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@PHDTHESIS{Hu:763285,
      author       = {Hu, Jingxin},
      othercontributors = {de Doncker, Rik W. and Kolar, Johann W.},
      title        = {{M}odulation and dynamic control of intelligent
                      dual-active-bridge converter based substations for flexible
                      dc grids; 1. {A}uflage},
      volume       = {69},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {E.ON Energy Research Center, RWTH Aachen University},
      reportid     = {RWTH-2019-06213},
      series       = {E.ON Energy Research Center : PGS, Power Generation and
                      Storage Systems},
      pages        = {1 Online-Ressource (VI, 138 Seiten) : Illustrationen,
                      Diagramme},
      year         = {2019},
      note         = {Auch veröffentlicht auf dem Publikationsserver der RWTH
                      Aachen University; Dissertation, RWTH Aachen University,
                      2019},
      abstract     = {This dissertation proposes improved modulation and dynamic
                      control of high-power three-phase dual-active bridge (DAB3)
                      dc-dc converters to enhance the operating performance and
                      functionalities of intelligent dc substations in dc-grid
                      applications. With the increasing integration of renewable
                      energies, energy storage systems and the emerging fast
                      charging stations for electric vehicles, dc distributions
                      grids present numerous advantages e.g. higher efficiency,
                      higher power capability and higher flexibility compared to
                      existing ac grids. The key enabling component of flexible dc
                      grids is the intelligent dc substation based on high-power
                      dc-dc converters, which needs to achieve high efficiency
                      over a wide voltage and power range, control the power flow
                      and grid voltage dynamically, and ride through dc
                      short-circuit faults. By employing the proposed asymmetrical
                      duty cycle control method, the soft-switching range of the
                      DAB3 converter is significantly extended over a wide voltage
                      range especially in light-load conditions. Thereafter, the
                      dissertation also introduces a novel method to control the
                      transformer winding current and magnetizing flux of the DAB3
                      converter instantaneously and simultaneously under transient
                      conditions. Thereby, the dc substation can control the power
                      flow dynamically without causing transformer core
                      saturation. Finally, a dc fault ride-through method for the
                      DAB3 converter is proposed, which enables the breakerless
                      protection of dc grids.},
      cin          = {614510 / 616400 / 614500},
      ddc          = {621.3},
      cid          = {$I:(DE-82)614510_20140620$ / $I:(DE-82)616400_20140620$ /
                      $I:(DE-82)614500_20201203$},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      doi          = {10.18154/RWTH-2019-06213},
      url          = {https://publications.rwth-aachen.de/record/763285},
}