Ara es mostren els items 30-38 de 38

    • SiC modular multilevel converters: sub-module voltage ripple analysis and efficiency estimations 

      Perez Basante, Angel; Pou Félix, Josep; Ceballos Recio, Salvador; Gil De Muro, Asier; Pujana, Ainhoa; Ibañez, Pedro (2014)
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      Accés restringit per política de l'editorial
      Two important technical challenges associated with the Modular Multilevel Converter (MMC) are the reduction of the voltage ripple of the Sub-Module (SM) capacitors and the reduction of the converter losses. This paper ...
    • Single-carrier phase-disposition PWM techniques for multiple interleaved voltage-source converter legs 

      Konstantinou, Georgios; Capellá Frau, Gabriel José; Pou, Josep; Ceballos Recio, Salvador (Institute of Electrical and Electronics Engineers (IEEE), 2017-10-26)
      Article
      Accés obert
      Interleaved converter legs are typically modulated with individual carriers per leg and phase-shifted PWM (PS-PWM) as it facilitates current balancing amongst the legs. Phase-disposition PWM (PD-PWM), despite the better ...
    • Study and comparison of discontinuous modulation for modular multilevel converters in motor drive applications 

      Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Ceballos Recio, Salvador; Konstantinou, Georgios; Capellá Frau, Gabriel José (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-01)
      Article
      Accés obert
      Discontinuous modulation applied to modular multilevel converters is an effective method for reducing the capacitor voltage ripples. In this paper, the discontinuous modulation is adapted and used in a motor drive application. ...
    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Submodule power losses balancing algorithms for the modular multilevel converter 

      Picas Prat, Ricard; Pou, Josep; Zaragoza Bertomeu, Jordi; Watson, Alan; Konstantinou, Georgios; Ceballos Recio, Salvador; Clare, John (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may ...
    • Survey on fault operation on multilevel inverters 

      Lezana, Pablo; Pou Félix, Josep; Meynard, Thierry A.; Rodríguez, José; Ceballos Recio, Salvador; Richardeau, Frédéric (2010-07-01)
      Article
      Accés obert
      This paper is related to faults that can appear in multilevel (ML) inverters, which have a high number of components. This is a subject of increasing importance in high-power inverters. First, methods to identify a fault ...
    • Utilising redundant voltage levels for circulating current control in modular multilevel converters 

      Konstantinou, Georgios; Pou Félix, Josep; Ceballos Recio, Salvador; Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Agelidis, Vassilios (2015)
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      Accés obert
    • 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
      Accés obert
      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 ...
    • Varying and unequal carrier frequency PWM techniques for modular multilevel converters 

      Konstantinou, Georgios; Darus, Rosheila; Pou Félix, Josep; Ceballos Recio, Salvador; Agelidis, Vassilios (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Carrier-based pulse-width modulation (PWM) strategies are commonly applied to modular multilevel converters (MMC). This paper proposes a modified PWM technique with unequal and varying carrier frequencies between consecutive ...