电测与仪表2018，Vol.55Issue(3)：25-30,6.
极坐标图像法用于检测变压器绕组的微小辐向变形故障
Polar image method used for detecting the minor radial deformation fault of transformer winding
摘要
Abstract
Frequency response analysis is always considered to be a prospective method to diagnose power transformer winding deformation fault,however,the most existing frequency response analysis just uses the amplitude information of frequency response,and ignores the characteristic of phase variation.However,as for some types of winding fault,such as winding minor radial deformation,the sensitivity of diagnosing fault is not high enough.Thus,this paper proposes a new polar image method,the frequency response is used to construct the polar image,which assists to diagnose winding deformation fault.A case study of winding equivalent electrical model is carried out,the result demonstrates that the proposed method may detect winding fault more effectively,while the normal frequency response analysis can't reflect the winding minor radial deformation fault,the polar image method has higher sensitivity of diagnosis.关键词
变压器/绕组变形/频率响应分析法/极坐标图像Key words
transformer/winding deformation/frequency response analysis method/polar image分类
信息技术与安全科学引用本文复制引用
宋慧欣,张义华,李皓然,王冬梅..极坐标图像法用于检测变压器绕组的微小辐向变形故障[J].电测与仪表,2018,55(3):25-30,6.基金项目
国家自然科学基金资助项目(51607042) （51607042）
