Results 21 to 30 of about 1,424,911 (262)

Modelling and analysis of three-phase grid-tied photovoltaic systems

open access: yesJournal of Electrical Systems and Information Technology, 2023
The global warming of the planet is as a result of human activities. Fossil fuel depletion and its high prices have caused a worldwide economic instability; governments around the world turn to alternative energy sources that are pollution-free.
Abraham Dandoussou, Pierre Kenfack
doaj   +1 more source

An Efficient Phase-Locked Loop for Distorted Three-Phase Systems

open access: yesEnergies, 2017
This paper proposed an efficient phase-locked loop (PLL) that features zero steady-state error of phase and frequency under voltage sag, phase jump, harmonics, DC offsets and step-and ramp-changed frequency. The PLL includes the sliding Goertzel discrete
Yijia Cao   +4 more
doaj   +1 more source

Progressive Antithrombin: A Three-Phase System [PDF]

open access: yesBlood, 1966
Abstract 1. Data are presented which demonstrate that progressive antithrombin activity results from the interaction of three factors: antithrombin, an antithrombin inhibitor, and a platelet factor. In plasma, the antithrombin is held inactive by combination with inhibitor so that no free antithrombic activity is present.
H H, Henstell, M, Kligerman
openaire   +2 more sources

Time-domain Dynamic State Estimation for Unbalanced Three-phase Power Systems

open access: yesJournal of Modern Power Systems and Clean Energy, 2023
In this paper, we present a time-domain dynamic state estimation for unbalanced three-phase power systems. The dynamic nature of the estimator stems from an explicit consideration of the electromagnetic dynamics of the network, i.e., the dynamics of the ...
Martin Pfeifer   +5 more
doaj   +1 more source

Three-Phase Load Balancing in Distribution Systems Using Load Sharing Technique

open access: yesEngineering Proceedings, 2023
Electrical Power quality in distribution systems is crucial to both utility and consumers simultaneously. The main issue that affects the quality factor of electrical distribution systems is phase load imbalance.
Abbas Khan, Muhammad Ali
doaj   +1 more source

Muscle: A Three Phase System [PDF]

open access: yesThe Journal of General Physiology, 1959
The partition of sulfate, Ca++, and Mg++ across the membrane of the sartorius muscle has been studied, and the effect of various concentrations of these ions in the Ringer solution on the cellular level of Na+, K+, and Cl- has been determined. The level of the three divalent ions in toad plasma and muscle in vivo has been assayed. Muscle
R. Frater, Shirley E. Simon, F. H. Shaw
openaire   +3 more sources

MULTICOMPONENT SYSTEMS WITH THREE-PHASE SPLITTING REGION

open access: yesТонкие химические технологии, 2016
A review of scientific publications that describe systems with a three-phase splitting region is presented. Mechanisms of a three-phase splitting region formation are shown.
A. V. Frolkova   +2 more
doaj   +1 more source

Reduced Reference Frame Transform: Deconstructing Three-Phase Four-Wire Systems

open access: yesIEEE Access, 2020
This paper proposes a new reference frame, namely Reduced Reference Frame (RRF), specially suited for unbalanced three–phase four–wire systems which improves the performance of the classical Fortescue, Clarke and Park transformations.
Francisco Casado-Machado   +4 more
doaj   +1 more source

Compensation of Budeanu’s Reactive and Complemented Reactive Currents in Extended Budeanu Theory in 3-Phase 4-Wire Systems Powered by Symmetrical Nonsinusoidal Voltage Source

open access: yesEnergies
The result of continuous efforts in the development of power theory, Budeanu’s power theory was successfully extended. The mathematical description that has been proposed is based on another concept, namely the Currents’ Physical Components (CPC) theory.
Zbigniew Sołjan   +3 more
doaj   +1 more source

Three-Phase Harmonic Analysis Method for Unbalanced Distribution Systems

open access: yesEnergies, 2014
Due to the unbalanced features of distribution systems, a three-phase harmonic analysis method is essential to accurately analyze the harmonic impact on distribution systems.
Jen-Hao Teng   +2 more
doaj   +1 more source

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