Now showing items 13-24 of 118

  • Modeling harmonics of networks supplying nonlinear loads 

    Lamich Arocas, Manuel; Balcells Sendra, Josep; Corbalán Fuertes, Montserrat; Sainz Sapera, Luis; Fernandez, Cristian (2014)
    Conference report
    Restricted access - publisher's policy
    This work presents the development and validation of a model for electric networks supplying nonlinear loads (NLL). The model is based on Neural Networks (NN) and its purpose is the prediction of harmonic currents sank by ...
  • Control to reduce leading current in a Shunt Hybrid power filter 

    Lamich Arocas, Manuel; Balcells Sendra, Josep; González Díez, David; Gago Barrio, Javier; Jaen Fernandez, Carles; Castillo Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Conference report
    Open Access
    The main drawback of Shunt Hybrid Filters is the need of leading current injection. This paper describes a strategy to reduce the leading current in a three phase four wires LC coupled parallel hybrid filter for harmonics ...
  • Training kit for power electronics teaching 

    Pérez Robles, Daniel; Balcells Sendra, Josep; Lamich Arocas, Manuel; Berbel Artal, Néstor; Zaragoza Bertomeu, Jordi; Mon González, Juan (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Conference report
    Restricted access - publisher's policy
  • 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)
    Conference report
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    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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Comparison of phase-shifted and level-shifted PWM in the modular multilevel converter 

    Darus, Rosheila; Konstantinou, Georgios; Pou Félix, Josep; Ceballos Recio, Salvador; Agelidis, Vassilios (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    This paper reports a comparison study of different carrier-based PWM techniques applied to the modular multilevel converter. Phase-disposition PWM (PD-PWM) and phase-shifted pulse-width modulation (PS-PWM) with non-interleaving ...
  • A modified voltage balancing sorting algorithm for the modular multilevel converter: Evaluation for staircase and phase-disposition PWM 

    Darus, Rosheila; Pou Félix, Josep; Konstantinou, Georgios; Ceballos Recio, Salvador; Agelidis, Vassilios (2014)
    Conference report
    Restricted access - publisher's policy
    This paper introduces a low complexity implementation of the voltage balancing sorting algorithm to reduce the switching frequency of the power devices in modular multilevel converters (MMCs). Two modulation techniques are ...
  • Operators to calculate the derivative of digital signals 

    Ferrer Arnau, Luis Jorge; Mon González, Juan; Parisi Baradad, Vicenç (2013)
    Conference lecture
    Open Access
    This paper presents an FIR operator with a very low computational cost for calculating the first derivative of discrete band-limited signals. The basic idea is to use cubic spline polynomials for interpolating among the ...
  • Decimator filter based on B-splines 

    Ferrer Arnau, Luis Jorge; Roset Juan, Francesc Xavier; Mon González, Juan; Parisi Baradad, Vicenç (2013)
    Conference report
    Open Access
    The cascaded integrator-comb (CIC) filters are widely used as decimators in many applications, such as in delta sigma AD converters to decimate the sampled signal on its output. One problem with these filters is that by ...
  • A new method to improve the total efficiency of parallel converters 

    Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
    Conference report
    Open Access
    This paper proposes a new methodology for efficiency optimization in systems composed by parallel converters. The proposed methodology takes into account the individual efficiency curves and determines the optimum ...
  • A simple control strategy to increase the total efficiency of multi-converter systems 

    Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
    Conference report
    Open Access
    This paper presents a simple control strategy that is employed together with an optimization methodology to achieve optimal efficiency in systems composed by multiple parallel converters. An external loop is responsible ...
  • Analysis of a voltage balancing technique with reduced switching transitions in a flying capacitor multilevel converter 

    Ghias, Amer M.Y.M.; Pou Félix, Josep; Agelidis, Vassilios; Ciobotaru, M. (2013)
    Conference report
    Open Access
    This paper reports the analysis of a voltage balancing technique based on optimal switching transitions for a flying capacitor (FC) multilevel converter using phase disposition pulse-width modulation. Since multiple switching ...