Now showing items 1-20 of 24

    • A comparison of power conversion systems for modular battery-based energy storage systems 

      Díaz González, Francisco; Heredero Peris, Daniel; Pagès Giménez, Marc; Prieto Araujo, Eduardo; Sumper, Andreas (Institute of Electrical and Electronics Engineers (IEEE), 2020-02-07)
      Article
      Open Access
      A modular battery-based energy storage system is composed by several battery packs distributed among different modules or parts of a power conversion system (PCS). The design of such PCS can be diverse attending to different ...
    • A mathematical model for the scheduling of virtual microgrids topology into an active sistribution network 

      García Muñoz, Fernando Esteban; Díaz González, Francisco; Corchero García, Cristina (Multidisciplinary Digital Publishing Institute, 2020-10-15)
      Article
      Open Access
      This article presents a method based on a mathematical optimization model for the scheduling operation of a distribution network (DN). The contribution of the proposed method is that it permits the configuration and operation ...
    • A power sharing algorithm for a hybrid energy storage system based on batteries 

      Díaz González, Francisco; Aragüés Peñalba, Mònica; Girbau Llistuella, Francesc; Llonch Masachs, Marc; Sumper, Andreas (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      This paper presents a method to operate a hybrid Energy Storage System (ESS) based on a heterogeneous grouping of battery types. In particular, the system is composed by a lithium-ion battery pack and a lead-acid one. The ...
    • A review of energy storage technologies for large scale photovoltaic power plants 

      Bullich Massagué, Eduard; Cifuentes-García, Francisco-Javier; Glenny Crende, Ignacio; Cheah Mañé, Marc; Aragüés Peñalba, Mònica; Díaz González, Francisco; Gomis Bellmunt, Oriol (2020-09-15)
      Article
      Restricted access - publisher's policy
      Energy storage can play an essential role in large scale photovoltaic power plants for complying with the current and future standards (grid codes) or for providing market oriented services. But not all the energy storage ...
    • Analytical dead-band compensation for ZCS modulation applied to hybrid Si-SiC dual active bridge 

      Capó Lliteras, Macià; Heredero Peris, Daniel; Díaz González, Francisco; Llonch Masachs, Marc; Montesinos Miracle, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2020-10-02)
      Article
      Open Access
      This paper proposes a triangular modulation with zero current switching (ZCS) for a hybrid Si-SiC isolated bidirectional DC-DC converter (IBDC). Three of the four legs in the IBDC operate at ZCS and use Si IGBTs, while the ...
    • Arquitectura de una red inteligente rural 

      Girbau Llistuella, Francesc; Sumper, Andreas; Díaz González, Francisco; Sudrià Andreu, Antoni; Castro Cervera, Fernando; Gallart Fernández, Ramon (2015)
      Conference lecture
      Open Access
      El trabajo presentado se enmarca en e l proyecto europeo del programa FP - 7 Smart Rural Grid que tiene como objetivo desarrollar la red rural inteligente y explorar las mejores maneras de hacer la transición de las actuales ...
    • Coordinated operation of wind turbines and flywheel storage for primary frequency control support 

      Díaz González, Francisco; Hau, Melanie; Sumper, Andreas; Gomis Bellmunt, Oriol (2015-06-01)
      Article
      Open Access
      This work assesses the participation of wind power plants in primary frequency control support. To participate in frequency control-related tasks, the wind power plants have to maintain a certain level of power reserves. ...
    • Demonstration experience of the smart rural grid project 

      Girbau Llistuella, Francesc; Sumper, Andreas; Heredero Peris, Daniel; Pagès Giménez, Marc; Chillón Antón, Cristian; Vidal Clos, Josep Andreu; Díaz González, Francisco (2016)
      Conference lecture
      Restricted access - publisher's policy
      This paper aims to detail and illustrate the experiences for the grid-connected mode during the operational phase of the Smart Rural Grid (SRG) project. The SRG project is focused on DSO's capabilities to increase the ...
    • Design methodology for a dc–dc power conversion system with EIS capability for battery packs 

      Díaz González, Francisco; Heredero Peris, Daniel; Galceran Arellano, Samuel (2018-09-01)
      Article
      Open Access
      This paper presents a design methodology for a dc-dc power conversion system (PCS) for battery packs. The methodology provides with an optimal design of the PCS and the associated inductive-capacitive filter interfacing ...
    • DFIG-based offshore wind power plant connected to a single VSC-HVDC operated at variable frequency: Energy yield assessment 

