一种基于区域保护原理的防越级跳闸系统

介绍了一种基于区域保护原理的防越级跳闸系统,详细阐述了区域保护技术的基本思想及工作过程、保护闭锁信号产生及控制逻辑,并以某煤矿供电系统为例进行了实例分析。分析结果表明,基于区域保护原理的防越级跳闸系统使得井下变电所的继电保护不再依靠故障电流值和动作时间的配合,可准确快速地切除故障,实现保护选择性,大大提高了井下变电所的保护水平。

An Anti-Override Trip System Based on Principle of Zone Protection

The paper introduced an anti-override trip system based on principle of zone protection,described basic idea and working process of zone protection technology and generating and control logic of blocking signal in details,and analyzed an example of power supply system of a coal mine.The analysis result shows that anti-override trip system based on principle of zone protection makes the relay protection of underground substation no longer rely on coordinate of fault current value and operating time,which can cut off fault quickly and accurately to achieve protection selectivity and improve protection level of underground substation.