摘要本设计根据任务书提供的系统与线路及所有负荷参数,以及待建变电所的实际情况,通过对待建变电所的概括以及出线方向来考虑,以及对负荷资料在安全,经济及可靠性方面分析,确定了220kV,110kV,10kV的主接线,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,通过对各电压等级的短路计算,为待建变电所的高压断路器、隔离开关、母线,电压互感器以及电流互感器等电气设备进行合适选型。同时也完成了继电保护和防雷保护的初步设计,以及各电压等级的配电装置的选型。8977
关键词 变电所 主接线 短路计算 电气设备
毕业设计说明书(论文)外文摘要
Title 220kV substation in buck electric primary design
of a part
Abstract
This design under task book provides of the system and lines and all load parameters, as well as the substation to be built by treating the generalization of the built substation and outgoing direction to consider, as well as load data security, economic and reliability analyzed to determine the 220kV, 110kV,10kV main wiring ,load calculation
and supply area to determine the number of main transformer capacity and
model, the voltage level of the short-circuit, high voltage circuit breaker substation to be built, isolation switches, bus, voltage transformers and current transformers and other electrical equipment for the appropriate selection. Also completed the preliminary design of relay protection and lightning protection, as well as the selection of the voltage level of the power distribution unit.
Keywords substation main wiring short-circuit electrical equipment
目次
1 引言 1
2 主变压器及电气主接线选择 1
2.1主变压器台数的选择 2
2.2主变压器容量的选择 2
2.3主变型号选择 3
2.4电气主接线的选择 4
3 短路计算 7
3.1短路的危害 7
3.2短路计算的目的 7
3.3系统等值电路及化简 8
3.4最大运行方式下的短路电流计算 11
4 电气设备选型 18
4.1电气设备选择 18
4.2高压断路器的选择 20
4.3隔离开关的选择 27
5 母线及互感器的选择校验 31
5.1母线选择的原则 31
5.2 220KV母线的选择及校验 32
5.3 110KV母线的选择及校验 35
5.4 10KV母线的选择及校验 39
5.5互感器选择 41
6 所用电的接线方式与所用变的选择 45
6.1所用电的接线方式确定 45
6.2所用变压器的选择 47
7继电保护规划设计 47
7.1继电保护配置的一般原则 47
7.2继电保护具体配置 48 220kV降压变电所电气一次部分初步设计+接线图:http://www.751com.cn/zidonghua/lunwen_7533.html