CN112395721A - Rapid drawing modeling method suitable for power distribution network - Google Patents
Rapid drawing modeling method suitable for power distribution network Download PDFInfo
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Abstract
The invention discloses a rapid drawing modeling method suitable for a power distribution network, and belongs to the technical field of calculation, calculation or counting. The specific method and the steps of the rapid drawing modeling method for the power distribution network are as follows: constructing a model database which meets the analysis application requirements of the power distribution network and is convenient to expand by using an object-oriented modeling idea; rapidly drawing an electrical wiring diagram in an SVG format according to the wiring mode description of the power distribution network; automatically performing graph-model association according to the automatically drawn primitive information; generating node number information of the model according to the graph connection relation; and writing the model record associated with the graph model information into a model database, automatically generating an attribute and a measurement record according to the attribute corresponding to the equipment type and the measurement configuration, and modifying the node information in the model database according to the node number information of the model. The invention can rapidly draw the electrical wiring diagram according to the wiring mode description of the electrical wiring diagram, and can adapt to the expansion requirement of new equipment types without modifying the database structure.
Description
Technical Field
The invention relates to the electric power engineering technology, in particular to a rapid drawing modeling method suitable for a power distribution network, and belongs to the technical field of calculation, calculation or counting.
Background
The power distribution network drawing modeling is a core link of a plurality of application software of the power system. Whether the online monitoring of a distribution automation system or the planning of a distribution network, off-line application systems such as distribution network simulation analysis and various data display depend on an electrical wiring diagram, and various analysis applications depend on a power network model, so that the drawing and modeling of the distribution network in a system related to the distribution network are extremely important links.
At present, the existing power distribution network drawing modeling mainly has two modes: the first is drawing modeling, which comprises the following main steps: recording model data in a database, drawing primitives in a drawing tool and associating the model data in the database, drawing connecting lines according to an actual topological relation, and generating topological data of the model according to the connecting lines, wherein under the condition that graphs are complex, the input data and the graph drawing workload are very large, and the manual drawing of the connecting lines is long in time consumption and easy to make mistakes; the second method is to automatically generate graphics according to the model, which can save manpower for drawing, but needs to import the model through an external system. At present, a distribution automation system can obtain a model through a PMS system and then automatically map on the side of a distribution network main station, but in an area without the PMS system, an incremental distribution network and an industrial park distribution network, modeling is still needed in the distribution automation system.
The database of the traditional distribution automation system is established according to the device type sub-table and is used for recording various types of devices in the distribution network system according to the established data during drawing. For the power distribution network with the increasingly larger scale, when the data of the model is recorded by adopting the data path of the traditional power distribution automation system, the database comprises a plurality of data tables, so that the defect of data overstock exists, and the speed and the usability of drawing modeling are influenced. When an unknown equipment type is encountered, the database structure of the traditional distribution automation system needs to be modified in a way of adding tables or fields, and the modification of the database structure belongs to major modification in system software, so that the complexity of system maintenance is increased, the modeling speed is influenced, and the requirement of the expansibility of modeling is difficult to meet.
The method aims to establish a database capable of fully utilizing the existing equipment attributes through an object-oriented modeling technology on the basis of the existing distribution network model description and on the premise of meeting the analysis application requirements of the distribution network, and quickly establishes the distribution network model by combining an automatic drawing technology so as to meet the requirements of the distribution network model on the aspects of operation monitoring, simulation analysis, planning and research of the distribution network and the like.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, provides a rapid drawing and modeling method suitable for a power distribution network, constructs a model database which meets the analysis and application requirements of the power distribution network and is convenient to expand by utilizing an object-oriented modeling idea, describes rapid drawing according to a wiring mode, and inputs model information according to automatically drawn graphic information to form a container relation and a connection relation corresponding to a model, thereby solving the technical problems that the existing drawing and modeling method has large workload for inputting data and drawing graphics, and the traditional power distribution automation system database is difficult to meet the requirements of rapid modeling and is easy to expand.
