Journal ArticleDOI
Modular Multilevel Converters for HVDC Applications: Review on Converter Cells and Functionalities
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In this article, the principle of modularity is used to derive the different multilevel voltage and current source converter topologies for high-power dc systems, where the derived converter cells are treated as building blocks and are contributing to the modularity of the system.Abstract:
In this paper, the principle of modularity is used to derive the different multilevel voltage and current source converter topologies. The paper is primarily focused on high-power applications and specifically on high-voltage dc systems. The derived converter cells are treated as building blocks and are contributing to the modularity of the system. By combining the different building blocks, i.e., the converter cells, a variety of voltage and current source modular multilevel converter topologies are derived and thoroughly discussed. Furthermore, by applying the modularity principle at the system level, various types of high-power converters are introduced. The modularity of the multilevel converters is studied in depth, and the challenges as well as the opportunities for high-power applications are illustrated.read more
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Journal ArticleDOI
Offset Voltage Control Scheme for Modular Multilevel Converter Operated in Nearest Level Control
TL;DR: In this paper, an offset voltage control scheme for the modular multilevel converter (MMC) operated in nearest level control (NLC) to improve the total harmonic distortion (THD) of AC phase voltages was proposed.
Journal ArticleDOI
A Critical Review on Hybrid-Topologies, Modulation Techniques, and Controlling Approaches of Modular Multilevel Converter for Grid Integration
TL;DR: In this article , a detailed review of multilevel converters is given, including its topological variants, modulation methods, modeling and capacitor voltage balancing techniques, fault-tolerant behavior, controlling approaches and future trends and challenges.
Journal ArticleDOI
Experimental Validation of a Quasi-Z-Source Modular Multilevel Converter With DC-Fault Blocking Capability
TL;DR: The design methodology and the modulation of the quasi-Z-source modular multilevel converter (qZS-MMC) with half-bridge submodules (HBSMs) is considered and its performance in the voltage boosting mode for medium voltage applications is evaluated.
Journal ArticleDOI
Improved sliding-mode control for MMC in DC power system
TL;DR: An improved SMC method is proposed in this study for inner-loop and circulating current controllers and has better dynamic response and robustness performance and can suppress chattering phenomenon substantially.
Multilevel current reinjection self-commutated HVDC converter
TL;DR: In this article, a self-commutated AC-DC converter is proposed based on the reinjection of multilevel DC pulses via the mid-point of the series double-bridge converter using a GTO-switched multitapped single-phase transformer.
References
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A New Neutral-Point-Clamped PWM Inverter
TL;DR: In this article, a neutral-point-clamped PWM inverter composed of main switching devices which operate as switches for PWM and auxiliary switching devices to clamp the output terminal potential to the neutral point potential has been developed.
Journal ArticleDOI
A New Neutral-Point-Clamped PWM Inverter
TL;DR: The neutral-point-clamped PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.
Proceedings ArticleDOI
Multilevel converters-a new breed of power converters
Jih-Sheng Lai,Fang Zheng Peng +1 more
TL;DR: This paper presents three multilevel voltage source converters: (1) diode-clamp, (2) flying-capacitors, and (3) cascaded-inverters with separate DC sources.
BookDOI
Wind Power in Power Systems
TL;DR: In this article, the authors focus on the generation of electricity from clean and renewable sources, and show that wind energy has become the world's fastest growing energy source, and that renewable energy is the most promising energy source.
Proceedings ArticleDOI
An innovative modular multilevel converter topology suitable for a wide power range
A. Lesnicar,Rainer Marquardt +1 more
TL;DR: In this article, a new multilevel converter topology suitable for very high voltage applications, especially network interties in power generation and transmission, is presented, and a suitable structure of the converter-control is proposed.
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