配电网电磁式电压互感器运行故障分析及试验研究  

Analysis and Test Research on Operation Fault of Electromagnetic Voltage Transformer in Distribution Network

作　　者：洪新春 余银钢 吴喜生 HONG Xinchun;YU Yingang;WU Xisheng(Anhui Onesky Electric Tech,Co.,Ltd.,Hefei 230031,China)

机构地区：[1]安徽一天电气技术股份有限公司,安徽合肥230031

出　　处：《电工技术》2020年第20期118-119,共2页Electric Engineering

摘　　要：在配电网单相接地故障恢复瞬间,系统对地电容电荷重新分布,PT高压绕组流过的直流涌流导致PT铁芯严重饱和,造成PT熔丝熔断,甚至烧毁PT,影响系统运行安全。为此结合近年配电网现场运行情况和高压试验,分析PT熔丝熔断故障的主要原因,提出抑制PT直流涌流的方案。At the moment of single-phase grounding fault recovery in distribution network,the system capacitance charge to ground redistributes,and the DC inrush current flowing through Pt high-voltage winding leads to serious saturation of Pt core,resulting in PT fuse fusing and even burning Pt,which affects the operation safety of the system.For this reason,combined with the on-site operation of the distribution network and high-voltage tests in recent years,the main reasons for the PT fuse fusing failure were analyzed,and a plan to suppress the PT DC inrush ratio was proposed.

关 键 词：直流涌流 铁磁谐振 熔丝熔断 

分 类 号：TM451[电气工程—电器]