毕业论文--某小区商住楼电气工程设计.doc

毕业设计（论文） 某小区商住楼电气工程设计 摘 要 该论文主要阐述了某住宅小区两栋18层、一栋11层单体住宅楼的电气系统设计，包括设计依据、原则、方法、过程与结论。本论文的设计为项目的强电部分，分为五章，第二、三章为低压配电部分，第四、五章为现场设计部分。主要内容有：低压配电系统、照明系统及防雷接地系统的设计，其中包括负荷计算，低压配电方式，短路电流计算，设备选择与校验，过电流保护整定，过压保护设置，变配电所设计,确定住户配电设计，住宅公共部分照明与照明控制设计,楼防雷系统设计等。本次对某住宅小区楼的建筑电气毕业设计，旨在运用所学的电工理论知识，联系实际，通过自身的设计实践，掌握建筑电气设计的一般步骤、方法，并能够对工程中的某些问题进行分析和解决，为今后从事建筑电气工作打下良好基础。 关键词:电气设计,供配电系统,照明,防雷  ABSTRACT This paper mainly describes the electrical system of two 18-floor residential buildings and an 11-floor one, including its basis for electrical design, principles, methods and conclusion for design choices. The paper is designed for electric power and is divided into five chapters, with the second and third chapters about low voltage distribution and the fourth and fifth chapters about site design. The paper mainly covers topics on low voltage distribution system, short circuit current computation, equipment selection and calibration, overcurrent protection setting, overvoltage protection setting, substation and distribution station designing, household distribution design, design for public part of the lightening and its control in residential building, design for lightening protection system etc. The graduating design for the electrical system in the residential building aims to apply the theoretical knowledge from class and put it into practice. Through the practical designing process, the regular approaches and methods for electrical design in buildings can be better grasped and the engineering problems can be analyzed and solved. It lays a strong foundation for a career in electrical designing in the future. Key words：Electrical design, Electric power supply and distribution system, Lighting, Lightning protection 目 录 中文摘要 Ⅰ ABSTRACT Ⅱ 1绪论 1 1.1课题意义 1 1.2课题基本情况 1 1.3外部条件 2 2低压配电系统设计 3 2.1变配电所选址及符合等级 3 2.1.1配电的设计概述 3 2.1.2变配电所选址 3 2.1.3负荷分级及供电要求 3 2.2 供配电系统接线设计 5 2.2.1 变配电所主接线选择 5 2.2.2 低压配电干线方案设计 5 2.3 负荷计算 7 2.3.1需要系数法 7 2.3.2 计算实例 8 2.4 线缆初选 11 2.4.1 线缆类型选择 11 2.4.2 电缆截面积选择 11