一种基于PLC的交流所用电系统

An auxiliary AC power supply system based on PLC

交流所用电系统是变电所重要的组成部分,交流所用电系统供电可靠性直接影响到变电所设备的正常运行。从硬件、软件及运行方式等方面介绍了一种新型的基于可编程控制器(PLC)的交流所用电系统。PLC自身具备可靠性、灵活性、易操作性的特点,利用PLC控制转换开关(ATS)可实现交流所用电系统的多种运行功能。这种交流所用电系统不但克服了传统所用电系统安全性差的问题,而且还提供了更多的运行方式和与远方计算机通信的功能,满足了无人值班变电所的运行要求。

Auxiliary AC power supply system is an important part in substation. The stable operation of substation equipments depends on reliability of AC power supply system. A new type of such system based on PLC was introduced, both hardware and software of the system were discussed in detail. Using Auto Tumbler Switch （ATS） controlled by PLC, this system can operate in more different modes. According to the reliability, flexibility and facility of PLC, the security problem in traditional auxiliary power system can be overcome. The new system is capable of communicating with remote computers, which is suitable for unattended substation.