Now showing items 1-6 of 6

  • A low-disturbance diagnostic function integrated in the PV arrays' MPPT algorithm 

    Sera, Dezso; Mathe, L.; Kerekes, Tamas; Teodorescu, Remus; Rodríguez Cortés, Pedro (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    This paper focuses on the estimation of series resistance changes for flat silicone PV panels or arrays during operation, without moving the operating point far away from the Maximum Power Point1. The method is based ...
  • 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 ...
  • 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 ...
  • The PWM strategies of grid-connected distributed generation active NPC inverters 

    Ma, Lin; Kerekes, Tamas; Teodorescu, Remus; Jin, Xinmin; Liserre, M.; Rodríguez Cortés, Pedro (2009)
    Conference lecture
    Open Access
    The Neutral Point Clamped topology due to high efficiency, low leakage current and EMI, its integration is widely used in the distributed generation (DG) systems. However the main disadvantage of the NPC inverter is ...