Now showing items 1-8 of 8

  • A three-phase frequency-adaptive phase-locked loop for independent single-phase operation 

    Mirhosseini, Mitra; Pou Félix, Josep; Agelidis, Vassilios; Robles Sestafe, Eider; Ceballos Recio, Salvador (2014-12-01)
    Article
    Restricted access - publisher's policy
    This letter proposes a phase-locked loop (PLL) able to operate as an independent single-phase PLL in the context of three-phase systems. Its key advantage is that the extracted information allows the independent control ...
  • Current balancing strategy in parallel-connected legs of power inverters 

    Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Capellá Frau, Gabriel José; Gabiola, Igor; Salvador, Ceballos; Robles Sestafe, Eider (EPE Association, 2009-10-31)
    Conference lecture
    Open Access
    The parallel connection of inverter legs is a way to increase the output currents and thus the converter rated power. The connection is made by inductors and a critical issue is to achieve balanced currents among the legs. ...
  • Efficiency optimization in low inertia wells turbine-oscillating water column devices 

    Ceballos Recio, Salvador; Rea, Judy; López, Iraide; Pou Félix, Josep; Robles Sestafe, Eider; Osullivan, Dara (2013-09)
    Article
    Restricted access - publisher's policy
    The Wells turbine is a bidirectional air turbine which operates efficiently over a restricted range of air flow. The optimization of its efficiency requires control of rotational velocity in order to maintain the ratio ...
  • Grid sequence detector based on a stationary reference frame 

    Robles Sestafe, Eider; Pou Félix, Josep; Ceballos Recio, Salvador; Gabiola, Igor; Santos, Maider (2010-06)
    Article
    Open Access
    This paper proposes a new three-phase positive sequence detector. The scheme is based on a stationary reference frame and a Moving Average Filter (MAF) that guarantees the complete cancellation of harmonics and grid ...
  • Grid sequence detector based on a stationary reference frame 

    Robles Sestafe, Eider; Pou Félix, Josep; Salvador, Ceballos; Gabiola, Igor; Maider, Santos (EPE Association, 2009-10-31)
    Conference report
    Open Access
    This paper proposes a new three-phase positive sequence detector. The scheme is based on a stationary reference frame and a Moving Average Filter (MAF) that guarantees the complete cancellation of harmonics and grid ...
  • Parallel-connected legs in a grid-tied inverter system for distributed generation 

    Capellá Frau, Gabriel José; Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Ceballos Recio, Salvador; Gabiola, Igor; Robles Sestafe, Eider (2011)
    Conference lecture
    Open Access
    Grid-connected high-power inverters are often used in distributed generation and power quality systems. Those inverters have to handle high currents in order to achieve high power values without resorting to higher ...
  • Study and experimental verification of control tuning strategies in a variable speed wind energy conversion system 

    Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Arias Pujol, Antoni; Spiteri, Cyril; Robles Sestafe, Eider; Ceballos Recio, Salvador (2011-05)
    Article
    Restricted access - publisher's policy
    This paper analyzes and compares different control tuning strategies for a variable speed wind energy conversion system (WECS) based on a permanent-magnet synchronous generator (PMSG). The aerodynamics of the wind turbine ...
  • Variable-Frequency Grid-Sequence Detector Based on a Quasi-Ideal Low-Pass Filter Stage and a Phase-Locked Loop 

    Robles Sestafe, Eider; Ceballos Recio, Salvador; Pou Félix, Josep; Martin, Jose Luis; Zaragoza Bertomeu, Jordi; Ibáñez, P. (2010-09)
    Article
    Open Access
    This paper proposes a filtered-sequence phase-locked loop (FSPLL) structure for detection of the positive sequence in three-phase systems. The structure includes the use of the Park transformation and moving average ...