Results 11 to 20 of about 1,424,911 (262)

Differential geometry-based harmonic analysis of three-phase systems [PDF]

Scientific Reports
This study presents an advanced framework for harmonic analysis in three-phase systems based on differential geometry principles. The proposed method employs the Frenet frame to geometrically represent voltage and current waveforms as spatial curves ...
Nitin Sundriyal, Padmanabh Thakur, Ashutosh Dixit, Sandeep Gupta, Mukesh Kumar   +4 more
doaj   +2 more sources

Budeanu’s Distortion Power Components Based on CPC Theory in Three-Phase Four-Wire Systems Supplied by Symmetrical Nonsinusoidal Voltage Waveforms

Energies
Budeanu’s power theory, in its fundamental version, describes single-phase sinusoidal and nonsinusoidal systems. Over time, this elementary description has been extended to three-phase three-wire and four-wire systems, regardless of power conditions ...
Zbigniew Sołjan, Tomasz Popławski
doaj   +3 more sources

Mathematical Models of the Phase Voltages of High-, Medium- and Low-Voltage Busbars in a Substation during a Phase-to-Ground Fault on High-Voltage Busbars

Mathematics, 2023
The electrical energy supply of industrial equipment is provided by electrical power stations with high- (HT), medium- (MV) and low-voltage (LV) busbars. Consumers are connected to either MV or LV busbars.
Dumitru Toader, Maria Vintan
doaj   +1 more source

Low-Latency, Three-Phase PMU Algorithms: Review and Performance Comparison

Applied Sciences, 2021
Phasor Measurement Units are the most advanced instruments for power network monitoring, since they allow phasors, frequency and rate of change of frequency (ROCOF) to be measured in predetermined time instants with respect to an absolute time reference.
Guglielmo Frigo, Paolo Attilio Pegoraro, Sergio Toscani   +2 more
doaj   +1 more source

Per-Phase Power Controller for Smooth Islanded Transitions in Three-Phase Three-Wire Systems

Energies, 2023
This manuscript describes the operation of a droop-based controller for three-phase converters in the case of the absence of a neutral connection to the grid.
Andrea Lauri, Tommaso Caldognetto, Davide Biadene, Hossein Abedini, Paolo Mattavelli   +4 more
doaj   +1 more source

Effects of air-lift reactor dimensions on its hydrodinamic characteristics [PDF]

Hemijska Industrija, 2010
In this study the hydrodynamic characteristics of the external loop airlift bioreactors were investigated. The influence of reactor height and solid particles concentration on the mean liquid circulation velocity was examined.
Milivojević Milan M., Andrejić Danijela S., Bugarski Branko M.   +2 more
doaj   +1 more source

Improving the energy efficiency of slightly inductive three‐phase three‐wire linear systems through single‐phase capacitors banks

IET Generation, Transmission & Distribution, 2022
Recent low‐voltage, three‐phase distribution networks carry inefficient power, which can be attributed to the reactive power, imbalance of linear loads, and increase in non‐linear loads.
Pedro A. Blasco, Rafael Montoya‐Mira, José M. Diez, Rafael Montoya, Gabriel Garcerá, Emilio Figueres   +5 more
doaj   +1 more source

A Driving Technique for AC-AC Direct Matrix Converters Based on Sigma-Delta Modulation

Energies, 2019
Direct conversion of AC power between three-phase systems operating at different frequencies can be achieved using solid-state circuits known as matrix converters.
Simone Orcioni, Giorgio Biagetti, Paolo Crippa, Laura Falaschetti   +3 more
doaj   +1 more source

Hybrid power quality conditioner for three-phase four-wire power systems [PDF]

E3S Web of Conferences, 2020
The article considers a hybrid power quality conditioner (HQPC) for 3-phase 4-wire systems with a distributed modular structure. Some conditioner modules provide compensation for the component currents and voltages that form the negative and zero ...
Chernyshov Maxim, Dovgun Valery, Temerbaev Sergei, Shakurova Zumeyra   +3 more
doaj   +1 more source

Partition of Proteins in a Three‐Phase System [PDF]

European Journal of Biochemistry, 1974
A system consisting of three liquid phases has been used for partition of proteins. It is composed of water and three high‐molecular compounds: dextran, Ficoll and poly(ethyleneglycol) the latter partly converted into a derivative. All the three phases have a high water content, 71–79%, and dissolve proteins.
A, Hartman, G, Johansson, P A, Albertsson   +2 more
openaire   +2 more sources