable operation of a power grid is related.
Disclosure of Invention
Therefore, in order to actively respond to the requirements of informatization and digitization, the invention provides a secondary system physical information modeling method of a transformer substation DWG drawing, which converts secondary equipment in the DWG drawing into digital model information, so that each professional data is further complete, the business value data is provided for transformer substation construction, debugging, operation and maintenance, reconstruction and extension, a basic data platform is provided for constructing an intelligent operation and maintenance system, and the efficient and convenient guidance of on-site operation and maintenance work is realized.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a secondary system physical information modeling method based on a transformer substation DWG drawing comprises the following steps:
the method comprises the following steps: establishing a model primitive for similar secondary equipment by referring to secondary equipment appearing in a DWG drawing of a transformer substation, wherein the model primitive is provided with basic attributes and relevance attributes, and the basic attributes comprise a graph number, an equipment name on the secondary equipment and an endpoint number unit;
step two: replacing the secondary equipment in the DWG drawing with the corresponding model primitive according to the figure number in the model primitive;
adding contents of basic attributes to the model primitive by using an automatic search matching method, wherein the basic attributes comprise equipment names and end point numbering units;
step four: modeling a connecting line on a DWG drawing as a connecting cable, wherein the connecting cable is provided with basic attributes and relevance attributes; the basic attribute comprises an endpoint numbering unit;
step five: identifying the hierarchical relationship between the secondary equipment and the connecting line in the DWG drawing, and adding the hierarchical relationship to the relevance attribute;
step six: and according to all DWG secondary electrical drawings of the total station, establishing a secondary system physical information model of the total station by using the model primitives and the connecting cables established in the steps and referring to the hierarchical relationship.
Preferably, the automatic search matching method in step three specifically operates as follows: taking the center of a target as the center of a circle and a circular range with the radius of 2mm as a search area, sequencing the searched characters according to the distance from the center of the circle, and taking the character closest to the center of the circle as the attribute of the target; if the distance sorting is the same, preferentially taking the characters above the target as attributes according to the drawing habit; if there is no text in the search area, the attribute needs to be manually added to the target.
Preferably, the specific method for modeling the connecting line as the connecting cable in the fourth step is as follows:
3-1, selecting a certain end point of the connection points, identifying along a fixed direction, firstly judging whether the connection line is a continuous solid line, and if so, executing 3-2; if not, identifying it as an annotation line, and not modeling;
3-2, continuing to recognize along the connecting line in the original direction, if the other end point of the connecting line is positioned on the model primitive, recognizing the end point number of the model primitive as the end point of the connecting cable, storing the end point number into the basic attribute of the connecting cable, and stopping recognizing; otherwise, executing 3-3;
3-3, identifying the end points according to the line type of the connecting line, specifically:
(1) when the connecting line is in a 'one' or 'L' shape, identifying the other end point of the connecting line as an end point, and executing 3-4;
(2) when the connecting line is in a T shape or n shape, identifying the intersection point between the lines as an end point, and executing 3-4;
(3) when the connecting line is in a cross shape, if the intersection point is a protruded solid point or a hollow point, the intersection point is identified as an end point, and 3-4 is executed; otherwise, judging that the two connecting lines are not intersected, and returning to the step 3-2 to continue to identify along the original direction;
and 3-4, artificially numbering the end points, storing the end points into basic attributes of the connecting cables, and stopping identification.
Preferably, the method for identifying the hierarchical relationship of the model primitive in the step five specifically includes: carrying out hierarchical classification according to the actual condition of secondary equipment, wherein the hierarchical classification comprises single device model primitives, screen cabinet model primitives and model primitives in the whole station; and adding the hierarchical classification name to the relevance attribute of the model primitive.
Preferably, the method for identifying the hierarchical relationship of the connecting lines in the step five specifically includes: carrying out hierarchical classification on the connecting lines according to different positions of the connecting lines, wherein the hierarchical classification comprises single-device internal connecting lines, screen cabinet internal connecting lines and screen cabinet inter-connecting lines; adding the hierarchical classification name to the relevance attribute of the connecting line; the different loops where the connecting lines are located are numbered and the numbers are added to the relevance attributes.
Preferably, the basic attributes of the model primitive further include a manufacturer; the connection cable also has basic properties including loop properties, number, model, destination location, and loop information including optical and electrical loops.
