摘 要我国大部分农村电网薄弱，变电所数量少，供电半径长，线路损耗大，致使线路末端用户电压过低，影响人民正常的生活和生产，为了达到迅速改变我国农村电网目前的状况，满足人民生活用电兼顾工农业进展，本变电所属于中小型变电所，进线端电压为110kV变电所。本次设计的变电所位于城市的工业区附近。其变电所电气一次部分主要采纳110kV 进线一回，10kV出线五回，35kV出线四回。由于此变电所所在位置交通便利,且为330kV 以下, 所以应选用三相变压器。本次设计最重要的任务是一次系统中的接线形式、变压器、母线和电器设备的选择；变压器出线路的继电的继电保护等主要内容。设计本着使电力供应和传输安全、可靠、灵活、经济的原则。其中主变压器容量的选择是根据所带负荷多少，并考虑到10年规划和线损，采纳一台变压器（SFSL1-25000/110KV ）。关键词：电气一次部分，电气设备选择，主变保护目 录前言······································································································11. 设计的要求及任务书················································································51 ．1 设计的题目·······················································································52 设计的基本要求基本条件及原始数据························································51.2.1 变电所类型·····················································································62 系统负荷计算及各种电气设备选择·······························································72 ．1 系统的负荷计算··········································································...