      Prada Gil, Mikel de; Díaz González, Francisco; Gomis Bellmunt, Oriol; Sumper, Andreas (2015-06-15)
      Article
      Open Access
      The existence of HVDC (High Voltage Direct Current) transmission systems for remote offshore wind power plants allows devising novel wind plant concepts, which do not need to be synchronized with the main AC grid. This ...
    • Feasibility analysis of offshore wind power plants with DC collection grid 

      Prada Gil, Mikel de; Domínguez García, José Luis; Díaz González, Francisco; Araguees Penalba, Monica; Gomis Bellmunt, Oriol (2015-06-01)
      Article
      Open Access
      Offshore wind power plants (OWPPs) tend to be larger in size and distant from shore. It is widely accepted that for long distances HVDC links are preferred over HVAC transmission. Accordingly, one possible approach might ...
    • Flicker mitigation by reactive power control in wind farm with doubly fed induction generators 

      Girbau Llistuella, Francesc; Sumper, Andreas; Díaz González, Francisco; Galceran Arellano, Samuel (2014-02)
      Article
      Restricted access - publisher's policy
      This paper presents a novel wind farm control with the purpose to mitigate the flicker emission of doubly fed induction generators. The presented control strategy is implemented in a wind farm connected to a distribution ...
    • Integral approach to energy planning and electric grid assessment in a renewable energy technology integration for a 50/50 target applied to a small island 

      Mendoza Vizcaino, Javier; Raza, Muhammad; Sumper, Andreas; Díaz González, Francisco; Galceran Arellano, Samuel (2019-01-01)
      Article
      Open Access
      This paper presents an energy planning, a grid assessment, and an economic analysis, considering three growing scenarios (Low, Base and High) in the electricity consumption, to supply the energy demand for a hybrid power ...
    • Local performance of the smart rural grid through the local energy management system 

      Girbau Llistuella, Francesc; Sumper, Andreas; Díaz González, Francisco; Sudrià Andreu, Antoni; Gallart, R (2017)
      Conference report
      Restricted access - publisher's policy
      This paper aims to detail and illustrate the operation of the LEMS during the grid-connected and grid-disconnected mode of the Smart Rural Grid (SRG) project. The SRG project is focused on DSO’s capabilities to increase ...
    • Methodology for the economic optimisation of energy storage systems for frequency support in wind power plants 

      Johnstone, Lewis; Díaz González, Francisco; Gomis Bellmunt, Oriol; Corchero García, Cristina; Cruz Zambrano, Miguel (2015-01-01)
      Article
      Open Access
      This paper proposes a methodology for the economic optimisation of the sizing of Energy Storage Systems (ESSs) whilst enhancing the participation of Wind Power Plants (WPP) in network primary frequency control support. The ...
    • Microgrid clustering architectures 

      Bullich Massagué, Eduard; Díaz González, Francisco; Aragüés Peñalba, Mònica; Girbau Llistuella, Francesc; Olivella Rosell, Pol; Sumper, Andreas (2018-02-15)
      Article
      Restricted access - publisher's policy
      Microgrids are considered one of the most promising solutions to integrate renewable distributed generation into the electric power system. During the last decade, the microgrid concept has been studied and developed and ...
    • Modeling and validation of a flywheel energy storage lab-setup 

      Díaz González, Francisco; Sumper, Andreas; Gomis Bellmunt, Oriol; Villafafila Robles, Roberto (2012)
      Conference report
      Open Access
      This work deals with the modeling, control and experimental validation of a flywheel test bench which is part of IREC’s lab-scale microgrid. The storage device has been designed as a proof of concept. It is based on a ...
    • Modelización y control de una pinza de soldadura industrial 

      Díaz González, Francisco (Universitat Politècnica de Catalunya, 2009-09)
      Master thesis (pre-Bologna period)
      Open Access
      El presente proyecto trata sobre la modelización y el control de la fuerza aplicada (de compresión), sobre unas piezas a soldar por una pinza de soldadura industrial. La tecnología de soldaduras prescribe en algunos casos ...
    • Optimization of the operation of smart rural grids through a novel rnergy management system 

      Girbau Llistuella, Francesc; Díaz González, Francisco; Sumper, Andreas (2018-01)
      Article
      Open Access
      The paper proposes an innovative Energy Management System (EMS) that optimizes the grid operation based on economic and technical criteria. The EMS inputs the demand and renewable generation forecasts, electricity prices ...
    • Primer examen parcial 

      Díaz González, Francisco (Universitat Politècnica de Catalunya, 2017-04-07)
      Exam
      Restricted access to the UPC academic community