Now showing items 1-7 of 7

    • 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 new PWM strategy for grid-connected half-bridge active NPC converters with losses distribution balancing mechanism 

      Ma, Lin; Kerekes, Tamas; Rodríguez Cortés, Pedro; Jin, Xinmin; Teodorescu, Remus; Liserre, Marco (2015-01-09)
      Article
      Open Access
      Photovoltaic systems technological development is driven by the request for higher efficiency and safety. These concerns influence also the choice of the power converter stage. Several topologies have been proposed and ...
    • 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 ...