Results 31 to 40 of about 33,716,273 (299)

Real-Time Three-Phase Dynamic Full ACPF Distribution System Model

open access: yesYanbu Journal of Engineering and Science, 2022
Power flow is the backbone for power system operation and control. Power system balancing, where supply of energy has to equal demand all time, is a very important operation constraint for electric power systems.
Sultan Hakmi Jr.
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

Improving Inverter Output Current Controller Under Unbalanced Conditions by Using Virtual Impedance

open access: yesIEEE Access, 2021
Nowadays, three-phase inverters have been commonly used in power systems, especially in renewable energy and motor drives applications. In many applications, the inverter has to generate balanced sinusoidal three-phase currents even though it is ...
Lukas Antonio Budiwicaksana   +4 more
doaj   +1 more source

Adaptive nonlinear control of single-phase to three-phase UPS system

open access: yesMATEC Web of Conferences, 2014
This work deals with the problems of uninterruptible power supplies (UPS) based on the single-phase to three-phase converters built in two stages: an input bridge rectifier and an output three phase inverter.
Kissaoui M.   +4 more
doaj   +1 more source

Geometric Phase of Three-Level Systems in Interferometry [PDF]

open access: yesPhysical Review Letters, 2001
We present the first scheme for producing and measuring an Abelian geometric phase shift in a three-level system where states are invariant under a non-Abelian group. In contrast to existing experiments and proposals for experiments, based on U(1)-invariant states, our scheme geodesically evolves U(2)-invariant states in a four-dimensional SU(3)/U(2 ...
Sanders, Barry C.   +3 more
openaire   +3 more sources

The International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three: A global synthesis [PDF]

open access: yes, 2013
This ISAAC Phase Three synthesis provides summarised information on the main findings of the study, regional tables and figures related to the prevalence and severity of current symptoms of asthma, rhinoconjunctivitis and eczema in the main regions of ...
Keil, U   +7 more
core   +1 more source

Power Management in Three-Phase Grid-Integrated PV System with Hybrid Energy Storage System

open access: yesEnergies, 2023
The management of energy in distribution networks has been gathering attention in recent years. The simultaneous control of generation and demand is crucial for achieving energy savings and can further lower energy pricing.
Chinmaya Jagdev Jena, Pravat Kumar Ray
doaj   +1 more source

Fast and robust three-dimensional best path phase unwrapping algorithm [PDF]

open access: yes, 2007
What we believe to be a novel three-dimensional (3D) phase unwrapping algorithm is proposed to unwrap 3D wrapped-phase volumes. It depends on a quality map to unwrap the most reliable voxels first and the least reliable voxels last.
Moore, Christopher J.   +5 more
core   +1 more source

Mathematical Modelling of Transient Processes in a Three Phase Electric Power System for a Single Phase Short-Circuit

open access: yesEnergies, 2022
Field approaches are employed to develop a mathematical model of a power network section. The facility consists of two electric power subsystems described with ordinary differential equations and presented as concentrated parameter systems connected with
Andriy Chaban   +3 more
doaj   +1 more source

Single-to-three phase induction motor sensorless drive system

open access: yesAlexandria Engineering Journal, 2012
This paper presented a single to three-phase induction motor drive system to provide variable output voltage and frequency. The proposed drive system employs only six IGBT switches, which form the front-end rectifier and the output inverter for the one ...
Z.M.S. El-Barbary
doaj   +1 more source

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