主变压器零序过电压保护动作分析与对策  

Analysis and Countermeasures of Main Transformer Zero Sequence Overvoltage Protection Action

作　　者：肖俊先 王珂 李林山 董国琴 徐浩 XIAO Junxian;WANG Ke;LI Linshan;DONG Guoqin;XU Hao(Hunan Xiangdian Test and Research Institute Co.,Ltd.,Changsha 410004,China;State Grid Yueyang Power Supply Company,Yueyang 414000,China;State Grid Hunan Electric Power Research Institute of Electric Power Research,Changsha 410007,China)

机构地区：[1]湖南省湘电试验研究院有限公司,湖南长沙410004 [2]国网湖南省电力有限公司岳阳供电分公司,湖南岳阳414000 [3]国网湖南省电力有限公司电力科学研究院,湖南长沙410007

出　　处：《湖南电力》2020年第6期88-91,共4页Hunan Electric Power

摘　　要：以智能变电站主变压器零序过电压保护误动作事件为例,通过对故障波形、现场接线方式及二次回路进行分析,阐明零序过电压保护误动作的原因,指出变压器零序过电压保护整定及二次回路存在的问题,并有针对性地提出了变压器零序过电压保护的整改及预控措施,保证设备的可靠运行。Taking the recent misoperation of the zero-sequence overvoltage protection of the main transformer in the intelligent substation as an example,the causes of the misoperation of the zero-sequence overvoltage protection are explained through the analysis of the fault waveform,the field connection mode and the secondary circuit.This paper points out the problems existing in the setting of zero-sequence over-voltage protection and the secondary circuit of transformer,and puts forward the rectification and pre-control measures for zero-sequence over-voltage protection of transformer to ensure the reliable operation of equipment.

关 键 词：变电站 零序过电压 二次回路 寄生回路 应对措施 

分 类 号：TM774[电气工程—电力系统及自动化]