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Fault-tolerant control of an open-winding brushless doublyfed wind power generator system with dual three-level converter

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Frontiers in Energy 2023年第1期17卷 149-164页

作者： Shi JIN Long SHI Sul ADEMI Yue ZHANG Fengge ZHANG School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China Warwick Manufacturing Group University of WarwickCoventry CV47ALWarwickUK School of Electrical Engineering Shandong UniversityJinan 250061China

To improve the fault redundancy capability for the high reliability requirement of a brushless doubly-fed generation system applied to large offshore wind farms,the control winding of a brushless doubly-fed reluctance generator is designed as an open-winding ***,the two ends of the control winding are connected via dual three-phase converters for the emerging open-winding ***,a novel fault-tolerant control strategy based on the direct power control scheme is brought to focus in this *** on the direct power control(DPC)strategy,the post-fault voltage vector selection method is explained in detail according to the fault types of the dual *** fault-tolerant control strategy proposed enables the open-winding brushless doubly-fed reluctance generator(BDFRG)system to operate normally in one,two,or three switches fault of the converter,simultaneously achieving power tracking *** presented results verify the feasibility and validity of the scheme proposed.

关键词： open-winding brushless doubly-fed reluctance generator(BDFRG) direct power control faulttolerant control multi-level converter wind power

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multilevel Current Source converters for High Power Medium Voltage Applications

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CES Transactions on Electrical Machines and Systems 2017年第3期1卷 306-314页

作者： Li Ding Yujuan Lian Yun Wei Li Department of Electrical and Computer Engineering University of AlbertaEdmontonABCanada 不详

In medium voltage high power applications,multi-level current source converters(CSCs)are good candidate to increase system power region,reliability,and the quality of output *** with widely researched voltage source multi-level converters(MLCs),the current source MLCs have the advantages of inherent short-circuit protection,high power capability and high quality of output current *** main features of MLCs include reduced harmonics,lower switching frequency and reduced current stress on each device which is a particularly important for high power application with low voltage and high current *** paper conducts a general review of the current research about MLCs in higher power medium voltage *** different types of parallel structure based MLCs and the modulation methodologies will be introduced and ***,the circuit analysis of the common-mode(CM)loop for parallel structures will be conducted,the common-mode voltage(CMV)and circulating current suppression methods developed on the base of multilevel modulations will be addressed.

关键词： Circulating current common-mode voltage current source converters multi-level converter high power medium voltage parallel structure

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