The technical effect obtained by adopting the technical scheme is as follows:
1. the existing DWG secondary electrical drawing is digitized and modeled, a model taking model primitives and connecting cables as objects is established, and data information bearing and application are achieved.
2. The secondary system of the transformer substation is graphically displayed, the connection information of an optical circuit and an electric circuit in the secondary system is clearly displayed, and a model foundation is laid for visual online monitoring of the full physical circuit and equipment of the secondary system.
3. The secondary drawings based on digitization and modeling can realize automatic association and jump among the drawings, provide related data information, greatly save the time for checking the drawings in operation and maintenance work, quickly recognize equipment, improve the operation and maintenance efficiency, and provide a basic data model for constructing an intelligent operation and maintenance system.
4. The full life cycle management and control of the secondary system data information are realized, and normalized model management and information storage are provided for each stage of design, acceptance, construction, debugging and operation.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of the modeling process of the connecting cable in step 3 of the present invention;
FIG. 3 is a model of the physical information of a secondary system of a trip circuit diagram established using the present invention;
fig. 4 is a secondary system physical information model of a current loop diagram established by the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the secondary system physical information modeling method based on the substation DWG drawing includes the following steps:
the method comprises the steps of firstly, establishing a model primitive for similar secondary equipment by referring to the secondary equipment appearing in a DWG drawing of a transformer substation, wherein the model primitive is provided with basic attributes and relevance attributes, and the basic attributes comprise a graph number, an equipment name on the secondary equipment and an endpoint number unit.
A screen cabinet and a device, an air switch, a pressure plate and the like in DWG drawing belong to secondary elements, and each secondary element has the characteristics that, for example, a normally open contact of a relay consists of a broken line and a straight line, the angle of the broken line is 90-180 degrees, the broken line and the straight line have no intersection point, and one side of the straight line and the broken line are positioned in the horizontal direction; the clamp plate comprises two circles and two straight lines, the circles are not intersected with the circles, the straight lines are located in parallel, each straight line and each circle are provided with one intersection point, and the total number of the intersection points is four.
Classifying secondary equipment related to all secondary systems, wherein the secondary equipment of the same type has some common characteristics, such as two end points of a normally open contact of a relay, which are respectively arranged at two ends of a straight line in the horizontal direction; the pressure plate is defined to have two end points, and the positions are respectively the middle points of the outer side contours of two circles in the intersected graph of the circle and the straight line.
The common characteristics of the similar devices are used as the basic attributes of the model graphic elements, wherein the basic attributes comprise a graph number, a device name on the secondary device and an endpoint number unit. The end point numbering unit is a unit of collective nature, and contains a plurality of elements, because each secondary element usually has a plurality of end points.
There are other attributes in addition to these three basic attributes, which are chosen to ensure that the model primitive can be built with minimal information. In order to make the contents of the model primitives richer and more accurate, the basic attributes can also be provided with the position relationship among the devices and the like. In actual application, the method can be selected according to the requirement.
And step two, replacing the secondary equipment in the DWG drawing with the corresponding model primitive by referring to the figure number in the model primitive.
In the step, secondary screen cabinets, secondary elements and the like of a secondary system in the transformer substation are converted into model primitives of the same type, and secondary equipment in the DWG drawing is replaced by the model primitives.
And thirdly, adding contents of basic attributes for the model graphic elements by using an automatic search matching method, wherein the basic attributes comprise equipment names and end point numbering units.
The automatic searching and matching method adopted in the invention adds the content of the basic attribute to the model primitive.
The automatic search matching method comprises the following specific operations: taking the center of the target as the center of a circle and a circular range with the radius of 20mm as a search area, sequencing the searched characters according to the distance from the center of the circle, and taking the character closest to the center of the circle as the attribute of the target; if the distance sorting is the same, preferentially taking the characters above the target as attributes according to the drawing habit; if there is no text in the search area, a name needs to be manually added to the target.
Here, the matching adopts fuzzy recognition matching. The target can be a model primitive or an endpoint on the model primitive.
As shown in fig. 3, for the normally open contacts of the relay in the trip circuit, a basic attribute information list is formed: the identified name "IJa" is listed in the device name, and the identified endpoint numbers "1, 2", etc. are added to the endpoint number unit. Other information of the normally open contact of the relay can be manually added to the relevance attribute, and the information comprises a board card number, card handling description, device number, device description, device type and the like.
