Results 1 to 10 of about 24,035 (201)
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 +2 more
doaj +2 more sources
Examination of the definitions of voltage unbalance
International Journal of Electrical Power and Energy Systems, 2013 Abstract In this paper, various definitions of voltage unbalance are explored and compared, and their proper application conditions are examined as well. A popular optimal algorithm, the genetic algorithm, is adopted to investigate the differences among various definitions of voltage unbalance.
Tsai-Hsiang Chen +2 more
exaly +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 +3 more
doaj +4 more sources
Induction Motors Under Voltage Unbalance Combined with Voltage Subharmonics
EnergiesIn 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 +3 more
doaj +2 more sources
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 +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 +3 more
doaj +1 more source
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 +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 +2 more
doaj +1 more source
On the Optimality of Voltage Unbalance Attenuation by Inverters
IEEE Transactions on Sustainable Energy, 2022 In this paper, we investigate the control of inverter-based resources (IBRs) for optimal voltage unbalance attenuation (OVUA). This problem is formulated as an optimization program under a tailored dq-frame, which minimizes the negative-sequence voltage at the point of common coupling (PCC) subject to the current, active power, synchronization ...
Yifei Guo, Bikash C. Pal, Rabih A. Jabr
openaire +3 more sources
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 +1 more
doaj +1 more source