Now showing items 1-16 of 16

  • 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
    Restricted access - publisher's policy
    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 ...
  • 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
    Restricted access - publisher's policy
    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
  • Short-term energy storage for power quality improvement in weak MV grids with distributed renewable generation 

    Díaz González, Francisco; del Rosario Calaf, Gerard; Girbau Llistuella, Francesc; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference lecture
    Open Access
    The intermittent and stochastic nature of renewable energy sources impose several challenges for the operation of electrical networks, and affect power quality levels as well. This paper addresses one of the issues associated ...
  • Smart grid architecture for rural distribution networks: application to a Spanish pilot network 

    Girbau Llistuella, Francesc; Díaz González, Francisco; Sumper, Andreas; Gallart, R; Heredero Peris, Daniel (2018-04-04)
    Article
    Open Access
    This paper presents a novel architecture for rural distribution grids. This architecture is designed to modernize traditional rural networks into new Smart Grid ones. The architecture tackles innovation actions on both the ...
  • Strategies for reactive power control in wind farms with STATCOM 

    Díaz González, Francisco; Martínez Rojas, Marcela; Sumper, Andreas; Gomis Bellmunt, Oriol (2010)
    Conference report
    Open Access
    This paper presents three strategies for reactive power control in wind farms with STATCOM. First, the STATCOM system and its applications in electric power systems and wind farms are shown. Second, the modeling done of ...