Now showing items 1-16 of 16

  • A new high-efficiency single-phase transformerless PV inverter topology 

    Kerekes, Tamas; Teodorescu, Remus; Rodríguez Cortés, Pedro; Vázquez Guzmán, Gerardo; Aldabas Rubira, Emiliano (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-01)
    Article
    Open Access
    There is a strong trend in the photovoltaic inverter technology to use transformerless topologies in order to acquire higher efficiencies combining with very low ground leakage current. In this paper, a new topology, ...
  • A photovoltaic three-phase topology to reduce common mode voltage 

    Vázquez Guzmán, Gerardo; Kerekes, Tamas; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro; Teodorescu, Remus; Aguilar, Daniel (2010)
    Conference report
    Open Access
    At the present time most of the photovoltaic (PV) applications require to be integrated to the electrical grid. There are mainly two types of PV systems: with galvanic isolation (transformer) and transformerless. PV ...
  • Adaptive hysteresis band current control for transformerless single-phase PV inverters 

    Vázquez Guzmán, Gerardo; Rodríguez Cortés, Pedro; Ordoñez, Rafael; Kerekes, Tamas; Teodorescu, Remus (2009)
    Conference report
    Open Access
    Current control based on hysteresis algorithms are widely used in different applications, such as motion control, active filtering or active/reactive power delivery control in distributed generation systems. The hysteresis ...
  • An approach to the performance-oriented model of variable-speed wind turbines 

    Rolán Blanco, Alejandro; Luna Alloza, Álvaro; Rocabert Delgado, Joan; Aguilar Galván, Daniel; Vázquez Guzmán, Gerardo (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference lecture
    Open Access
    The aim of this work is to give an approach to the Performance-Oriented Model of Variable-Speed Wind turbines (VSWTs) equipped with permanent magnet synchronous generator (PMSG), and compare it to the component-oriented model. ...
  • Common-mode voltage cancellation in single- and three-phase transformer-less PV power converters 

    Vázquez Guzmán, Gerardo (Universitat Politècnica de Catalunya, 2013-02-04)
    Doctoral thesis
  • Constant common mode voltage modulation strategy for the FB10 power converter 

    Rodríguez Cortés, Pedro; Muñoz Aguilar, Raúl Santiago; Vázquez Guzmán, Gerardo; Candela García, José Ignacio; Teodorescu, Remus (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    In this paper a modulation strategy based on the classical space vector modulation is applied to the FB10 converter, a new converter topology for PV applications. Firstly, the FB10 converter is presented and the ...
  • DCM-232 converter: a PV transformerless three-phase inverter 

    Rodríguez Cortés, Pedro; Muñoz Aguilar, Raúl Santiago; Vázquez Guzmán, Gerardo; Candela García, José Ignacio; Aldabas Rubira, Emiliano; Etxeberria Otadui, Ion (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    Nowadays transformerless PV converters are widely used in the energy conversion stage of a PV plant, because their good characteristics regarding efficiency, size, cost and weight. The main problem in transformerless ...
  • Grid synchronization for advanced power processing and FACTS in wind power systems 

    Luna Alloza, Álvaro; Rocabert Delgado, Joan; Vázquez Guzmán, Gerardo; Rodríguez Cortés, Pedro; Teodorescu, Remus; Córcoles López, Felipe (2010)
    Conference report
    Open Access
    The high penetration of wind power systems in the electrical network has introduced new issues in the stability and transient operation of the grid. By means of providing advanced functionalities to the existing power ...
  • Intelligent control agent for transient to an island grid 

    Rocabert Delgado, Joan; Azevedo, Gustavo; Vázquez Guzmán, Gerardo; Candela García, José Ignacio; Rodríguez Cortés, Pedro; Guerrero Zapata, Josep Maria (2010)
    Conference report
    Open Access
    The increasing penetration of generation power plants based on renewable energies in the electrical networks has boosted the number of systems connected to the grid. In this scenario the microgrid, providing advanced ...
  • Losses and CMV evaluation in transformerless grid-connected PV topologies 

    Vázquez Guzmán, Gerardo; Kerekes, Tamas; Rolán Blanco, Alejandro; Aguilar Gaván, Daniel; Luna Alloza, Álvaro; Acevedo, Gustavo (2009)
    Conference lecture
    Open Access
    Controlling the thermal losses in the semiconductors ~s well. as the Co~mon Mode Voltage (CMV), are important Issues In the design of power electronics converters for photovoltaic applications. At present time there are ...
  • Modeling and simulation of synchronous machine and its behaviour against voltage sags 

    Aguilar Gaván, Daniel; Luna Alloza, Álvaro; Rolán Blanco, Alejandro; Vázquez Guzmán, Gerardo; Acevedo, Gustavo (2009)
    Conference lecture
    Open Access
    This paper studies the effects of voltage sags (dips), both symmetrical and unsymmetrical, on the three-phase Synchronous Machine (SM). The vast majority of the electrical power generation systems in the world is consist ...
  • Modeling of a variable speed wind turbine with a permanent magnet synchronous generator 

    Rolán Blanco, Alejandro; Luna Alloza, Álvaro; Vázquez Guzmán, Gerardo; Aguilar Gaván, Daniel; Acevedo, Gustavo (2009)
    Conference lecture
    Open Access
    The aim of this work is to analyze a typical configuration of a Wind Turbine Generator System (WTGS) equipped with a Variable Speed Generator. Nowadays, doublyfed induction generators are being widely used on WTGS, although ...
  • New control strategy to allow the photovoltaic systems operation under grid faults 

    Azevedo, Gustavo M.S.; Rodríguez Cortés, Pedro; Cavalcanti, Marcelo C.; Vázquez Guzmán, Gerardo; Neves, F. (2009)
    Conference lecture
    Open Access
    This paper presents a new control strategy that allows the photovoltaic system operation under grid faults without overcurrent and assuring grid sinusoidal currents. The current limiter is made indirectly by using an ...
  • Photovoltaic plants generation improvement using Li-ion batteries as energy buffer 

    Beltran, H.; Swierczynski, M.; Luna Alloza, Álvaro; Vázquez Guzmán, Gerardo; Belenguer, E. (IEEE Industrial Electronics Society, 2011)
    Conference report
    Restricted access - publisher's policy
    This paper analyzes the PV power plants operability improvement obtained when introducing energy storage (ES) systems which allow decoupling the power received from the sun on the photovoltaic (PV) panels from the power ...
  • Simulation of wound rotor synchronous machine under voltage sags 

    Aguilar Galván, Daniel; Vázquez Guzmán, Gerardo; Rolán Blanco, Alejandro; Rocabert Delgado, Joan; Córcoles López, Felipe; Rodríguez Cortés, Pedro (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference lecture
    Open Access
    This paper presents a study of the Wound Rotor Synchronous Machine (SM) stability under voltage sags (dips). Machine behavior has been analyzed by considering different magnitudes (or depths) and duration of the sag. ...
  • Symmetrical ripple constant common mode voltage modulation strategy for DCM-232 three- phase PV topology 

    Rodríguez Cortés, Pedro; Muñoz Aguilar, Raúl Santiago; Vázquez Guzmán, Gerardo; Candela García, José Ignacio; Aldabas Rubira, Emiliano; Etxeberria Otadui, Ion (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    In this paper a modulation strategy for the DCM-232 power converter is proposed. This modulation has as particular a symmetrical ripple and that no common mode currents are presented. Some simulation and experimental ...