某220kV变电所设计

文档编号:DQ048    文档字数:15284,页数:46

摘 要
 本次设计为某枢纽220kV变电所的初步设计，内容包括：电气主接线方案的拟定、比较和选择；短路电流的计算；主要电气设备和导体的选择；设备汇总和绘制主接线图。所设计的内容力求概念清楚、层次分明、图文对照、表格齐备。
 变电站是电力系统的重要组成部分，起着电能的接受、分配、联络、稳定系统的重要作用。电气主接线是变电所的主要部分，电气主接线的方式直接影响运行的可靠性、灵活性，它的拟定直接关系着电气设备的选择、配电装置的布置，是变电所电气部分投资大小的决定性因素。本次设计考虑可靠性和灵活性，220kV和110kV母线采用双母线带旁路结线形式。本设计根据已知参数和计算结果进行主要电气设备和导体的选择，最后进行了设备汇总和主接线图的绘制。
 
 
关键词:变电站、一次接线、短路电流、电器设备选型

Abstract
 This paper aims to present the preliminary design of a pivot 220kV transformer substation. The design mainly includes four parts: drafting, comparison and choosing of main electric scheme; calculation of Short-circuit current; choosing of main electric equipment and the conductor; the gathering of the equipment and drawing of main writing diagram. The designed contents attempt to give a clear concept, a well-arranged process, contrasted pictures and texts, and complete forms.
 The transformer substation is the important component of the power system. It is the vital part in the acceptance and distribution of electric energy, for it can complete the communication among different parts of the power system and enable the system’s stability. Main electric scheme is a main part of the transformer substation, and it directly influences the operation’s dependability and flexibility. Besides, the study out of main electronic scheme decides the choice of the electric equipment and the placing of the distribution devices, so it is the most important factor that decides the electric investment in a transformer substation. Taking dependability and flexibility into consideration, for 220kV and 110kV bus bar, the design adopts the line form of dual-node bus with bypass line. The design chooses the main electric equipment and choice of the conductor according to the known parameter and result of calculation, carries on the check-up of the switchgear, and finally present the gathering of equipment and the drawing of main wiring diagram.
 
 
Keywords：Transformer substation, Wire once, Short-circuit current, Choose electric equipment

目 录
摘要 I
Abstract II
1  原始资料 1
1.1 原始资料 1
1.2 应完成项目 2
2  变电所主接线设计 3
2.1 主变台数、型号、容量选择 3
2.2 主接线设计 9
3  所用电设计 13
3.1 应注意的问题 13
3.2 所用电设备布置应遵循的原则： 13
3.3 电源数量及容量： 13
3.4 所用电源引接方式 14
4  短路电流计算 15
4.1 短路流计算的目的 15
4.2 短路电流计算的一般规定 15
4.3 短路电流计算步骤 16
4.4 详细计算 16
5  导体、电器设备选择 21
5.1 选择的一般规定 21
5.2 高压断路器，隔离开关选择 22
5.3 母线选择 26
5.4 电力电缆的选择（ 10KV侧） 33
5.5 互感器的选择 34
总结 40
参考文献 41
致谢 42
附录I：装配电气一览表 43

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