最新110kv变电站电气一次系统

110kv变电站电气一次系统 精品好文档，推荐学习交流

仅供学习与交流，如有侵权请联系网站删除 谢谢I 110kV变电站电气一次系统设计

摘要

变电站作为电力系统中的重要组成部分。它是电力系统中变换电压、接受和分配电能、控制电力的流向和调整电压的电力设施，它通过其变压器将各级电压的电网联系起来。它的安全运行直接影响到整个电力系统的安全性与经济性。

本论文中设计的是一个降压变电站，在系统中起着汇聚和分配的电能的作用。本文首先分析了任务书上所给的参数，对原始资料进行分析再从可靠性、灵活性、经济性方面考虑确定了五种电气主接线方案，再从中中选择了两种方案进行比较。

其次根据变电站的负荷选择了变电站的主变压器容量、台数、型号。

再进行短路电流计算，从三相短路计算中得到当短路发生在各级母线时，其稳态短路电流，冲击电流等值。在根据计算结果、电压等级和最大工作持续电流进行断路器及隔离开关的选择，并将两种方案进行经济比较，得到最优方案，再根据上面的计算结果选择其他的电气设备（包括电力互感器、电压互感器、绝缘子、穿墙套管等）。

最后绘制电气主接线图、电气总平面布置图、防雷接地图等图纸。

关键词：变电站；主接线；短路电流；电气设备

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仅供学习与交流，如有侵权请联系网站删除 谢谢II A DESIGN OF ELCTRIC SYSTEM FOR

110KV SUBSTATION

Abstract

Substation，as an important part of Power system.This electricity facility is used to

transform the voltage、receiving and distributing the power、control the flow of electricity and

adjust the voltage in the power system.It combine the voltage power grid at all levels by

transformers. It directly affects the safe operation of the entire power system security and

economy.

This paper designs a step-down substation, it plays a role of aggregation and distribution of

electricity in the system.First, the paper analyzes parameters in the mission statement,then

considering the reliability、flexibility and the economy of the Main Electrical Wiring, I get 2

from 5 projects.

Second, according to the load of the substation,I choose the main trasformers,and get its

capacity、quantity and the type.

Then, compute the short-circuit current,we get steady-state short-circuit current、the impact

of current and others when the levels of the generators are three-phase short circuit.according to

the result of the compute、voltages and the maximum continuous operating current,I get the

breakers and isolating pare the economy of the two projects,I get the best one.then

by the data we got,choose the other electrical equipment(Including power transformers, voltage

transformers, insulators, wall bushing).

Finally, draw the diagram of the main electrical wiring、electrical general layout plan、Lightning protection grounding etc.

Key words: Substation;Main Electrical Wiring;Short-circuit current; Electrical equipment

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仅供学习与交流，如有侵权请联系网站删除 谢谢III

目录

摘要 .................................................................................................................................................. I

Abstract .......................................................................................................................................... II

目录 ................................................................................................................................................. 3

第一章 设计内容和要求 ................................................................................................................ 6

1.1原始资料 ................................................................................................................................... 6

1.2设计原则和基本要求 ............................................................................................................... 6

1.3设计类容 ................................................................................................................................... 6

第二章 电气主接线的选择 ............................................................................................................ 7

2.1概述 ........................................................................................................................................... 7

2.1.1运行可靠性 ............................................................................................................................ 7

1）断路器检修时，不宜影响对系统的供电； ........................................................................... 7

2.1.2灵活性 .................................................................................................................................... 7

2.1.3经济性 .................................................................................................................................... 7

2.1.4操作应尽可能简单方便 ........................................................................................................ 8

2.2主接线的接线方式选择 ........................................................................................................... 8

2.3电气主接线初选方案 ............................................................................................................... 8

第三章 变压器选择 ...................................................................................................................... 14

3.1概述 ......................................................................................................................................... 14