220kV天水-马坝架空送电线路工程设计

论文总字数：30307字

摘 要

根据江苏省电力公司电力系统规划设计，拟在天水至马坝新建一条220kV双回路架空线路，设计数据和图纸来源于实际工程。设计主要内容包括根据导线与地线参数计算不同气象条件下导线与地线的应力与弧垂，绘制导线和地线的应力弧垂曲线。选择杆塔型号、相关绝缘子串及相关金具，校验所选绝缘子。制作弧垂模板，在平断面图上进行排杆的定位。计算杆塔荷载值并选择防振锤。输电线路是电力系统的重要组成部分，电网建设离不开输电线路的规划设计，因此做好输电线路的设计是非常重要的工作。220kV天水-马坝架空线路建成后将增加当地架空线的输电总量，提高供电稳定性，满足当地线路周边用户的用电需求。

关键词： 架空输电线路；应力； 杆塔定位

TianShui-MaBei 220kV double circuit overhead line project design

Abstract

With the continuous growth of national economy，in order to meet a large number of power demand of users，The State Grid has developed rapidly, and it is moving towards extreme high voltage remote transmission at present, currently national grid have initially to 500kV network to build the skeleton of the modern grid. Transmission lines are important components of power systems, power grid construction can’t be separated from transmission line design and construction, so do the design work is especially important. This graduation project is the engineering design of a 220kV overhead transmission line, line data from the actual work.

Keywords： Transmission line； stress； Pole Tower 目录

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

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

第一章 绪论.............................................................................1

1.1线路设计背景....................................................................1

1.2课题研究意义....................................................................1

1.3设计内容........................................................................1

第二章 导线应力弧垂计算................................................................3

2.1工程概况........................................................................3

2.2气象条件与导线参数..............................................................3

2.2.1气象条件....................................................................3

2.2.2导线参数....................................................................3

2.3计算架空线路比载................................................................4

2.4许用应力........................................................................5

2.5确定临界档距....................................................................6

2.6判断控制气象条件................................................................7

2.7各个气象条件下的应力............................................................7

2.8计算弧垂........................................................................7

第三章 地线应力弧垂计算................................................................9

3.1地线参数........................................................................9

3.2计算地线比载...................................................................10

3.3许用应力.......................................................................11

3.4确定临界档距...................................................................11

3.5判断控制气象条件...............................................................12

3.6利用状态方程确定各个气象条件下的应力...........................................12

3.7计算弧垂.......................................................................12

第四章 杆塔、 绝缘子及金具的选择.......................................................14

4.1杆塔型式的选择.................................................................14

4.1.1杆塔的型式.................................................................14

4.1.2选择的原则.................................................................14

4.1.3选择结果...................................................................14

4.2绝缘子及金具的选择.............................................................14

4.2.1绝缘子和金具的定义和分类...................................................14

4.2.2绝缘子型号的选择及其参数...................................................14

4.2.3绝缘子片数的确定...........................................................15

4.2.4耐张绝缘子串片数...........................................................16

4.2.5绝缘子串联数...............................................................16

4.2.6金具的选择.................................................................16

第五章 排杆定位.......................................................................19

5.1杆塔的定位原则.................................................................19

5.2计算K值........................................................................19

5.3杆塔定位的高度.................................................................20

5.4弧垂曲线模板及排杆.............................................................20

第六章 绝缘子串风偏角校验..............................................................23

6.1绝缘子串风荷载.................................................................23

6.2导线风荷载.....................................................................23

6.3绝缘子串风偏角.................................................................24

第七章 杆塔的荷载计算..................................................................25

7.1导线的水平档距与垂直档距.......................................................25

7.2运行情况Ⅰ（大风工况）.........................................................25

7.3运行情况Ⅱ（覆冰工况）.........................................................25

7.4断导线情况.....................................................................26

7.5断地线情况.....................................................................26

7.6安装情况Ⅰ.....................................................................27

7.7安装情况Ⅱ.....................................................................28

第八章 线路防振设计....................................................................29

8.1防振锤的原理...................................................................29

8.2防振锤的选择...................................................................29

8.3防振锤的安全距离...............................................................29

致谢...................................................................................31

参考文献...............................................................................32

附录...................................................................................33

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