Step four: modeling a connecting line on a DWG drawing as a connecting cable, wherein the connecting cable is provided with basic attributes and relevance attributes; the basic attribute includes an endpoint number element.
For the alternating current circuit, as shown in fig. 4, the terminal blocks 1-13 ID: 1, adding basic attribute information to the connecting line according to a connecting cable modeling informatization module. The different loops where the connecting lines are located are numbered and the numbers are added to the relevance attributes. The relevance attribute includes information such as a loop property, a loop number, a model number, a destination installation position, and the like.
The specific method for modeling the connecting line as the connecting cable is as follows:
3-1, selecting a certain end point of the connection points, identifying along a fixed direction, firstly judging whether the connection line is a continuous solid line, and if so, executing 3-2; if not, identifying it as an annotation line, and not modeling;
3-2, continuing to recognize along the connecting line in the original direction, if the other end point of the connecting line is positioned on the model primitive, recognizing the end point of the model primitive as a connecting end point, storing the end point number into the basic attribute of the connecting cable, and stopping recognizing; otherwise, the other end of the connection is still identified as the connecting line, so that the judgment is carried out according to the subsequent connecting line cross judgment principle, namely 3-3 is carried out;
3-3, identifying the end points according to the line type of the connecting line, specifically:
(1) when the connecting line is in a 'one' or 'L' shape, identifying the other end point of the connecting line as an end point, and executing 3-4;
(2) when the connecting line is in a T shape or n shape, identifying the intersection point between the lines as an end point, and executing 3-4;
(3) when the connecting lines are in a cross shape, if the intersection points are protruded solid points or hollow points, recognizing that one sides of the four connecting lines have a common end point, recognizing the intersection points as end points, and executing 3-4; otherwise, when the intersection point has no mark, the two connecting lines are identified as unconnected, and the step 3-2 is returned to continue to identify along the original direction;
and 3-4, because the end points between the connecting lines are not connected with the electrical primitives, the end point numbers cannot be automatically assigned, and the end point numbers need to be manually assigned and stored in the basic attributes of the connecting cables, and the identification is stopped.
In the process of identifying the end points, the connecting line is not directly connected with the model primitive, and if a small gap exists between the connecting line and the model primitive, when the gap is smaller than 0.1mm, the connecting line and the model primitive are judged to be in a connection relation.
Step five: and identifying the hierarchical relationship between the secondary equipment and the connecting line in the DWG drawing, and adding the hierarchical relationship to the relevance attribute.
Carrying out hierarchical classification according to the actual condition of secondary equipment, wherein the hierarchical classification comprises single device model primitives, screen cabinet model primitives and model primitives in the whole station; for the connecting wires, the classification conditions are similar, and the hierarchical classification comprises single-device internal connecting wires, screen cabinet internal connecting wires and screen cabinet internal connecting wires; and then adding the hierarchical classification name to the relevance attribute of the connecting line.
And in the subsequent modeling process, connecting the model primitives and the connecting cables according to the numbering relation by referring to the hierarchical relation.
And step six, according to all DWG secondary electrical drawings of the total station, establishing a secondary system physical information model of the total station by using the model primitives and the connecting cables established in the step and referring to the hierarchical relation.
And establishing model information taking the electrical primitives and the connecting lines as objects based on the electrical primitives and the connecting lines which are identified in the fourth step and classified hierarchically, obtaining the connecting information of all secondary systems, and establishing a secondary system model of the whole station.
Fig. 3 and 4 are physical information models of the secondary system established by the method of the invention.
The basic attributes of the model primitives also comprise manufacturers; the connection cable also has basic properties including loop properties, number, model, destination location, and loop information including optical and electrical loops.
In the invention, the model graphics primitive and the connecting line also have other accessory information, the accessory information comprises a manufacturer, a linear number and the like, and can be used as relevance information or accessory information to adapt to the working requirement.
The basic attribute and the relevance attribute mentioned in the invention have no strict division standard. The basic attribute is the minimum attribute required for modeling the secondary equipment into the model diagram element, so that the modeling workload is reduced. In practical engineering application, according to actual needs, a proper attribute is selected as a basic attribute or a relevance attribute.
