Results 21 to 30 of about 15,007 (312)

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

Very long distance connection of gigawatt size offshore wind farms: extra high-voltage ac versus high-voltage dc cost comparison [PDF]

open access: yes, 2016
This study presents a cost comparison between commercially available high-voltage DC (HVDC) and extra high-voltage AC shore connection (±320 kV voltage source converter and 420 kV-50 Hz single-core and three-core cables), for a 1 GW offshore wind farm ...
LAURIA, Stefano   +3 more
core   +1 more source

A soft‐switching inverting high step‐down converter with a pair of coupled inductors and self‐driven synchronous rectifier

open access: yesIET Power Electronics, 2021
In this paper, a non‐isolated coupled‐inductor high step‐down converter with extended duty cycle is proposed, which operates under discontinuous conduction mode.
Farzad Hosseinabadi   +6 more
doaj   +1 more source

Air‐core dry‐type shunt reactor protection based on an alternative current alpha plane

open access: yesIET Generation, Transmission & Distribution, 2021
This paper proposes an alternative current alpha plane protection for shunt reactors, which is able to identify internal faults, including turn‐to‐turn faults.
Maria Leonor Silva de Almeida   +2 more
doaj   +1 more source

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

open access: yes, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Ramírez, Jorge, Valecillos, Baudilio
core   +3 more sources

Study of the state of the issue of increasing the quality of electric energy in the power supply systems [PDF]

open access: yesE3S Web of Conferences, 2020
This article examines the importance of ensuring the quality of electricity and considers the possibility of using a system for monitoring the quality of electricity in the power supply system. Based on the results of the study, it was found that the use
Karimov Raxmatillo
doaj   +1 more source

On fully superconducting rectifiers and fluxpumps. A review. Part 2: Commutation modes, characteristics and switches [PDF]

open access: yes, 1981
This paper forms the second part of the review. Full and half wave superconducting transformer rectifiers are analysed. Modes of operation and loss mechanisms are detailed and a comparison between the behaviour of dynamos and rectifiers is presented ...
Kate, H.H.J. ten   +1 more
core   +2 more sources

Soft‐switching non‐isolated high step‐up three‐level boost converter using single magnetic element

open access: yesIET Power Electronics, 2021
Here, a soft switched three‐level boost converter with high voltage gain is proposed which is suitable for high step‐up applications with wide output power range.
Hamed Moradmand Jazi   +7 more
doaj   +1 more source

Generalised Tapped Inductor Switcher (GTIS) approach to modelling of high‐order converters

open access: yesIET Power Electronics, 2021
A generalized modelling technique suited to integrated and high order Pulse‐Width‐Modulation (PWM) topologies is studied and proposed here. Most integrated converters have their switches shared by more than one inductive element. The proposed generalised
Jia Yao   +3 more
doaj   +1 more source

Voltage harmonic reduction for randomly time-varying source characteristics and voltage harmonics [PDF]

open access: yes, 2006
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

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