Soundness confirmation of internal windings of power transformers is important for reliable operation. In urgent situations such as invasions of lightning surge and external short‐circuit faults, it is important to diagnose turn shorts and/or deformation of winding. In this paper, criteria in diagnosing turn shorts or heavy deformations of transformer windings using frequency response analysis (FRA) are proposed. In FRA, measured transfer functions are compared with past measured data in principle. However, past measured data are not necessary in proposed diagnosis criteria. Therefore, proposed criteria are useful in soundness confirmation of transformer winding in the urgent situation.
Diagnosis Criterion of Abnormality of Transformer Winding by Frequency Response Analysis (FRA) ‐ Urgent Diagnosis of Turn Short and Heavy Deformation
Electrical engineering in Japan ; 201 , 3
2017
Article (Journal)
English
Diagnosis Criterion of Abnormality of Transformer Winding by Frequency Response Analysis (FRA)
Online Contents | 2017
|ABNORMALITY DIAGNOSIS SYSTEM AND ABNORMALITY DIAGNOSIS METHOD
European Patent Office | 2019
|ABNORMALITY DIAGNOSIS SYSTEM AND ABNORMALITY DIAGNOSIS METHOD
European Patent Office | 2021
|ABNORMALITY DIAGNOSIS SYSTEM AND ABNORMALITY DIAGNOSIS METHOD
European Patent Office | 2022
|ABNORMALITY DIAGNOSIS SYSTEM AND ABNORMALITY DIAGNOSIS DEVICE
European Patent Office | 2017
|