Back-to-back hybrid modular multilevel converters for ac motor drive

Guan, Mingxu; Li, Binbin; Zhou, Shaoze; Xu, Dianguo

doi:10.1109/iecon.2017.8216308

Cited by 9 publications

(9 citation statements)

References 11 publications

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“…21 can be further improved. In [72], the grid‐side MMC was modified into a hybrid one, where the upper arms consist of FBs SMs and the lower arms half‐bridge SMs. Moreover, the motor‐side MMC is changed into an HB‐MMC.…”

Section: Modified Operation‐mode Methodsmentioning

confidence: 99%

Review on low‐frequency ripple suppression methods for MMCs for medium‐voltage drive applications

Wang

Chen

Liao

et al. 2018

IET Power Electronics

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Advantages of the modular multilevel converter (MMC) such as modularity, scalability, fault-tolerant ability, low device switching frequency, transformerless grid connection etc. have made it the most promising converter topology for medium-tohigh-voltage, high-power applications. However, in MMC-based medium-voltage drives, the excessive fundamental-frequency submodule capacitor voltage ripple at low speeds or start-up poses a major technological challenge. A lot of low-frequency ripple suppression methods have been proposed to address this problem. This study summarises the state of the art in this area and classifies these methods into three categories. The pros and cons of them are discussed. An in-depth analysis of these methods from a practical viewpoint is given. Some future research trends are also discussed.

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Section: Modified Operation‐mode Methodsmentioning

confidence: 99%

Review on low‐frequency ripple suppression methods for MMCs for medium‐voltage drive applications

Wang

Chen

Liao

et al. 2018

IET Power Electronics

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“…As full speed range is required, while at LFv s /ω s = const. (12), is enabled through the use of bipolar FB SMs in the grid-side stage, as presented in Fig. 2.…”

Section: A Machine-side Stagementioning

confidence: 99%

“…A two-quadrant solution is proposed in [11], utilizing Cascaded H-Bridge (CHB) as the grid-side stage. In [12], hybrid gridside MMC stage is proposed, while two fixed-frequency operating points of the machine were observed. The use of Full-Bridge (FB) grid-side MMC stage is discussed to some extent in [13].…”

Section: Introductionmentioning

confidence: 99%

Highly Flexible Indirect Modular Multilevel Converter for High Power Pumped Hydro Storage Plants

Basic

Schwery

Dujić

2020

IECON 2020 the 46th Annual Conference of the IEEE Industrial Electronics Society

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As fossil-fuel-and nuclear-based generating facilities are being phased-out in favor of intermittent renewable energy sources, the need for large scale, highly flexible balancing storage is imminent. By the generating capacity of readily available units, enormous potential lays in retrofitting of large pumped hydro storage plants to variable speed operation, increasing their flexibility to meet future power system demands. Indirect Modular Multilevel Converter is a highly scalable and inherently redundant topology that meets the power and voltage ratings of large pumped hydro generating units. Variable DC link converter operation, offering common-mode-free machine-side operation has been evaluated, considering constraints in retrofit of old machines, not designed for converter-fed operation. Performance evaluation over the entire operating range of the plant is performed. Grid support dynamics has been assessed. Finally, application-specific challenges in the design stage are pointed out.

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“…However, both the grid-side and machine-side MMCs require full-bridge SMs, which greatly increases the number of devices. Although Guan et al [20] and Li et al [21] reduce the devices of BTB-MMCs, the stable operation under rated torque at zero speed cannot be ensured. The variable dc voltage methods have limitation to suppress the capacitor voltage fluctuation of MMCs for medium-voltage low-speed drive, which require large SM capacitance [15], [18].…”

Section: Introductionmentioning

confidence: 99%

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

Zhang

Deng

Hou

et al. 2023

IEEE Trans. Ind. Electron.

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Back-to-back hybrid modular multilevel converters for ac motor drive

Cited by 9 publications

References 11 publications

Review on low‐frequency ripple suppression methods for MMCs for medium‐voltage drive applications

Review on low‐frequency ripple suppression methods for MMCs for medium‐voltage drive applications

Highly Flexible Indirect Modular Multilevel Converter for High Power Pumped Hydro Storage Plants

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

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