110kV降压变电所一次系统设计

电子机电论文编号:JD070    包括设计图纸,字数:21633,页数:62

目 录

摘要............................................................... 1
第一章绪论 ........................................................ 4
第二章设计的要求 .................................................. 5
2.1  原始数据........................................................5
2.2  出线情况........................................................5
2.3  系统情况 .......................................................5
2.4. 环境条件 ...................................................... 5
第三章电气主接线设计 ...............................................6
3.1电气主接线选择要注意的问题........................................6
3.1.1 运行的可靠.....................................................6
3.1.2 具有一定的灵活性 ..............................................7
3.1.3 操作应尽可能简单、方便.........................................7
3.2  主变压器选择 ...................................................8
3.2.1  设计原则与规范................................................8
3.2.2  容量、台数选择及校验......................................... 8
3.2.3  主变型式的选择 .............................................. 9
3.3  主接线设计 ....................................................11
3.3.1  设计原则与规范...............................................11
3.3.2  110KV的接线形式..............................................13
3.3.3  35KV的接线形式 ..............................................15
3.4  所用电设计 ....................................................17
3.5  限流问题 ......................................................20
3.6  中性点设计 ....................................................20
3.6.1  设计原则 ....................................................20
3.6.2  电容电流计算 ................................................21
3.7  无功补偿.......................................................22
3.7.1  无功补偿意义.................................................22
3.7.2  无功补偿方式 ................................................22
3.7.3  并联电容器的选择 ............................................23
第四章短路电流的计算 ..............................................26
   4.1短路计算的目的................................................26
   4.2 短路电流计算的一般要求.......................................26
   4.3 短路电流计算 ................................................27
   4.4 参数计算 ....................................................27
 4.5 网络化简及计算.................................................28
  4.5.1  110KV母线短路电流计算......................................28
  4.5.2  35KV母线短路电流计算 ......................................29
  4.5.3  10KV母线短路电流计算.......................................29
第五章电气设备选择 ................................................31
5.1  电气设备选择的主要任务 ........................................31
5.2  选择导体和电气的一般原则.......................................31
5.3  选择导体和电气的技术条件.......................................31
5.3.1  长期发热选择导体 ............................................32
5.3.2  按经济电流密度选择导体 ......................................32
5.3.2  导体、电气设备的选型 ........................................32
5.4  校验...........................................................34
5.5  具体运算 ......................................................35
5.6  电气设备的选型 ................................................40
5.6.1  一般原则.....................................................40
5.6.2  设备选择.....................................................40
5.7  选择结果 ......................................................48
第六章  配电装置设计和总平面布置设计................................51
6.1 配电装置及电气总平面设计的意义 .................................51
6.2 配电装置的设计 .................................................51
6.2.1配电装置设计应满足的基本原则...................................51
6.2.2各电压级配电装置型式的选择.....................................51
6.3总平面布置设计...................................................53
6.3.1 设计任务......................................................53
6.3.2总平面布置设计的基本原则 ......................................54
第七章  防雷设计 ...................................................55
7.1雷害的来源.......................................................55
7.2  直击雷保护.....................................................55
7.2.1  保护对象.....................................................55
7.2.2  保护措施.....................................................55
7.2.3  避雷针保护应注意的问题 ......................................55
7.3  雷电侵入波保护.................................................56
7.3.1配电装置对侵入雷电波的保护.....................................56
7.3.2  进线段保护...................................................57
7.4  避雷器的选型 ..................................................58
7.4.1  防雷保护计算 ................................................58
7.4.2  避雷器选择 ..................................................58
致   谢 ........................................................... 59
参考文献............................................................60

摘 要

本文根据任务书上所给的系统与线路及负荷参数，分析拟建变电站的进出线方向和负荷等资料，从可靠性、安全性、经济性等方面考虑，确定了电气主接线方式。并通过对负荷资料的分析，安全，经济及可靠性方面考虑，确定了110kV，35kV，10kV以及站用电的主接线，然后又通过负荷计算及供电范围确定了主变压器台数，容量及型号，同时也确定了站用变压器的容量及型号，最后，根据最大持续工作电流及短路计算的计算结果，对高压熔断器，隔离开关，母线，绝缘子和穿墙套管，电压互感器，电流互感器进行了选型，然后进行配电装置和平面布置的设计以及防雷的设计,从而完成了110kV电气一次部分的设计。
关键词：变电站 变压器  接线
Abstract
This article according to the system logical circuit which and the load parameter in the project description gives, the analysis plans to construct the transformer substation to enter material and so on going beyond a line direction and load, from aspects and so on reliability, security, efficiency considered, has determined the electrical main wiring way. And through to shoulders the material the analysis, safe, the economy and the reliable aspect considered, had determined 110kV,35kV,10kV as well as the station use electricity the main wiring, then calculated through the load and supplies power the scope to determine the main transformer Taiwan number, the capacity and the model, simultaneously also had determined stood with transformer's capacity and the model, finally, according to most greatly continually the operating current and the short circuit computation's computed result, to the high-pressured fuse, the isolator, the bus bar, the insulator and put on the wall drive pipe, the voltage transformer, the current transformer has carried on the shaping, then carried on the power distribution equipment and the plane layout design as well as the anti-radar design, thus has completed 110kV electricity partial designs.
Key word: Transformer substation transformer wiring