1、 I 毕 业 设 计 题目:变电站电气一次初步设计题目:变电站电气一次初步设计 专业:电气工程自动化专业:电气工程自动化 指导老师:指导老师: 学生姓名:学生姓名: 2009 年年 12 月月 II 摘摘 要要 随着我国科学技术的发展,特别是计算机技术的进步,电力系统对变电站的 更要求也越来越高。 变电站作为电力系统中的重要组成部分, 直接影响整个电力系统的安全与经 济运行。本论文中待设计的变电站是一座降压变电站,在系统中起着汇聚和分配 电能的作用,担负着向该地区工厂、农村供电的重要任务。该变电站的建成,不 仅增强了当地电网的网络结构,而且为当地的工农业生产提供了足够的电能,从 而达到使本地区
2、电网安全、可靠、经济地运行的目的。 本论文首先通过对原始资料的分析及根据变电站的总负荷选择主变压器, 同 时根据主接线的经济可靠、运行灵活的要求,选择了两种待选主接线方案进行了 技术比较,淘汰较差的方案,确定了变电站电气主接线方案。 最后,绘制了电气主接线图等相关设计图纸。 关键词关键词 变电站;电气主接线设计;短路电流计算;电气设备选择;设计图纸 ABSTRACT With the development of science and technology in China, particularly computing technology has advanced, the power
3、system demands on substation more and more. Power system substation as an important part of the entire power system directly affects the safety and economic operation. To be designed in this paper is a step-down substation substation in the system plays the role of aggregation and distribution of el
4、ectric energy, charged with the factory to the region, the important task of rural electrification. The completion of the substation will not only strengthen the local power grid network structure, but also for the local industrial and agricultural production provides enough power, so that the regio
5、nal power grid so as to achieve safe, reliable and economic operation purposes. The paper the first original data through the analysis and selection based on total load of the substation main transformer, the main wiring under both economical and reliable, flexible operation requirements, select the
6、 main connection of two programs to be selected A technical comparison, out of poor program to determine the main electrical substation connection program. Finally, the main draw of the electrical wiring diagram, and other related design layout plan drawings. Keywords: Substation;Electrical main wiring design; Short-circuit current calculation;Electrical equipment selection; Design drawings 1 前前 言言 变电站的设计是一门综合性科学,它是多种专业有机配合,密切协作下完成 的一个整体,毕业设计作为我们的一个学习内容,它不仅是我们三年理论学习的 一个综合考验,也是提高我们的自学能力、熟悉设计程序并