工厂变电所设计.docVIP

摘 要 电能是现代化工业生产的主要能源和动力，它对我们日常生活以及对社会的工业都起着重要的作用。随着社会的发展，电力系统的规模越来越大，结构越来越复杂。变电所作为电力系统中变化电压、交换功率和汇集分配电能的枢纽，随着电力系统电压等级的不断提高，网络日益复杂。它的作用尤为重要。因此，做好工厂供配电系统的设计对于发展工业生产，实现工业现代化，具有十分重要的意义。 本设计首先根据纺织厂电力负荷的分布和发展情况，结合地区电力规划，照顾当地农用和其他需要，考虑了分期建设、投资效果等各方面因素，进行了负荷统计与计算。然后对计算结果进行分析，并以此为根据进行变电所的主变压器台数和容量的选择，同时根据主接线的经济可靠、运行灵活的要求确定了变电站电气主接线方案。 其次进行了短路电流计算，从三相短路计算中得到当短路发生在各电压等级母线的短路电流和冲击电流的值，再根据计算结果及各电压等级的额定电压和最大持续工作电流进行主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器、开关柜等）。 最后，对本变电所的总体布局、继电保护方案以及变电所防雷接地保护方案进行了简要的论述。并绘制了本变电所电气主接线图、电气总平面布置图、继电保护系统图等相关设计图纸。 关键字： 变电所； 变压器； 主接线； 选型； 短路电流 Abstract The electrical energy is the energy and power of modern industrial production，it plays an important role in our daily life and society industrial. With the development of social, the scale of the power system is increasing; the structure is more and more complex. Substation to transform voltage power system, exchange of power and brings together a hub for distribution of electric energy. With the continuous improvement of power system voltage level, the increasing complexity of network, Its role is particularly important. Therefore, to do a factory to supply and distribution system design for the development of industrial production, industrial modernization, and has a very important significance. This design the first textile mill power load distribution and development, combined with regional power planning, to take care of the local agricultural and other needs to consider a phased construction, investment results and other factors, load statistics and computing. Then the calculation results were analyzed as the number of main transformer substation and capacity choice, while economical, reliable and flexible operation of the main wiring requirements determine the main wiring of the electrical substation Followed by a short-circuit current calculated from the three-phase short-circuit calculations when short circuit occurs in short circuit current and the impact of the current value of the voltage leve