A control method and its feature of automatic circuit close device for 330 kV backup power at Xining transformer substation are introduced,and its control part has been designed by using high reliable programmable logic controller (PLC).

• 介绍了西宁西郊变电站备用电源自动投入装置的控制方案和特点,并采用可靠性高的可编程逻辑控制器(简称PLC)对变电所330kV备用电源自动投入装置的控制进行了设计。