Now showing items 1-20 of 29

  • Aeronautical ground lighting system study: field measurements and simulations 

    Vidal, Daniel; Monjo Mur, Lluís; Sainz Sapera, Luis (2016-10-06)
    Article
    Open Access
    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. ...
  • Aportacions a la modelització de la màquina d'inducció de gàbia d'esquirol 

    Monjo Mur, Lluís (Universitat Politècnica de Catalunya, 2013-07-27)
    Doctoral thesis
    Open Access
    En aquesta tesi es tracten en profunditat diversos aspectes sobre la modelització de la màquina d’inducció de gàbia d’esquirol. En el primer capítol, a partir dels paràmetres i de les característiques elèctriques i ...
  • A unified analytical model for characterization of cable faults in VSC DC systems 

    Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
    Conference report
    Open Access
  • Cable fault characterization in VSC DC systems 

    Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2016)
    Conference lecture
    Restricted access - publisher's policy
  • Comparison of simplified models for voltage-source-inverter-fed adjustable-speed drive during voltage sags when the during-event continue mode of operation is active 

    Bogarra Rodríguez, Santiago; Monjo Mur, Lluís; Saura Perisé, Jaime; Córcoles López, Felipe; Pedra Durán, Joaquim (2014-11-13)
    Article
    Restricted access - publisher's policy
    Three simplified models for adjustable-speed drives are compared with measurements on an actual drive where the inverter control strategy remains unaltered during the event (also known as continue mode of operation) to ...
  • Disseny d’un generador eòlic de petita potència 

    Monjo Mur, Lluís (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2009-06)
    Master thesis
    Open Access
    En l’actualitat l’energia eòlica està assolint un protagonisme molt important en termes de grans parc de molt alta potència per generador. Tanmateix, un segment encara poc desenvolupat però amb símptomes d’un gran creixement ...
  • Effect of wind turbine converter control on wind power plant harmonic response and resonances 

    Sainz Sapera, Luis; Monjo Mur, Lluís; Pedra Durán, Joaquim; Cheah Mañé, Marc; Liang, Jun; Gomis Bellmunt, Oriol (2017-02-01)
    Article
    Restricted access - publisher's policy
    Wind turbine harmonic emissions due to power electronics are a well-known power quality concern in wind power plants (WPPs). This problem may be increased by resonances because they amplify harmonic distortion around ...
  • Electrical resonance instability study in traction systems 

    Sainz Sapera, Luis; Monjo Mur, Lluís; Mesas García, Juan José; Pedra Durán, Joaquim; Cheah Mañé, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    Traction system stability can be affected by the interaction between the traction load and resonances in the railway traction grid. This paper presents an electrical resonance instability study applied to traction systems. ...
  • Electrical resonance instability study in wind power plants 

    Sainz Sapera, Luis; Mesas García, Juan José; Monjo Mur, Lluís; Pedra Durán, Joaquim; Cheah Mañé, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    Wind power plant stability can be affected by the interaction between the wind turbine and the resonances in the collector grid. This paper presents an electrical resonance instability study applied to wind power plants. The ...
  • Harmonic resonance stability of aeronautical ground lighting systems 

    Vidal, Daniel; Monjo Mur, Lluís; Sainz Sapera, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2018-12)
    Article
    Restricted access - publisher's policy
    Aeronautical ground lighting (AGL) systems assist aircraft pilots in airport operations. These systems are singlephase series circuits where constant current regulators (CCRs) feed luminaires with an adjustable rms current. ...
  • Impact of voltage sags on DC bus voltage in unipolar LVDC systems 

    Monjo Mur, Lluís; Mesas García, Juan José; Sainz Sapera, Luis; Saura Perisé, Jaime; Pedra Durán, Joaquim (2015)
    Conference report
    Open Access
  • Model of aeronautical ground lighting system transformers 

    lomvarte, daniel; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015-03-02)
    Article
    Open Access
    Airport ground lighting (AGL) systems provide visual reference to aircrafts during airport operations. In AGL systems, constant current regulators feed a beacon circuit supplied through isolation transformers. Component ...
  • Model of discharge lamps with saturated magnetic ballast and non-square arc voltage 

    Molina, Julio; Sainz Sapera, Luis; Monjo Mur, Lluís (2013-11-01)
    Article
    Restricted access - publisher's policy
    Harmonic modeling of high intensity discharge lamps with magnetic ballast has been extensively studied because they are energy-efficient lighting devices commonly used in industrial and public installations, and can be ...
  • On fixed-speed WT generator modeling for rotor speed stability studies 

    Pedra Durán, Joaquim; Córcoles López, Felipe; Monjo Mur, Lluís; Bogarra Rodríguez, Santiago; Rolán Blanco, Alejandro (2012-01-20)
    Article
    Restricted access - publisher's policy
    This paper analyzes fixed-speed induction generator modeling oriented to rotor speed stability studies. The single- and double-cage models are compared. The effects of symmetrical voltage sags on generator behavior are ...
  • Parameter estimation of squirrel-cage motors with parasitic torques in the torque–slip curve 

    Monjo Mur, Lluís; Córcoles López, Felipe; Pedra Durán, Joaquim (2015-04-16)
    Article
    Open Access
    This paper studies parasitic torques in steady-state torque–slip curves of squirrel-cage induction motors. The curves of nine motors (small, medium and large size units), three of which were measured in the range s = 2 ...
  • Parameter estimation of wound-rotor induction motors from transient measurements 

    Kojooyan, Hengameh; Monjo Mur, Lluís; Córcoles López, Felipe; Pedra Durán, Joaquim (2014-06)
    Article
    Restricted access - publisher's policy
    A new method for determination of the steady-state equivalent circuit parameters of wound-rotor induction motors using experimental data from starting transient measurements is presented. The algorithm data are the stator ...
  • Saturation effects on torque- and current–slip curves of squirrel-cage induction motors 

    Monjo Mur, Lluís; Córcoles López, Felipe; Pedra Durán, Joaquim (2012-12-24)
    Article
    Restricted access - publisher's policy
    This paper measures and analyzes the saturation effects on torque- and current–slip curves of three squirrel-cage induction motors.Motor saturation is illustrated by three sets of measurements: I) torque and current for ...
  • Squirrel-cage induction motor parameter estimation using a variable frequency test 

    Monjo Mur, Lluís; Kojooyan, Hengameh; Córcoles López, Felipe; Pedra Durán, Joaquim (2015-06-01)
    Article
    Open Access
    This paper presents amethod for squirrel-cage induction motor parameter estimation using a phase-to-phase standstill variable frequency test. The measured resistance and reactance at different frequencies are the data of ...
  • Statistical study of resonance in AC traction systems equipped with Steinmetz circuit 

    Monjo Mur, Lluís; Sainz Sapera, Luis; Rull Duran, Joan (2013-10)
    Article
    Restricted access - publisher's policy
    AC traction systems can be 25 kV/50 Hz single-phase, non-linear, time-varying loads of random naturecausing unbalance and distortion of the supply voltages. To reduce voltage unbalance, thyristor controlledreactances are ...
  • Study of cable short circuit in VSC DC systems 

    Monjo Mur, Lluís; Mesas García, Juan José; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
    Conference report
    Restricted access - publisher's policy