摘要
我国煤矿的供电系统普遍以单端辐射状供电为主,主要由地面变电所、井下中央变电所、采区变电所和配电点构成,供电系统复杂,串供级数多,越级跳闸现象频发。基于差动保护的区域集控式煤矿智能变电站防越级跳闸系统,结合采样值差动保护的优点,基于电流突变量的采样值差动保护,在保证快速性的前提下,提高了煤矿变电站防越级跳闸系统的可靠性;对系统的网络传输延时做了计算分析,利用OPNET仿真表明系统通信满足要求。
Power supply system of coal mine in China is given priority to single end radial power supply generally,which is mainly composed of substation ground,underground central substation,substation of mining area and the distribution point,with complex power supply system,multi series,frequently overstep tripping phenomenon. The system for preventing override trip of regional centralized mine intelligent substation based on differential protection,combined with the advantages of sampling value differential protection,based on sampling differential protection of sudden current change,improves the reliability of the system under the premise of ensuring rapidity. Finally,we analyze and calculate the network transmission delay for the system,which shows that the system meets the requirements of communication by OPNET simulation.
出处
《煤矿安全》
CAS
北大核心
2015年第8期92-95,共4页
Safety in Coal Mines
基金
江苏省普通高校研究生科研创新计划资助项目(SJLX_0633)
关键词
越级跳闸
智能变电站
电流突变量
差动保护
OPNET
override trip
intelligent substation
sudden change of current
differential protection
OPNET
