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Browsing NTNU Open by Author "Garcia Rosa, Paula Bastos"

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    • Discussion on the mode mixing in wave energy control systems using the Hilbert-Huang transform 

      Garcia Rosa, Paula Bastos; Molinas Cabrera, Maria Marta; Fosso, Olav B (Peer reviewed; Journal article, 2019)
      A great improvement in the absorption of energy of a wave energy converter (WEC) is obtained with a time-varying power take-off (PTO) damping over a constant damping. In a passive control scheme based on the Hilbert-Huang ...
    • Effect of non-ideal power take-off on the electric output power of a wave energy converter under suboptimal control 

      Pettersen, Martine F.; Fosso, Olav B; Garcia Rosa, Paula Bastos; Molinas Cabrera, Maria Marta (Chapter, 2021)
      This work investigates how the physical limitations and losses of an electric power takeoff (PTO) system affect the production of power for a wave energy converter (WEC) under suboptimal control strategies. The damping of ...
    • Evaluation of wave-frequency motions extraction from dynamic positioning measurements using the empirical mode decomposition 

      Garcia Rosa, Paula Bastos; Brodtkorb, Astrid H.; Sørensen, Asgeir Johan; Molinas Cabrera, Maria Marta (Chapter, 2019)
      For dynamic positioning operations, high-frequency wave induced motions cause excessive control action, and consequently additional power consumption and wear of actuators in the propulsion system. Thus, such operations ...
    • A Hierarchical Wind Power Plant Supervisory Controller 

      Merz, Karl Otto; Kölle, Konstanze; Garcia Rosa, Paula Bastos; Chabaud, Valentin Bruno (SINTEF Rapport;, Research report, 2020)
    • Placement of virtual inertia from HVDC terminals based on a frequency deviation index 

      Garcia Rosa, Paula Bastos; D'Arco, Salvatore; Suul, Jon Are Wold (Chapter, 2021)
      This paper presents an approach for assessing the most suitable locations to provide virtual inertia by HVDC converters. A frequency deviation index quantifying the maximum distance in Hz from each bus in the power system ...
    • Stabilizing Control of an Unmanned Surface Vehicle Pushing a Floating Load 

      Rosario, Rafael Vida Castro; Cunha, Jose Paulo V.S.; Garcia Rosa, Paula Bastos (Peer reviewed; Journal article, 2020)
      In this paper, the automatic control of a single unmanned surface vehicle (USV) pushing a floating load is developed and theoretically analyzed. This represents a challenging control problem, since the manipulated load is ...
    • Switching sequences for non-predictive declutching control of wave energy converters 

      Garcia Rosa, Paula Bastos; Fosso, Olav B; Molinas Cabrera, Maria Marta (Peer reviewed; Journal article, 2021)
      Aiming at improving the energy absorption from waves, a number of studies have considered declutching control - a phase-control method that consists of disengaging the power take-off (PTO) system from the oscillating body ...
    • The impact of time-frequency estimation methods on the performance of wave energy converters under passive and reactive control 

      Garcia Rosa, Paula Bastos; Ringwood, John V.; Fosso, Olav B; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2018)
      A number of wave energy controllers tune the power take-off (PTO) system to the frequency of incident waves. Since real ocean waves are non-stationary by nature and not defined by a single frequency component, the PTO can ...

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