Physical loop modeling method for intelligent substation drawing

A smart substation and physical loop technology, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve the problems of poor standardization of substation object legends, cumbersome and complicated operations, and no detailed introduction, so as to reduce the time spent on reading drawings Manpower and time, simple manual operation, and realize the effects of modeling and digitization

CN114547968APending Publication Date: 2022-05-27STATE GRID JIBEI ELECTRIC POWER COMPANY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-05-27

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Abstract

The invention discloses a physical loop modeling method for an intelligent substation drawing, and the method specifically comprises the steps: recognizing an electrical symbol of the drawing, and obtaining the primitive information of the drawing; then carrying out proportion normalization processing; constructing a topological connection relation character string according to the topological graph; solving an electrical symbol corresponding to the most similar topological character string through a character string similarity matching algorithm; extracting feature descriptors with distinguishing capability by using a statistical distribution method; training the data set by using a binary classification algorithm of GBDT and LR coupling training to obtain a classification model; and classifying the transformer substation model images according to the classification model to obtain transformer substation models forming a physical loop, and analyzing the connection relation of the transformer substation models to realize the construction of the physical loop model. According to the method, the aided design of the SPCD is completed, the manpower and time of drawing reading are reduced, modeling and digitization of a transformer substation drawing physical loop are realized, and the method has certain practical and reference values.
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Description

technical field

[0001] The invention belongs to the technical field of physical circuit modeling of intelligent substation drawings, and in particular relates to a physical circuit modeling method of intelligent substation drawings. Background technique

[0002] The degree of digitization of the preservation and analysis of the secondary original drawings of the substation is still not high, and the classification and identification of the drawings is becoming more and more complicated. Therefore, an intelligent way is used to assist the staff in classifying and identifying the drawings, extracting the key information of the drawings, and then providing the secondary system. Digital support is also more important. There are a large number of existing substations, and there is no standard specification for the physical circuit model of the secondary system. The design unit still expresses the design of the physical circuit through the optical cable contacting the original dra...

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Embodiment Construction

[0073] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0074] In order to illustrate the effectiveness of the method of the present invention, a single PDF substation secondary drawing is selected as a specific embodiment, and the specific method of the present invention includes the following steps:

[0075] 1. Identification of electrical symbols in drawings.

[0076] (1) Import the PDF drawing, convert it into a PNG image, and enlarge the image; then preprocess the image, segment the image of the substation model in the drawing, detect the primitives of the substation model image in turn, and obtain the primitive information of the drawing.

[0077] Since the logical or semantic structure of PDF cannot be read directly, the content needs to be obtained through complex transformation, and the accuracy is difficult to guarantee, so PDF is converted into PNG, and primitive info...