摘要:随着工厂自动化程度的提高，合理的工厂供电系统变得越来越重要，不仅可以保证工厂的正常生产，还能大大的节约电能降低产品的成本，提高生产效率。

　　　此工厂供电设计包括：负荷的计算及无功功率的补偿；变电所主变压器台数和容量、型式的确定；变电所主接线方案的选择；进出线的选择；短路计算和开关设备的选择；二次回路方案的确定及继电器保护的选择和整定；防雷保护与接地装置的设计；车间配电线路布线方案的确定；线路导线及其配电设备和保护设备的选择，电气主接线的设计。

　　　在设计中采用并联电容器的方法来补偿无功功率，以减少供电系统的电能损耗和电压损失，同时提高了供电电压的质量。从而使整个供电系统更具有其可靠性和灵活性。

关键词 变电所；短路计算；电气设备选择；继电保护

Abstract:With the development of factory automation，power supply system becomes more and more important. It not only can guarantee normal production of the factory ,but also reduce the cost of the products, save the electrical energy and increase productivity.

　　　The system nucleus of factory supplies power is transformer．It is very important to design and build one safe economical substation．This factory supplies power and designs including: Calculation of load and compensation of the inactive power; Transformer substation main voltage transformer platform count and capacity , sureness of pattern; Mainly wire the choice of the scheme in the transformer substation; Pass in and out the choice of the thread; Choice of shorting out and calculating and switchgear ; Two return circuit sureness and choice that relay protect of scheme exactly make; Defend the thunder and protect the design with the earth device ; The workshop distribution line connects up the sureness of the scheme. Circuit wire and distribution equipment and protecting the choice of the equipment; And the electric design that lighted, there is drawing of circuit diagram.

　　　At the same time the design uses shunt capacitor to compensation reactive power to decrease energy losses and voltage losses in the power supply system.It can also improve the quality of the power supply voltage. So the whole design of the power supply system becomes more reliability and flexibility.

Keywords   Substation  Short circuit calculation  Electrical equipment  Relay protection