基于PLC的变电站备用电源自动投入装置控制程序的研究

Research on the Control Program of the Automatic Switch in Device of the Standby Power Supply in the Substation Based on PLC

在电力系统中,为满足电网经济运行及可靠性,在开环运行的变电站装设备用电源自动投入装置,以保证主供电源发生故障时,启用备用电源迅速恢复对用户的正常供电。对备用电源自动投入装置的工作要素、控制原理分析,并以某变电局110KV电网中“一线两站”的备用电源自动投入装置为例,基于PLC进行控制程序的设计应用。

In the power system,in order to meet the economic operation and reliability of the power grid,an automatic power input device is installed in the open-loop operation substation to ensure that when the main power supply fails,the standby power supply can be used to quickly restore the normal power supply to the user.In this paper,the working elements and control principle of the standby power automatic input device are analyzed.Taking the standby power automatic input device of"one line and two stations"in 110kV power grid of a substation as an example,the control program is designed and applied based on PLC.