The invention adopts the following technical scheme for realizing the aim of the invention: a rapid drawing modeling method for a power distribution network constructs a database structure which meets the analysis application requirements of the power distribution network and can be flexibly expanded by modeling in an object-oriented mode; and rapidly drawing an electrical wiring diagram according to the wiring mode description by adopting a drawing method of thinning from macro to micro level by level. The rapid drawing modeling method comprises the following steps:
(1) creating a model database: constructing a model database which meets the analysis application requirements of the power distribution network and is convenient to expand by utilizing an object-oriented modeling idea;
(2) fast drawing: rapidly drawing an electrical wiring diagram in an SVG format according to the wiring mode description of the power distribution network;
(3) and (3) associating graph model information: automatically performing graph-model association according to the automatically drawn primitive information;
(4) and (3) generating a connection relation: generating node number information of the model according to the graph connection relation;
(5) and (4) warehousing the model: and writing the model record associated with the graph meta information into a model database, automatically generating an attribute and a measurement record according to the attribute corresponding to the equipment type and the measurement configuration, and modifying the node information in the model database according to the node number information of the model.
The invention further discloses the following preferable technical scheme:
in the step (1), a relational database modeling mode used by a general system (such as a distribution automation system) is not adopted, because new equipment types of a distribution network frequently appear, and the relational database frequently changes and is inconvenient to expand, the method adopts an object-oriented modeling mode to construct a model database with six core data tables, and the new equipment types can be realized by adding new attributes and measurements on the basis of the old equipment types in an inheritance mode, namely by additionally recording in corresponding tables. The six core tables are respectively: the device comprises a device table, a device attribute table, a device measurement table, a device type definition table, an attribute type definition table and a measurement type definition table.
Equipment table: all device information (including device containers) for the entire grid is stored in this table, with the main fields: ID (key), name, device type (pointing to device type definition table ID), number of nodes, node 0 number, node 1 number, node 2 number.
Device attribute table: all attributes of all devices of the whole power grid are stored in the table, and the main fields are as follows: ID (key), device type (pointing to attribute type definition table ID), attribute value.
The device measurement table stores the measurement of all basic types of devices of the whole power grid, and the main fields are as follows: ID (key), device type (pointing to measurement type definition table ID), measurement value, unit.
Device type definition table: defining the types of all the devices and the inheritance relationship among the types, and defining the drawing components corresponding to the devices of various types, wherein the main fields are as follows: ID (key, character type), name, parent ID.
Attribute type definition table: defining which attributes each type of device has, the main fields are: ID (key, character type), name, device type (pointing to device type definition table ID).
A measurement type definition table, which defines which measurement types each type of device has, ID (key, character), name, device type (pointing to device type definition table ID).
The principle of the type of the newly added equipment is as follows: if the newly-added equipment does not have the same attribute with the existing equipment, the newly-added equipment type is considered to be not associated with the existing equipment type, a record is added into an equipment type definition table, a corresponding attribute name and a corresponding measurement type are added into the attribute type definition table and the measurement type definition table, and own data of the newly-added equipment, such as the unique attribute name and the measurement type of the newly-added equipment, can be added into the attribute type definition table and the measurement type definition table according to the requirement; if the newly added device type is inherited from the currently existing device type, a record is added into the device type definition table and the parent ID of the record is modified into the inherited device type ID.
The specific process of newly adding equipment is as follows: adding a record in the equipment table, acquiring an attribute record from the attribute type definition table according to the equipment type, adding the attribute record into the equipment attribute table, acquiring the attribute record from the measurement type definition table according to the equipment type, and adding the attribute record into the equipment measurement table, wherein the specific steps are as follows: and acquiring all father IDs of the current equipment according to the equipment type definition table, and adding the attribute records and the measurement records of the equipment types corresponding to the father IDs into the equipment attribute table and the equipment measurement table.
