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Ara es mostren els items 48-66 de 66

    • Quasi-z-source inverter-based photovoltaic power system modeling for grid stability studies 

      Monjo Mur, Lluís; Sainz Sapera, Luis; Mesas García, Juan José; Pedra Durán, Joaquim (2021-01-19)
      Article
      Accés obert
      Quasi-Z-source inverters (qZSIs) are becoming a powerful power conversion technology in photovoltaic (PV) power systems because they allow energy power conversion in a single stage operation. However, they can cause system ...

    • Resonance-based procedure for locating failed luminaires in AGL systems 

      Vidal, Daniel; Monjo, Luis; Sainz Sapera, Luis (2018-02)
      Article
      Accés obert
      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 ...

    • Review and improvements to the measurements of the VSC impedance transfer matrix 

      Pedra Durán, Joaquim; Sainz Sapera, Luis; Monjo Mur, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2024-04)
      Article
      Accés obert
      Impedance/admittance transfer matrix characterization of voltage source converters is an important issue in frequency domain stability studies. Several approaches in the dq- and pn-frame are proposed to obtain this matrix ...

    • Stability assessment for multi-infeed grid-connected VSCs modeled in the admittance matrix form 

      Orellana Montaño, Luis Carlos; Sainz Sapera, Luis; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (2021-09-01)
      Article
      Accés obert
      The increasing use of power electronics converters to integrate renewable energy sources has been a subject of concern due to the resonance oscillatory phenomena caused by their interaction with poorly damped AC networks. ...

    • State-space model of quasi-z-source inverter-PV systems for transient dynamics studies and network stability assessment 

      Monjo Mur, Lluís; Sainz Sapera, Luis; Mesas García, Juan José; Pedra Durán, Joaquim (2021-07-09)
      Article
      Accés obert
      Photovoltaic (PV) power systems are increasingly being used as renewable power generation sources. Quasi-Z-source inverters (qZSI) are a recent, high-potential technology that can be used to integrate PV power systems into ...

    • State-space model of qZSI based PMSG-WPGSs for transient dynamic studies 

      Monjo Mur, Lluís; Sainz Sapera, Luis (2021-09)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The use of permanent magnet synchronous generators (PMSGs) with full-scale back-to-back converters is rising as a common option in wind power generation systems (WPGSs). An efficient grid integration of PMSG-WPGSs is ...

    • 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
      Accés obert
      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
      Accés restringit per política de l'editorial
      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 black-box models and participation factors for the positive-mode damping stability criterion 

      Orellana Montaño, Luis Carlos; Sainz Sapera, Luis; Prieto Araujo, Eduardo; Cheah Mañé, Marc; Mehrjerdi, Hasan; Gomis Bellmunt, Oriol (Elsevier, 2023-06-01)
      Article
      Accés obert
      The dominance of power electronics in modern power systems makes it difficult to study stability with sufficient accuracy given the available information, so it is necessary to enhance current frequency-based stability ...

    • Study of cable short circuit in VSC DC systems 

      Monjo Mur, Lluís; Mesas García, Juan José; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Study of MVDC system benchmark networks 

      Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Study of resonance in wind parks 

      Monjo Mur, Lluís; Sainz Sapera, Luis; Liang, Jun; Pedra Durán, Joaquim (2015-11-01)
      Article
      Accés obert
      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
      Accés obert
      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
      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 ...

    • Study of the steinmetz circuit influence on AC traction system resonance 

      Sainz Sapera, Luis; Monjo Mur, Lluís; Riera, Sara; Pedra Durán, Joaquim (2012-10-01)
      Article
      Accés restringit per política de l'editorial
      Traction systems are single-phase, nonlinear loads, which can unbalance and pollute supply voltages. To reduce voltage unbalance, reactances are usually connected in delta configuration with traction systems. This setup ...

    • Study of voltage sag impact on LED lamp consumed currents 

      Monjo Mur, Lluís; Mesas García, Juan José; Sainz Sapera, Luis; Pedra Durán, Joaquim (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Theoretical study of the steinmetz circuit design 

      Monjo Mur, Lluís; Sainz Sapera, Luis; Riera Galceran, Sara; Bergas Jané, Joan Gabriel (Taylor & Francis, 2013-01-11)
      Article
      Accés restringit per política de l'editorial

    • Three-port small signal admittance-based model of VSCs for studies of multi-Terminal HVDC hybrid AC/DC yransmission grids 

      Pedra Durán, Joaquim; Sainz Sapera, Luis; Monjo Mur, Lluís (2021-01-01)
      Article
      Accés obert
      Multi-terminal high voltage direct current (HVDC) systems, together with AC transmission systems and voltage source converters (VSCs), form hybrid AC/DC grids with complex dynamic and transient interactions. VSCs ...

    • Wind power plant resonances 

      Sainz Sapera, Luis; Cheah Mañé, Marc; Monjo, Luis; Liang, Jun; Gomis Bellmunt, Oriol (2016-12)
      Article
      Accés obert
      Onshore and offshore wind power plants comprising wind turbines equipped with power converters are increasing in number worldwide. Harmonic emissions in power converters distort currents and voltages, leading to power ...