Enviaments recents

  • Study of resonances in 1 x 25 kV AC traction systems with external balancing equipment 

    Mesbahi, Nadhir; Monjo Mur, Lluís; Sainz Sapera, Luis (2016-10-01)
    Article
    Accés obert
    AC traction systems are 1 × 25 or 2 × 25 kV/50 Hz single-phase, nonlinear, time-varying loads that can cause power-quality problems, such as unbalanced or distorted voltages. To reduce unbalance, external balancing equipment ...
  • Centralized protection strategy for medium voltage DC microgrids 

    Monadi, Mehdi; Gavriluta, Catalin; Luna Alloza, Álvaro; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2016-08-15)
    Article
    Accés obert
    This paper presents a centralized protection strategy for medium voltage dc (MVDC) microgrids. The proposed strategy consists of a communication-assisted fault detection method with a centralized protection coordinator and ...
  • Aeronautical ground lighting system study: field measurements and simulations 

    Vidal, Daniel; Monjo Mur, Lluís; Sainz Sapera, Luis (2016-10-06)
    Article
    Accés obert
    Aeronautical ground lighting (AGL) systems are single-phase series circuits where constant current regulators supply transformers and luminaires. These systems provide visual reference to aircraft during airport operations. ...
  • A communication-assisted protection scheme for direct-current distribution networks 

    Monadi, Mehdi; Zamani, M. Amin; Koch-Ciobotaru, Cosmin; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2016-05-27)
    Article
    Accés restringit per política de l'editorial
    One of the major issues associated with the implementation of direct-current distribution systems is the design of a proper protection scheme. The fault current characteristics in direct-current distribution systems are ...
  • Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters 

    Suul, Jon Are; D'Arco, Salvatore; Rodríguez Cortés, Pedro; Molinas Cabrera, Marta (2016-05-12)
    Article
    Accés obert
    This paper demonstrates how the range of stable power transfer in weak grids with voltage source converters (VSCs) can be extended by modifying the grid synchronisation mechanism of a conventional synchronous reference ...
  • Sizing study of second life li-ion batteries for enhancing renewable energy grid integration 

    Saez-de Ibarra, Andoni; Martinez-Laserna, Egoitz; Stroe, Daniel-loan; Swierczynski, Maciej; Rodríguez Cortés, Pedro (2016-07-19)
    Article
    Accés obert
    Renewable power plants must comply with certain codes and requirements to be connected to the grid, being the ramp-rate compliance one of the most challenging requirements, especially for photovoltaic or wind energy ...
  • Multi-terminal HVDC grids with inertia mimicry capability 

    Zhang, Weiyi; Rouzbehi, Kumars; Luna Alloza, Álvaro; Gharehpetian, Gevorg B.; Rodríguez Cortés, Pedro (2016-06-23)
    Article
    Accés obert
    The high-voltage multi-terminal dc (MTDC) systems are foreseen to experience an important development in the next years. Currently, they have appeared to be a prevailing technical and economical solution for harvesting ...
  • Flexible control of power flow in multiterminal DC grids using DC-DC converter 

    Rouzbehi, Kumars; Candela García, José Ignacio; Luna Alloza, Álvaro; Gharehpetian, Gevorg B.; López Rodríguez, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2016-09-01)
    Article
    Accés obert
    This paper proposes an efficient control framework that utilizes dc-dc converters to achieve flexible power flow control in multiterminal dc (MTDC) grids. The dc-dc converter employed in this paper is connected in cascade ...
  • An educational tool to assist the design process of switched reluctance machines 

    Riba Ruiz, Jordi-Roger; Romero, Itamar; García Espinosa, Antonio (2016-07-13)
    Article
    Accés obert
    The design of electric machines is a hot topic in the syllabuses of several undergraduate and graduate courses. With the development of hybrid and electrical vehicles, this subject is gaining more popularity, especially ...
  • Combined heat and power design based on environmental and cost criteria 

    González, Arnau; Riba Ruiz, Jordi-Roger; Rius Carrasco, Antoni (2016-10-22)
    Article
    Accés restringit per política de l'editorial
    This paper proposes a hybrid renewable energy system (HRES) consisting of photovoltaic (PV), wind and forest wood biomass power for cogeneration, and applies a multi-objective optimization methodology to study the trade-offs ...

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