摘要：变电站是电力系统的重要组成部分，它起着变换和分配电能的重要作用。变电站主要是由电力变压器，断路器，隔离开关，电压互感器，电流互感器等组成。作为输电和配电的枢纽，变电站的设计要满足运行可靠、操作灵活、经济合理和扩建方便等要求。电气主接线是变电站设计的首要部分，也是构成电力系统的主要环节。电气主接线是指将电气设备按照设计要求连接起来，表示接受和分配电能的电路。同时，它也是电气人员进行操作和处理事故的依据。电气主接线设计和电气主设备选择直接影响电力运行的可靠性，灵活性和经济性。所以电气主接线设计和电器主设备选择要以设计任务书为依据，结合工程实际情况，在保证供电可靠、调度灵活的情况下，尽量满足经济、美观的原则。67548

毕业论文关键词：变电站，电气主接线，变压器，电气设备

Abstract：Substation is an important part of power system, it plays an important role in transformation and distribution of electric energy. Substation is mainly composed of power transformer, circuit breaker, isolating switch, voltage transformer, and current transformer. As the transmission and distribution hub, substation design should meet the reliable running, flexible operation, reasonable in economy and convenient expansion requirements. The main electrical wiring is the most important part of substation design, but also constitute the main part of power system. The main electrical wiring refers to the electrical equipment in accordance with design requirements to connect. It is the main circuit acceptance and distribution of electric energy . At the same time, it is also the electrical personnel operation and accident treatment basis.The main electrical wiring design directly affects the reliability of electric power, flexibility and economy. So the design of the main electrical wiring should be based on the design task as the basis, combined with the actual situation of engineering, to ensure reliable power supply, scheduling flexible circumstances, as far as possible to meet the economic, aesthetic principle.

Keywords: Substation,the main electrical wiring,transformer,electrical equipment

目录

1  绪论 1

1.1  110kV变电站的发展概述 1

1.2  设计背景 1

1.3  设计规模 1

1.4  本设计的主要工作 2

2  变电站设计的基本理论 3

2.1  电气主接线 3

2.2  短路电流计算 4

2.3  电气主设备选择 4

2.4  导线的选择 5

2.5  防雷设计 5

2.6  接地设计 6

2.7  站用电及直流电设计 6

3  变电站电气主接线设计 6

3.1  常见的电气主接线方式 6

3.2  初步方案设计与特点 10

3.3  主接线设计方案分析 13

4 电气主设备的选择 15

4.1  电气设备选择的一般要求 15

4.2  电气设备的选择及其校验 15