Results 101 to 110 of about 1,701,822 (335)

Sparse Linear Models applied to Power Quality Disturbance Classification

open access: yes, 2015
Power quality (PQ) analysis describes the non-pure electric signals that are usually present in electric power systems. The automatic recognition of PQ disturbances can be seen as a pattern recognition problem, in which different types of waveform ...
López-Lopera, Andrés F.   +2 more
core   +1 more source

Service and Voltage Sag Study of Humid and Dry Weather Utilities [PDF]

open access: yes, 2002
This paper compares the voltage sag severity problems of two typical utilities operating in humid and dry hot environments. Based on power quality data and its analysis, it has been attempted to compare the quality of services to the customers of humid
Bashi, Sinan Mahmod   +3 more
core  

On Phasor Estimation for Voltage Sags Detection in a Smart Grid Context [PDF]

open access: yes, 2015
International audienceThe advent of smart grids have urged a radical reappraisal of distribution networks and power quality requirements, and effective use of the network are indexed as the most important keys for smart grid expansion and deployment ...
Amirat, Yassine   +2 more
core   +4 more sources

Voltage sag state estimation based on l_1-norm minimization methods in radial electric power distribution system

open access: yesRevista UIS Ingenierías, 2018
Voltage sags have a high impact on the proper equipment operation and the electric power end-user processes continuity. Economic losses are a growing problem for the electric utilities, regulators and electric energy final customers and therefore, the ...
Jairo Blanco-Solano   +4 more
doaj  

Enhanced Rheological and Filtration Performance of Drilling Fluids Using Fe3O4/Saponin/Cu(II) Nanocomposites: Synthesis, Characterization, and Application

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Drilling fluids used in high‐performance well operations often struggle to maintain rheological stability, colloidal dispersion, and filtration control under harsh downhole conditions. This study engineered a multifunctional Fe3O4@Saponin/Cu(II) nanocomposite to address these challenges.
Kassem Al Attabi   +9 more
wiley   +1 more source

Compansation of Electrical Voltage in Distribution System by Dynamic Voltage Restorer

open access: yesJAREE (Journal on Advanced Research in Electrical Engineering), 2019
Electrical ac power systems consist of generation systems, transmission and distribution networks. The large three phase industrial loads at various distribution and transmission voltages as well as single-phase residential and commercial loads are ...
Soe Soe Ei Aung, May Phone Thit
doaj   +1 more source

Output Impedance Diffusion into Lossy Power Lines [PDF]

open access: yes, 2017
Output impedances are inherent elements of power sources in the electrical grids. In this paper, we give an answer to the following question: What is the effect of output impedances on the inductivity of the power network?
De Persis, Claudio   +3 more
core   +3 more sources

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

open access: yesThe Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro   +7 more
wiley   +1 more source

‘SOMS BrainSpace’: A digital serious game for undergraduate neuroscience

open access: yesAnatomical Sciences Education, EarlyView.
Abstract Neuroanatomy is challenging for many undergraduates, requiring strong visuospatial skills and a deep understanding of complex concepts. This study developed and evaluated SOMS BrainSpace, a digital serious game for neuroanatomy education, using a mixed methods approach.
Anthony Tran   +3 more
wiley   +1 more source

Voltage sag assessment method considering low-voltage ride-through of inverter-interfaced distributed generators

open access: yesInternational Journal of Electrical Power & Energy Systems
Voltage sags often disrupt the normal functioning of sensitive equipment and distributed generators (DGs), making voltage sag mitigation based on corresponding assessments crucial. Voltage sag characteristics, including voltage magnitude and sag duration,
Xian-yong Xiao   +3 more
doaj   +1 more source

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