基于Siemens S7系列PLC控制的6kV备用电源自动投入装置改造

Modification of 6kV Automatic Stand-By Power Switching Device for Siemens S7 PLC Controller

化工生产的连续性对供电的可靠性要求很高,传统的自动装置由于采用了大量的中间继电器、时间继电器等元件,影响了供电系统的可靠性。本文给出了双回路供电的6 kV变电所的备用电源自动投入装置采用PLC控制的解决方案,大大提高了供电的可靠性。

The continuity of chemical production demands for the reliability of electricity supply. Because of large number of intermediate relay and time relay etc., applied in traditional automatic devices, the reliability of electricity supply is adversely affected. The solution is put forward that automatic stand-by power switching device for double circuit power supply in 6 kV substation should be controlled by PLC （based on Siemens S7 series）, to improve the reliability of electricity supply greatly.