Exploració per autor "Pedra Durán, Joaquim"
Ara es mostren els items 16-35 de 38
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Impact of short-circuit ratio on control parameter settings of DFIG wind turbines
Pedra Durán, Joaquim; Sainz Sapera, Luis; Monjo Mur, Lluís (2024-04-11)
Article
Accés obertThis work deals with doubly fed induction generator (DFIG) modeling and stability when connected to weak AC grids. A detailed state-space model that includes the phase-locked loop (PLL) is developed. This work aims to ... -
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)
Text en actes de congrés
Accés obert -
Initialization of DFIG wind turbines with a phasor-based approach
Rolán Blanco, Alejandro; Pedra Durán, Joaquim (2019-03)
Article
Accés obertThe objective of this paper is to propose a simple approach to solve the steady state of a wind turbine (WT) equipped with a doubly-fed induction generator (DFIG) which can be used to initialize dynamic studies of the ... -
Model of aeronautical ground lighting system transformers
lomvarte, daniel; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015-03-02)
Article
Accés obertAirport 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 quasi-Z-source inverter-based PV power systems for stability studies of multi-terminal AC grid-connected PV power systems
Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (Elsevier, 2024-01)
Article
Accés obertPhotovoltaic (PV) power systems are becoming one of the most popular green power systems. Power converters are used in these systems. Among them, quasi-Z-source inverters (qZSIs) are currently on the rise. However, ... -
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 (2012-02)
Article
Accés restringit per política de l'editorialThis 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
Accés obertThis 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
Accés restringit per política de l'editorialA 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 ... -
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 obertQuasi-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 ... -
Reduced-order models of squirrel-cage induction generators for fixed-speed wind turbines under unbalanced grid conditions
Rolán Blanco, Alejandro; Córcoles López, Felipe; Bogarra Rodríguez, Santiago; Monjo Mur, Lluís; Pedra Durán, Joaquim (2016-06)
Article
Accés obertThis paper develops a study of reduced-order models for squirrel-cage induction generators used in the fixed-speed wind turbines. The squirrel-cage of these generators must be modeled with a double-cage for accuracy purposes. ... -
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 obertImpedance/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 ... -
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
Accés restringit per política de l'editorialThis 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 ... -
Small synchronous machine protection during voltage sags caused by MV grid faults
Bogarra Rodríguez, Santiago; Rubion, X.; Rolán Blanco, Alejandro; Córcoles López, Felipe; Pedra Durán, Joaquim; Iglesias, J. (2018-03-01)
Article
Accés obertThis paper analyses the impact of symmetrical and unsymmetrical voltage sags caused by distribution and transmission faults on the dynamic behaviour of small salient-pole synchronous machines connected to the MV grid, and ... -
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
Accés obertThis 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 ... -
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 obertPhotovoltaic (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 ... -
Study of cable short circuit in VSC DC systems
Monjo Mur, Lluís; Mesas García, Juan José; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
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Study of MVDC system benchmark networks
Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
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Study of resonance in wind parks
Monjo Mur, Lluís; Sainz Sapera, Luis; Liang, Jun; Pedra Durán, Joaquim (2015-11-01)
Article
Accés obertWind 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 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'editorialTraction 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