供电工程课程设计.doc

某工艺编织厂供配电系统电气部分设计

  摘要
　　　本厂是10kV变电站的主接线设计及变压器的选择，变电所电气主接线设计是依据变电所的最高电压等级和变电所的性质，选择出一种与变电所在系统中的地位和作用相适应的接线方式。在经济角度上要考虑周全，尽量以最少的投资获得最佳的方案。按照要求选择合适的变压器。短路电流计算，对变电站系统中的各个电压等级下的母线发生三相短路时，所流过的短路电流进行了分别计算。电气设备动、热稳定校验，电气设备的选择条件包括两大部分：一是电气设备所需要满足的基本条件，即按正常工作条件选择，并按短路状态校验动、热稳定；二是根据不同电气设备的特点而提出的选择和校验项目。主要电气设备型号及参数的确定。电气总平面及配电装置断面设计和无功补偿方案设计，较为详细地完成了电力系统中变电站设计。
　　　通过本次课程设计，旨在熟悉变电所中供电系统的负荷计算，掌握变电所中二次回路的基本原理，在次基础上对供电系统中的变电所二次接线进行了设计和保护，最后根据具体环境条件对电气设备进行校验，使本次设计的内容更加完善。

关键词：变电站；短路电流；热稳定；无功补偿；二次接线

 ABSTRACT

　　The design of the content is 10 KV electric substations. Design elements include: the main substation transformer wiring design and the choice of electrical substation main wiring design is based on the maximum voltage substation substation and the nature, to choose a substation in the system and the status and Suited to the role of the connection mode. In an economic point of view on the need to consider well, at least as far as possible to get the best investment programme. Choose the right in accordance with the requirements of the transformer. Short-circuit current basis, the system of substations in various voltage levels under the three-phase short circuit occurred when the bus, the flow of a short circuit were calculated. Fixed electrical equipment, thermal stability check, the choice of electrical equipment, including two major conditions: First, electrical equipment needed to meet the basic conditions, that is, the normal working conditions of choice, and short-circuit state check dynamic, thermal stability and the other is According to the characteristics of different electrical equipment by thon and validation pre selectiojects.
　　Through this course designed substation with the load in the power supply system, the master substation secondary circuit of the basic principles at the basis of the power supply system of the substation to the secondary wiring design and protection, the last under the specific environmental conditions on the electrical equipment to check, so that the content of this design more perfect.

Key words: Substation; Short circuit; Thermal stability; Reactive Compensation ;Secondary circuit.

                          目录

摘要 
1前言 1
2负荷计算 2
2.1 三相用电设备组负荷计算的方法 2
2.2 计算负荷及无功功率补偿 2
3无功补偿的计算 4
3.1 并联电容器选择计算 4
3.2 高低压电容器柜的选择 4
3.3功率补偿计算 5
4变压器的台数、容量和类型的选择 7
4.1车间变压器选择原则 7
4.2选择车间变压器的台数、容量和类型 7
5电气主接线 8
5.1电气主接线的意义及重要性 8
5.2电气主接线的设计 9
5.3主接线方案的选择 10
6短路电流的计算 11
        6.1产生短路电流的原因、危害及计算方法 11
        6.2 短路电流点的计算 12
7高、低压电气一次设备的选择 17
7.1电气设备的选择对工厂企业的意义 17
       7.2电气设备的选择 17
       7.3电气设备的校验 17
   7.3.1对于高压设备器件的校验 18
   7.3.2低压侧电气设备的选择校验 20
8供配电线路的选择 21
8.1 变配电所进出线的选择 21
   8.1.1变配电所进出线的选择范围 21
   8.1.2变配电所进出线方式的选择 21
8.2配电线路的接线方式选择 21
      8.2.1高压配电线路接线方式选择 21
      8.2.2低压配电线路接线方式选择 22
   8.3 电线电缆选择与校验 23
9电力变压器的继电保护 25
9.1电力变压器的常见故障 25
9.2电力变压器的保护 25
9.2.1过电流保护 25
9.2.2电流速断保护 25
9.3 工厂变压器继电保护的计算 26
9.3.1反时限过电流保护 26
9.3.2电流速断保护 26
10.小结 28
参考文献 28