Three-dimensional live-action modeling method for overhead transmission line based on point cloud data fitting

The invention discloses an overhead transmission line three-dimensional live-action modeling method based on point cloud data fitting. The method comprises the following steps of data acquisition, point cloud data processing, Halawatt measurement, point cloud fitting, tower parameter extraction, wire modeling, finite element analysis, tower line coupling analysis and live-action modeling. According to the method, large-scale point cloud data can be efficiently and accurately obtained through the airborne laser radar, the large-scale point cloud data comprise pole and tower information, wire information and topographic information of the power transmission line, and the point cloud data obtained through the airborne laser radar measurement technology has high precision and density; according to the method, detail information such as a tower structure, a lead position and topographic relief can be accurately captured, more accurate and comprehensive data can be provided compared with manual measurement or aeria