小型水电站电气部分设计+文献综述
电气主接线部分主要介绍了其重要性、基本要求、设计依据，对比了各种接线形式的优缺点，并最终制定了适合本设计要求的主接线；主变压器部分介绍了水电站主变压器台数、容量、型号等技术数据的确定；厂用电接线部分包括厂用电接线要求，厂用变压器台数，容量、型号的选择以及厂用电接线设计。电气设备的选择包括各个设备的基本要求、选择条件以及准确度等级。
最后介绍了接地保护、二次回路以及继电保护。
以上设计均参照水电站设计手册，符合国家相关规定。
关键词 水电站 电气设计 短路电流计算 设备选择
毕业论文设计说明书外文摘要
Title The electrical design of XX small Hydropower Station
Abstract
The design of XX issue of small electrical part Hydropower Station. The main contents include selection, design of electrical grounding protection once the main wiring system, auxiliary power part of the design, selection of the transformer, short-circuit current calculation, electrical equipment, secondary circuit and relay.
Main electrical wiring section introduces the importance of basic requirements, design basis, comparing the advantages and disadvantages of various forms of wiring, and ultimately developed a design suitable for the requirements of the main wiring; main transformer section describes the number of units Station Main Transformer capacity to determine the type and other technical data; auxiliary power wiring portion includes auxiliary power wiring requirements, auxiliary transformer station number, capacity, model selection and auxiliary power wiring design. Choose electrical equipment including the basic requirements of each device, the selection criteria and the level of accuracy.
Finally, the ground fault protection, secondary circuit and relay protection.
Above all with reference to the design manual station design, comply with national regulations.
Keywords Hydropower Electrical Design Short circuit calculation Equipment selection
目 次
1 引言 1
2 基本资料 2
3 电气主接线设计 3
3.1 基本要求 3
3.2 特点 3
3.3 主接线方案拟定 4
4 主变压器 6
4.1 主变压器容量的选择 6
4.2 主变压器台数的选择 6
5 水电站厂用电接线 7
5.1 厂用电的组成及特点 7
5.2 厂用电负荷的统计原则 7
5.3 厂用变压器选择 7
5.4 厂用电接线 9
6 短路电流计算 10
6.1 短路电流的计算步骤 10
6.2 计算公式 10
6.3 短路电流参数计算 11
7 电气设备的选择 15
7.1 电气设备选择的一般条件 15
7.2 断路器的选择 16
7.3 隔离开关的选择 16
7.4 导体选择 17
7.5 互感器选择 18
8 保护接地 21
8.1 一般要求 21
8.2 降低接触电势和跨步电势的措施 21
8.3 水电站需要接地的部分 21