低压供用(yong)电(dian)(dian)(dian)(dian)(dian)系(xi)(xi)(xi)统(tong)中(zhong)(zhong)，发(fa)(fa)电(dian)(dian)(dian)(dian)(dian)机、电(dian)(dian)(dian)(dian)(dian)动(dong)机在(zai)运行(xing)中(zhong)(zhong)发(fa)(fa)生单相(xiang)接(jie)地(di)(di)是最常见的故(gu)障，故(gu)障点(dian)出现(xian)电(dian)(dian)(dian)(dian)(dian)弧接(jie)地(di)(di)时会进一步(bu)扩大定(ding)子绕组绝缘损害甚至(zhi)导致铁芯灼(zhuo)伤(shang)烧结，如不及时发(fa)(fa)现(xian)并(bing)快速切除，故(gu)障将(jiang)发(fa)(fa)展成为相(xiang)间(jian)或匝间(jian)短路。基于上(shang)述原因，国际广泛(fan)采用(yong)发(fa)(fa)电(dian)(dian)(dian)(dian)(dian)机、电(dian)(dian)(dian)(dian)(dian)动(dong)机中(zhong)(zhong)性点(dian)高阻接(jie)地(di)(di)，以限制接(jie)地(di)(di)电(dian)(dian)(dian)(dian)(dian)流，防止各种过电(dian)(dian)(dian)(dian)(dian)压的危害，取得了良好的运行(xing)经(jing)验；从20世纪90年代(dai)开始，中(zhong)(zhong)性点(dian)经(jing)电(dian)(dian)(dian)(dian)(dian)阻接(jie)地(di)(di)方式在(zai)我国配电(dian)(dian)(dian)(dian)(dian)网(wang)系(xi)(xi)(xi)统(tong)中(zhong)(zhong)，目前已广泛(fan)地(di)(di)应(ying)用(yong)于我国城市供电(dian)(dian)(dian)(dian)(dian)系(xi)(xi)(xi)统(tong)、电(dian)(dian)(dian)(dian)(dian)厂、地(di)(di)铁、冶(ye)金及石化(hua)等(deng)系(xi)(xi)(xi)统(tong)。
