Results 21 to 30 of about 792,099 (261)

Optimal coordination of directional overcurrent relay based on combination of Firefly Algorithm and Linear Programming

Ain Shams Engineering Journal, 2022
Optimal coordination and settings of directional overcurrent relays (DOCRs) are crucial task to ensure reliable and effective protection in power system networks. The settings of DOCRs are plug setting current (PSC) and time multiplier setting (TMS). The
Suzana Pil Ramli, Hazlie Mokhlis, Wei Ru Wong, Munir Azam Muhammad, Nurulafiqah Nadzirah Mansor   +4 more
doaj   +1 more source

An Improved Technique of Hybridization of PSO for the Optimal Coordination of Directional Overcurrent Protection Relays of IEEE Bus System

Energies, 2022
The use of a directional overcurrent protection relay (DOPR) to protect an electrical power system is a crucial instrument for keeping the system dynamic and avoiding undue interruption.
Kashif Habib, Xinquan Lai, Abdul Wadood, Shahbaz Khan, Yuheng Wang, Siting Xu   +5 more
doaj   +1 more source

Optimal Coordination of Directional Overcurrent Relays for Microgrids Using ‎Hybrid Interval Linear Programming - Differential Evolution [PDF]

Journal of Operation and Automation in Power Engineering, 2022
The relay coordination problem of directional overcurrent has  been an  active research issue in distribution networks and power transmission. In general, the problem of relay coordination is the nonlinearity of the optimization problem, which increases ...
P. Omidi, S. Abazari, S.M. Madani
doaj   +1 more source

Cross-calibration of a combined electrostatic and time-of-flight analyzer for energy- and charge-state-resolved spectrometry of tin laser-produced plasma

Applied physics B, 2022
We present the results of the calibration of a channeltron-based electrostatic analyzer operating in time-of-flight mode (ESA-ToF) using tin ions resulting from laser-produced plasma, over a wide range of charge states and energies.
L. Poirier, A. Bayerle, A. Lassise, F. Torretti, R. Schupp, L. Behnke, Y. Mostafa, W. Ubachs, O. Versolato, R. Hoekstra   +9 more
semanticscholar   +1 more source

Fiscal multipliers in South Africa after the global financial crisis

South African Journal of Economic and Management Sciences, 2022
Background: South Africa’s fiscal position has deteriorated considerably over the last 10 years, with debt levels reaching historical highs in the post-apartheid period.
Theo Janse van Rensburg, Shaun de Jager, Konstantin Hristov Makrelov   +2 more
doaj   +1 more source

Automatic Overcurrent Protection Coordination after Distribution Network Reconfiguration Based on Peer-To-Peer Communication

Energies, 2021
Electrical power systems represent a fundamental part of society, and their efficient operations are of vital importance for social and economic development.
Alex Valenzuela, Silvio Simani, Esteban Inga   +2 more
doaj   +1 more source

The Hybridization of PSO for the Optimal Coordination of Directional Overcurrent Protection Relays of the IEEE Bus System

Energies, 2023
The hybridization of PSO for the Optimal Coordination of Directional Overcurrent Protection Relays (DOPR) of the IEEE bus system proposes a new method for coordinating directional overcurrent protection relays in power systems.
Yuheng Wang, Kashif Habib, Abdul Wadood, Shahbaz Khan   +3 more
doaj   +1 more source

An accurate retransmission timeout estimator for content-centric networking based on the Jacobson algorithm

Digital Communications and Networks, 2022
Accurately estimating of Retransmission TimeOut (RTO) in Content-Centric Networking (CCN) is crucial for efficient rate control in end nodes and effective interface ranking in intermediate routers.
Mortaza Nikzad, Kamal Jamshidi, Ali Bohlooli, Faiz Mohammad Faqiry   +3 more
doaj   +1 more source

Stochastic dynamics for inextensible fibers in a spatially semi-discrete setting [PDF]

, 2017
We investigate a spatially discrete surrogate model for the dynamics of a slender, elastic, inextensible fiber in turbulent flows. Deduced from a continuous space-time beam model for which no solution theory is available, it consists of a high ...
F. Lindner, N. Marheineke, Holger Stroot, A. Vibe, R. Wegener   +4 more
semanticscholar   +2 more sources

The use of fault current limiter to reduce the operating time of relays [PDF]

مجله مدل سازی در مهندسی, 2018
In distribution network with displacement at network level, the fault current does not significantly change and it is not possible to effectively utilize the inverse time over-current relays, since, if the number of primary and backup relays increases ...
Ehsan Khoob, Mahdi Ghazizadeh-Ahsaee, Mehrdad Zandi Dare Gharibi   +2 more
doaj   +1 more source