Evaluation of MMCs for High-Power Low-Voltage DC-Applications in Combination with the Module LLC-Design

@article{Unruh2020EvaluationOM,
  title={Evaluation of MMCs for High-Power Low-Voltage DC-Applications in Combination with the Module LLC-Design},
  author={Roland Unruh and Frank Schafmeister and Joachim B{\"o}cker},
  journal={2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)},
  year={2020},
  pages={P.1-P.10}
}
In this paper, a full-bridge modular multilevel converter (MMC) and two half-bridge-based MMCs are evaluated for high-current low-voltage e.g. 100 – 400V DC-applications such as electrolysis, arc welding or datacenters with DC-power distribution. Usually, modular multilevel converters are used in high-voltage DC-applications (HVDC) in the multiple kV-range, but to meet the needs of a high-current demand at low output voltage levels, the modular converter concept requires adaptations. In the… Expand

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References

SHOWING 1-10 OF 48 REFERENCES
1-MW Full-Bridge MMC for High-Current Low-Voltage (100V-400V) DC-Applications
A full-bridge modular multilevel converter (MMC) is compared to a half-bridge-based MMC for high-current low-voltage DC-applications such as electrolysis, arc welding or datacenters with DC-powerExpand
MMC-Topology for High-Current and Low-Voltage Applications with Minimal Number of Submodules, Reduced Switching and Capacitor Losses
TLDR
This paper proposes a topology that uses only half the number of submodules and moreover to reduce the effective switching frequency by a third, while preserving the same THD und output power of an YY-MMC. Expand
High-current variable-voltage rectifiers: state of the art topologies
Applications such as electrolysis, electrowinning, DC arc furnaces and plasma torches require high-current (several kA) power supplies at low-voltage levels (few hundreds of volts). In this study,Expand
A modular multilevel converter based high-power high-current power supply
This paper presents a power supply for high power and high current DC applications. Presently thyristor rectifiers along with passive filters are used in these applications, which suffer from poorExpand
Reliability of Capacitors for DC-Link Applications in Power Electronic Converters—An Overview
TLDR
This review serves to provide a clear picture of the state-of-the-art research in this area and to identify the corresponding challenges and future research directions for capacitors and their dc-link applications. Expand
Average-Current-Based Conduction Losses Model of Switched Capacitor Converters
A generic modeling methodology that analyzes the losses in switched capacitor converters (SCC) operating in open loop was developed and verified by simulation and experiments. The proposed analyticalExpand
A Comparative Study on Si-SJ-MOSFETs vs. GaN-HEMTs Used for LLC-Single-Stage Battery Charger
It is a common practice to charge batteries with a pure DC current. For this purpose, a bank of fast-aging electrolytic capacitors is usually used in single-phase battery chargers to suppress the lowExpand
Analysis on Load-Adaptive Phase-Shift Control for High Efficiency Full-Bridge LLC Resonant Converter Under Light-Load Conditions
Recently, the full-bridge (FB) LLC resonant converter is getting more attention due to its zero-voltage switching of the primary switches, zero-current switching of rectifier diodes, and high powerExpand
Two-phase interleaving configuration of the LLC resonant converter - Analysis and experimental evaluation
TLDR
This paper investigates the load sharing issue of two LLC converters connected in parallel and operated with interleaved driving signals and presents a simple and practical solution applicable to a high power server PSU. Expand
Trade-Off Strategies in Designing Capacitor Voltage Balancing Schemes for Modular Multilevel Converter HVDC
This paper focuses on the engineering trade-offs in designing capacitor voltage balancing schemes for modular multilevel converters (MMC) HVDC: regulation performance and switching loss. MMC isExpand
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