Diagnostic measurements for power transformers
S Tenbohlen, S Coenen, M Djamali, A Müller… - Energies, 2016 - mdpi.com
With the increasing age of the primary equipment of the electrical grids there exists also an
increasing need to know its internal condition. For this purpose, off-and online diagnostic …
increasing need to know its internal condition. For this purpose, off-and online diagnostic …
Frequency response analysis (FRA) of transformers as a tool for fault detection and location: A review
RK Senobari, J Sadeh, H Borsi - Electric power systems research, 2018 - Elsevier
Power transformers are one of the most important components of the electrical power
networks. A wide range of mechanical and electrical stresses in addition to the aging could …
networks. A wide range of mechanical and electrical stresses in addition to the aging could …
Understanding power transformer frequency response analysis signatures
The majority of transformers currently in service worldwide were installed prior to 1980, and
consequently most of them are approaching or have already exceeded their design lifetimes …
consequently most of them are approaching or have already exceeded their design lifetimes …
Transformer winding faults classification based on transfer function analysis by support vector machine
This study presents an intelligent fault classification method for identification of transformer
winding fault through transfer function (TF) analysis. For this analysis support vector …
winding fault through transfer function (TF) analysis. For this analysis support vector …
Modeling power transformers to support the interpretation of frequency-response analysis
SD Mitchell, JS Welsh - IEEE Transactions on power delivery, 2011 - ieeexplore.ieee.org
A power transformer will yield a frequency response which is unique to its mechanical
geometry and electrical properties. Changes in the frequency response of a transformer can …
geometry and electrical properties. Changes in the frequency response of a transformer can …
A new transformer FRA measurement technique to reach smart interpretation for inter-disk faults
Transformers are utilized in generation, transmission, and distribution power system
network, and face an enormous number of hazards during their course of operation …
network, and face an enormous number of hazards during their course of operation …
Optimal power system dispatch with wind power integrated using nonlinear interval optimization and evidential reasoning approach
This paper presents the nonlinear interval optimization (NIO) model to solve optimal power
system dispatch (OPSD) with uncertain wind power integrated. In this model, not only the …
system dispatch (OPSD) with uncertain wind power integrated. In this model, not only the …
High frequency electric circuit modeling for transformer frequency response analysis studies
Power transformers are subject to winding and core deformations due to short circuit faults
and other environmental conditions. Majority of these faults are of progressive nature and …
and other environmental conditions. Majority of these faults are of progressive nature and …
Online transformer internal fault detection based on instantaneous voltage and current measurements considering impact of harmonics
AS Masoum, N Hashemnia… - … on Power Delivery, 2014 - ieeexplore.ieee.org
This paper investigates the performance of a recently proposed online transformer internal
fault detection technique and examines the impact of harmonics through detailed nonlinear …
fault detection technique and examines the impact of harmonics through detailed nonlinear …
Effect of different connection schemes, terminating resistors and measurement impedances on the sensitivity of the FRA method
Frequency-response analysis (FRA) is an efficient method to examine the mechanical
integrity of a power transformer. Different connection schemes can be implemented for …
integrity of a power transformer. Different connection schemes can be implemented for …