基于BIM的接地网系统设计与电气仿真

Design of BIM-Based Ground Grid System and Electric Simulation

作为电气安全的重要手段之一,接地网在建筑中扮演了重要且必不可少的角色。在现实建筑设计中,接地网的设计和建筑本身的设计被分割为两个独立和割裂的设计过程。割裂的设计过程使得接地网的设计常常无法充分考虑建筑的特殊需求,特别是新能源建筑如一体化光伏建筑带来的新的需求。提出一个基于建筑信息模型（building information model,BIM）的建筑接地网统一设计平台,在BIM平台实现了对接地网的设计、计算的一体化服务。构建了基于BIM模型的接地网相关的设备模型,充分利用基于BIM的建筑3D模型、电气设备信息、线路模型来精确地计算系统最大短路电流。在此基础上,通过获取的建筑接地网的信息和土壤模型,实现了基于有限元算法的接地网计算,计算结果直接以3D形式呈现在建筑信息模型中。该平台已经应用在一个光伏建筑的接地网设计中,获得了较好的效果。

As one of the key electrical safety measurements,grounding grid plays an important role in the architecture.In the process of practical architectural design,grounding grid design and architectural design are completely separated into two independent design processes.This seperation prevents the design of grounding grid from being able to take full consideration of the complexrequirements of architecture,especially the new requirements brought by new energy buildings such as the photovoltaic building（building information photovoltaic,BIPV）.This paper presents a uniform BIM-based grounding grid design platform,which provides the integrative services of grounding grid design and calculation.Equipment models related to BIM-based grounding grid were made and the accurate maximum short circuit current of system was calculated by fully utilizing the BIM-based 3D models,electrical models and transmission line models.Accurate electrical topology can be built based on the BIM model.Based on such information,the calculation of grounding grid based on finite elements was realized via the information and soil model of building grounding grid acquired and the calculated results directly displayed in BIM（building information model,BIM）in the form of 3D.This platform has been used practically in designing a grounding grid of a Building Integrated Photovoltaic（BIPV）and good application results have been achieved.