摘要

本文是对某商贸楼建筑的供配电系统设计的全面阐述。该建筑高度为33米，地下一层，设有车库、消防控制室、变配电室、柴油发电机房和会议室，地上九层则为各部门办公室、会议室和接待室等。本文主要围绕供配电系统、柴油发电机房、照明系统、动力系统和防雷接地系统等部分展开设计。

在供配电系统设计中，通过收集相关资料和参考规范，利用需要系数法和单位指标法进行负荷统计，计算出各回路的计算电流。随后，根据计算结果选择各级开关电器型号，并按照一定折扣选择导线和母线截面。此外，还对高、低压侧的短路电流进行了计算，并对各种开关电器、电缆和母线进行了校验。照明设计部分，通过计算房间所需灯具数量和间距，确定了灯具布置方案。在防雷接地设计中，根据建筑物的防雷等级，设计了屋顶避雷带和负一层接地系统。

此外，还对电气安全问题进行了简要介绍。本文旨在为类似商贸楼的电气设计提供参考和指导，为实际工程应用提供依据。

关键字：配电系统；供电系统；负荷计算；短路电流；照明设计

ABSTRACT

This paper is a comprehensive elaboration of the power supply and distribution system design of a commercial building. The building height is 33 meters, the first floor underground, with a garage, fire control room, transformer and distribution room, diesel generator room and conference room, the ninth floor are offices, conference rooms, and reception rooms. This paper mainly focuses on the power supply and distribution system, diesel generator room, lighting system, power system and lightning protection grounding system.

In the design of the power supply and distribution system, the calculating current of each circuit is calculated by collecting relevant data and reference specifications. Then, according to the results of the calculation, and select the wire and bus section according to a certain discount. In addition, the short circuit current on the high and low voltage sides is calculated, and various switching appliances, cables and bus bars are checked. In the lighting design part, the layout schemes of the lamps and lanterns are determined by calculating the number and spacing of the lamps required in the room. In the lightning protection grounding design, according to the lightning protection level of the building, the roof lightning protection belt and a negative layer of grounding system are designed. In addition, the electrical safety issues are also briefly introduced.

This paper aims to provide reference and guidance for the electrical design of similar commercial buildings, and to provide a basis for practical engineering application.