Physical loop modeling method for intelligent substation drawing

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.

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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Problems solved by technology

[0004] Chinese patent CN110795809A[7] discloses a method for automatically picking up the connection relationship of substation electrical secondary circuits based on CAD drawings. According to the establishment of the secondary element library, the automatic selection of the size of the recognition area frame, and the identification of the graphics in the area frame Automatic comparison with the secondary component library to identify various components in the CAD drawing of the electrical secondary circuit, relying on the position coordinates of the connection points of the connection line and the positional relationship of the components to obtain the connection relationship of the electrical secondary circuit in the CAD drawing, and finally can Output the standard file describing the connection relationship of the electrical secondary circuit of the substation, and complete the extraction of the secondary circuit of the substation drawing, but there is no detailed introduction in the article on how to match the electrical symbols, and most of the operations need to manually select objects and set the size of the graphics, which is cumbersome and complicated

[0011] The current research is mainly applied to the CAD diagram of the connection relationship of component symbols similar to circuit diagrams. It does not involve the analysis of the connection relationship between the physical circuit equipment objects in the secondary drawing of the substation. A rectangular combination describes the device area, and a straight line describes the connection model

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