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 …

As transformers age, their internal condition degrades, which increases the risk of failure. To
prevent these failures and to maintain transformers in good operating condition is a very …

Short circuit currents or forces during transport can cause mechanical displacements of
transformer windings. The transfer function method is presented as a tool to detect these …

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 …

The transfer function (TF) these days is a well-known method to detect different types of
mechanical damage in power transformers. The most important mechanical faults …

FRA tests in the frequency range up to 10 MHz were investigated using simulations and
measurements. It was found that the FRA test was more sensitive to changes in the …

Frequency response analysis (FRA) is an effective diagnostic tool for detecting transformer
winding movements. Various FRA traces can be measured from a set of transformer winding …

Introduction ower transformers are one of the most expensive elements in a power system,
and their failure is a very costly event. Power transformers are mainly involved in energy …

Frequency response analysis (FRA) is an emerging, powerful non-intrusive condition
monitoring and diagnostic tool for verifying the mechanical integrity of power transformers …

This contribution is aimed at obtaining diagnosis criteria for detection of low-level short
circuit faults throughout sweep frequency response analysis (SFRA) measurements on the …