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Flexible Operation of Grid-Interactive Converters under Unbalanced Grid Conditions
Advanced Science and Technology Letters, 2015The grid codes of power systems with high penetration of renewable sources impose stringent requirements on the operation of Distributed Renewable Energy Sources (DRES) under the unbalanced grid faults. A generalized power control strategy based on the symmetrical components is used in this paper to control the power delivery under unbalanced grid ...
M. Ali Fotouhi +4 more
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Impact of unbalanced grid conditions on PV systems
IEEE PES General Meeting, 2010With more and more photovoltaic (PV) panels, energy storage devices and other small generators being put into service, it is necessary to integrate them into power systems. Grid integration provides a reliable means for customers to use renewable energy such as solar at its maximum and to use other sources as backup.
null Lingling Fan +2 more
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IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017
In this paper, an improved grid voltage modulated control (GVM) with power compensation is proposed for grid-connected voltage inverters when the grid voltage is unbalanced. The objective of the proposed control is to remove the power ripple and to improve current quality.
Li, Mingshen +3 more
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In this paper, an improved grid voltage modulated control (GVM) with power compensation is proposed for grid-connected voltage inverters when the grid voltage is unbalanced. The objective of the proposed control is to remove the power ripple and to improve current quality.
Li, Mingshen +3 more
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Control of Grid Connected MMC Under Balanced & Unbalanced Grid Conditions
2018 2nd International Conference on Trends in Electronics and Informatics (ICOEI), 2018With the advancement in power electronic systems the need for power electronic converters with increased reliability and efficiency of the conversion processes in medium and high power applications is ever growing. These requirements are ably fulfilled by the Modular Multilevel Converters (MMCs).
Mitali H Patel, Mukesh M Bhesaniya
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Circulating Current Suppression for MMC-HVDC under Unbalanced Grid Conditions
IEEE Transactions on Industry Applications, 2016Modular multilevel converter (MMC) is believed the most competitive solution for high-voltage direct current (HVDC) transmission using voltage source converters. Circulating current suppressing strategies based on proportional resonant (PR) controllers are widely used in MMC. This kind of strategies can effectively eliminate all the circulating current
null Jinyu Wang +3 more
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Small-Signal Stability of MMC Grid-Tied System Under Two Typical Unbalanced Grid Conditions
IEEE Transactions on Industry Applications, 2021The AC transmission network of Modular Multilevel Converters (MMC) usually adapts the overhead line, so the single-phase grounding faults of the AC side are rather general. At this time, the protection system will cut off the fault line for the first time, so there are two unbalance grid conditions (UGCs), i.e.
Jianhang Zhu +4 more
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Analysis of wind driven grid connected induction generators under unbalanced grid conditions
IEEE Transactions on Energy Conversion, 1994A wind driven induction generator feeding power to the grid has been analyzed under the abnormal condition of unbalanced grid voltages. Using the symmetrical component and double revolving field theory, appropriate equivalent circuits and model equations have been derived for the generating mode with suitable realistic modifications.
A.H. Ghorashi +3 more
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Voltage source converter control under unbalanced grid voltage conditions
2017 XXVI International Conference on Information, Communication and Automation Technologies (ICAT), 2017This paper proposes a novel control method for voltage source converter (VSC) connected to grid under unbalanced voltage conditions. The method is based on utilizing the full control capabilities of the switching converter. The proposed method makes the voltage source inverter (VSI) supply the voltages according to the requirements of the load and/or ...
Akhtar Rasool +2 more
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Performance of BDFIG During Balanced and Unbalanced Grid Conditions
2020 IEEE First International Conference on Smart Technologies for Power, Energy and Control (STPEC), 2020In this paper direct torque control (DTC) based brushless doubly fed induction generator (BDFIG) with space vector modulation (SVM) and a PI controller is proposed. Effective operation of DTC of BDFIG by improving steady state operation is proposed by minimizing flux and torque pulsations.
Upadhyayula J.A. Panini Sarma +1 more
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Small-Signal Model and Dynamics of MMC-HVDC Grid Under Unbalanced Grid Conditions
IEEE Transactions on Power Delivery, 2021Small-signal models (SSM) of modular multilevel converter (MMC) based HVDC grid under unbalanced grid conditions in recent literatures do not consider interactions between MMC and dc network. Therefore, it is necessary to correctly model the double-fundamental-frequency zero-sequence circulating currents (DFF-ZSCC) existing under unbalanced grid ...
Quanrui Hao +4 more
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