Recent Submissions

  • Surface tension prediction of vegetable oils using artificial neural networks and multiple linear regression 

    Melo-Espinosa, Eliezer Ahmed; Sánchez-Borroto, Yisel; Errasti, Michel; Piloto-Rodríguez, Ramón; Sierens, Roger; Riba Ruiz, Jordi-Roger; Christopher-Hansen, Alan (2014-10-10)
    Article
    Open Access
  • Hybrid reluctance machines with U-shaped electromagnets and permanent magnets 

    Andrada Gascón, Pedro; Blanqué Molina, Balduino; Martínez Piera, Eusebio; Torrent Burgués, Marcel; Rolando Ávila, Oscar; Gomila, Marc; Adelantado, Xavier (2015-03-01)
    Article
    Open Access
    This paper is about hybrid reluctance machines, in which the stator or fixed part has a combination of U-shaped electromagnets with permanents magnets placedbetween their arms while the moving part is simply a structure ...
  • Lessons learned in the use of WIRIS quizzes to upgrade Moodle to solve electrical circuits 

    Bogarra Rodríguez, Santiago; Corbalán Fuertes, Montserrat; Font Piera, Antonio; Plaza, Inma; Arcega Solsona, Francisco Javier (2012-01-16)
    Article
    Open Access
    WIRIS quizzes is an online mathematics tool for educational purposes that upgrades Moodle quizzes, and allows the development of personalized quizzes using random data and conditional instructions. WIRIS quizzes can be ...
  • Protection of AC and DC distribution systems. Embedding distributed energy resources: a comparative review and analysis 

    Monadi, Mehdi; Zamani, M. Amin; Candela García, José Ignacio; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2015-11-01)
    Article
    Restricted access - publisher's policy
    The integration of distributed generation (DG) units into distribution networks has challenged the operating principles of traditional AC distribution systems, and also motivated the development of emerging DC systems. Of ...
  • Decentralized control of a nine-phase permanent magnet generator for offshore wind turbines 

    Prieto Araujo, Eduardo; Junyent Ferré, Adrià; Lavemia Ferrer, David; Gomis Bellmunt, Oriol (2015-09-01)
    Article
    Open Access
    This paper presents a decentralized current control approach for a nine-phase wind turbine generator. This type of generator has three different three-phase stators sharing the same machine yoke and connected to the grid ...
  • Renewable energy emulation concepts for microgrids 

    Prieto Araujo, Eduardo; Olivella Rosell, Pol; Cheah Mañé, Marc; Villafafila Robles, Roberto; Gomis Bellmunt, Oriol (2015-10-01)
    Article
    Open Access
    This paper reviews the renewable energy systems emulators proposals for microgrid laboratory testing platforms. Four emulation conceptual levels are identified based on the literature analysis performed. Each of these ...
  • La conmutación del inversor trifásico, estrategia y comprensión 

    Llonch Masachs, Marc; Montesinos Miracle, Daniel (Grupo Tecnipublicaciones, 2015-06-01)
    Article
    Restricted access - publisher's policy
    Los inversores trifásicos llevan ya décadas presentes en la industria. La necesidad de sintetizar tensiones trifásicas sinusoidales desde un bus de continua, está presente tanto en la alimentación de cargas como en la ...
  • Study of resonances in 1 x 25 kV AC traction systems 

    Monjo Mur, Lluís; Sainz Sapera, Luis (2015-09-14)
    Article
    Restricted access - publisher's policy
    AC traction systems are 1 x 25 or 2 x 25 kV 50-Hz single-phase, non-linear, time-varying loads that can cause power quality problems. One of the main concerns about these systems is voltage distortion, because adjustable-speed ...
  • Using the instantaneous power of a free acceleration test for squirrel-cage motor parameters estimation 

    Kojooyan, Hengameh; Monjo Mur, Lluís; Córcoles López, Felipe; Pedra Durán, Joaquim (2015-09-01)
    Article
    Open Access
    A new parameters determination method for squirrel-cage induction motors is presented. As a main contribution, the method uses the instantaneous electrical power and the mechanical speed measured in a free acceleration ...
  • Study of resonance in wind parks 

    Monjo Mur, Lluís; Sainz Sapera, Luis; Liang, Jun; Pedra Durán, Joaquim (2015-11-01)
    Article
    Restricted access - publisher's policy
    Wind turbine harmonic current emissions are a well-known power quality problem. These emissions flow through wind park impedances, leading to grid voltage distortion. Parallel resonance may worsen the problem because it ...

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