35kV降压变电站电气主接线设计.doc

课程设计(论文)
机械与电气工程学院系(院)电气工程及其自动化专业
课程设计(论文)题目 35kV降压变电站电气主接线设计
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完成日期 2012年 12 月 12 日
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35KV降压变电站电气主接线设计
The 35KV the buck substation electrical main wiring design
总计课程设计(论文) 18 页
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目录
摘要··································································- 1 -
前言······································································ 1
第一章主接线的选择····················································· 4
············································ 4
··········································· 5
···················································· 7
第二章短路电流的计算···················································10
······················································· 10

············································· 10
····················································· 15
第三章主要电气设备的选择··············································16 35KV断路器和隔离开关的选择········································· 16
35kv互感器的选择·····················································17
10kv母线及35kV线路的选择··········································· 19
10KV开关柜选择·······················································19
第四章车间变压器的选择················································21
··························································21
所用变台数的选择···················································21
所用变容量的选择
···················································22


摘要
变电站,改变电压的场所。为了把发电厂发出来的电能输送到较远的地方,必须把电压升高,变为高压电,到用户附近再按需要把电压降低,这种升降电压的工作靠变电站来完成。变电站的主要设备是开关和变压器。按规模大小不同,称为变电所、配电室等。
对于35KV降压变电站,要根据运行可靠、灵活、且经济的原则进行比较,首先应选取可靠性高且经济性好的最优的电气主接线方式;其次选择本变电站主变的台数、容量和型号。根据所选的变压器进行短路电流计算校验,由各短路电流算出短路稳态电流和短路冲击电流,对主要设备选择及校验,其中包括断路器、隔离开关、电压互感器、电流互感器等;最后根据各电压等级的额定电压和最大长期工作电流进行电气设备的选择。
关键词:主变压器电气主接线短路电流电气设备
前言
本次课程设计为35KV降压变电站电气主接线设计,原始资料及设计技术要求如下:
1. 全厂用电设备情况
(1)负载大小
用电设备总安装容量:6630kW
计算负荷(