低压厂用变压器高压侧负序过流保护整定  

Study on high side negative-sequence over-current protection setting of low-voltage station service transformer

作　　者：王旅 

机构地区：[1]湖北华电襄阳发电有限公司,湖北襄阳441041

出　　处：《华电技术》2016年第7期60-61,共2页HUADIAN TECHNOLOGY

摘　　要：分析了Dyn11联结组别的低压厂用变压器两侧电流的关系,通过计算低压母线不对称短路时高压侧负序电流的大小,按照保护灵敏度要求,确定负序过流保护的整定原则。最后,通过实际算例,指出了负序过流保护与下一级保护的配合关系。The relationship of both side current of LV plant service transformer Dyn11 connection was analyzed. By calculating the asymmetric short-circuit current of HV side,negative current protection adjustment principle was confirmed[1]. Finally,cooperative relationship of negative current protection and next stage protection was indicated.

关 键 词：变压器 负序过流保护 整定 

分 类 号：TM862[电气工程—高电压与绝缘技术]