青岛理工大学毕业设计（论文）
摘 要
本毕业设计为工厂变电所设计，对在工厂变电所设计中的若干问题：负荷计算，三相短路分析，短路电流计算，高低压设备的选择与校验，变压器的继电保护，变电所二次回路及自动装置，防雷与接地，变电所的过电压保护，计量，无功补偿等几方面的设计进行了陈述，并对供电主接线的拓扑结构进行了阐述。
该工厂变电所采用10kV单电源进线，采用一台1600kVA的主变压器，最大设备容量1636kW，采用并联电容器进行低压集中补偿，对变压器进行过电流，电流速断，瓦斯保护，按三类防雷建筑物设防，采用强弱电联合接地系统对建筑物进行保护。
在对供电系统短路计算的基础上，进行电力电缆和电气设备的选择设计，同时也对户外平面布置进行了初步的设计。
关键词 ： 工厂供配电，继电保护，防雷与接地，负荷计算
I
青岛理工大学毕业设计（论文）
ABSTRACT
This graduation project is designed for the factory transformer substation, to certain questions in factory transformer substation design: the load computation, the analysis of three-phase short-circuits, the short-circuit current computation, the choice and verification of high and low pressure equipment, the transformer relay protection, the secondary circuit of the transformer substation and the automatic device, anti-thunder and the connection to the earth, the transformer substation overvoltage protection, the measurement, the idle work compensated and so on, All the above aspects and the structure of the power supply host wiring topology have been stated.
The transformer substation with a 10kV single power source coil in it uses 1600kVA main transformer, the biggest computation shoulders of which is 1636kW.It adopts the shunted capacitor to carry on the low pressure centralism for compensation and sets protection for the transformer by carring on the electric current to it breaking the speed of the flow gas protection, garrisons accerding to the third kind of anti-thunder buildings,and users the strong and weak electricity union earth system to carry on the protection to the building.
Based on the computation of short-circuits to the power supply system, the project has a choice design of the power cable and the electrical equioment and a preliminary design to the outdoors plane arrangement at the same time.
Keywords ： the power distribution ，supply in factory，the relay protection
II
青岛理工大学毕业设计（论文）
目 录
摘 要 ......................................................................................................................................... I ABSTRACT .................................................................................................................................. II 第一章 绪论 ......................................................................................................................... 1
1.1课题设计背景 .............................................................................................................. 1 1.2工厂供电设计的一般原则........................................................................................ 2 1.3工厂供电设计内容及步骤........................................................................................ 2
第二章 负荷计算和功率补偿 .................................................................................... 5
2.1负荷计算的内容和目的 ............................................................................................. 5
2.2负荷计算的方法 ........................................................................................................... 5
第三章 变压器容量和数量的选择 .......................................................................... 6 第四章 主接线方案的选择.......................................................................................... 7
4.1对变电所主结线的一般要求.......................................................................... 7 4.2变电所主结线.................................................................................................. 7
4.2.1单电源进线的变电所主接线............................................................... 8 4.2.2双回电源进线变电所主接线............................................................... 8
第五章 短路电流的计算 ............................................................................................. 12
5.1短路电流计算的目的及方法........................................................................ 12 5.2三相短路电流计算........................................................................................ 12
第六章 导线、电缆的选择........................................................................................ 15
6.1 导线电缆的使用条件................................................................................... 15 6.2 导线电缆的选择........................................................................................... 15
第七章 电气设备的选择 ............................................................................................. 18
7.1电气设备选择的一般原则............................................................................ 18
7.2.1高压断路器的选择............................................. 错误！未定义书签。 7.2.3电流互感器的选择 ................................................... 错误！未定义书签。
III
青岛理工大学毕业设计（论文）
第八章 变压器的继电保护........................................................................................ 18
8.1概述 .............................................................................................................................. 18 8.2变压器电流保护的接线方式 ................................................................................. 20 8.3继电保护配置 ............................................................................................................ 20
8.3.1变压器的过电流保护 .................................................................................. 20 8.3.2变压器的电流速断保护 .............................................................................. 21
结论 ............................................................................................................................................. 25 参考文献 .................................................................................................................................. 26 附录A：10KV供电系统图 ............................................................................................. 27 附录B：低压供电系统图 .............................................................................................. 28 附录C：变压器二次电路图 ......................................................................................... 29 附录D：电压互感器二次电路图 .............................................................................. 30 附录E：接地 避雷平面图............................................................................................ 31 致 谢 .......................................................................................................................................... 32
IV