Enviaments recents

  • Detection of eccentricity faults in five-phase ferrite-PM assisted synchronous reluctance machines 

    López Torres, Carlos; Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis (Multidisciplinary Digital Publishing Institute, 2017-05-31)
    Article
    Accés obert
    Air gap eccentricity faults in five-phase ferrite-assisted synchronous reluctance motors (fPMa-SynRMs) tend to distort the magnetic flux in the air gap, which in turn affects the spectral content of both the stator currents ...
  • Dancing sprites: detailed analysis of two case studies 

    Soula, Serge; Mlynarczyk, Janusz; Fullekrug, Martin; Pineda Rüegg, Nicolau; Georgis, J.-F.; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fabró Tàpia, Ferran (2017-03-27)
    Article
    Accés obert
    On 29–30 October 2013, a low-light video camera installed at Pic du Midi (2877¿m), recorded transient luminous events above a very active storm over the Mediterranean Sea. The minimum cloud top temperature reached -73°C, ...
  • A new approach for flux and rotor resistance estimation of induction motors 

    Bazylev, Dmitry; Dòria Cerezo, Arnau; Pyrkin, Anton A.; Bobstov, Alexey A.; Ortega, Romeo (2017-07-01)
    Article
    Accés restringit per política de l'editorial
    In this paper we address the problems of flux and rotor resistance estimation of induction motors. We propose a radically new approach that combines the recently introduced techniques of parameter estimation based observers ...
  • Aliasing of the Schumann resonance background signal by sprite-associated Q-bursts 

    Guha, Anirban; Williams, Earle R.; Boldi, Robert; Satori, Gabriella; Nagy, Tamás; Bór, József; Montañá Puig, Juan; Ortega, Pascal (2017-12)
    Article
    Accés restringit per política de l'editorial
    The Earth's naturally occurring Schumann resonances (SR) are composed of a quasi-continuous background component and a larger-amplitude, short-duration transient component, otherwise called ‘Q-burst’ (Ogawa et al., 1967). ...
  • Criterion for the electrical resonance stability of offshore wind power plants connected through HVDC links 

    Cheah Mañé, Marc; Sainz Sapera, Luis; Liang, Jun; Jenkins, Nicholas; Ugalde Loo, Carlos E. (2017-11-01)
    Article
    Accés obert
    Electrical resonances may compromise the stability of HVDC-connected offshore wind power plants (OWPPs). In particular, an offshore HVDC converter can reduce the damping of an OWPP at low-frequency series resonances, leading ...
  • Load identification of different Halbach-array topologies on permanent magnet synchronous generators using the coupled field-circuit FE methodology 

    Asef, Pedram; Bargalló Perpiñá, Ramón; Barzegaran, M.R.; lapthorn, andrew; Mewes, Daniela (2018-01-01)
    Article
    Accés obert
    In this paper, the influence of gap consideration on load identification under various Halbach-array-based topologies (HABOs) is investigated while the system is on-duty. The load characteristics of a radial flux generator ...
  • A family of gradient descent grid frequency estimators for the SOGI filter 

    Matas Alcalá, José; Martín Cañadas, María Elena; Hoz Casas, Jordi de la; Abusorrah, A.; Al-Turki, Y.A.; Al-Hindawi, M. (2017-09-04)
    Article
    Accés restringit per política de l'editorial
    This paper applies the adaptive gradient descent method to the second-order generalized integrator (SOGI) filter in order to find an online estimation algorithm for the grid frequency, which leads to the proposal of three ...
  • Design and optimization for vehicle driving cycle of rare-earth-free SynRM based on coupled lumped thermal and magnetic networks 

    López Torres, Carlos; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2017-08-11)
    Article
    Accés restringit per política de l'editorial
    This work presents a range optimization of a SynRM (synchronous reluctance motor) and a PMaSynRM (permanent-magnet-assisted synchronous reluctance motor) according to a standard driving cycle, and the solutions obtained ...
  • Series interline DC/DC current flow controller for meshed HVDC grids 

    Sau Bassols, Joan; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol; Hassan, Fainan (2017-07-30)
    Article
    Accés restringit per política de l'editorial
    This paper proposes a DC/DC Current Flow Controller (CFC) for meshed High Voltage Direct Current (HVDC) grids. The CFC has the advantage of a simplified structure that allows to use minimum number of switches when ...
  • Regenerative braking in electric scooters 

    Montesinos Miracle, Daniel; Ruiz Bassols, Toni (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Electric urban vehicles are in the spotlight of society since its autonomy dependence is not that high. Electric motorcycles and scooters are actually already reliable urban vehicles for short journeys. These vehicles can ...
  • Handling of unbalanced faults in HVDC-connected wind power plants 

    Schönleber, Kevin; Prieto Araujo, Eduardo; Ratés Palau, Sergi; Gomis Bellmunt, Oriol (2017-11)
    Article
    Accés obert
    High-voltage DC (HVDC) connections enable integration of wind power plants located very far from shore. The decoupled AC offshore grid comprises multiple WT converters, and the voltage magnitude and frequency is primarily ...
  • Modulation techniques applied to medium voltage modular multilevel converters for renewable energy integration: A review 

    Antonio Ferreira, Abel; Gomis Bellmunt, Oriol; Collados Rodríguez, Carlos (2018-02-01)
    Article
    Accés restringit per política de l'editorial
    Modular multilevel converters (MMC) inherent features are gaining more attention for dc voltage transmission systems. One of the main research paths regarding the converter performance deals with its voltage modulation. ...

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