基于PLC备用电源自动投入装置的实现

Realizing of the automatic switching devices for standby power supply based on PLC

备用电源自动投入装置在电力系统中应用广泛,应用可编程逻辑控制器(PLC)可实现备用电源自动投入。对内桥主接线的4种备自投情况进行了分析,因其充放电条件各不相同,故4种备自投情况可以通过软件编程集中实现,与传统的继电器组成的备用电源自动投入装置相比,该装置具有可靠性高、灵活性好、接线简单、调试方便和投资小等优点。

Automatic standby power supply switching device is applied in power system widely. The device can be realized by using PLC. The four cases of automatic standby power supply switching of internal bridge main connection were analyzed. Because of the difference between charge and discharge condition of the four cases, they can be realized by means of software programming of PLC. The device has merits of high reliability, flexible controlling, simple connection mode, convenient debugging and economical investment compared with the same conventional device constructed by using relays.