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

Shi, Long; Zhu, Liancheng; Cao, Wenping; Dong, Ting; Zhang, Fengge

doi:10.1109/tia.2017.2693959

Cited by 16 publications

(7 citation statements)

References 18 publications

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“…For the vector 15 , the CMV is 0 as expressed in (11), hence other vectors with CMV = 0 can be obtained as OH, OJ, OL, ON, OQ, OS and O, thus the effective vectors are only the middle ones. To implement the proposed direct power control strategy, the voltage space vectors with CMV elimination are shown in Fig.…”

Section: B Combinations and Optimization Methods Of The Voltage Spacmentioning

confidence: 99%

“…Note that if ω rm > ω syn , (3) gets '-' for super-synchronous and ω c > 0, the phase sequence of control winding is the same as the power winding; if ω rm < ω syn , (3) takes '+' for sub-synchronous, and ω c < 0, where the phase sequence is opposite in the stator windings. Using 4, the mechanical power balance shows individual contributions of each winding considering angular velocity and pole arrangements can be represented as [11]:…”

Section: B Principle Operation Of Ow-bdfrg With Vscf-mpptmentioning

confidence: 99%

“…Giving recognition to the BDFGs relatively higher leakage inductances and thus lower transient fault current in low-voltage ride-through without the need of supplementary crowbar circuitry makes BDFGs seemingly superior to the DFIG for grid-connected power generation [9]. Comparing the drawbacks of reliability and maintenance of DFIG for longterm use in medium or large-scale applications, the brushes and slip-rings have been removed in BDFGs design by moving the DFIG controllable rotor winding to the stator as the control winding to obtain higher robustness and maintenance-free operation [10], [11]. Except for the above features, due to the absence of rotor winding, open-winding brushless doublyfed reluctance generator (OW-BDFRG) has further merits in 0278-0046 (c) 2018 IEEE.…”

mentioning

confidence: 99%

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Controller Strategy for Open-Winding Brushless Doubly Fed Wind Power Generator With Common Mode Voltage Elimination

Zhang

Zhu

et al. 2019

IEEE Trans. Ind. Electron.

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This paper presents the theoretical derivation and implementation of a novel direct power control for open-winding brushless doubly-fed reluctance generator (OW-BDFRG). As one of the promising brushless candidates, the OW-BDFRG is characterized with two stator windings fed by a dual controllable two-level three-phase converters through a common DC bus with common mode voltage elimination. The parameter-free control strategy is designed to obtain maximum power point tracking with variable speed constant frequency (VSCF) for wind energy conversion systems (WECSs). Compared to the traditional three-level converter systems, the DC bus voltage, ACside voltage and capacity ratings of the proposed converter system are notably high while the reliability, redundancy and fault tolerance are significantly improved. Effectiveness, correctness and robustness of the proposed control strategy and the common mode voltage elimination scheme are evaluated and confirmed through simulation and experimental tests on a 42 kW generator prototype typical for VSCF-WECS. Index Terms-Brushless doubly-fed machines, power control, common mode voltage, open-winding, variable speed constant frequency, maximum power point tracking. NOMENCLATURE u p , u c Power, control winding phase voltages [V] i p , i c Power, control winding phase currents [A] R p , R c Power, control winding resistances [Ω] p p , p c , p r Power, control and rotor pole pairs L p , L c Power, control winding self-inductan. [H] ψ p , ψ c Power, control winding flux linkages [Wb] ψ pc , L pc Mutual flux [Wb] and inductance [H] f p , f c , ω p , ω c Power, control winding frequencies [Hz] and their angular frequencies [rad/s]

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Section: B Combinations and Optimization Methods Of The Voltage Spacmentioning

confidence: 99%

Section: B Principle Operation Of Ow-bdfrg With Vscf-mpptmentioning

confidence: 99%

mentioning

confidence: 99%

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Controller Strategy for Open-Winding Brushless Doubly Fed Wind Power Generator With Common Mode Voltage Elimination

Zhang

Zhu

et al. 2019

IEEE Trans. Ind. Electron.

