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

Shi JIN, Long SHI, Sul ADEMI, Yue ZHANG, Fengge ZHANG

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Front. Energy ›› 2023, Vol. 17 ›› Issue (1) : 149-164. DOI: 10.1007/s11708-020-0711-2
RESEARCH ARTICLE

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

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Abstract

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 structure. Consequently, the two ends of the control winding are connected via dual three-phase converters for the emerging open-winding structure. Therefore, a novel fault-tolerant control strategy based on the direct power control scheme is brought to focus in this paper. Based 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 converters. The 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 control. The presented results verify the feasibility and validity of the scheme proposed.

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Keywords

open-winding / brushless doubly-fed reluctance generator (BDFRG) / direct power control / fault-tolerant control / multi-level converter / wind power

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Shi JIN, Long SHI, Sul ADEMI, Yue ZHANG, Fengge ZHANG. Fault-tolerant control of an open-winding brushless doubly-fed wind power generator system with dual three-level converter. Front. Energy, 2023, 17(1): 149‒164 https://doi.org/10.1007/s11708-020-0711-2

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 51537007).

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2020 Higher Education Press
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