Claims (6)
1. A secondary system physical information modeling method based on a transformer substation DWG drawing is characterized by comprising the following steps:
the method comprises the following steps: establishing a model primitive for similar secondary equipment by referring to secondary equipment appearing in a DWG drawing of a transformer substation, wherein the model primitive is provided with basic attributes and relevance attributes, and the basic attributes comprise a graph number, an equipment name on the secondary equipment and an endpoint number unit;
step two: replacing the secondary equipment in the DWG drawing with the corresponding model primitive according to the figure number in the model primitive;
adding contents of basic attributes to the model primitive by using an automatic search matching method, wherein the basic attributes comprise equipment names and end point numbering units;
step four: modeling a connecting line on a DWG drawing as a connecting cable, wherein the connecting cable is provided with basic attributes and relevance attributes; the basic attribute comprises an endpoint numbering unit;
step five: identifying the hierarchical relationship between the secondary equipment and the connecting line in the DWG drawing, and adding the hierarchical relationship to the relevance attribute;
step six: and according to all DWG secondary electrical drawings of the total station, establishing a secondary system physical information model of the total station by using the model primitives and the connecting cables established in the steps and referring to the hierarchical relationship.
2. The modeling method for the physical information of the secondary system based on the substation DWG drawing according to claim 1, characterized in that the automatic search matching method in the third step is specifically operated as follows: taking the center of a target as the center of a circle and a circular range with the radius of 2mm as a search area, sequencing the searched characters according to the distance from the center of the circle, and taking the character closest to the center of the circle as the attribute of the target; if the distance sorting is the same, preferentially taking the characters above the target as attributes according to the drawing habit; if there is no text in the search area, the attribute needs to be manually added to the target.
3. The modeling method for the physical information of the secondary system based on the DWG drawing of the transformer substation of claim 1, characterized in that the concrete method for modeling the connecting line into the connecting cable in the fourth step is as follows:
3-1, selecting a certain end point of the connection points, identifying along a fixed direction, firstly judging whether the connection line is a continuous solid line, and if so, executing 3-2; if not, identifying it as an annotation line, and not modeling;
3-2, continuing to recognize along the connecting line in the original direction, if the other end point of the connecting line is positioned on the model primitive, recognizing the end point number of the model primitive as the end point of the connecting cable, storing the end point number into the basic attribute of the connecting cable, and stopping recognizing; otherwise, executing 3-3;
3-3, identifying the end points according to the line type of the connecting line, specifically:
(1) when the connecting line is in a 'one' or 'L' shape, identifying the other end point of the connecting line as an end point, and executing 3-4;
(2) when the connecting line is in a T shape or n shape, identifying the intersection point between the lines as an end point, and executing 3-4;
(3) when the connecting line is in a cross shape, if the intersection point is a protruded solid point or a hollow point, the intersection point is identified as an end point, and 3-4 is executed; otherwise, judging that the two connecting lines are not intersected, and returning to the step 3-2 to continue to identify along the original direction;
and 3-4, artificially numbering the end points, storing the end points into basic attributes of the connecting cables, and stopping identification.
4. The secondary system physical information modeling method based on the substation DWG drawing according to claim 1, characterized in that the identification method of the hierarchical relationship of the model primitives in the fifth step is specifically as follows: carrying out hierarchical classification according to the actual condition of secondary equipment, wherein the hierarchical classification comprises single device model primitives, screen cabinet model primitives and model primitives in the whole station; and adding the hierarchical classification name to the relevance attribute of the model primitive.
5. The secondary system physical information modeling method based on the substation DWG drawing according to claim 1, characterized in that the identification method of the connection line hierarchical relationship in the fifth step is specifically as follows: carrying out hierarchical classification on the connecting lines according to different positions of the connecting lines, wherein the hierarchical classification comprises single-device internal connecting lines, screen cabinet internal connecting lines and screen cabinet inter-connecting lines; adding the hierarchical classification name to the relevance attribute of the connecting line; the different loops where the connecting lines are located are numbered and the numbers are added to the relevance attributes.
6. The modeling method for the physical information of the secondary system based on the substation DWG drawing of claim 1, characterized in that the basic attributes of the model primitive further include a manufacturer; the connection cable also has basic properties including loop properties, number, model, destination location, and loop information including optical and electrical loops.
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