1、 摘 要 本设计是某高层行政中心的建筑电气设计，建筑物高 33 米，地下一层，其主 要有车库、消防控制室、变配电室、柴油发电机房和几个较大的会议室。地上九 层，主要为各部门办公室、会议室、接待室等。 由于建筑电气的设计涉及的范围很广，本次毕业设计仅对大楼电气设计的部 分主要内容进行设计，主要包括供配电系统设计、柴油发电机房设计、大楼部分 照明设计、部分动力设计、防雷接地设计。 在对大楼进行设计前，先收集了相关的资料和参阅了相关的规范。在负荷统 计过程利用了需要系数法、单位指标法等方法，再计算出各回路的计算电流，选 取各级开关电器的型号，然后再按一定折扣选择导线的截面和母线的截面，接着 计算出高
2、、低压侧的短路电流，最后完成各种开关电器、电缆和母线的校验。在进 行照明设计时，先对了一个房间计算了其需要的灯具数目，确定了灯具间的间距， 以此来对其他房间进行布置灯具。在进行防雷接地设计时，先确定了其防雷等级， 再对屋顶进行了避雷带的设计和负一层接地设计。最后介绍了一些电气安全的相 关问题。 关键字：关键字：负荷计算，短路电流，照明 课件之家精心整理资料-欢迎你的欣赏 ABSTRACT This Project is the electricity design for a government building. This building is 46.2m high, and the a
3、rea is about 20000m2. It has one layer underground, which has a garage, and some conference rooms. There are same rooms for power distribution, fire control, diesel generating set and so on. The electricity design for a building involves many subjects, so I only design the main parts of the electric
4、ity design for the government building. I design the systems of the power distribution, the arrangement plan of the room of diesel generating set, the grading, the dynamic force of the building and the grounding for lightening. Before I design the electricity for the government building, I read many
5、 standards of the electricity design and all of the information of the government building. I make use of the demand coefficient method and use the unit index sign method to statistics the load. I compute the load current of each circuit and select the levels of all switches, then press certain disc
6、ount choice to select the sectional area of each wire and bus bar. Later, I compute the short-circuit currents of the high-tension lines and the low lines. I also check the reliabilities of some switches, wires and bus bars to assurance the safety of the system. When designing the system of the grading, I choose a room to know the distance of two lamps. Then, I calculate the number of the lamp in the room. Last, I check the illumination of the room. When designing the system of the grading of
