摘要本设计中通过对XX县城110kV降压变电站的近期负荷和远期负荷的分析，列出了约束条件，分析计算确定了变电所的主变压器以及所用变压器的型号与数量。根据国家变电站设计规范手册条例规定，分别拟定了高低压侧主接线方案，并通过比较各方案优缺点结合该变电所的实际情况，最后确定该所的电气主接线形式。将送电网络进行合理简化，画出其等效电路图并依次分析选定短路点位置，计算各线路阻抗和元件的标幺值，进而计算三相短路电流和短路容量。通过规范手册规定以及前期短路计算所得数据条件，分别对高低压侧一次电气设备进行选型拟定，并通过校验各元件的动稳定，热稳定和其他限制约束来最终确定型号。根据规范以及习惯来确定高低压侧母线材料和类型，通过具体参数的选择校验，确定母线的型号。依据《3～110kV高压配电装置设计规范》来确定高低压的配电装置形式，初步进行配电装置的布置。最后按照设计，绘制出变电所的电气主接线图，以及变电所的平面布置图。
关键词 变电所 110kV 设计 接线 一次设备 短路计算
毕业论文设计说明书外文摘要
Title A 110kV buck substation design of XX county
Abstract
In this design,Through the analysis of the substation’s load to identified the main transformer substation and the transformer substation’s transformer number and model.According to "35 ~ 110kV substation design specifications" Manual of regulations were drawn up high and low side once part of the main electric connection schemes, and the advantages and disadvantages of the actual situation of the substation by comparing the plan to finalize the Institute of Electrical Main connection form.Calculated data conditions specified by the rule book and previous short circuit, respectively, high and low side prepared a selection of electrical equipment, and by checking its dynamic stability, thermal stability and other restrictions to determine the device type. According to norms and habits to determine the high and low side of the bus and the type of material, by choosing specific calibration parameters determine the bus models. According to "3 ~ 110kV high voltage electrical installations" to determine the form of high and low voltage power distribution equipment, initially laid out power distribution unit. Finally, according to the design drawing substation main electrical wiring diagrams, and floor plan substation.
Keywords Substation 110kV Design Wiring Primary equipment Short circuit calculation
目 录
1 引言 1
2 任务说明及分析 2
2.1 变电站原始资料 2
2.2 设计内容及成果 3
3 负荷分析计算及变压器的选择 4
3.1 负荷分析计算 4
3.2 主变压器的选择 4
3.3 所用变压器的选择 6
4 电气主接线的设计 8
4.1 变电站电气主接线的要求 8
4.2 主接线的方案拟定与选择 8
5 短路电流计算 11
5.1 短路电流计算条件 11
5.2 短路计算过程 12
6 电气设备的选择 15
6.1 电气设备选择的原则 15
6.2 110kV侧电气设备的选择 15
6.3 10kV侧电气设备的选择 17
6.4 母线的选择 20 县城110kV降压变电站设计+电路图:http://www.751com.cn/zidonghua/lunwen_26996.html