Results 11 to 20 of about 93,852 (297)
Improved control of virtual synchronous generator under unbalance of grid voltage
Energy Reports, 2023 Asymmetric faults in the power grid will lead to unbalanced grid voltage. When the traditional VSG control operates under unbalanced grid voltage, the output current will be unbalanced, resulting in output power oscillation.
Chunxue Wen +3 more
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Energies, 2022 Discussed in this study is a bidirectional power control technique for a three-phase grid connected inverter under different unbalanced grid conditions.
Mohammad Alathamneh +2 more
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State Estimation in Unbalanced Smart Grids
2022 International Conference on Smart Energy Systems and Technologies (SEST), 2022 <p>This study presents a Distribution System State Estimation (DSSE) algorithm for unbalanced smart grids and evaluates its performance with special focus on the effect of the unavailability of measurements, which is a common problem on smart grids. The proposed DSSE algorithm is based on the Weighted Least Squares (WLS) method and the unbalanced
Dimitrios Tzovaras +7 more
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Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System
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. Voltage imbalance in microgrids spreads due to proximity of loads and power sources, causing instability, and eventually interruption.
Mohammadi, Alireza +2 more
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Deadbeat predictive power control for Vienna rectifier under unbalanced power grid condition
Energy Reports, 2021 Due to the low output distortion and switch voltage stress, Vienna rectifiers have been widely utilized in high-power applications such as communication power supplies, wind power systems and electric vehicle charging piles.
Yiyan Lu +4 more
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Control of Grid-Following Inverters Under Unbalanced Grid Conditions
IEEE Transactions on Energy Conversion, 2020 This paper proposes a new control scheme to eliminate the 3rd harmonic in the output currents of grid-following inverters under unbalanced grid conditions. Unbalanced grids adversely affect the performance of grid-following inverters due to the oscillations appearing on the DC-link voltage with a frequency twice the line frequency.
Seyed Fariborz Zarei +5 more
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Flexible operation of parallel grid-connecting converters under unbalanced grid voltage [PDF]
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017 According to the European grid code, grid-connecting converters should always be connected to the grid under grid voltage unbalance. However, grid voltage unbalance severely affects the stable operation of the converters and leads to the various power issues, such as active power oscillation, DC-link voltage ripple, and overloading.
Lu, Jinghang +2 more
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A New Model Predictive Current Controller for Grid-Connected Converters in Unbalanced Grids [PDF]
IEEE Transactions on Power Electronics, 2022 Distributed energy resources are often connected to low-voltage distribution networks where the grid voltages may be unbalanced. This leads to an unwanted ripple in the output active power at twice the fundamental grid frequency. In this article, a new model predictive current controller is proposed for unbalanced grids.
Euan T. Andrew +2 more
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Online Parametric Estimation of Grid Impedance Under Unbalanced Grid Conditions [PDF]
Energies, 2019 Whereas power-electronics-based power systems are expected to enable more integration of renewable energy sources, they could pose crucial challenges including stability issues due to the Thévenin impedance seen by inverters. Such problems could be mitigated by enabling the inverters to estimate the grid impedance by including a grid impedance ...
Nabil Mohammed +2 more
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Power and Current Limiting Control of Wind Turbines Based on PMSG Under Unbalanced Grid Voltage
IEEE Access, 2021 Unbalanced grid voltage sags are the severe challenge for wind power generation system which connected to the grid successfully. The dc bus voltage and output power will fluctuate under unbalanced grid voltage. Moreover, the voltage sags will lead to the
Jun Liu, Chencong Zhao, Zhouhua Xie
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