Abstract: There are many restrictive factors in the route selection of power transmission and transformation projects, which are obviously affected by the environment. The traditional 2D map selection combined with on-site survey work is not only time-consuming and labor-intensive, but also cannot fully grasp the natural conditions on the route, making it difficult to guarantee the selection effect. This paper studies the route selection planning of power transmission and transformation projects using 3D real scene technology. It provides a new idea for scientific and rational route selection by carrying out selection range constraints, line plotting and simulation in real geographic scenes, combined with spatial analysis technology to assist in the comparison of planning scheme. During the construction of Huangbuling 500kV project, practices show that the 3D real scene with its real, three-dimensional and intuitive expression advantages can not only improve the efficiency and quality of route selection, but also possible to carry out landscape visual impact analysis on special route such as crossing scenic spots to provide scientific and objective decision-making reference for scheme comparison and demonstration, which is an in-depth empowerment for digital transmission route selection.

Key words: 3D real scene, power transmission and transformation project, route selection planning, visual analysis