Results 1 to 10 of about 23,931 (308)

New Smart Sensor for Voltage Unbalance Measurements in Electrical Power Systems [PDF]

Sensors, 2022
This paper deals with voltage unbalances and how they can be quantified according to the standards. Firstly, a comparison between the different unbalance voltage factors is conducted in order to remark on their divergences.
Santiago Bogarra, Jaime Saura, Alejandro Rolán   +2 more
doaj   +2 more sources

Induction Motors Under Voltage Unbalance Combined with Voltage Subharmonics

Energies
In power systems, various power quality disturbances are present, including voltage deviation, voltage unbalance, and voltage waveform distortions. Voltage waveform distortions are usually identified with harmonics, but in some systems, subharmonics ...
Piotr Gnaciński, Marcin Pepliński, Adam Muc, Damian Hallmann   +3 more
doaj   +2 more sources

Three-Phase Primary Control for Unbalance Sharing between Distributed Generation Units in a Microgrid [PDF]

Energies, 2013
For islanded microgrids, droop-based control concepts have been developed both in single and three-phase variants. The three-phase controllers often assume a balanced network; hence, unbalance sharing and/or mitigation remains a challenging issue ...
Tine L. Vandoorn, Jeroen D. M. De Kooning, Jan Van de Vyver, Lieven Vandevelde   +3 more
doaj   +4 more sources

Improvement of Voltage Unbalance by Current Injection Based on Unbalanced Line Impedance in Distribution Network with PV System

Energies, 2021
In this study, we have proposed a novel current injection determination method that improves the voltage unbalance based on the unbalanced line impedance in a distribution network with a large-capacity PV system.
Daisuke Iioka, Takahiro Fujii, Toshio Tanaka, Tsuyoshi Harimoto, Junpei Motoyama, Daisuke Nagae   +5 more
doaj   +1 more source

Comprehensive Modeling of Induction Motor Imbalance Condition to ‎Precise Assessment of Steady State Performance Based on Complex ‎Current Unbalance Factor [PDF]

مجله مدل سازی در مهندسی, 2021
After a comprehensive study of voltage unbalance issue, this ‎paper presents the defects of some unbalance factors and ‎concentrates on the importance of considering the angle of ‎complex voltage unbalance factor (CVUF) in order to ‎unbalanced condition ...
Saeed Maghsoodi, Yusef Kazemi-Sanji, Mohammad Farhadi-Kangarlu, Sadjad Galvani   +3 more
doaj   +1 more source

Dependancy of Three Phase Induction Motor Derating Aspects on Complex Voltage Unbalance Factor: A Calorimetric and Finite Element Simulation Study

IEEE Access, 2021
It is well known that three-phase induction motors have to be derated in the presence of supply voltage unbalance (negative sequence) exceeding a stipulated limit of 1% based on several widely used standards.
Pathum Sudasinghe, Upuli Jayatunga, Philip Commins, Jeff Moscrop, Sarath Perera   +4 more
doaj   +1 more source

Comprehensive review and a novel technique on voltage unbalance compensation

IET Smart Grid, 2023
Voltage unbalance has gained more attention due to a rapid increase in single‐phase distributed energy resources (DERs) penetration compound with existing unbalance characteristics of low voltage distribution network.
Nattanapong Kongtrakul, Wijarn Wangdee, Soamsiri Chantaraskul   +2 more
doaj   +1 more source

An Alternative Methodology for Quantifying Voltage Unbalance Based on the Effects of the Temperatures and Efficiency of Induction Motors

IEEE Access, 2022
Many unbalanced voltage conditions, which produce different effects on electric equipment, are associated with the same voltage unbalance factor. This fact hinders the precise association between the values of this index and the effects of voltage ...
Marcos D. C. Silva, Anesio de L. Ferreira Filho   +1 more
doaj   +1 more source

Unbalanced Voltage Compensation with Optimal Voltage Controlled Regulators and Load Ratio Control Transformer

Energies, 2021
Penetration of equipment such as photovoltaic power generations (PV), heat pump water heaters (HP), and electric vehicles (EV) introduces voltage unbalance issues in distribution systems.
Akito Nakadomari, Ryuto Shigenobu, Takeyoshi Kato, Narayanan Krishnan, Ashraf Mohamed Hemeida, Hiroshi Takahashi, Tomonobu Senjyu   +6 more
doaj   +1 more source

Convex Model for Estimation of Single-Phase Photovoltaic Impact on Existing Voltage Unbalance in Distribution Networks

Applied Sciences, 2020
Due to the increasing adoption of solar power generation, voltage unbalance estimation gets more attention in sparsely populated rural networks. This paper presents a Monte Carlo simulation augmented with convex mixed-integer quadratic programming to ...
Verner Püvi, Matti Lehtonen
doaj   +1 more source