摘 要：随着我国国民经济的高速增长，用电量不足已经成为制约我国经济发展的重要因素之一。为保证正常的供配电要求，各地都在兴建一系列的供配电装置。本次所设计的课题是某地区220KV降压变电站的设计，该变电站是一个地区性重要的降压变电站，它主要承担220KV及110KV两个电压等级功率的交换，把接受功率全部送往110KV侧线路。因此此次220KV降压变电站的设计具有220KV、110KV及10KV三个电压等级。220KV侧为主功率输出，110KV侧以接受功率为主，10KV主要用于本所用电以及无功补偿。作为一个区域变电站，停电的整体，将影响整个地区以及变电站一级。56785

本研究课题以220KV地区设计变电站为案例，论述了电力系统中变电站部分电气设计（一次部分）的全过程。通过对变电站的主接线设计，电气布线设计，电气设备，热稳定校验，主模型和电气参数的测定，总配电设备剖面和功补偿方案设计和详细设计，完成了电力系统中变电站设计。

毕业论文关键字：变电站   主接线设计    设备选择  无功补偿

Abstract:With the fast growth of the our country national economy,using the electricity also becomes important of the development and supervision in our country. Everywhere a series of electricity device are built. The subject is designed to 220kV step-down substation in an area. The design of the substation is an important regional step-down substation, which is mainly responsible for 220kV and 110kV power of two voltage levels.It sends all accepted power to 110kV power line side. Therefore the design of  220kV step-down substation has 220kV, 110kV and 10kV of three voltage levels. 220kV side is the main power output.110kV side accepts the power mainly.10kV side is used for auxiliary Power and reactive power compensation. As a area substation, when at the power failure,it will affect the whole region and the power substation in the next level.

The statement about the 220kv transformer area substation design, discussed some electrical transformer stations design (one part) in power systems engineering of the entire process. Through the main transformer stations wiring design, stations wiring design stations, short circuit current calculations, check electrical equipment moving and thermal stability, set the main electrical equipment models and the parameters, design general electric graphic and without power compensation. Lastly,completed substation design in power system.   

Key words: Substation, The wiring design, Short circuit calculation, Equipment selection, Without power compensation.

目录

1 绪论 4

1.1 变电站接线方案趋于简单 4

1.2 大量采用新的电气一次设备 5

1.3 变电站综合自动化技术新动向 5

1.4 变电站占地及建筑面积减少 7

1.5 绪论的目的和意义 7

2 设计概述 7

2.1设计任务 7

2.2原始资料 7

3 电气主接线 8

3.1 主接线设计的基本要求 8

3.1.1 可靠性 8

3.1.2 灵活性 9

3.1.3 经济性 9

3.2 常用的各种接线方式及特点 9

3.2.1 单母线接线 9

3.2.2 单母线分段接线