Dc-link voltage balancing of six-phase wind energy systems with series-connected machineside converters and NPC grid-side converter

Seng, Hang; Durán, Mario J.; Hew, W.P.; Rahim, N.A.; Levi, E.; Jones, M.

doi:10.1109/iecon.2012.6389330

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…The power converter connected to the dual stator machine in Fig. 2b can be controlled in the synchronous reference frame to balance the BiDC grid [13].…”

Section: Power Balancingmentioning

confidence: 99%

Bipolar DC grids on ships: possibilities and challenges

Yadav

Qin

Bauer

2022

Elektrotech. Inftech.

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“…The power converter connected to the dual stator machine in Fig. 2b can be controlled in the synchronous reference frame to balance the BiDC grid [13].…”

Section: Power Balancingmentioning

confidence: 99%

Bipolar DC grids on ships: possibilities and challenges

Yadav

Qin

Bauer

2022

Elektrotech. Inftech.

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show abstract

“…The latter case allows a two-wire connection between machine and grid sides, which can be advantageous in the case of off-shore wind farms [4], but requires an additional controller of the x-y currents to regulate the midpoint voltage [9]. If the dc-link midpoint is not isolated, the voltage balancing task can be performed from the grid-side, although the x-y controller in the machine side is still desirable to improve the system dynamics [32].…”

Section: Six-phase Energy Conversion Systems' Topologiesmentioning

confidence: 99%

Fault-Tolerant Operation of Six-Phase Energy Conversion Systems With Parallel Machine-Side Converters

González-Prieto

Durán

Seng

et al. 2016

IEEE Trans. Power Electron.

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Abstract The fault tolerance provided by multiphase machines is one of the most attractive features for industry applications where a high degree of reliability is required. Aiming to take advantage of such post-fault operating capability, some newly designed full-power energy conversion systems are selecting machines with more than three phases. Although the use of parallel converters is usual in high-power three-phase electrical drives, the fault tolerance of multiphase machines has been mainly considered with single supply from a multiphase converter. This work addresses the faulttolerant capability of six-phase energy conversion systems supplied with parallel converters, deriving the current references and control strategy that need to be utilized to maximize torque/power production. Experimental results show that it is possible to increase the post-fault rating of the system if some degree of imbalance in the current sharing between the two sets of three-phase windings is permitted.Index Terms Multiphase energy conversion systems, fault tolerance, parallel converters, field oriented control.

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“…1(b). In this configuration, the machine-side converters can provide additional control to the dc-link midpoint voltage balancing and improve the transient performance [16]. A similar concept, using twelve- phase permanent magnet machine and Vienna rectifiers, is presented in [14].…”

Section: Introductionmentioning

confidence: 99%

Operation of a Six-Phase Induction Machine Using Series-Connected Machine-Side Converters

Seng

Levi

Jones

et al. 2014

IEEE Trans. Ind. Electron.

144

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Abstract This paper discusses the operation of a multiphase system, aimed at both variable-speed drive and generating (e.g. wind energy) applications, using back-to-back converter structure with dual three-phase machine-side converters. In the studied topology, an asymmetrical six-phase induction machine is controlled using two three-phase two-level voltage source converters (VSCs) connected in series to form a cascaded dclink. The suggested configuration is analysed and a method for dc-link midpoint voltage balancing is developed. Voltage balancing is based on the use of additional degrees of freedom that exist in multiphase machines and represents an entirely new utilisation of these degrees. Validity of the topology and its control is verified by simulation and experimental results on a laboratory-scale prototype, thus proving that it is possible to achieve satisfactory dc-link voltage control under various operating scenarios.

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Dc-link voltage balancing of six-phase wind energy systems with series-connected machineside converters and NPC grid-side converter

Cited by 9 publications

References 14 publications

Bipolar DC grids on ships: possibilities and challenges

Bipolar DC grids on ships: possibilities and challenges

Fault-Tolerant Operation of Six-Phase Energy Conversion Systems With Parallel Machine-Side Converters

Operation of a Six-Phase Induction Machine Using Series-Connected Machine-Side Converters

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