Signal processing can be found in many applications and its primary goal is to provide
underlying information on specific problems for the purpose of decision making. Traditional …

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 …

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 …

Undetected short circuit faults are a significant problem in power transformers and can
eventually develop into catastrophic faults. At present, frequency response analysis (FRA) is …

The subject matter of this paper refers to the improvement of the acoustic emission (AE)
method when used for detection, measurement and location of partial discharges (PDs) in …

Finding the phase to ground faults in ungrounded distribution systems is very difficult and
time consuming. In recent years, the advances in power electronics favor DC distribution …

Accurate diagnosis of faults in transformers can significantly enhance the safety, reliability,
and economics of power systems. In the case of a fault, it has been established that the …

In this paper, two new schemes are proposed for insulation failure detection in power
transformer windings. In the first step, a real high frequency HV transformer winding is …

Power transformers are the most expensive pieces of equipment in a power substation. It is
very important to prevent failures and detect problems in a transformer as early as possible …

This paper presents a combined discrete wavelet transform (DWT) and support vector
machine (SVM) technique for mechanical failure classification of spherical roller bearing …