Results 11 to 20 of about 13,342,243 (92)

Analytical methods for assessing paper degradation In transformers [PDF]

open access: yes, 2006
Power transformers are essential equipments for distributing electricity. However, maintenance of these equipments is necessary to ensure long working life and to avoid catastrophic incidents.
Christofidis, Stavros
core   +7 more sources

UHF diagnostic monitoring techniques for power transformers [PDF]

open access: yes, 2004
This paper initially gives an introduction to ultra-high frequency (UHF) partial discharge monitoring techniques and their application to gas insulated substations.
Bennoch, C.J.   +3 more
core   +3 more sources

Development of an integrated low-power RF partial discharge detector [PDF]

open access: yes, 2009
This paper presents the results from integrating a low-power partial discharge detector with a wireless sensor node designed for operating as part of an IEEE 802.15.4 sensor network, and applying an on-line classifier capable of classifying partial ...
Stephen, B.   +7 more
core   +4 more sources

The response of transformers to geomagnetically induced- like currents [PDF]

open access: yes, 2014
Includes bibliographical references.This dissertation discusses the development and implementation of a rigorously developed protocol for characterizing and testing transformers with GIC-like currents based on their magnetization curve characteristics ...
Chisepo, Hilary K
core   +1 more source

A measurements-based discharge location algorithm for plain disc winding power transformers [PDF]

open access: yes, 2005
A measurements-based electrical method for locating partial discharges (PD) in transformers is described in the paper. This location method relies on the series resonance frequencies of the signals produced at the transformer terminals by a discharge on ...
Wang, Zhongdong D.   +5 more
core   +1 more source

Superconducting transformers

open access: yes, 2013
The advent of high-temperature superconducting (HTS) materials has renewed interest in the possibilities for superconducting power apparatus offering real economic benefit, within power ratings typical of present system practice.
Sykulski, Jan K.
core   +1 more source

A frequency-based RF partial discharge detector for low-power wireless sensing [PDF]

open access: yes, 2010
Partial discharge (PD) monitoring has been the subject of significant research in recent years, which has given rise to a range of well-established PD detection and measurement techniques, such as acoustic and RF, on which condition monitoring systems ...
Baker, P.C.   +2 more
core   +4 more sources

Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers

open access: yes, 2023
Power grids are a combined system where the electrical energy produced by the power plants is transmitted to consumers. This forms a specific interdependence where the recipients have a significant impact on the power quality.
Ernest Stano, Michal Kaczmarek
core   +1 more source

Investigation of propagation of partial discharges in power transformers and techniques for locating the discharge [PDF]

open access: yes, 2005
The location of partial discharges in a power transformer can be determined based on the characteristics of the transfer function from the discharge source to the measuring terminal.
Crossley, P.A.   +5 more
core   +1 more source

Augmented Models of High-Frequency Transformers for SMPS [PDF]

open access: yes, 2009
The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Savi, Patrizia   +3 more
core   +1 more source

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