In step (2), the rapid drawing method is a drawing method from macro to micro: firstly, determining the wiring mode of a trunk line, then determining the wiring mode of a branch line, and generating a graphic layout file according to the description of all wiring relations; and generating an electrical wiring diagram of the SVG by the drawing software according to the graphic layout file for displaying and applying by other systems.
In order to facilitate the input of drawing information, the invention adopts a layout and wiring method based on matrixing. The distribution line is subjected to matrix division to obtain a plurality of cells, wiring of equipment in the cells is firstly carried out, and then wiring among the cells is drawn according to the matrix adjacency relation of the cells.
A distribution line composition apparatus comprising: the method comprises the steps that a power point (a feeder substation outlet switch), a section switch, a branch switch, a load, a ring main unit, a T joint and a feeder section are used, the feeder section is used as a connection between cells, the other feeder sections are used as the cells, cell information is recorded according to matrix arrangement, and a connecting line (namely the feeder section) exists between every two adjacent cells in each row of a matrix, but the connecting line does not exist between every two adjacent cells in the matrix. For a T-junction, a connecting line (i.e., a feeder line segment) is considered to be present between the rows and columns.
And forming graphic primitives required by drawing according to the layout information of the cells in the matrix, wherein the graphic primitives comprise components, terminals, connecting lines and the like. And calculating corresponding drawing coordinates according to the positions of the cells in the matrix, and drawing. And renaming the graphic elements according to personal habits after drawing.
And (3) automatically performing model matching association according to the graphic element information of the graph drawn in the step (2). For terminal primitives, the model is not matched; for the connecting line, if the connecting line in the components is matched with the model, if the connecting line between the components is matched with the model, the connecting line is matched into a feeder line section; and (3) for the components, automatically matching the corresponding model types according to the contents of the device type definition table in the step (1). And after matching is successful, writing the record into the device table. And (3) generating fields of ID (key word), name and device type (pointing to the device type definition table ID) in the device table in the step (1).
And after the model types are matched, generating corresponding model information. And recording the keywords of the model information in the attributes of the primitives to realize the graph-model association. After the model is associated, the primitives can be renamed according to personal habits.
In step (4), on the basis of the SVG graphics generated in step (2), generating a device connection relation according to a primitive space coordinate relation: the method mainly comprises the steps of representing the relation between a connecting line and a primitive terminal, generating the corresponding relation between equipment and a node number according to the relation of a graphic connecting line and equipment information associated with a primitive, and writing the corresponding relation into an equipment table.
The principle of generating the node numbers is as follows: the primitives are all composed of one or more terminals, and the principle of generating node numbers is as follows: each primitive terminal generates a node number, and the node numbers corresponding to the terminals connected together by the connecting lines of the unrelated devices are the same. And (3) after the nodes are generated, updating the fields of the node number, the node 0 number, the node 1 number and the node 2 number in the equipment table in the step (1).
In step (5), on the basis of step (3) and step (4). According to the device attribute template and the device measurement type template, for a specified device type, all father ID device types are obtained according to a device type definition table, records of a device attribute table and a device measurement table in a model database are generated according to attributes and measurements corresponding to all the father ID device types, and meanwhile information such as model names and attribute values are modified.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the method comprises the steps of establishing a database for inputting model data by adopting an object-oriented modeling technology, establishing a data structure of newly-added equipment by inheriting the same attribute data of the existing equipment, establishing equipment corresponding to primitives by a matrixing layout wiring method, inputting the model data into the database after the generation of graph-model information association and connection relation is completed, and quickly establishing a distribution network graph model from scratch, so that the quick drawing of an electrical wiring diagram is realized.
(2) The database constructed by the method can quickly input the data of the newly added equipment by reading the data with the same attribute from the existing equipment data, the new equipment type can be added without modifying the structure of the database, and the requirements of easiness in use and expansibility of drawing modeling can be met.
