Now showing items 1-20 of 31

    • A survey and evaluation of the potentials of distributed ledger technology for peer-to-peer transactive energy exchanges in local energy markets 

      Siano, Pierluigi; De Marco, Giuseppe; Rolán Blanco, Alejandro; Loia, Vincenzo (2019-09)
      Article
      Restricted access - publisher's policy
      Theunpredictability and intermittency introduced by Renewable Energy Sources (RESs) in power systems may lead to unforeseen peaks of energy production, which might differ from energy demand. To manage these mismatches, a ...
    • An approach to the performance-oriented model of variable-speed wind turbines 

      Rolán Blanco, Alejandro; Luna Alloza, Álvaro; Rocabert Delgado, Joan; Aguilar Galván, Daniel; Vázquez Guzmán, Gerardo (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Conference lecture
      Open Access
      The aim of this work is to give an approach to the Performance-Oriented Model of Variable-Speed Wind turbines (VSWTs) equipped with permanent magnet synchronous generator (PMSG), and compare it to the component-oriented model. ...
    • Analysis of the performance of MMC under fault conditions in HVDC-based off-shore wind farms 

      Vidal-Albalate, Ricardo; Beltran, Héctor; Rolán Blanco, Alejandro; Belenguer Balaguer, Enrique Francisco; Peña, Rubén; Blasco-Giménez, Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2016-04)
      Article
      Open Access
      This paper analyzes the behavior of a modular multilevel converter-high-voltage direct-current (MMC HVDC)-connected offshore wind power plant (WPP) during dc faults. For that purpose, detailed models of the dc cable, MMC ...
    • Behavior of the three-phase induction motor with spiral sheet rotor 

      Mujal-Rosas, Ramon Maria; Boix Aragonès, Oriol; Colom Fajula, Xavier; Rolán Blanco, Alejandro (2009-03)
      Article
      Open Access
      Improvements in torque at low currents using a rotor with spiral sheets are analyzed. Several rotors and stators have been built combining different constructive and mechanical characteristics of the related elements: ...
    • Behaviour of the doubly fed induction generator exposed to unsymmetrical voltage sags 

      Rolán Blanco, Alejandro; Córcoles López, Felipe; Pedra Durán, Joaquim (2012-09)
      Article
      Restricted access - publisher's policy
      This study analyses the dynamic behaviour of the doubly fed induction generator exposed to unsymmetrical voltage sags, providing insights into wind turbine fault ride-through capability. The sags are assumed to be caused ...
    • Control strategies for DFIG wind turbines under grid fault conditions 

      Luna Alloza, Álvaro; Rolán Blanco, Alejandro; Medeiros, G.; Rodríguez Cortés, Pedro; Teodorescu, R. (2009)
      Conference lecture
      Open Access
      The classical control techniques for regulating the active and reactive power delivery in doubly fed induction generators (DFIG), for wind power applications, are normally based on voltage oriented control (VOC) strategies. ...
    • Desenvolupament de recursos per a la creació i gestio de material docent orientat a l’aprenentatge actiu que faciliti l’adaptació d’assignatures tècniques a l’EEES i la seva aplicació a l’ensenyament de circuits elèctrics 

      Bogarra Rodríguez, Santiago; Font Piera, Antonio; Alabern Morera, Francesc Xavier; Rodríguez Cortés, Pedro; Grau Gotés, Maria Àngela; Pallarés Viña, Miguel Juan; Rocabert Delgado, Joan; Rolán Blanco, Alejandro; García Espinosa, Antonio (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-06-04)
      Conference lecture
      Open Access
      L'autoaprenentatge i l’autoavaluació d’assignatures tècniques requereixen eines de càlcul que no estan disponibles dintre del campus virtual ATENEA, per aquest motiu s’ha incorporat al campus virtual de la UPC el software ...
    • Desenvolupament de recursos per a la creació i gestió de material docent orientat a l’aprenentatge actiu que faciliti l’adaptació d’assignatures tècniques a l'EEES i la seva aplicació a l’ensenyament de circuits elèctrics 

      Bogarra Rodríguez, Santiago; Font Piera, Antonio; Alabern Morera, Francesc Xavier; Rodríguez Cortés, Pedro; Grau Gotés, Maria Àngela; Pallarés Viña, Miguel Juan; Rocabert Delgado, Joan; Rolán Blanco, Alejandro; García Espinosa, Antonio; Marsó Riera, Arnau; Jaime Salillas, Francisco; Tarrés Soler, Mireia (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-02-11)
      Conference lecture / Conference report
      Open Access
      L'autoaprenentatge i l’autoavaluació d’assignatures tècniques requereixen eines de càlcul que no estan disponibles dintre del campus virtual ATENEA, per aquest motiu s’ha incorporat al campus virtual de la UPC el software ...
    • Detailed study of DFIG-based wind turbines to overcome the most severe grid faults 

