Results in Engineering • Vol 27
A proposed wavelet analysis based fault diagnosis scheme of power transformers using fault signatures and CT saturation
June 2025 • Amira M. Dahman, Adel A. Abou El‐Ela, Mohamed I. Zaki, Ragab A. El‐Sehiemy
Diagnosis of concealed internal faults within power transformer is a key for high grid reliability to ensure continuity of power supply to customers. One of the urgent situations of power transformer is the faults under CT saturation and the operation under inrush currents that lead to huge failure of fault identification of the power transformer. In this paper, a fault identification scheme is designed using details and approximate coefficients obtained by discreet wavelet transform applied to a differential curr…