毕业设计
某煤矿35kV变电所电气设计
学生姓名： 学号： 自动化
系 部： 电气工程及其自动化
专 业： 指导教师：
二零一四年 六 月
诚信声明
本人郑重声明：本论文及其研究工作是本人在指导教师的指导下独立完成的，在完成论文时所利用的一切资料均已在参考文献中列出。
本人签名：
年 月 日
太原工业学院毕业设计
某煤矿35kV变电所电气设计
摘 要
电力是当今世界使用最为广泛、地位最为重要的能源。变电站是供电系统的枢纽，它直接影响整个电力系统的安全与经济运行，起着变换和分配电能的作用，在生产和生活中占有特殊重要的地位。
本设计根据某煤矿的电力负荷资料，作出了该煤矿地面35kV变电所的初步设计。设计中先对负荷进行了统计与计算，选出了所需的主变型号，然后根据负荷性质及对供电可靠性要求拟定主接线设计，考虑到短路对系统的严重影响，设计中进行了短路计算。设计中还对主要高压电器设备进行了选择与计算，如断路器、隔离开关、电压互感器、电流互感器等。此外还进行了防雷保护的设计和计算，提高了整个变电所的安全性。本设计以实际负荷为依据，以变电所的最佳运行为基础，按照有关规定和规范，完成了满足该煤矿供电要求的35kV变电所初步设计。
关键词：35kV变电站，变压器，电压互感器，短路电流计算，防雷保护
I
太原工业学院毕业设计
35kV Substation Electrical Design of a Coal Mine
Abstract
Electric power is the most widely used energy,which accouts for important status in th- e word.In practical application,substation is an essential component of the power system,w- hich directly affects the safety and economic running of the whole power system.The subst- ation also plays a role of transferring and distributing the electric energy,which is the hinge of the power supply system and has a vital status in production and daily life.
According to the electricity load information about the coal mine,I made a rough desi- gn of the 35kV substation of this coal mine.First,I accomplished the statistics and the calcu- lation about the load and select the model of transformer.Then,according to the nature of lo- ad and the demand of the reliability of power supply,I made the main connection design.As the affect of short-circuit current to power system taken into account,I figured out the curre- nt when short-circuit happen.Depend on the results,I have selected the model of the main high voltage deviceon which includes breakers,disconnector, voltage transformer, current transformer and so on.Furthermore,I finished the design and calculation of lightning protec- tion. The design is made on the base of an optimal running, according to related rules and regulations and meet the power supply requirement.
Key words：35kVsubstation，transformer，potential transformer，short circuit calculation，lightning protection
II