Virtual Submodule Concept Applied to the Modular Multilevel Converter

The design phase of a modular multilevel converter (MMC) needs to be supported by suitable tools for the submodule loss evaluation. This paper proposes a fast MMC cell loss calculation based on the virtual submodule (VSM) concept. Compared to other proposed tools, the impact of the circulating current control is directly taken into account and different modulation schemes can be easily compared. To verify the proposed concept, the results are compared with the losses obtained from a switched model with closed-loop control, where the analytical MMC key waveforms are approached in the steady state. The proposed method provides a great flexibility and a significant reduction of the simulation / computational time otherwise needed to evaluate SM losses under various operating conditions.


Published in:
Proceeding of PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, Germany, May 15-18, 2017, 145-152
Presented at:
PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, Germany, May 15-18, 2017
Year:
2017
Publisher:
Berlin, VDE VERLAG GMBH, 2017
ISBN:
978-3-8007-4424-4
Keywords:
Laboratories:




 Record created 2017-05-17, last modified 2018-03-20

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