Results 11 to 20 of about 1,224 (273)

Data Analysis Methodology Utilizing the Statistical Metrics Weight of Evidence (WoE) and Information Value (IV) to Assist in Asset Management of Power Transformers [PDF]

open access: yesIEEE Access
This article proposes an original contribution to assist in evaluating the condition of power transformers, the main asset of the electrical energy transmission sector. Due to constructive similarity, reactors are also evaluated. Data from the insulating
Gabriela S. Rema   +3 more
doaj   +2 more sources

A new magnetron driving method using a phase‐shifted active clamp forward converter for sulfur plasma tube applications

open access: yesIET Power Electronics, 2021
This paper presents a new method for driving the magnetron for a sulfur plasma tube using the two‐switch forward converter structure with a phase‐shifting active clamp (1000±40 W, 285 mA, 4 kV).
Abolfazl Nasiri, Mohamad Reza Banaei
doaj   +1 more source

Russian books on reactors, special transformers and related to transformer engineering - Part 3 [PDF]

open access: yes, 2022
In this column, we bring you a comprehensive list of Russian books related to reactors, special transformers as well as transformer engineering in general, from 1924 to ...
Gurin, Vitaly, Ramachandran, P.
core   +1 more source

Analysis of hybrid polarization frequency domain spectrum characteristics of oil‐paper insulation transformers

open access: yesIET Science, Measurement & Technology, 2021
This paper utilizes a hybrid Debye model to accurately simulate the relaxation response process of the oil‐paper insulation of a transformer to explore the application of frequency domain dielectric spectroscopy (FDS) in nondestructive diagnosis of the ...
Yang Zou   +3 more
doaj   +1 more source

DC breakdown characteristics and charges accumulation behaviour of thermally upgraded paper aged in natural ester

open access: yesIET Science, Measurement & Technology, 2021
Considering that the working temperature is much higher in high‐voltage direct‐current (HVDC) convert transformers than in conventional AC transformers, the combination of thermally upgraded paper and natural ester might be a better choice to withstand ...
Runhao Zou   +4 more
doaj   +1 more source

Ageing of DC conduction in thermally aged oil‐impregnated pressboard

open access: yesIET Science, Measurement & Technology, 2021
Ageing of the conduction process in a dielectric allows a better understanding of the phenomena. Available literature shows that the DC conductivity of oil impregnated pressboard increases with applied electric stress, particularly above 40 °C.
Nasirul Haque   +3 more
doaj   +1 more source

Partial discharge observation of a complex insulation structure model and residual space charge characteristics investigation under repeated lightning impulses

open access: yesIET Science, Measurement & Technology, 2021
In this research, the authors concentrated on a rarely studied part in the power transformer's insulation structure: the connection part of radial and axial spacers. An experimental model was constructed to simulate this part.
Li Lu   +2 more
doaj   +1 more source

Books on power transformers in Russian IV [PDF]

open access: yes, 2022
We present to you this last part of the bibliography of Russian books on power transformers. It is dedicated to reactors, special transformers and related to transformer engineering for the period 1980–April 2020.
Gurin, Vitaly, Ramachandran, P.
core   +1 more source

Prevention of the current transformer saturation by using negative resistance

open access: yesIET Generation, Transmission & Distribution, 2021
In the power grid, various conditions may occur that saturate the core of a current transformer. Saturation of the protection core of the current transformers can cause a malfunction in the protection relays.
Saeed Sanati, Yousef Alinejad‐Beromi
doaj   +1 more source

Experimental investigations using quadratic‐tripping characteristics based on alienation/coherence coefficients of voltage and current signals for synchronous generators protection

open access: yesIET Generation, Transmission & Distribution, 2021
A protection scheme is proposed using alienation method derived from coherence model which is a backup protection method for the differential overcurrent protection of synchronous generators.
Ragab A. Mahmoud, Ehab S. Elwakil
doaj   +1 more source

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