Experimental Verification of an Electrical Drive Fed by a Modular Multilevel TSBC Converter When the Motor Frequency Gets Closer or Equal to the Supply Frequency

Kawamura, Wataru; Chiba, Yuto; Hagiwara, Makoto; Akagi, Hirofumi

doi:10.1109/tia.2017.2665635

Cited by 33 publications

(35 citation statements)

References 19 publications

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“…7. As the maximum value of the circulating current Icir,MAX in (22) is set as 2A, compared with the results in [24] there is no obvious increase on branch current magnitude when the motor passing through critical-frequency points in Fig. 17 (e).…”

Section: Control Strategy Verification With Induction Motor Loadmentioning

confidence: 99%

“…Moreover, the reactive power applied at the supply-side is the same as the output-side, which seriously decrease the supply power quality especially when driving an induction motor. The ideas described in [24] use an adjustment in the motor magnetizing current to ensure that the input and output side share the same voltage magnitude at equal-frequency point. This method helps to achieve lower branch current stresses but in practice, the condition of same input and output voltage magnitude is difficult to hold.…”

Section: Introductionmentioning

confidence: 99%

“…This method helps to achieve lower branch current stresses but in practice, the condition of same input and output voltage magnitude is difficult to hold. Moreover, the method in [24] also needs to apply the same reactive power in [23] at the input side. To reduce the reactive power of the supply-side, [21] proposed a method by only using circulating currents to realize the equal-frequency operation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Optimal Full Frequency Control Strategy for the Modular Multilevel Matrix Converter Based on Predictive Control

Fan

Wang

Wheeler

et al. 2018

IEEE Trans. Power Electron.

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Fig. 1 (a), can be used to connect two three-phase electrical systems (input side and output side systems) using nine active branches. Each branch consists of a cascaded connection of full-bridge cells and a branch inductor. This topology was first proposed by R. Erickson and O. Al-Naseem in 2001 [2]. In common with other members of the modular multilevel cascade converter family [1], the M3C can easily reach high voltage ratings as well as significantly reduce voltage harmonics and electromagnetic interference. In addition, the modular structure makes it easier to accomplish construction, maintenance and thermal designs.Initially, the M3C topology was presented and researched without branch inductors. Space vector modulation (SVM) based capacitor-voltage balancing methods are proposed in

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Section: Control Strategy Verification With Induction Motor Loadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Optimal Full Frequency Control Strategy for the Modular Multilevel Matrix Converter Based on Predictive Control

Fan

Wang

Wheeler

et al. 2018

IEEE Trans. Power Electron.

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“…The capacitor voltage control for DC component is called a "DC capacitor voltage balancing control" [25,26], which regulates the DC components of all the capacitor voltages to be balanced. The capacitor voltage control for AC components is referred to as a "fluctuation mitigating control" [27,28], which mitigates the amplitude of AC voltage fluctuation. These controls are all realized by adjusting the four circulating currents appropriately.…”

Section: Capacitor Voltage Controlmentioning

confidence: 99%

Research on an Asymmetric Fault Control Strategy for an AC/AC System Based on a Modular Multilevel Matrix Converter

Zhang

Liang

2019

Energies

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This paper studies control strategies for an AC/AC system based on a modular multilevel matrix converter (M3C) when an asymmetric fault occurs in the secondary side ac system. Firstly, the operating principle of M3C is briefly introduced and verified by simulation. Then, based on its mathematical model by double αβ0 transformation, the decoupled control strategies for the primary side and secondary side systems are designed. In view of the asymmetric fault condition of the secondary side system, the positive sequence and negative sequence components of voltages and currents are separated and extracted, and then a proportional resonant controller (PR) is used to regulate the positive and negative sequence currents at the same time to realize decoupled current control in the αβ reference frames. The capacitor voltage balancing control, which consists of an inter-subconverter balancing control and an inner-subconverter balancing control, is realized by adjusting four circulating currents. Finally, the proposed control strategy is validated by simulation in the PSCAD/EMTDC software (Manitoba HVDC Research Center, Canada). The result shows that during the period of the BC-phase short-circuit fault occurring in the secondary side system, the whole system can still operate stably and transmit a certain amount of active power, according to their set values. Furthermore, the capacitor voltages are balanced, with a slight increase during the fault period. The simulation results verify the effectiveness of the proposed control strategy.

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“…Since a TSBC converter is suitable for high-power, low-speed, high-torque motor drives from a practical point of view, it will take the place of a traditional naturally commutated cycloconverter in the near future. The simple reason is that the TSBC converter would be free from shunt capacitors and shunt harmonic filters installed at the AC mains side [48][49][50][51][52][53].…”

Section: Motor Drive Applications a Few Manufacturersmentioning

confidence: 99%

A review of developments in the family of modular multilevel cascade converters

Akagi

2018

IEEJ Transactions Elec Engng

Self Cite

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This paper starts with a historical review of the family of modular multilevel cascade converters, and the topology and terminology of the family. Then, it answers the following question: 'What motivated the author to apply phase-shifted-carrier pulse-width modulation (PSC PWM) to the family?' The success in academic research on this application owes to integrating inter-cluster balancing or inter-arm balancing control into the middle layer of a hierarchical control system consisting of three layers. This integration makes it easy to expand the PSC PWM to any bridge-cell or chopper-cell count per cluster or arm. Finally, this paper ends with future scenarios of a few promising family members and their practical applications, from the personal experience and view of the author.

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Experimental Verification of an Electrical Drive Fed by a Modular Multilevel TSBC Converter When the Motor Frequency Gets Closer or Equal to the Supply Frequency

Cited by 33 publications

References 19 publications

An Optimal Full Frequency Control Strategy for the Modular Multilevel Matrix Converter Based on Predictive Control

An Optimal Full Frequency Control Strategy for the Modular Multilevel Matrix Converter Based on Predictive Control

Research on an Asymmetric Fault Control Strategy for an AC/AC System Based on a Modular Multilevel Matrix Converter

A review of developments in the family of modular multilevel cascade converters

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