35KV石化厂变电所一次部分设计论文.doc

摘 要 变电站是电力系统的一个重要组成部分，由电器设备及配电网络按一定的接线方式所构成，他从电力系统取得电能，通过其变换、分配、输送与保护等功能，然后将电能安全、可靠、经济的输送到每一个用电设备的转设场所。作为电能传输与控制的枢纽，变电站必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。 35KV石化厂变电所是现在主要的小型变电所。本次我设计的35KV变电所采用的是单母分段内桥接线方式，这种接线方式有较好的经济性和较高的可靠性。由于有两个场有一级负荷，因此两个供电所用变压器采用的是35KV进线和10KV母线上各一个。本文中我进行了变压器的选择，短路电流计算，送配电网络及导线的选择，变电站高低压电气设备的选择。本变电所的初步设计包括了：（1）总体方案的确定；（2）负荷分析;（3）短路电流的计算;（4）防雷与接地保护等内容。 关键词：变电站；负荷；输电系统；配电系统 Abstract The substation is an importance part of the electric power system, it is consisted of the electric appliances equipments and the Transmission and the Distribution. It obtains the electric power from the electric power system, through its function of transformation and assign, transport and safety. Then transport the power to every place with safe, dependable, and economical. 35 kv substation petrochemical factory is the main small substation now.I design the 35 kv substation uses a single bus with inside bridge connection mode,This kind of connection mode has better efficiency and higher reliability.Because there are two fields have level 1 load,the two power substation uses two transformerHYPERLINK app:addword:transformers in 35 kv line into and 10 kv line into respectivelyHYPERLINK app:addword:respectively. In this article I made the choice of the transformer ，calculate the short-circuit electric current, choosing to send together with the electric wire method and the style of the wire, then proceeding the calculation of short-circuit electric current. This first step of design included:(1) ascertain the total project; (2) load analysis; (3) the calculation of the short-circuit electric current; (4) the design of an electric shock the system design to connect with system and the choice of line project. Keyword： substation ；load ；transmission system； HYPERLINK app:ds:powerpower HYPERLINK app:ds:distributiondistribution HYPERLINK app:ds:systemsystem 目录 TOC \o 1-3 \h \u HYPERLINK \l _Toc359332738 第一章 绪论 PAGEREF _Toc359332738 \h 1 HYPERLINK \l _Toc