精品文档---下载后可任意编辑本论文主要是对小型工厂供配电系统的电气部分进行设计。工厂由户外引入 10kV 的高压电源，经过工厂变电所降为 220/380V 的低压电，直接供给工厂车间的动力系统和照明系统。在选择电气设备之前，先对工厂负荷进行计算，确定工厂总的负荷容量，同时在低压母线侧进行无功功率的补偿，以提高功率因数。根据补偿后的负荷容量，选择工厂变电所变压器的容量和台数，然后确定工厂采纳的供电系统，选择合适的车间配电方案，画出供配电系统主接线图。高压一次设备、低压一次设备和导线截面积选择时，都必须满足电路正常条件下和短路故障条件下工作的要求。电气设备不仅要满足在短路故障条件下的工作要求，还必须按最大可能的短路故障时的动稳态度和热稳态度进行校验，以推断设备是否满足工作要求。电路发生三相短路时的短路电流电流最大，计算三相短路电流，以进行设备的校验。最后，进行继电保护和防雷接地，来提高系统的安全性和可靠性。关键词：负荷计算，三相短路，主接线，继电保护精品文档---下载后可任意编辑AbstartThis thesis is mainly to the small factory power supply system of the electric part design. The factory from outdoor into 10 kv high-voltage power supply, through the factory substation reduced to 220/380 v low voltage electric, direct supply factory workshop of power system and lighting system.In the selection of electrical equipment, before the factory load calculation, determine the factory total load capacity, and at the same time, in the low voltage bus side for reactive power compensation, in order to improve power factor. According to the compensation after the load capacity, choose the factory substation transformer capacity and sets, and then determine the factory power supply system, choose appropriate workshop distribution plan, draw for distribution system main wiring .High pressure a equipment, low pressure a equipment and wire .Keywords: load calculation, three phase short circuit, Lord, relaying protection目录摘要.........................................
