摘要这些年来，由于我国经济的不断增长及人民群众的生活质量在不断的提高，人民群众的用电量也在慢慢的增加，电力系统及设备也在随之升级，为了保障安全可靠的供电，对电网的要求越来越高。社会经济的发展离不开电网建设，加快城市电网和农村电网的建设及改造工作愈发重要。电网建设的快速发展，促进了城市电网和农村电网110KV变电站的建设。但是由于建设地点的地理位置条件错综复杂和其他一些客观条件的影响，如何设计和规划城市电网和农村电网，是我国电网建设、改造中需要解决的问题。71694

本次设计主要是根据任务书上的要求，假设某个地方的负荷现状及分析负荷的发展趋势。用电量的增加必然导致负荷的增加，然后阐述建站的意义，且从可靠性、经济性及安全性方面考虑。通过负荷计算，确定主变压器的型号、容量、台数及站用变压器的型号、容量、台数；然后再对短路电流的工作条件进行分析，选取本次设计的设备，从而完成变电站一次部分的设计。

该论文有图13幅，表18个，参考文献32篇。

毕业论文关键词：变电站  负荷计算  短路电流  设计

Main Electric Connection Design of Main Electric Connection 110KV Transformer Substation

Abstract Recent years,with the unceasing boom of our country’s economy as well as the continues improvement of people’s living life,public demand for power is gradually increasing.Power systems and equipments are also upgraded for ensuring safe and reliable power supplies.So the requirements for grid are becoming higher and higher.As we know,the rapid development of social economy have promoted the construction of urban power grid and transformer of rural power grid‘110KV substation’.Nevertheless,the problem we need to solve in constructing and remolding power gid is to consider how to devise and make good plans of it due to complex geographical conditions and other objective effections.

In accordance with requests in the mission assignment,we assume that we have load situation of someplace and analyse its developing trend. Increasing electricity consumption will inevitably lead to load augment.Then explained the significance of its establishment from the reliability,economy and safety perspectation.The type,capacity and amount of main transformer and station transformer can be confirmed by calculating load.At last I analyze working conditions of short-circuit current and select this design equipment to complete part of the design of substation.

The thesis has 13 images,18 tables,32 references.

Key Words: Substation  load calculation  short circuit current  design

目  录

摘  要 I

Abstract II

1绪论 1

1.1 课题设计的背景及意义 1

1.2 课题设计主要研究的内容 2

2变电站的原始资料 3

2.1 变电站的规模 3

2.2 变电站的基本数据 3

2.3 变电站站址情况 4

2.4 变电站系统情况 4

2.5 本章小结 4

3负荷计算及变压器选择 5

3.1 负荷的计算 5

3.2 主变压器的选择 6

3.3 站用变压器的选择 8

3.4 本章小结