Automatic modeling method and system for cable trench joint in three-dimensional design of transformer substation

The invention discloses an automatic modeling method and system for a cable trench joint in three-dimensional design of a transformer substation. A three-dimensional modeling technology is applied toa power cable underground laying project, and the problem of real display of the cable trench model in the transformer substation is solved; the cable trench in the transformer substation belongs to ahidden part, yet visualization of hidden engineering is achieved by the invention, so designers can clearly, timely and accurately correct errors of their own design from space imagination, thus theerror rate is reduced, and the design efficiency is improved. Moreover, the positions of the cable trench and the joint in the scene are positioned by segmenting an object in the 3D scene of the transformer substation, the distance between the cable trench and the joint is adjusted through an optimization algorithm, and accurate modeling is performed on the joint of the cable trench. The three-dimensional automatic modeling