This paper presents the current status and future trends in the application of the frequency-
response analysis (FRA) technique with the transformer in service (online) through …

On-line monitoring and diagnosis of transformers have been investigated and discussed
significantly in last decade. This study has concentrated on issues arising while on-line …

Interturn faults are a significant problem in power transformers that can eventually burgeon
into catastrophic faults and likely result in an overall network failure. The main problem with …

Increasing distributed energy resources, especially the renewable energy resources (RESs)
are being installed across power systems these years. These RESs, including solar …

A novel approach using the short-time Fourier transform and wavelet transform (time–
frequency analysis tools) for fault detection during impulse testing of power transformers is …

Detection of major faults in power transformers during impulse tests has never been an
issue, but is rather difficult when only a minor fault, say a sparkover between adjacent coils …

GAMMEU1 constitutes an integrated approach that covers the different elements related to
the asset management of power transformers in the environment of a utility. GAMMEU …

Both, on-and off-line measurements have been performed through the last years on several
large power transformers. This paper describes the most recent developments of sensor …

An electronic voltage transformer with self-integral D-dot sensor is proposed for measuring
high-voltage signals based on the principle of the D-dot measurement. The D-dot sensor …

The online monitoring of the transformer winding using scattering parameters fingerprint is
presented. As a test object, a simplified model of transformer is used. The winding axial …