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“…In comparison with the tri-level converter systems, the capacity ratings of the designed converter system, the DC-link voltage, and also AC-side voltage are considerably high while notable improvements in fault tolerance, redundancy, and reliability are observed. A DPC approach is used for an open-winding BDFRG with dual bi-level converters in [118] with the aim of decreasing the converter capacity, as well as reducing the switching frequency, for wind turbines on larger scales. The proposed converter system is equivalent to a tri-level converter, which is directly connected to the secondary winding of the stator, i.e., control winding.…”

Section: Direct Power Control-based Strategiesmentioning

confidence: 99%

A Comprehensive Review on Brushless Doubly-Fed Reluctance Machine

et al. 2021

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The Brushless Doubly-Fed Reluctance Machine (BDFRM) has been widely investigated in numerous research studies since it is brushless and cageless and there is no winding on the rotor of this emerging machine. This feature leads to several advantages for this machine in comparison with its induction counterpart, i.e., Brushless Doubly-Fed Induction Machine (BDFIM). Less maintenance, less power losses, and also more reliability are the major advantages of BDFRM compared to BDFIM. The design complexity of its reluctance rotor, as well as flux patterns for indirect connection between the two windings mounted on the stator including power winding and control winding, have restricted the development of this machine technology. In the literature, there is not a comprehensive review of the research studies related to BDFRM. In this paper, the previous research studies are reviewed from different points of view, such as operation, design, control, transient model, dynamic model, power factor, Maximum Power Point Tracking (MPPT), and losses. It is revealed that the BDFRM is still evolving since the theoretical results have shown that this machine operates efficiently if it is well-designed.

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“… Topological analysis of airgap field modulation phenomenon in BDFMs [26], [60], [61];  Emergence of new or improved machine topologies for higher torque density and/or efficiency [49], [50], [62][63][64];  Modeling and performance analysis taking into account the influence of harmonics, saturation and iron loss [65][66][67][68];  Design optimization considering the multi-port and multi-harmonic feature [58], [69][70][71];  Dynamic modeling and fundamental control, mainly for the cascading type and BDFIM due to their complex construction [72][73][74][75][76][77][78][79][80];  Control strategies and performance evaluation in stand-alone [81][82][83] and grid-connected wind power scenarios, especially on low-voltage ride-through (LVRT) [84][85][86], unbalanced or grid-fault conditions [57], [87], [88], etc.…”

Section: Bdfmmentioning

confidence: 99%

Emerging Multiport Electrical Machines and Systems: Past Developments, Current Challenges, and Future Prospects

Cheng

Han

Buja

et al. 2018

IEEE Trans. Ind. Electron.

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Distinct from the conventional machines with only one electrical and one mechanical port, electrical machines featuring multiple electrical/mechanical ports (the so-called multi-port electrical machines) provide a compact, flexible, and highly-efficient manner to convert and/or transfer energies among different ports. This paper attempts to make a comprehensive overview of existing multi-port topologies, from fundamental characteristics to advanced modeling, analysis, and control, with particular emphasis on the extensively investigated brushless doubly-fed machines for highly-reliable wind turbines and power split devices for hybrid electric vehicles. A qualitative review approach is mainly adopted but strong efforts are also made to quantitatively highlight the electromagnetic and control performance. Research challenges are identified and future trends are discussed.

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

Cited by 16 publications

References 18 publications

Controller Strategy for Open-Winding Brushless Doubly Fed Wind Power Generator With Common Mode Voltage Elimination

Controller Strategy for Open-Winding Brushless Doubly Fed Wind Power Generator With Common Mode Voltage Elimination

A Comprehensive Review on Brushless Doubly-Fed Reluctance Machine

Emerging Multiport Electrical Machines and Systems: Past Developments, Current Challenges, and Future Prospects

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