Results 11 to 20 of about 875 (164)
Grid Voltage Synchronization for Unbalanced Voltages Using the Energy Operator [PDF]
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017 This paper presents a novel synchronization technique which can identify the grid voltage frequency and phase angle under unbalanced grid voltage conditions. The method combines the features of two different energy operator schemes: the basic one for estimating the frequency of the grid voltages and the cross-energy operator for phase tracking. Using a
Nwobu, CJ, Nakiganda, AM, Zhang, L
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Advanced Vector Controller for a Four-Switch Three-Phase Rectifier under Unbalanced Grid Voltage
International Transactions on Electrical Energy Systems, 2022 One of the main challenges of a four-switch three-phase rectifier (FSTPR) is a DC imbalance in capacitor voltages. On the other hand, under unbalanced grid voltage conditions, unbalanced three-phase input current and the DC-link voltage affect the ...
M. Alizadeh Bidgoli, S. Honarbari
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IET Generation, Transmission & Distribution, 2021 This paper proposes an effective fault management scheme for medium‐voltage direct current (MVDC) networks, which includes a virtual‐impedance‐based fault current limiter (VI‐FCL) on the DC side and a positive‐negative‐sequence (PNS) control scheme on ...
Dongsen Sun +3 more
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Voltage Profile Improvement in Unbalanced Distribution Grids by Sequential Quadratic Programming
2023 IEEE AFRICON, 2023 The implementation of renewable energy resources (RERs) such as photovoltaic (PV) units and wind turbines (WTs) has been intensively used on active distribution networks (ADNs) due to their significant environmental, technical, and economic benefits.
Bamatraf, M +3 more
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Robust predictive current control of PWM rectifier under unbalanced and distorted network
IET Power Electronics, 2021 Model predictive current control has been proposed for the control of a pulse width modulation (PWM) rectifier due to its simple principle, and quick response.
Yongchang Zhang +3 more
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Energies, 2021 Leg capacitor energy balancing control is one of the crucial issues for stable operation of a cascaded H-bridge (CHB) converter. Because this topology inherently consists of numerous submodule cells with DC capacitors, the cell voltages and leg capacitor
Jae-Myeong Kim +2 more
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Control strategy for microgrid inverter under unbalanced grid voltage conditions [PDF]
2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE), 2014 This paper presents the theoretical analysis of the inherent reason of current harmonic and power oscillation phenomena in case of operating the microgrid inverter under unbalanced grid voltage conditions. In order to flexibly control the current harmonic and power oscillation, a new stationary frame control strategy is proposed.
Xiaoqiang Guo 0002 +4 more
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IEEE Access, 2019 Due to no dc-link energy storage element in the matrix converter (MC), its input and output performances are highly sensitive to the unbalanced grid conditions. In order to mitigate the adverse effects of the unbalanced grid voltages, this paper proposes
Wenjing Xiong +6 more
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IEEE Transactions on Smart Grid, 2022 Objectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats ...
Rolán Blanco, Alejandro +2 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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