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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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Fault tolerant control strategy for modular PWM current source inverter

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Frontiers in Energy 2023年第2期17卷 228-238页

作者： Weishuo SHI Jinwei HE School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China

In this paper,a fault-tolerant control method for an input-series output-parallel modular grid-tied pulse-width modulation(PWM)current source inverter is proposed to address the most commonly seen single symmetrical gate-commutated thyristor(SGCT)open-circuit fault *** method actively offsets the neutral point of the current space vector to ensure a sinusoidal output of the grid current,and it can achieve the upper limit power of the inverter under the condition of a single SGCT open-circuit *** addition,an active damping control method based on grid harmonic current feedback is proposed after analyzing the influence of the transformer ferromagnetic resonance caused by the neutral point offset on the power quality of the grid *** has been demonstrated that the proposed method effectively suppresses the resonance caused by the transformer and the modified modulation,improving the grid current’s power quality.

关键词： scurrent source converter(CSC) faulttolerant control space vector modulation active damping resonance suppression power quality

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