相敏保护在负荷控制中心的研究应用  

Research and application of phase-sensitive protection in load control center

作　　者：郑丽君[1] 宋建成[1] 高云广[2] 耿蒲龙[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024 [2]太原科技大学信息工程学院,山西太原030024

出　　处：《煤炭学报》2012年第6期1056-1060,共5页Journal of China Coal Society

基　　金："十一五"国家科技支撑计划重点资助项目(2007BAB13B01;2007BAK29B05);山西省青年自然科学基金项目(2011021015-1)

摘　　要：对比了电动机起动与三相短路故障的电气特性,设计了基于功率因数与电流值合成的相敏型三相短路保护电路,进行了数据测试,分析了保护特性,并将其应用于KJZ-4000-10(6)/3.3矿用隔爆兼本质安全型负荷控制中心。运行结果表明,相敏保护电路可有效区别电动机起动电流与三相短路电流,动作稳定灵敏,从未发生误动或拒动现象,实现了对矿井电网的可靠短路保护。According to the field requirements, the electrical characteristics between motor starting and three phase short-circuit were compared, the phase-sensitive protection circuit based on the synthesis of power factor and current amplitude was designed, the protection data was tested and the protection characteristic was analyzed. The phase-sensitive protection circuit was uesd in K3Z-4000-10 （6）/3.3 flameproof and intrinsically safe load control center. The circuit can effectively distinguish motor starting current and three-phase short-circuit current and is stable, sensitive and reliable. It is proved that the short-circuit protection of power in underground is reliably realized.

关 键 词：相敏保护 负荷控制 短路故障 综采工作面 

分 类 号：TD611[矿业工程—矿山机电]