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    • Novel fault location algorithm for meshed distribution networks with DERs 

      Silos Sánchez, Angel; Villafafila Robles, Roberto; Lloret Gallego, Pau (2020-04-01)
      Article
      Accés obert
      Modern electrical networks are continuously evolving due to the increasing deployment of Information Technologies and Distributed Energy Resources (DERs). This scenario affects the quality of the electricity supply of ...

    • Optimization of surge arrester locations in overhead distribution networks 

      Bullich Massagué, Eduard; Sumper, Andreas; Villafafila Robles, Roberto; Rull Duran, Joan (2015-04-01)
      Article
      Accés obert
      Lightning is considered one of the main causes of faults in overhead distribution networks. Direct strokes usually lead to flashovers due to the insulation levels that are used. Induced overvoltages caused by indirect ...

    • Optimization problem for meeting distribution system operator requests in local flexibility markets with distributed energy resources 

      Olivella Rosell, Pol; Bullich Massagué, Eduard; Aragüés Peñalba, Mònica; Sumper, Andreas; Ottesen, Stig Odegaard; Vidal Clos, Josep Andreu; Villafafila Robles, Roberto (2018-01-15)
      Article
      Accés restringit per política de l'editorial
      The increasing penetration of distributed energy resources in the distribution grid is producing an ever-heightening interest in the use of the flexibility on offer by said distributed resources as an enhancement for the ...

    • Pareto optimal reconfiguration of power distribution systems using a genetic algorithm based on NSGA-II 

      Tomoiaga, Bogdan; Chindris, Mircea; Sumper, Andreas; Sudrià Andreu, Antoni; Villafafila Robles, Roberto (2013-03-06)
      Article
      Accés obert
      Reconfiguration, by exchanging the functional links between the elements of the system, represents one of the most important measures which can improve the operational performance of a distribution system. The authors ...

    • Performance of fixed speed wind turbines under system frequency deviations 

      Sumper, Andreas; Gomis Bellmunt, Oriol; Sudrià Andreu, Antoni; Villafafila Robles, Roberto; Rull Duran, Joan (2010-04)
      Comunicació de congrés
      Accés obert
      This paper studies the impact of system frequency deviations on the operation of fixed speed induction generators used in wind turbine generation systems(WTGS). It presents an analytic method to predict the angular speed, ...

    • Probabilistic agent-based model of electric vehicle charging demand to analyse the impact on distribution networks 

      Olivella Rosell, Pol; Villafafila Robles, Roberto; Sumper, Andreas; Bergas Jané, Joan Gabriel (2015-05-11)
      Article
      Accés obert
      Electric Vehicles (EVs) have seen significant growth in sales recently and it is not clear how power systems will support the charging of a great number of vehicles. This paper proposes a methodology which allows the ...

    • Probabilistic method to assess the impact of charging of electric vehicles on distribution grids 

      Valsera Naranjo, Eduardo; Sumper, Andreas; Villafafila Robles, Roberto; Martínez Vicente, David (2012-05-18)
      Article
      Accés obert
      This paper describes a grid impact analysis of charging electric vehicles (EV) using charging curves with detailed battery modelling. A probabilistic method using Monte Carlo was applied to a typical Spanish distribution ...

    • Profitability analysis on demand-side flexibility: A review 

      Forero Quintero, José Fernando; Villafafila Robles, Roberto; Barja Martínez, Sara; Munné Collado, Íngrid; Olivella Rosell, Pol; Montesinos Miracle, Daniel (2022-11)
      Article
      Accés obert
      Flexibility has emerged as an optimal solution to the increasing uncertainty in power systems produced by the continuous development and penetration of distributed generation based on renewable energy. Many studies have ...

    • Propuesta metodológica para la evaluación e instalación de Sistemas de Alimentación Ininterrumpida (SAIs) de gran potencia 

      Villafafila Robles, Roberto (Universitat Politècnica de Catalunya, 2004-12)
      Projecte/Treball Final de Carrera
      Accés obert

    • Renewable energy emulation concepts for microgrids 

      Prieto Araujo, Eduardo; Olivella Rosell, Pol; Cheah Mañé, Marc; Villafafila Robles, Roberto; Gomis Bellmunt, Oriol (2015-10-01)
      Article
      Accés obert
      This paper reviews the renewable energy systems emulators proposals for microgrid laboratory testing platforms. Four emulation conceptual levels are identified based on the literature analysis performed. Each of these ...

    • Review of flux-weakening algorithms to extend the speed range in electric vehicle applications with permanent magnet synchronous machines 

      Miguel Espinar, Carlos; Heredero Peris, Daniel; Villafafila Robles, Roberto; Montesinos Miracle, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Article
      Accés obert
      This article reviews Flux-Weakening (FW) algorithms for Permanent Magnet Synchronous Machines (PMSMs), focusing on the automotive sector, especially in electric and hybrid electric vehicles. In the past few years, the ...

