Now showing items 1-12 of 12

    • Centralized synchronous controller based on load angle regulation for photovoltaic power plants 

      Verdugo Retamal, Cristian Andrés; Tarraso Martínez, Andrés; Candela García, José Ignacio; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2021-02)
      Article
      Open Access
      The integration of renewable energies based on photovoltaic power plants (PVPPs) is increasing exponentially fast. In consequence, stability problems associated with the lack of inertia are becoming a serious concern. ...
    • Energy balancing with wide range of operation in the isolated multi-modular converter 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2020-05-04)
      Article
      Open Access
      The series-connection of modules in multilevel converters are prone to energy imbalances in the dc capacitor due to the differences between the power absorbed and consumed. In renewable energy applications where the primary ...
    • Five-level T-type cascade converter for rooftop grid-connected photovoltaic systems 

      Verdugo Retamal, Cristian Andrés; Kouro, Samir; Rojas, Christian A.; Pérez, Marcelo A.; Meynard, Thierry A.; Malinowski, Mariusz (2019-05-08)
      Article
      Open Access
      Multilevel converters are widely considered to be the most suitable configurations for renewable energy sources. Their high-power quality, efficiency and performance make them interesting for PV applications. In low-power ...
    • Integrated series transformer in cascade converters for photovoltaic energy systems 

      Verdugo Retamal, Cristian Andrés; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (2018)
      Conference report
      Open Access
      This paper proposes a novel configuration for photovoltaic applications based on a cascade converter topology. The series connection between modules is achieved through the magnetic core of the integrated series transformer, ...
    • Model and control of the isolated multi-modular converter 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Blaabjerg, Frede; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Open Access
      Multi-modular converters have proven to be one of the most suitable topology to be used in high and power applications. The modularity of these configurations offer several advantages, such as: high quality voltage, ...
    • Multilevel single phase isolated inverter with reduced number of switches 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (2018)
      Conference report
      Open Access
      This paper proposes a cascaded single phase multilevel inverter using an off-the-shelf three-phase inverter and transformer. The concept is based on a cascaded connection of two inverter legs using a typical three phase ...
    • Photovoltaic power converter for large scale applications 

      Verdugo Retamal, Cristian Andrés (Universitat Politècnica de Catalunya, 2021-07-23)
      Doctoral thesis
      Open Access
      Most of large scale photovoltaic systems are based on centralized configurations with voltage source converters of two or three output voltage levels connected to photovoltaic panels. With the development of multilevel ...
    • Power station for large scale photovoltaic power plants 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2017)
      Conference report
      Restricted access - publisher's policy
      Most of the large scale photovoltaic power plants (LS-PVPP) count on power converters with a central configuration. Advantages such as robustness, low maintenance and installation cost makes this configuration the preferred ...
    • Re-synchronization strategy for the synchronous power controller in HVDC systems 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2017)
      Conference report
      Restricted access - publisher's policy
      Frequency and voltage regulation are required to support the grid under different scenarios. In order to handle these scenarios, classical control strategies demand complex systems to fulfill these requirements. However, ...
    • Synchronous frequency support of photovoltaic power plants with inertia emulation 

      Verdugo Retamal, Cristian Andrés; Tarraso Martínez, Andrés; Candela García, José Ignacio; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      Grid stability is one of the main concerns in renewable energies. The lack of inertia and their low capability to provide frequency support has created the need for implementing new control strategies to solve this problem. ...
    • Synchronous power controller for distributed generation units 

      Tarraso Martínez, Andrés; Verdugo Retamal, Cristian Andrés; Lai, Ngoc-Bao; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      Renewable energies has shown to be a promising solution to improve the energy injected to the electrical network. However, the lack of inertia in such systems have proven to affect the grid stability, as those technologies ...
    • Three-phase isolated multi-modular converter in renewable energy distribution systems 

      Verdugo Retamal, Cristian Andrés; Candela García, José Ignacio; Blaabjerg, Frede; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-25)
      Article
      Open Access
      Multilevel converters are widely used in medium and high voltage applications. Their high performance, power quality, efficiency and smaller filters make them interesting for renewable energy distribution systems. In ...