Enviaments recents

  • Secondary switched control with no communications for islanded microgrids 

    Rey, Juan M; Martí Colom, Pau; Velasco García, Manel; Miret Tomàs, Jaume; Castilla Fernández, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2017-05-12)
    Article
    Accés obert
    Flexibility and reliability of AC microgrids are enhanced by reducing the dependence on communications in multi-layer hierarchical control. In this sense, this paper presents a secondary control with no communications for ...
  • Frequency-modulation control of a DC/DC current-source parallel-resonant converter 

    Moradi Ghahderijani, Mohammad; Castilla Fernández, Miguel; Momeneh, Arash; Tomas Miret, Jaume; García de Vicuña Muñoz de la Nava, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2017-07-01)
    Article
    Accés obert
    This paper proposes a frequency-modulation control scheme for a dc/dc current-source parallel-resonant converter with two possible configurations. The basic configuration comprises an external voltage loop, an internal ...
  • Variable structure control for three-phase LCL-filtered inverters using a reduced converter model 

    Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Hoz Casas, Jordi de la (Institute of Electrical and Electronics Engineers (IEEE), 2017-06-16)
    Article
    Accés obert
    This paper presents a new concept in active damping techniques using a reduced model of a LCL-filtered grid connected inverter. The presence of the LCL filter complicates the design of the inverter control scheme, particularly ...
  • Variable structure control in natural frame for three-phase grid-connected inverters with LCL filter 

    Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Martín Cañadas, María Elena (2017-07-05)
    Article
    Accés obert
    This paper presents a variable structure control in natural frame for a three-phase voltage source inverter. The proposed control method is based on modifying the converter model in natural reference frame, preserving the ...
  • Energy dissipation in the presence of sub-harmonic excitation in dynamic atomic force microscopy 

    Chiesa, Matteo; Gadelrab, Karim Raafat; Verdaguer, Albert; Segura, Juan José; Barcons Xixons, Víctor; Thomson, Neil H.; Phillips, M.A.; Stefancich, M.; Santos Hernández, Sergio (2012-09)
    Article
    Accés obert
    Amplitude modulation atomic force microscopy allows quantifying energy dissipation in the nanoscale with great accuracy with the use of analytical expressions that account for the fundamental frequency and higher harmonics. ...
  • Cantilever dynamics in amplitude modulation AFM: continuous and discontinuous transitions 

    Santos Hernandez, Sergio; Barcons Xixons, Víctor; Font Teixidó, Josep; Thomson, Neil H. (2010-06-21)
    Article
    Accés obert
    Transitions between the attractive and the repulsive force regimes for amplitude modulation atomic force microscopy (AFM) can be either discontinuous, with a corresponding jump in amplitude and phase, or continuous and ...
  • Performance evaluation of secondary control policies with respect to digital communications properties in inverter-based islanded microgrids 

    Martí Colom, Pau; Velasco García, Manel; Martín Rull, Enric Xavier; García de Vicuña Muñoz de la Nava, José Luis; Miret Tomàs, Jaume; Castilla Fernández, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2016-09-12)
    Article
    Accés obert
    A key challenge for inverted-based microgrids working in islanded mode is to maintain their own frequency and voltage to a certain reference values while regulating the active and reactive power among distributed generators ...
  • Model-based active damping control for three-phase voltage source inverters with LCL filter 

    Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Morales López, Javier; Castilla Fernández, Miguel; Miret Tomàs, Jaume (2016-09-02)
    Article
    Accés obert
    This paper presents a robust model-based active damping control in natural frame for a three-phase voltage source inverter with LCL filter. The presence of the LCL filter complicates the design of the control scheme, ...
  • Evaluating the 2014 retroactive regulatory framework applied to the grid connected PV systems in Spain 

    Hoz Casas, Jordi de la; Martín Cañadas, María Elena; Miret Tomàs, Jaume; Castilla Fernández, Miguel; Guzmán Solà, Ramon (2016-05-15)
    Article
    Accés obert
    © 2016 Elsevier Ltd. The RD 413/2014 new economic and regulatory framework for producers of electricity from renewable energy sources in Spain has been here analysed, putting the focus on its impact on the economic results ...
  • Comparative study of reactive power control methods for photovoltaic inverters in low-voltage grids 

    Momeneh, Arash; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Martí Colom, Pau; Velasco García, Manel (2016-03-01)
    Article
    Accés obert
    The increasing installation of photovoltaic panels in low-voltage grids causes an over voltage problem, especially during high production and low consumption periods. Generally the over voltage problem is overcome by ...

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