Results 21 to 30 of about 6,096 (326)

Prevention of the current transformer saturation by using negative resistance

IET 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

IET 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

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

IET 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, Behzad Soleymani, Ehsan Adib, Md. Rabiul Islam, Hosein Farzanehfard, Abbas Z. Kouzani, M. A. Parvez Mahmud   +6 more
doaj   +1 more source

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

IET 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, Larissa Marques Peres, Guilherme Gomes dos Santos   +2 more
doaj   +1 more source

Variable Reactance Criteria to Mitigate Voltage Deviations in Power Transformers in Light- and Over-Load Conditions

Machines, 2023
In this paper, variable reactance (VR) criteria are proposed to mitigate voltage deviations in power transformers under light-load inductive and capacitive conditions, as well as for over-load conditions.
Marta Haro-Larrode
doaj   +1 more source

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

E3S 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

Transformer and Reactor Life Management [PDF]

Cheim, Luiz, Gupta, Adish Kumar, MacArthur, Tara-Lee, Ryder, Simon   +3 more
openaire   +2 more sources

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

IET 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, Mahmoud Fekri, Milad Keshani, Ramin Rahimzadeh Khorasani, Ehsan Adib, Patrick Wheeler, Herminio‐Martinez Garcia, Guillermo Velasco‐Quesada   +7 more
doaj   +1 more source

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

IET 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, Jiang Ping, Kaisheng Zheng, Alexander Abramovitz   +3 more
doaj   +1 more source

Investigation on gas generation characteristics in transformer oil under vibration

IET Generation, Transmission & Distribution, 2022
Operating experience has shown that characteristic gases can be found in oil‐immersed power transformers and high‐voltage reactors under strong vibration without discharge or thermal faults occurring.
Chong Guo, Qiaogen Zhang, Rui Zhang, Xiaohui He, Zhicheng Wu, Tao Wen   +5 more
doaj   +1 more source