Now showing items 1-7 of 7

    • Connection and disconnection transients for micro-grids under unbalance load condition 

      Rocabert Delgado, Joan; Azevedo, Gustavo M.S.; Candela García, José Ignacio; Luna Alloza, Álvaro; Blaabjerg, Frede; Rodríguez Cortés, Pedro (2014-03)
      Article
      Restricted access - publisher's policy
      In this paper the design and the implementation of a method oriented to carry out a safe and a stable intentional disconnection, and re-connection, of local micro-grids from the main distribution network under generic grid ...
    • Connection and disconnection transients for micro-grids under unbalance load condition 

      Rocabert Delgado, Joan; Azevedo, Gustavo M.S.; Candela García, José Ignacio; Blaabjerg, Frede; Rodríguez Cortés, Pedro (2011)
      Conference report
      Restricted access - publisher's policy
      The recent grid integration of Distributed Energy Resources (DER) possibility the formation of intentional islands in the case of a grid fault conditions. For such island formation is required an active agent capable of ...
    • Enhanced power calculator for droop control in single-phase systems 

      Azevedo, Gustavo M.S.; Calvancanti, M; Bradaschia, F.; Neves, F.; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro (IEEE, 2011)
      Conference report
      Restricted access - publisher's policy
      Droop control is a common method to parallel operation of inverters. This method uses the average values of power components which are usually obtained through low-pass filters. However, in single-phase systems the power ...
    • 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 ...
    • Performance improvement of the droop control for single-phase inverters 

      Azevedo, Gustavo M.S.; Calvancanti, M; Neves, F.; Rodríguez Cortés, Pedro; Rocabert Delgado, Joan (2011)
      Conference report
      Restricted access - publisher's policy
      The droop control uses the local average values of the active and reactive power components for sharing the load power demand among inverters in parallel. In this paper, a method that uses a virtual quadrature reference ...
    • Photovoltaic inverters with fault ride-through capability 

      Azevedo, Gustavo M.S.; Vázquez, Gerardo; Luna Alloza, Álvaro; Aguilar Galván, Daniel; Rolán Blanco, Alejandro (ISIE, 2009)
      Conference lecture
      Open Access
      This paper presents a new control strategy that allow the photovoltaic system operate under grid faults without overpass the rated current and assuring sinusoidal currents. In the classic control strategies used in ...
    • Safe transient operation of microgrids based on master-slave configuration 

      Azevedo, Gustavo M.S.; Bradaschia, F.; Calvancanti, M; Neves, F.; Rodríguez Cortés, Pedro; Rocabert Delgado, Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Conference report
      Restricted access - publisher's policy
      Master-Slave configuration is a suitable alternative to droop control method used in microgrids. In this configuration, only one inverter is the master, while the others are slaves. The slave inverters are always current ...