Now showing items 21-40 of 44

  • Low-watt compact fluorescent lamps with electronic ballasts 

    Cunill Solà, Jordi; Mesas García, Juan José; Sainz Sapera, Luis (Universidad de Málaga, 2011)
    Conference report
    Restricted access - publisher's policy
  • Modeling harmonics of networks supplying nonlinear loads 

    Lamich Arocas, Manuel; Balcells Sendra, Josep; Corbalán Fuertes, Montserrat; Sainz Sapera, Luis; Fernandez, Cristian (2014)
    Conference report
    Restricted access - publisher's policy
    This work presents the development and validation of a model for electric networks supplying nonlinear loads (NLL). The model is based on Neural Networks (NN) and its purpose is the prediction of harmonic currents sank by ...
  • 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 magnetic ballast 

    Molina, Julio; Sainz Sapera, Luis; Mesas García, Juan José; Bergas Jané, Joan Gabriel (2013-02)
    Article
    Restricted access - publisher's policy
    Magnetic ballast discharge lamp modeling has been extensively studied because these lamps can be an important source of harmonics. Discharge lamp models usually represent the arc voltage by a square waveform. However, this ...
  • 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 ...
  • Model of electronic ballast compact fluorescent lamps 

    Molina, Julio; Sainz Sapera, Luis (2014-06-01)
    Article
    Restricted access - publisher's policy
    The use of compact fluorescent lamps (CFLs) in utility distribution systems is spreading due to energy consumption concerns. This can damage system power quality because CFLs are nonlinear harmonic injecting loads. For ...
  • Neutral conductor current in three-phase networks with compact fluorescent lamps 

    Cunill Solà, Jordi; Sainz Sapera, Luis; Mesas García, Juan José (2013-10)
    Article
    Open Access
    In this paper, expressions of the neutral conductor current in three-phase networks with compact fluorescent lamps (CFLs) are obtained from a CFL “black-box” model proposed in the literature. These expressions allow studying ...
  • On electric vehicle battery charger modeling 

    Sainz Sapera, Luis; Mesas García, Juan José; Balcells Sendra, Josep (2011)
    Conference lecture
    Open Access
    The increase of electric vehicle (EV) battery chargers connected to electric networks could lead to future harmonic problems in power systems. These loads are nonlinear devices that inject harmonic currents and pollute ...
  • On the square arc voltage waveform model in magnetic discharge lamp studies 

    Molina, Julio; Sainz Sapera, Luis; Mesas García, Juan José (2011)
    Conference lecture
    Restricted access - publisher's policy
    The current number of magnetic and electronic ballast discharge lamps in power distribution systems is increasing because they perform better than incandescent lamps. This paper studies the magnetic discharge lamp ...
  • Parameter estimation procedures for compact fluorescent lamps with electronic ballasts 

    Sainz Sapera, Luis; Cunill Solà, Jordi; Mesas García, Juan José (2013-02)
    Article
    Restricted access - publisher's policy
  • Positive-net-damping stability criterion in grid-connected VSC systems 

    Sainz Sapera, Luis; Cheah Mañé, Marc; Monjo, Luis; Liang, Jun; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2017-12-01)
    Article
    Open Access
    Resonance instabilities in power systems can be assessed with the positive-net-damping stability criterion. This criterion is a review of the complex torque coefficients method, but it does not provide the frequency of the ...
  • PSpice model of discharge lamps with saturated magnetic ballast and non-square arc voltage 

    Molina, Julio; Sainz Sapera, Luis (2014-09-01)
    Article
    Restricted access - publisher's policy
    High intensity discharge lamps with magnetic ballast are energy-efficient lighting devices commonly used in industrial and public installations. These lamps can be important pollution loads, and their harmonic modeling has ...
  • Resonance-based procedure for locating failed luminaires in AGL systems 

    Vidal, Daniel; Monjo, Luis; Sainz Sapera, Luis (2018-02)
    Article
    Open Access
    IEEE Aeronautical ground lighting (AGL) systems provide a visual reference for aircraft during airport operations. Fast detection and location of failed luminaires is an important safety concern in AGL systems. In the event ...
  • Statistical study of personal computer cluster harmonic currents from experimental measurements 

    Mesas García, Juan José; Sainz Sapera, Luis; Sala Pérez, Pau (2015-01-02)
    Article
    Open Access
    The net harmonic currents generated by a cluster of desktop personal computers are studied statistically. Personal computers (PCs) are single-phase non-linear loads with low individual consumption but significant collective ...
  • 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
  • Study of MVDC system benchmark networks 

    Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
    Conference report
    Restricted access - publisher's policy
  • Study of resonance in wind parks 

    Monjo Mur, Lluís; Sainz Sapera, Luis; Liang, Jun; Pedra Durán, Joaquim (2015-11-01)
    Article
    Open Access
    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 ...
  • Study of resonances in 1 x 25 kV AC traction systems 

    Monjo Mur, Lluís; Sainz Sapera, Luis (2015-09-14)
    Article
    Open Access
    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 ...
  • 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
    Open Access
    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 ...