煤矿供电系统防越级跳闸保护装置设计

Design of Protective Devices to Prevent Override Tripping in Power Supply System of Coal Mines

以煤矿供电系统越级跳闸现象为研究对象,在分析电流纵联差动保护和区域越级闭锁工作原理的基础上,介绍了一种防越级跳闸保护装置的设计方案。主要对保护装置的硬件总体结构进行了分析,并给出了防越级跳闸保护的控制逻辑和程序流程图的设计方案。该保护装置能够满足煤矿供电系统对越级跳闸防护的要求,可广泛应用于煤矿井下短距离供电系统。

The override tripping in power supply system of coal mines is investigated, and a new kind of protective device to prevent override tripping is introduced which based on the working principle analysis of current longitudinal differential protection and regional override blocking. It examined the design plan of hardware architecture, then proposed the design project of control logic and program flow chart for anti-override tripping protection. This kind of protective device could meet the requirements of power supply system in coal mines on anti-override tripping protection, and it could be widely used at underground mine power supply system in short distance.