基于PLC的备用电源自投装置的设计与实现

The Design and Implementation of Backup Power Automatic Switchover Unit Based on PLC

本文针对工矿企业变电所,提出了采用可编程控制器实现备用电源自投装置的新技术,在实际应用中具有控制方式灵活,编程简便,抗干扰性强等诸多优点。出口电路中采用微型大功率继电器与特定的程序相结合,克服了烧毁继电器结点的难题。大幅度地降低了设备的运行、维护成本,提高了工矿企业变电所的安全和经济效益。

The paper proposes the design of backup power automatic switchover unit based on PLC for the substation of industrial and mining enterprises. It has many merits, such as flexible control, simple programme and strong anti-interference in practice. The design taking an powerful miniature relay in output circuit and combining with the special programme resolves the arc problem of relay contact. This system can largely decrease the cost of operation and maintenance, enhance the reliability and economic benefit of substation.