Now showing items 1-11 of 11

    • Active power limiter for static synchronous generators in renewable applications 

      Abdollahi, Mostafa; Candela García, José Ignacio; Rocabert Delgado, Joan; Atef Abbas Elsaharty, Mohamed (Institute of Electrical and Electronics Engineers (IEEE), 2020-08-28)
      Article
      Open Access
      Virtual Synchronous Generators (VSGs) are an interesting control approach for the connection of renewable energies to the electrical grid through power converters. These power devices have shown their ability to enable ...
    • Custom power active transformer for flexible operation of power systems 

      Atef Abbas Elsaharty, Mohamed; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2017-08-15)
      Article
      Open Access
      IEEE This paper presents a new transformer, i.e., the Custom Power Active Transformer (CPAT) which integrates both series and shunt power conditioning through power electronics in a single transformer. This is achieved ...
    • Electromechanical design of synchronous power controller in grid integration of renewable power converters to support dynamic stability 

      Abdollahi, Mostafa; Candela García, José Ignacio; Tarraso Martínez, Andrés; Atef Abbas Elsaharty, Mohamed; Rakhshani, Elyas (2021-04-10)
      Article
      Open Access
      Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since ...
    • Equivalent model of a synchronous PV power plant 

      Remón, D.; Mir Cantarellas, Antonio; Atef Abbas Elsaharty, Mohamed; Koch-Ciobotaru, Cosmin; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      The continuous integration of renewable energy sources into power systems has led to the construction of large power plants based on power electronics, with power ratings up to hundreds of megawatts, in order to accomodate ...
    • Heuristic optimization of supplementary controller for VSC-HVDC/AC interconnected grids considering PLL 

      Rakhshani, Elyas; Rouzbehi, Kumars; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (Taylor & Francis, 2017-01-01)
      Article
      Open Access
      This paper presents a new approach to enhance the dynamic responses of AGC in power systems by means of heuristic optimization of VSC-HVDC supplementary controllers. The upcoming power electronics-based VSC-HVDC transmission ...
    • 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, ...
    • 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 ...
    • Novel analytical method for dynamic design of renewable SSG SPC unit to mitigate low-frequency electromechanical oscillations 

      Abdollahi, Mostafa; Candela García, José Ignacio; Rocabert Delgado, Joan; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2019-11-28)
      Article
      Open Access
      Grid operators require grid connected RGUs to provide specific dynamic features. RGUs must support dynamic performance of grid and operate in such a way to ward off new issues in grid. Recently, unfavorable oscillatory ...
    • Power system compensation using a power electronics integrated transformer 

      Atef Abbas Elsaharty, Mohamed; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2017-09-22)
      Article
      Open Access
      This paper presents a new transformer, i.e., the Custom Power Active Transformer (CPAT) - which integrates shunt and series equivalent circuits within the transformer's magnetic structure. Thus, it provides power system ...
    • Synchronous PV support to an isolated power system 

      Remón, D.; Mir Cantarellas, Antonio; Atef Abbas Elsaharty, Mohamed; Koch-Ciobotaru, Cosmin; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      The increase of renewable energy sources and distributed generation may have a negative impact on power systems, specially on weak ones. Therefore, their control systems are acquiring growing importance, with new proposals ...
    • Three-phase custom power active transformer for power flow control applications 

      Atef Abbas Elsaharty, Mohamed; Rocabert Delgado, Joan; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2018-06-08)
      Article
      Open Access