论文总字数：27317字

摘 要

随着经济的飞速发展，电力这种洁净的二次能源将对未来的国民发展起着举足轻重的作用。为促进电力工业的持续稳定发展，满足某个地区供电负荷要求，实现安全供电，保证供电可靠性，变电所的合理设计就变得尤其重要。

新建一座110kV区域变电所，该所建成后与110kV电网相连，并供给近区用户。该变电站主要用于丰水季节区域小水电电力外送主网。主要涉及了：

进行负荷计算、电气主接线设计、变压器选择、短路电流计算、设备选择、所用电选择、无功补偿、防雷规划、继电保护配置等。

关键词：110KV变电所 电气设备 短路计算

Electrical part design of 110kV substation

Abstract

With the rapid development of economy, the clean energy of power will play a vital role in the development of the future of the national development of the future.. In order to promote the sustainable and stable development of power industry, meet the requirements of power supply load, realize the safe power supply, guarantee the reliability of power supply, the reasonable design of substation becomes especially important..

A new 110kV area substation, which is connected with the 110kV grid after the completion of the building, and provides near area users. The substation is mainly used for the wet season regional small hydro power transmission network.

Carry out load calculation, electrical main wiring design, transformer selection, short-circuit current calculation, equipment selection, power selection, reactive power compensation, lightning protection plan, relay protection configuration, etc..Mainly related to the main wiring design. Main transformer selection. Calculation of short-circuit current. Electrical equipment selection. Relay protection planning. Lightning protection design. Distribution equipment design.

Keywords: 110KV substation ；electrical equipment ；short-circuit calculation

目录

1. 绪论.................................................... 1

1.1课题背景................................................... 1

1.2原始资料................................................... 2

1. 电气主接线设计......................................... 3

2.1 电气主接线概述............................................. 3

2.2 变电所分类................................................. 3

2.3 新建变电站的分析........................................... 4

2.4 电气主接线图的基本形式..................................... 4

2.5 接线设计................................................... 5

2.6 主接线方案的比较与选择...................................... 6

1. 主接线中的设备配置...................................... 8

3.1 隔离开关的配置.............................................. 8

3.2 接地刀闸或接地器的配置...................................... 8

3.3 电压互感器的配置............................................ 8

3.4 电流互感器的配置............................................ 9

3.5 避雷器的装置................................................ 9

第四章 主变压器的选择.......................................... 11

4.1 负荷分析.................................................... 11

4.2 主变压器台数的确定.......................................... 12

4.3 主变压器相数的确定.......................................... 12

4.4 主变压器容量的确定.......................................... 13

第五章 短路电流的计算.......................................... 14 

5.1 短路电流计算的目的及规定.................................... 14

5.2 短路电流计算............................................... 20

5.3 短路电流的计算结果......................................... 20

第六章 主要电气设备的选择..................................... 22

6.1 电气设备选择概述........................................... 22

6.2 高压断路器及隔离开关的选择................................. 23

6.3 母线的选择................................................. 32

6.4 绝缘子和穿墙套管的选择..................................... 37

6.5 电流互感器的选择........................................... 41

6.6 电压互感器的选择........................................... 44

6.7 熔断器的选择............................................... 46

6.8 避雷器选择................................................. 47

6.9 电容电流计算............................................... 50

6.10 消弧线圈的选择 ........................................... 50

第七章 变电站防雷规划......................................... 52

7.1 防雷规划原则.............................................. 52

7.2 防雷规划结果.............................................. 53

结束语......................................................... 54

参考文献....................................................... 55

致谢........................................................... 57

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