煤矿安全监控系统分级断电功能的实现

Realization of graded power-off in coal mine safety monitoring and control system

分析了综采工作面瓦斯超限分级断电的必要性,介绍了煤矿安全监控系统监控中心站软件中分级断电模块的设计和监控分站分级断电功能的实现方案。煤矿安全监控系统分级断电功能可在工作面瓦斯体积分数达到设定值时断掉断电优先级高的设备电源,降低了工作面瓦斯事故的发生概率,同时减少了带式输送机带负荷启动的情况。但该功能在发生瓦斯传感器断线故障时无法实现,同时增加了瓦斯传感器的调校复杂度。

Necessity of graded power-off was analyzed when gas overran on fully-mechanized mining face. Design scheme of graded power-off module in software of central station of coal mine safety monitoring and control system was introduced as well as graded power-off function of monitoring substation. The graded power-off function can cut off power supply for device with higher power-off priority when volume fraction of gas achieves set value, so as to reduce gas accidents and startup with load of belt conveyer. But the function cannot be realized when wire of gas sensor is cut off and makes adjustment of gas sensor more complicated.