A Model-Based Control Scheme for Modular Multilevel Converters

Barnklau, Hans; Gensior, Albrecht; Rudolph, Joachim

doi:10.1109/tie.2012.2236997

Cited by 58 publications

(22 citation statements)

References 12 publications

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“…The energyw can be calculated from (10). Multiplying (10) by i a1 = i 0 + 2i 2 + 2i 4 yields the change in capacitive energẏ…”

Section: Examplementioning

confidence: 99%

“…This applies for many (closed-loop) control schemes, e.g., if the currents of the converter are controlled, or control schemes similar to [9] and [10] are used. It does not apply for (open-loop) sinusoidal pulsewidth modulation methods (called "direct modulation" in [9] and [11]), since currents i 0 , i 1 , and i 2 depend on C, L a (see [11] for instance).…”

Section: Examplementioning

confidence: 99%

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Submodule Capacitor Dimensioning for Modular Multilevel Converters

Barnklau

Gensior

Bernet

2014

IEEE Trans. on Ind. Applicat.

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“…The energyw can be calculated from (10). Multiplying (10) by i a1 = i 0 + 2i 2 + 2i 4 yields the change in capacitive energẏ…”

Section: Examplementioning

confidence: 99%

Section: Examplementioning

confidence: 99%

Submodule Capacitor Dimensioning for Modular Multilevel Converters

Barnklau

Gensior

Bernet

2014

IEEE Trans. on Ind. Applicat.

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“…The flexible operation of the MMC by switching the submodules (SMs) can generate a multilevel voltage configuration and reduce the device's average switching frequency without compromising the power quality [3][4][5][6]. Due to easy construction, assembling, and flexibility in converter design, the MMC becomes attractive for high-voltage direct current (HVDC) transmission [7][8][9][10][11][12], high power motor drives [13], [14], and electric railway supplies [15].…”

Section: Introductionmentioning

confidence: 99%

Voltage-Balancing Method for Modular Multilevel Converters Switched at Grid Frequency

Deng

Chen

2015

IEEE Trans. Ind. Electron.

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The modular multilevel converter (MMC) becomes attractive for high-voltage and high-power applications due to its high modularity, availability, and power quality. The voltage balance issue of capacitors is very important in the MMC, and the balancing of the capacitor voltage is increasingly difficult as the switching frequency is reduced. In this paper, a voltage-balancing method is proposed for the MMC switched at grid frequency with reduced losses and does not rely on the arm current. By assigning the low-frequency pulses with different pulse widths, the capacitor charge transfer in the MMC can be controlled for keeping the capacitor voltage balancing in the MMC. Simulations and experimental studies of the MMC are conducted, and the results confirm the effectiveness of the proposed capacitor voltage-balancing method. . His main research interests include wind power generation, multilevel converters, DC grid, high-voltage direct-current (HVDC) technology, and offshore wind farm-power systems dynamics. Zhe Chen (M'95-SM'98) received the B.Eng. and M.Sc. degrees from Northeast China Institute of Electric Power Engineering,

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“…Given the behavioral complexity of such a topology compared to conventional voltage source converters, however, significant research has been conducted over the last decade [2] on the modulation, inner dynamics modeling, and advanced control system design [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Impact of Grid Asymmetries on the Operation and Capacitive Energy Storage Design of Modular Multilevel Converters

Vasiladiotis

Cherix

Rufer

2015

IEEE Trans. Ind. Electron.

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The grid-connected Modular Multilevel Converter (MMC) is very likely to operate under asymmetric grid conditions. Such a converter features several unique characteristics, which make its analysis different from other types of power converters in similar cases. In this paper, the three well-established control techniques, i.e., balanced current and negative sequence current injection for active/reactive power oscillation elimination, are tailored for the MMC case taking into account grid current limitation under fault conditions. Since the focus is laid on the MMC design impact during grid asymmetries, the three methods are compared in terms of branch energy variation increase as well as maximum achievable active power transfer. Moreover, the effect of circulating current second-order harmonic injection for capacitive storage reduction as well as DC-link oscillation elimination is also studied. Finally, experimental results from a down-scaled laboratory prototype verify the theoretical studies.

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A Model-Based Control Scheme for Modular Multilevel Converters

Cited by 58 publications

References 12 publications

Submodule Capacitor Dimensioning for Modular Multilevel Converters

Submodule Capacitor Dimensioning for Modular Multilevel Converters

Voltage-Balancing Method for Modular Multilevel Converters Switched at Grid Frequency

Impact of Grid Asymmetries on the Operation and Capacitive Energy Storage Design of Modular Multilevel Converters

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