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Control of Grid Connected Converters Under Unbalanced Grid Faults
2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2018A grid connected inverter with an unbalanced voltage at the point of common coupling creates oscillation in DC link voltage at twice the grid frequency and inject highly distorted current into the grid. In this paper analytical expression for oscillation of DC link voltage and distortion in current injected to the grid are derived.
Souradeep Pal +5 more
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Study on grid feed forward strategy under Unbalanced Grid Condition
2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2019In the case of unbalanced power grid, the disturbance of the power grid is introduced into the feed forward accurately, thus, the output feed-forward part of the inverter is in perfect agreement with the unbalanced power grid, in order to achieve good and effective control of the current of the converter in the dynamic change of the power grid.
Zheng-ce Cai, Cheng Zhou, Fang Xie
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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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Grid Fault Analysis of Unbalanced Loaded DFIG
Advanced Materials Research, 2012The electrical energy consumption is rising and there is a steady increase in the demand of power generation. To meet the demand fuel reserves are not sufficient. So, we can go to non-conventional energy sources like solar, tidal, wind and etc. In that wind generating system is rapidly growing one.
R. Bhanu Raghava Prakash +2 more
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2019 IEEE Industry Applications Society Annual Meeting, 2019
In this paper, Modular Multilevel Converter (MMC) is considered for integrating the giga-watt PV farms with the power grid. In the considered MMC configuration, the PV panels are directly connected across the sub modules of MMC. This MMC-configuration suffers from power imbalance between the arms, phases or both due to non-uniform illumination of the ...
Rahul Mishra +2 more
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In this paper, Modular Multilevel Converter (MMC) is considered for integrating the giga-watt PV farms with the power grid. In the considered MMC configuration, the PV panels are directly connected across the sub modules of MMC. This MMC-configuration suffers from power imbalance between the arms, phases or both due to non-uniform illumination of the ...
Rahul Mishra +2 more
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Unbalanced Three-Phase Optimal Power Flow for Smart Grids
IEEE Transactions on Industrial Electronics, 2011Advanced distribution management system (DMS), an evolution of supervisory control and data acquisition obtained by extending its working principles from transmission to distribution, is the brain of a smart grid. Advanced DMS assesses smart functions in the distribution system and is also responsible for assessing control functions such as reactive ...
Bruno, Sergio +4 more
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Learning parameters and topology in unbalanced distribution grids
IET Conference Proceedings, 2022The methods proposed in this paper aim at learning the parameters and topology of a distribution grid by making use of available system measurements. The methods that are used rely on the formulation of the underlying physical equations as linear systems and use the resulting problem as a regression problem by applying the ordinary least squares method.
Jongh, S. de +5 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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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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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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