Drawings
FIG. 1 is a diagram illustrating the data relationship of the model database constructed according to the present invention.
FIG. 2 is a flow chart of a rapid graphical modeling method disclosed herein.
Fig. 3 is a wiring diagram of a three-connection power distribution network in the embodiment of the present application.
Detailed Description
The technical scheme of the invention is explained in detail in the following with reference to the attached drawings.
The invention discloses a rapid drawing modeling method suitable for a power distribution network, which comprises the following steps as shown in figure 2:
(1) creating a model database: constructing a model database which meets the analysis application requirements of the power distribution network and is convenient to expand by utilizing an object-oriented modeling idea;
(2) fast drawing: rapidly drawing an electrical wiring diagram in an SVG format according to the wiring mode description of the power distribution network;
(3) and (3) associating graph model information: automatically performing graph-model association according to the automatically drawn primitive information;
(4) and (3) generating a connection relation: generating node number information of the model according to the graph connection relation;
(5) and (4) warehousing the model: and writing the model record associated with the graph model information into a model database, automatically generating an attribute and a measurement record according to the attribute corresponding to the equipment type and the measurement configuration, and modifying the node information in the model database according to the node number information of the model. Fig. 3 is an example of a specific triple-network distribution network, which is a ring network composed of three feeders of three power supply points, i.e., S1, S2 and S3. CB1, CB2 and CB3 are substation outgoing line switches of three feeder lines, BS1, BS2 and BS3 are corresponding substation buses, which is equivalent to S1 consisting of BS1+ CB1, S2 consisting of BS2+ CB2, S3 consisting of BS3+ CB3, FB1, FB2, FB3, FB4, FB5 and FB6 are feeder line section switches, LL1 and LL2 are feeder line interconnection switches, and LD1, LD2, LD3, LD4, LD5, LD6, LD7 and LD8 are load devices. T1 and T2 are two nodes.
By combining the data structure shown in fig. 1 and the flow of the drawing modeling method shown in fig. 2, the drawing modeling process of the triple-network power distribution network shown in fig. 3 is exemplarily described, and the specific implementation steps are as follows:
(1) the model database was built according to the structure of fig. 1.
(2) According to the wiring relation of FIG. 3, matrix entry is performed, the matrix only needs to be entered with specific types, and the matrix content is as follows:
| S | LD | CB | LD | CB | T | CB | LD | CB | LD | CB | LD | S |
| T | CB | LD | CB | LD | CB | LD | S |
drawing and wiring are performed according to the matrix information. For convenience of the following description, it is assumed that the primitive names are modified as shown in fig. 3 after drawing. The connection lines are formed according to the connection relationship of the matrix, and in this example, in addition to the connection lines formed between the cells, there are also connection lines between the bus bars and the switches inside the three power supply points,. p0,. p1 … denotes terminals of the picture elements, and the name of the connection line is composed of "head end terminal-end terminal".
(3) And generating a correlation model of the primitive according to the matrix primitive information and the connecting line. The power supply point internal connecting lines BS1-CB1.p0, BS2-CB2.p0 and BS3-CB3.p0 are not related to a model.
(4) The node number is generated according to the relationship between the connection terminal terminals, and for this example, one node number is generated for each load point (LD) and T node. Each section switch (CB) generates two node numbers, each power supply point S generates two node numbers, the outgoing line switch FB generates two node numbers, a node number of the substation bus BS is consistent with one of the two node numbers of the FB, and after the creation of the model basic information is completed, the data shown in the table 1 are formed. (only some of the model data are listed here, and the rest is similar and will not be described again).
(5) And generating a device attribute table and a record of a device measurement table in the model database according to the device attribute template and the device measurement type template.
Table 1 model information table.
