Results 31 to 40 of about 1,208 (165)

Considerations on Current and Voltage Unbalance of Nonlinear Loads in Residential and Educational Sectors

Energies, 2020
Most often, electrical consumers in the residential and educational sectors are different from industrial electrical consumers. Whereas the vast majority of industrial electrical consumers are low-voltage, three-phase (with three or four wires ...
Gabriel Nicolae Popa, Angela Iagăr, Corina Maria Diniș   +2 more
doaj   +1 more source

Unbalance characteristics of fundamental and harmonic currents of three‐phase electric vehicle battery chargers

IET Generation, Transmission & Distribution, 2020
Three‐phase electric vehicle (EV) battery chargers are expected to not impact the unbalance of distribution networks; moreover, using active power factor correction topologies they are expected to behave like resistive loads not affecting the system ...
Jesus C. Hernández, Roberto Langella, Antonio Cano, Alfredo Testa   +3 more
doaj   +1 more source

Point Estimate Method for Voltage Unbalance Evaluation in Residential Distribution Networks with High Penetration of Small Wind Turbines

Energies, 2014
Voltage unbalance (VU) in residential distribution networks (RDNs) is mainly caused by load unbalance in three phases, resulting from network configuration and load-variations.
Chao Long, Mohamed Emad A. Farrag, Donald M. Hepburn, Chengke Zhou   +3 more
doaj   +1 more source

Fair Power Factor Billing Under Unbalanced and Nonsinusoidal Voltage Supply

IEEE Access, 2022
Utilities apply an additional fee for medium and large customers with low power factors. However, unfair financial charges may occur in installations subjected to voltage unbalance and harmonic distortion.
Victor P. Brasil, Jo Ao Y. Ishihara, Anesio De L. Ferreira Filho   +2 more
doaj   +1 more source

Optimal planning of uncertain renewable energy sources in unbalanced distribution systems by a multi‐objective hybrid PSO–SCO algorithm

IET Renewable Power Generation, 2022
High penetration of Renewable Energy Sources into unbalanced distribution systems faces many challenges due to the uncertainty nature of both Renewable Energy Sources and loads as well as the unbalance degree of the distribution systems.
Eman S. Ali, Ragab A. El‐Sehiemy, Adel A. Abou El‐Ela, Salah Kamel, Baseem Khan   +4 more
doaj   +1 more source

The Performance of a Three-Phase Induction Motor under and over Unbalance Voltage

Tikrit Journal of Engineering Sciences, 2022
Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. Three-phase source voltage may become imbalanced in a variety of respects, while a balanced system preserves stable voltage magnitude and angles in three ...
Abdulsatar H. Jassim, Arkan A. Hussein, Laith F. Abbas   +2 more
doaj  

Assessing the Static Security of the Italian Grid by Means of the N-1 Three-Phase Contingency Analysis

Energies
The ongoing replacement of synchronous machine generators (SMs) with converter-interface generators (CIGs) is raising the voltage unbalance of power systems, affecting power quality and grid stability.
Giovanni Gardan, Luca Rusalen, Roberto Benato   +2 more
doaj   +1 more source

Modeling and allocation of modern infrastructure deployment in LV European-type distribution systems for solving power quality issues

International Journal of Electrical Power & Energy Systems
Voltage magnitude limit violations (under/over-voltage), phase unbalance and occasional conductor overloads are among the most frequent and operationally critical problems in European low-voltage (LV) distribution networks, and their incidence is rising ...
Tarikua Taye, Bassam Mohamed, Xavier Domínguez, Mesfin Fanuel, Jesús Gutiérrez, Pablo Arboleya   +5 more
doaj   +1 more source

Development and Analysis of a Sensitivity Matrix of a Three-Phase Voltage Unbalance Factor [PDF]

IEEE Transactions on Power Systems, 2018
Unbalanced phase voltages in electricity networks prevent efficient and stable delivery of power and energy services from utility companies to end-users, and vice versa. While variations in voltage magnitude and power loss have been studied extensively, little attention has been paid to the development of linearized expressions to account for the ...
openaire   +2 more sources

Design of online monitoring system of coal mine voltage quality based on LabVIEW

Gong-kuang zidonghua, 2016
In view of increasingly serious problem of power supply quality of coal mine power grid, an online monitoring system of coal mine voltage quality was designed by use of signal processing circuit, data acquisition unit and technology of virtual instrument
LI Jinxi, CHEN Jiyong
doaj   +1 more source