可编程控制器在变电站馈电线路保护中的应用及程序设计

Application of programmable logic controller to substation's feeder protection and program design

简要论述了在变电站继电保护中应用可编程控制器（ Ｐ Ｌ Ｃ） 的必要性，介绍了一种国外先进的内置 Ｐ Ｌ Ｃ 继电保护装置的结构特点．并结合实际工程的低频减载和自动重合闸方案设计，详细说明了可编程控制器在变电站馈电线路保护中应用程序的编制方法．

This paper indicates the necessity of applying programmable logic controller to substation relay protection, analyses the property of one kind of advanced relay protection equipments based on PLC. Combined with low frequency shut load and auto recloser in practical project, and illustrates programming methods in conformity with regulation.