      Rolán Blanco, Alejandro; Pedra Durán, Joaquim; Córcoles López, Felipe (2014-11-01)
      Article
      Restricted access - publisher's policy
      This paper studies the effects of voltage sags caused by faults on doubly-fed induction generators to overcome grid faults. A wide range of sag duration and depth values is considered. It is observed that sag duration ...
    • Distributed cooperative control for stepper motors synchronization 

      Yague, Sauro J.; Reyes Carmenaty, Guillermo; Rolán Blanco, Alejandro; Garcia Cerrada, Aurelio (2018)
      Conference report
      Open Access
      This paper describes the design and simulation of a distributed cooperative control algorithm based on multi-agents to synchronize a group of stepper motors. Modeling of the two-phase hybrid stepper motor in closed loop ...
    • Doubly fed induction generator subject to symmetrical voltage sags 

      Rolán Blanco, Alejandro; Córcoles López, Felipe; Pedra Durán, Joaquim (2011-12)
      Article
      Restricted access - publisher's policy
      The aim of this paper is to analyze the dynamic behavior of the doubly fed induction generator (DFIG) subject to symmetrical voltage sags caused by three-phase faults. A simple control algorithm is considered and assumed ...
    • Doubly fed induction generator-based variable-speed wind turbine: proposal of a simplified model under a faulty grid with short-duration faults 

      Rolán Blanco, Alejandro; Pedra Durán, Joaquim (2019-08)
      Article
      Open Access
      The aim of this study is to provide a simplified model of a variable-speed wind turbine (VSWT) with the technology of a doubly-fed induction generator (DFIG) which operates under faulty grid conditions. A simplified model ...
    • Estudio del efecto de los huecos de tensión en el generador de inducción doblemente alimentado 

      Rolán Blanco, Alejandro (Universitat Politècnica de Catalunya, 2012-02-17)
      Doctoral thesis
      Open Access
      The aim of this doctoral thesis is to analyse the dynamic behaviour of the doubly-fed induction generator exposed to voltage sags. This electrical machine is mainly used in variable-speed wind turbines. Due to the noticeable ...
    • Fault diagnosis and prognosis of a brushless dc motor using a model-based approach 

      Blesa Izquierdo, Joaquim; Quevedo Casín, Joseba Jokin; Puig Cayuela, Vicenç; Nejjari Akhi-Elarab, Fatiha; Zaragoza, Raúl; Rolán Blanco, Alejandro (2020)
      Conference lecture
      Open Access
      This paper proposes a model-based fault diagnosis and prognosis approach applied to brushless DC motors (BLDC). The objective is an early detection of mechanical and electrical faults in BLDC motors operating under a variety ...
    • Initialization of DFIG wind turbines with a phasor-based approach 

      Rolán Blanco, Alejandro; Pedra Durán, Joaquim (2019-03)
      Article
      Open Access
      The 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 ...
    • Integration of cold ironing and renewable sources in the Barcelona smart port 

      Rolán Blanco, Alejandro; Manteca, Paola; Oktar, Rahime; Siano, Pierluigi (2019-11)
      Article
      Restricted access - publisher's policy
      Cold ironing, which is the procedure of supplying shoreside electrical power to a ship at berth when its engines are turned off, arises as the eco-friendly way to deliver power to ships while they are berthed in ports, ...
    • Losses and CMV evaluation in transformerless grid-connected PV topologies 

      Vázquez Guzmán, Gerardo; Kerekes, Tamas; Rolán Blanco, Alejandro; Aguilar Gaván, Daniel; Luna Alloza, Álvaro; Acevedo, Gustavo (2009)
      Conference lecture
      Open Access
      Controlling the thermal losses in the semiconductors ~s well. as the Co~mon Mode Voltage (CMV), are important Issues In the design of power electronics converters for photovoltaic applications. At present time there are ...
    • Modeling and control of a three-phase grid-connected inverter under fault conditions 

      Rolán Blanco, Alejandro; Giménez, Pablo; Yague, Sauro J.; Bogarra Rodríguez, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      The aim of this paper is to study the behavior of a three-phase inverter with an RL filter powered by a renewable energy source and connected to a grid under fault conditions. The novelty of the work lies in proposing a ...
    • Modeling and simulation of synchronous machine and its behaviour against voltage sags 

      Aguilar Gaván, Daniel; Luna Alloza, Álvaro; Rolán Blanco, Alejandro; Vázquez Guzmán, Gerardo; Acevedo, Gustavo (2009)
      Conference lecture
      Open Access
      This paper studies the effects of voltage sags (dips), both symmetrical and unsymmetrical, on the three-phase Synchronous Machine (SM). The vast majority of the electrical power generation systems in the world is consist ...
    • Modeling of a variable speed wind turbine with a permanent magnet synchronous generator 

      Rolán Blanco, Alejandro; Luna Alloza, Álvaro; Vázquez Guzmán, Gerardo; Aguilar Gaván, Daniel; Acevedo, Gustavo (2009)
      Conference lecture
      Open Access
      The aim of this work is to analyze a typical configuration of a Wind Turbine Generator System (WTGS) equipped with a Variable Speed Generator. Nowadays, doublyfed induction generators are being widely used on WTGS, although ...