Claims (8)
1. A rapid drawing modeling method suitable for a power distribution network is characterized by comprising the following steps:
s1, building a model database by using the object-oriented modeling idea, wherein the database comprises: the device comprises a device table, a device attribute table, a device measurement table, a device type definition table, an attribute type definition table and a measurement type definition table, wherein fields of the device table comprise: ID. Name, device type, number of nodes, node number, the fields of the device attribute table contain: ID. The device type, attribute value, the field of the said device measurement table contains: ID. The device type definition table is used for defining drawing components corresponding to various types of devices, and the fields comprise: ID. Name, father ID, the fields of the attribute type definition table contain: ID. Name, equipment type, the fields of the measurement type definition table include: ID. Name, device type, the device type arrays of the device table, attribute type definition table, measurement type definition table all point to a device type definition table ID, the device type array of the device attribute table points to an attribute type definition table ID, the device type array of the device measurement table points to a measurement type definition table ID,
s2, drawing an electrical wiring diagram in an SVG format by adopting a matrix-based layout and wiring method;
s3, carrying out graph-model association according to the primitive information of the drawn electrical wiring graph to obtain equipment type definition information of a model associated with the primitive;
s4, generating node number information of the association model according to the primitive space coordinate relation;
and S5, writing the model associated with the primitive information into a database according to a matrix arrangement mode, inputting attribute information and measurement information according to the attribute type and the measurement type corresponding to the equipment type, and modifying the node information in the database according to the node number information of the associated model.
2. The method according to claim 1, wherein when the newly added device has no same attribute as the existing device, the ID and name of the newly added device are added to a device type definition table, and the corresponding attribute name and measurement type are added to an attribute type definition table and a measurement type definition table; and when the newly added device and the existing device have the same attribute, modifying the father ID of the newly added device into the device type ID with the same attribute as the newly added device by the ID and the name of the newly added device in the device type definition table.
3. The rapid drawing modeling method for the power distribution network according to claim 1, wherein the step S2 is a specific method for drawing the electrical wiring diagram in SVG format by using a matrix-based layout and wiring method, and comprises the following steps: the method comprises the steps of performing matrix division on the distribution line according to the connection relation of each device in the distribution line to obtain unit grids connected through feeder line sections, forming primitives required by drawing according to layout information of the unit grids, performing device wiring in the primitives, calculating drawing coordinates according to the positions of the unit grids, drawing the primitives at the drawing coordinates and completing connection lines among the primitives, and storing a drawn electrical wiring diagram as a graphic file in an SVG format.
4. The method for rapid drawing and modeling of the power distribution network according to claim 1, wherein the step S3 includes a specific method for performing graph-model association according to primitive information of drawing an electrical wiring diagram: and matching connecting lines among the assembly primitives into feeder segments, matching the equipment types of the assembly primitives according to the information of the equipment type definition table in the database, and generating equipment table information according to the equipment types obtained through matching.
5. The method as claimed in claim 1, wherein in step S4, the connection relationship of the association model is generated according to the primitive space coordinate relationship, the connection relationship of the association model is written into the device table, and the node number information is generated according to a principle that each terminal primitive generates a node number and the node numbers corresponding to the terminals connected by the connection lines of the unassociated model are the same.
6. The rapid drawing modeling method for the power distribution network according to claim 1, wherein the specific method for entering the attribute information and the measurement information according to the attribute type and the measurement type corresponding to the device type in step S5 is as follows: and reading all father ID equipment types of the current input model according to the equipment type definition table, and generating an equipment attribute table and an equipment measuring table according to the attribute definition table and the measuring definition table corresponding to all the father ID equipment types.
7. The method according to claim 3, wherein before saving the rendered electrical wiring diagram as a graphic file in SVG format in step S2, the method further comprises the step of manually modifying the drawing.
8. The method for rapid graphical modeling for power distribution networks according to claim 1, wherein an XML file is generated according to the information entered into the database in step S5.
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| CN117077642A (en) * | 2023-10-17 | 2023-11-17 | 东南大学建筑设计研究院有限公司 | Automatic drawing method for power substation power transformation and distribution system diagram based on VBA programming |
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