电测与仪表2018，Vol.55Issue(1)：6-13,8.
基于纳秒级IFRA方法的变压器绕组变形检测研究
Investigation of nanosecond impulse frequency response analysis system for power transformer winding displacement detection
摘要
Abstract
A large amount of studies have shown that compared with sweep frequency response analysis (SFRA),the impulse frequency response (IFRA) is feasible for online condition monitoring of power transformer winding deformation,while nowadays,even offline IFRA still has many drawbacks,e.g.,the features of the injected impulse are not standardized and the sensitivity,reliability and reproducibility of IFRA are in question.In this paper,the features of impulses suitable for IFRA is extracted,and a novel de-noising method based on threshold wavelet de-noising is designed to extract appropriate IFRA response curves.Three levels of axial displacements were experimentally simulated on a distribution transformer.Both the IFRA system and a commercial SFRA analyzer were applied to obtain the frequency responses of the transformer at each fault level.Both the IFRA and SFRA measurement were conducted twice with two different connection schemes.Correlation coefficient and Euclidean distance are employed for the interpretation of IFRA frequency responses.The reliability,reproducibility and sensitivity of the developed IFRA system are verified through experimental studies.关键词
绕组变形/频率响应分析法/纳秒级脉冲Key words
winding displacement/frequency response analysis/nanosecond impulse分类
信息技术与安全科学引用本文复制引用
黄晶晶,唐文虎,周九江,辛妍丽..基于纳秒级IFRA方法的变压器绕组变形检测研究[J].电测与仪表,2018,55(1):6-13,8.基金项目
国家自然科学基金(51477054) （51477054）
国家高技术研究发展计划项目(863计划)(2015AA050201) （863计划）
