Dual Two-Level Converters Based on Direct Power Control for an Open-Winding Brushless Doubly-Fed Reluctance Generator


This paper proposes a novel open-winding brushless doubly-fed reluctance generator (OW-BDFRG) with dual two-level converters in order to reduce the converter rating and switching frequency for large-scale wind turbine applications. The new converter topology is equivalent to a three-level converter directly connected to the control winding of typical BDFRG. The OW-BDFRG system with this topology structure requires lower converter rating and switching frequency, and has a more flexible control mode, better operation performance, and fault redundancy capability. For the OW-BDFRG, this paper also proposes a new control scheme combining direct power control (DPC) with sliding mode variable structure (SMVS) control to implement the power tracking. The voltage-vector switching table of DPC is redesigned according to the error signals of active and reactive powers of the power winding, as well as the sector location of control winding flux. The active and reactive powers of the OW-BDFRG can be directly decoupled and independently controlled by properly selecting the switching voltage vectors. The novelty of this paper lies in an OW-BDFRG topology driven by dual two-level converters to improve the system characteristics, and the use of SMVS control to improve the DPC accuracy and robustness to parameter variations. Finally, the effectiveness of the proposed system is verified through simulation and experimental studies.

Publication DOI: https://doi.org/10.1109/TIA.2017.2693959
Divisions: College of Engineering & Physical Sciences
Additional Information: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Funding: 10.13039/501100001809-National Natural Science Foundation of China; 10.13039/501100005047-Natural Science Foundation of Liaoning Province, China
Uncontrolled Keywords: Brushless doubly-fed generator (BDFG),direct power control (DPC),dual two-level converter,open-winding structure,reluctance rotor,sliding mode variable structure (SMVS),Control and Systems Engineering,Industrial and Manufacturing Engineering,Electrical and Electronic Engineering
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-04-12
Accepted Date: 2017-04-02
Authors: Jin, Shi
Shi, Long
Zhu, Liancheng
Cao, Wenping (ORCID Profile 0000-0002-8133-3020)
Dong, Ting
Zhang, Fengge



Version: Accepted Version

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