一起线路故障导致主变后备保护动作跳闸的事件分析  

Analysis on an event of backup protection tripping caused bya line fault in a main transformer

作　　者：张燕 胡仁祥 孙嘉琪 胡阳 王明慧 ZHANG Yan;HU Renxiang;SUN Jiaqi;HU Yang;WANG Minghui(Mingjia Power Industy Co.,Ltd.,Turpan 838000,China;State Grid Turpan Power Supply Company,Turpan 838000,China)

机构地区：[1]明嘉电力实业有限公司,新疆吐鲁番838000 [2]国网吐鲁番供电公司,新疆吐鲁番838000

出　　处：《黑龙江电力》2023年第3期246-249,共4页Heilongjiang Electric Power

摘　　要：针对一起35 kV线路开关跳闸的问题,采用保护动作时序分析方法,进行线路、主变等相关保护装置报文、故障录波分析。结合现场检查与厂家技术人员分析,得出造成主变后备保护动作的原因为线路开关跳闸重合后,保护装置重启,后加速未动作造成越级跳闸。Aiming at the problem of a 35 kV line switch tripping,the protection action sequence analysis method is adopted,the message and fault recording analysis of relevant protection devices such as lines and main transformers are carried out.Combined with the on-site inspection and the analysis of the manufacturer's technicians,it is reached that the reason for the backup protection action of main transformers is that after the line switch trips and recloses,the protection device restarts,and then post-acceleration and does not act,resulting in skip tripping.

关 键 词：保护动作 线路故障 重合闸 后加速 

分 类 号：TM755[电气工程—电力系统及自动化]