Abstract
In order to solve the problem of inconsistent modeling depth and uneven model granularity in the 3D modeling process of power grid engineering, this paper analyzes the fineness requirements of 3D models at all stages of engineering. Referring to the LOD rule of the US National BIM Standard, three-dimensional model fineness guidance for electrical equipment in substations (commutation stations) is developed and the model fineness is divided into two fineness levels, including the general model and the product model. The feasibility of the guidance is verified by actual engineering.
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