Results 1 to 10 of about 62,110 (225)
Model Predictive Current Control for Fault-Tolerant Bidirectional Voltage Source Converter With Open Circuit Fault and Unbalanced Grid Voltage [PDF]
IEEE Access, 2020 To improve the fault-tolerant operation capability of bidirectional voltage source converter (BVSC), an improved model predictive current control (IMPCC) for fault-tolerant BVSC, is proposed with balanced DC-link capacitor voltage under unbalanced grid ...
Shiyang Hu +3 more
doaj +2 more sources
Balance control of grid currents for UPQC under unbalanced loads based on matching-ratio compensation algorithm [PDF]
Journal of Modern Power Systems and Clean Energy, 2018 In three-phase four-wire systems, unbalanced loads can cause grid currents to be unbalanced, and this may cause the neutral point potential on the grid side to shift.
Xiaojun ZHAO +5 more
doaj +3 more sources
Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System [PDF]
AUT Journal of Electrical Engineering, 2022 Appropriate power quality is indispensable for electrical distribution networks, especially in microgrids including renewable energy sources. One of the critical issues affecting power quality is the unbalanced voltage.
Alireza Mohammadi +2 more
doaj +2 more sources
Voltage Support Provided by STATCOM in Unbalanced Power Systems [PDF]
Energies, 2014 The presence of an unbalanced voltage at the point of common coupling (PCC) results in the appearance of a negative sequence current component that deteriorates the control performance.
Ana Rodríguez +4 more
doaj +4 more sources
Effect of Doubly Fed Induction GeneratorTidal Current Turbines on Stability of a Distribution Grid under Unbalanced Voltage Conditions [PDF]
Energies, 2017 This paper analyses the effects of doubly fed induction generator (DFIG) tidal current turbines on a distribution grid under unbalanced voltage conditions of the grid.
Dahai Zhang +5 more
doaj +4 more sources
Induction Motor Under Unbalanced Voltage Subharmonics
IEEE AccessIn addition to fundamental harmonics, the voltage waveform may contain various undesirable components, including subharmonics (subsynchronous interharmonics) and interharmonics (SaIs), which are components with frequencies less than or not an integer ...
Piotr Gnacinski +3 more
doaj +2 more sources
Understanding the unbalanced-voltage problem in wind turbine generation
International Journal of Electronics, 2003 In this paper, three-phase unbalanced-voltage compensators using ac choppers are proposed. The proposed three-phase unbalanced-voltage compensators are made up of three single-phase ac choppers and transformers for unbalanced-voltage compensation and output voltage regulation.
Eduard Muljadi +3 more
openalex +4 more sources
Energy Reports, 2023 Doubly fed induction generator (DFIG) are vulnerable to unbalanced voltage and harmonic distortion, which will lead to the heating problem of stator/rotor windings and the damage of gearbox. This paper establishes the transient modeling of the DFIG under
Runtao Zhang +5 more
doaj +2 more sources
Energy Reports, 2023 The coupling between the positive and negative poles of the bipolar DC microgrid will influence the voltage control which makes it difficult to compute the parameters of the control loop independently.
Chunsheng Guo +6 more
doaj +1 more source
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