Capacitor voltage ripple shaping in modular multilevel converters allowing for operating region extension

@article{Ilves2011CapacitorVR,
  title={Capacitor voltage ripple shaping in modular multilevel converters allowing for operating region extension},
  author={Kalle Ilves and Antonios Antonopoulos and Lennart Harnefors and Staffan Norrga and Lennart Angquist and Hans-Peter Nee},
  journal={IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society},
  year={2011},
  pages={4403-4408}
}
The second-order harmonic in the circulating current of a modular multilevel converter (M2C) influences the capacitor voltage ripple. If no measures are taken to control it, it is not possible to operate the converter with unity modulation index. An open-loop method that precalculates the instantaneous values of the circulating current and the capacitor… CONTINUE READING

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