    • Sistemas de alimentación ininterrumpida: calidad de suministro eléctrico 

      Villafafila Robles, Roberto; Sumper, Andreas; Sudrià Andreu, Antoni (Grupo Tecnipublicaciones, 2008-01)
      Article
      Accés restringit per política de l'editorial
      En una sociedad eléctricamente dependiente como la del siglo XXI, la calidad de suministro eléctrico tiene repercusiones en negocios y procesos productivos, además de afectar a las actividades domésticas. Limitar el impacto ...

    • Sistemas de cable superconductor para trasmisión de energía 

      del Rosario Calaf, Gerard; Villafafila Robles, Roberto; Lloret Gallego, Pau; Sudrià Andreu, Antoni (Grupo Tecnipublicaciones, 2008-10)
      Article
      Accés restringit per política de l'editorial
      La superconductividad es una propiedad física que tienen determinados materiales, llamados superconductores, que consiste en una resistencia eléctrica virtualmente nula cuando se encuentran por debajo de una temperatura, ...

    • Sistemas de monitorización de energía eléctrica 

      Lloret Gallego, Pau; Herrera Ramos, Francisco de Paula; Villafafila Robles, Roberto (Grupo Tecnipublicaciones, 2013-10)
      Article
      Accés restringit per política de l'editorial
      El creciente incremento de los costes fijos y variables de la factura eléctrica está haciendo que se considere imprescindible supervisar y controlar cómo se consume para asegurar la máxima eficiencia en su uso y conseguir ...

    • Sistemas fotovoltaicos conectados a la red eléctrica 

      Villafafila Robles, Roberto; Rull Duran, Joan; Galceran Arellano, Samuel; Montesinos Miracle, Daniel; Gross, Gabriel Igor (Grupo Tecnipublicaciones, 2010-04)
      Article
      Accés restringit per política de l'editorial
      Las instalaciones solares fotovoltaicas para la producción de electricidad han tenido un crecimiento exponencial muy acusado apoyadas en un marco retributivo muy favorable. Esta vertiginosa evolución conlleva que en su ...

    • Software Tool for the Analysis of Electromagnetic Disturbances Propagation 

      Chindris, Mircea; Cziker, Andrei; Sumper, Andreas; Miron, Anca; Sudrià Andreu, Antoni; Villafafila Robles, Roberto (2010-03-23)
      Text en actes de congrés
      Accés obert
      The analysis of the conducted electromagnetic disturbances propagation is a complex issue, involving detection and analysis of electromagnetic disturbances, modelling of power grids’ elements, and study of the influenceon ...

    • Study of optimization design criteria for stand-alone hybrid renewable power systems 

      Martínez Díaz, Maria del Mar; Villafafila Robles, Roberto; Montesinos Miracle, Daniel; Sudrià Andreu, Antoni (2013)
      Comunicació de congrés
      Accés obert
      Hybrid renewable power systems integrate two or more sources of energy, one of which is renewable, optionally a storage system and typically work in stand-alone mode. They are being considered more and more and we should ...

    • System architecture for managing congestions in distributions grids using flexibility 

      Munné Collado, Íngrid; Lloret Gallego, Pau; Olivella Rosell, Pol; Villafafila Robles, Roberto; Ottesen, Stig Ø.; Palma Costa, Vera; Gallart, Ramon; Sumper, Andreas (2019)
      Comunicació de congrés
      Accés obert
      The increased penetration of renewable, intermittent and distributed energy resources, flexible loads and EVs in the distribution network, has arisen congestion issues at medium and low voltage level. These flexible ...

    • The CDMtek-PM: An educational platform for learning about motion control and electrical drives 

      Armero Almazán, Pablo; Montesinos Miracle, Daniel; Galceran Arellano, Samuel; Rull Duran, Joan; Villafafila Robles, Roberto; Boix Aragonès, Oriol (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The module CDMtek-PM has been developed with the needs of the electrical engineering students in mind. It is intended to serve as a platform to begin to consolidate the theoretical knowledge learned during the classes by ...

    • The potential role of flexibility during peak hours on greenhouse gas emissions: A life cycle assessment of five targeted national electricity grid mixes 

      Munné Collado, Íngrid; Aprà, Fabio Maria; Olivella Rosell, Pol; Villafafila Robles, Roberto (2019-11-22)
      Article
      Accés obert
      On the path towards the decarbonization of the electricity supply, flexibility and demand response have become key factors to enhance the integration of distributed energy resources, shifting the consumption from peak hours ...