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Robust Backstepping Control of Synchronverters under Unbalanced Grid Condition
2019 IEEE Power and Energy Conference at Illinois (PECI), 2019Virtual Synchronous Generators, known as synchronverters, are inherently nonlinear systems and maintaining their consistent operation under faulty and distorted grid requires a nonlinear control design. This paper presents backstepping as an adaptive stabilizing technique which enables full power injection to the grid under unbalanced and weak ...
Sara Yazdani, Mehdi Ferdowsi
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Doubly-fed induction generator control during unbalanced grid conditions
2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), 2015In the last few years, the number of grid connected wind conversion systems (WECS) has increased rapidly. One of the most commercialized WECS technologies is the doubly-fed induction generator (DFIG) that offers operational and economical advantages over other ones.
Victor F. Mendes +4 more
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Control Strategy of Cascade STATCOM Under Unbalanced Grid Conditions
IETE Technical Review, 2014ABSTRACTPower network imbalance has become an increasingly serious problem, particularly in coal mines. This study presents an improved control strategy of cascade STATCOM under unbalanced grid conditions. This study investigates the balance and control of all DC capacitor voltages, from global balancing control, clustered balancing control and ...
Xia Zhenglong, Shi Liping, Yang Xiaodong
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An OCC-APF control strategy for unbalanced grid conditions
2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015In this work it is proposed a DSP based, OCC control strategy for APF, which is able to work in case of unbalanced grid voltage, i.e. when it is affected by a common mode voltage. Proposed strategy is based on an OCC rectifier control which utilizes an input resistance control to set up dc-link voltage and achieve a unity power factor as well, and a ...
Alberto S. Lock +3 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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Energy Balancing Improvement of Modular Multilevel Converters Under Unbalanced Grid Conditions
IEEE Transactions on Power Electronics, 2017This paper presents a feedback/feed-forward control strategy to improve the voltage balancing of modular multilevel converters (MMCs) under unbalanced grid conditions. The inclusion of a feed-forward compensation improves the disturbance rejection capability against asymmetrical faults and sudden voltage imbalances in the ac grid.
Leon, Enrique Andres +1 more
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An improved voltage support strategy of grid-connected inverter under unbalanced grid condition
2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific), 2017In order to ensure three-phase grid-connected inverter output voltage symmetry under unbalanced grid voltage, an improved control strategy is proposed in this paper. The proposed control strategy includes power, voltage and current three loops. The complex coefficient-filter (CCF) is used to obtain the positive and negative sequence of unbalance output
Wang Wei, Li Pengfei, Li Fen, Liu Guihua
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Modeling and control of a grid-connected BDFM under unbalanced grid voltage conditions
2011 IEEE International Electric Machines & Drives Conference (IEMDC), 2011info:eu-repo/semantics ...
Sotoodeh, Pedram +3 more
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Inner Current Controls of Grid-Connected PV for Unbalanced Grid Conditions
2021 North American Power Symposium (NAPS), 2021Abdulhakim Alsaif +2 more
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Advanced Control of Grid-Connected Current Source Converter Under Unbalanced Grid Voltage Conditions
IEEE Transactions on Industrial Electronics, 2018There are technical challenges when the grid-connected current source converter operates under unbalanced grid voltage conditions. The negative sequence component of the unbalanced grid voltage would result in the low-frequency ripple at dc side, as well as current harmonics at ac side. It has an adverse impact on the system operation.
Xiaoqiang Guo, Yong Yang, Xue Zhang
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