课程设计任务书设计题目：110kV变电站电气一次部分设计前言变电站（Substation）改变电压的场所。是把一些设备组装起来,用以切断或接通、改变或者调整电压.在电力系统中，变电站是输电和配电的集结点.主要作用是进行高底压的变换，一些变电站是将发电站发出的电升压，这样一方面便于远距离输电，第二是为了降低输电时电线上的损耗；还有一些变电站是将高压电降压，经过降压后的电才可接入用户。对于不同的情况，升压和降压的幅度是不同的，所以变电站是很多的,比入说远距离输电1时，电压为11千伏，甚至更高，近距离时为1000伏吧，这个电压经变压器后，变为220伏的生活用电，或变为380伏的工业用电。随着我国电力工业化的持续迅速发展，对变电站的建设将会提出更高的要求。本文通过对110KV变电站一次系统的设计,其中针对主接线形式选择,母线截面的选择,电缆线路的选择，主变压器型号和台数的确定，保护装置及保护设备的选择方法进行了详细的介绍。其中，电气设备的选择包括断路器、隔离开关、互感器的选择和方法与计算，保护装置包括避雷器和避雷针的选择。其中分析短路电流的计算方法和原因，是为了保证供电的可靠性。目录第1章原始资料及其分析··············································41原始资料···························································42原始资料分析·······················································6第2章负荷分析·······················································6第3章变压器的选择··················································8第4章电气主接线······················································11第5章短路电流的计算················································141短路电流计算的目的和条件·········································142短路电流的计算步骤和计算结果····································15第6章配电装置及电气设备的配置与选择····························181导体和电气设备选择的一般条件····································1822设备的选择························································19结束语····································································25致谢······································································26参考文献·································································27附录一：一次接线图第一章原始资料及其分析1。原始资料待建变电站是该地区农网改造的重要部分，预计使用3台变压器，初期一次性投产两台变压器，预留一台变压器的发展空间。1.1电压等级变电站的电压等级分别为110kV，35kV,10kV。110kV:2回35kV：5回（其中一回备用）10kV：12回（其中四回备用）31.2变电站位置示意图：A待建变电站BC图1变电站位置示意图1。3待建变电站负荷数据(表1）表1待建成变电站各电压等级负荷数据电压等级用户名称最大负荷（MW）回路数供电方式距离(km）负荷性质铝厂151架空39Ⅰ钢厂101架空25Ⅰ35kVA变电站151架空35ⅢB变电站201架空40Ⅲ最大负荷电压等级用户名称回路数供电方式距离（km）负荷性质(MW）陶瓷厂0。561电缆4Ⅱ电机厂0。51电缆5Ⅲ化肥厂0。632电缆4Ⅱ仪表厂0。421电缆3Ⅲ10kV木材厂0。81架空14Ⅲ配电变压器0。781架空15ⅠA