新型煤矿供电网防越级跳闸保护装置的研制

Development of Protection Device to Prevent Override Tripping in Power Supply Network of Coal Mines

以煤矿供电网越级跳闸现象为研究对象,在分析电流纵联差动保护、级联闭锁工作原理和防越级跳闸保护逻辑的基础上,介绍了一种煤矿供电网防越级跳闸保护装置的研制过程。保护装置以32位ARM处理器MB9BF618S为控制核心,可以实时检测供电网输电线路的工作状态,对输电线路故障进行有效的保护。该保护装置具有结构简单、操作方便、可靠性高等特点,能够满足煤矿供电网防越级跳闸保护的要求,具有较高的应用价值。

Based on the working principle analysis of current longitudinal differential protection, and cascade blocking of working principle and protective logic for anti-override tripping, an anti-override tripping protection device is presented in considering the override trip in power supply network of coal mines. This protection device uses the 32- bit ARM processor MB9BF618S as the core component, it is able to monitor the transmission line status, to provide protection for the power supply network of coal mines. This protection device could meet the requirements of power supply system in coal mines on anti-override tripping protection and has higher application value, which has the features of simple structure, easy operation, and high reliability.