Patents by Inventor Daniel Rabal

Daniel Rabal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10509386
    Abstract: The present invention is a method for the control of power ramp-rates minimizing energy storage requirements in intermittent power generation plants, such as for example a photovoltaic solar plant, which minimizes the energy storage requirements approximately halving the size of storage systems necessary to comply with a maximum allowable ramp-rate given by a grid code regulation regarding the state of the art, reducing thus investment costs in the plant and/or carrying out a rationalized use of the energy storage system, in such a way that in order to achieve the same maximum fluctuation ramp, a minor use is done of the energy storage system, minimizing the losses and extending its working life, and therefore reducing the plant operational costs.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: December 17, 2019
    Assignee: ACCIONA ENERGIA, S.A.
    Inventors: Eugenio Guelbenzu Michelena, Asun Padros Razquin, Daniel Rabal Echeverria, Luis Marroyo Palomo, Javier Marcos Alvarez, Iñigo De La Parra Laita, Miguel Garcia Solano
  • Patent number: 10291031
    Abstract: The invention falls within the technical field associated with methods for controlling power fluctuation ramps using energy storage systems in plants for intermittent energy generation, wherein said method reduces the size of the energy storage system necessary to fulfill the requirement of a maximum power fluctuation ramp, by means of a step of imposing a maximum power variation ramp by imposing the dynamic component of the ramp, defined as the gradient according to which the power of the plant is varied in each control cycle in accordance with the state of charge of the energy storage system (SOC).
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: May 14, 2019
    Assignee: ACCIONA ENERGIA, S.A.
    Inventors: Maria Asuncion Padros, Daniel Rabal, Inigo Berazaluce, David Cuesta, Luis Marroyo, Javier Marcos
  • Publication number: 20160241041
    Abstract: The invention falls within the technical field associated with methods for controlling power fluctuation ramps using energy storage systems in plants for intermittent energy generation, wherein said method reduces the size of the energy storage system necessary to fulfill the requirement of a maximum power fluctuation ramp, by means of a step of imposing a maximum power variation ramp by imposing the dynamic component of the ramp, defined as the gradient according to which the power of the plant is varied in each control cycle in accordance with the state of charge of the energy storage system (SOC).
    Type: Application
    Filed: September 30, 2013
    Publication date: August 18, 2016
    Inventors: Maria Asuncion Padros, Daniel Rabal, Inigo Berazaluce, David Cuesta, Luis Marroyo, Javier Marcos
  • Publication number: 20160154397
    Abstract: The present invention is a method for the control of power ramp-rates minimizing energy storage requirements in intermittent power generation plants, such as for example a photovoltaic solar plant, which minimizes the energy storage requirements approximately halving the size of storage systems necessary to comply with a maximum allowable ramp-rate given by a grid code regulation regarding the state of the art, reducing thus investment costs in the plant and/or carrying out a rationalized use of the energy storage system, in such a way that in order to achieve the same maximum fluctuation ramp, a minor use is done of the energy storage system, minimizing the losses and extending its working life, and therefore reducing the plant operational costs.
    Type: Application
    Filed: November 25, 2015
    Publication date: June 2, 2016
    Inventors: Eugenio GUELBENZU MICHELENA, Asun Padros Razquin, Daniel Rabal Echeverria, Luis Marroyo Palomo, Javier Marcos Alvarez, Iñigo De La Parra Laita, Miguel Garcia Solano
  • Patent number: 8930035
    Abstract: A process for simultaneously providing capacity sale services (e.g. frequency regulation or voltage regulation), energy sale services (energy transfer from off-peak hours to peak hours), and stabilization services of a renewable plant may be provided. The process includes determining the values of energy quantity to be produced by the plant during a near future time interval. The process may also include introducing the values of energy quantity, in the control unit. Generating an hourly program of energy supply to be provided by the energy accumulator unit to the network may also be performed, depending on the values of energy to be produced, which stabilizes the power supplied by the plant to the network. Furthermore, the frequency and the voltage of the network may be regulated as well as transfers the energy between off-peak hours and peak hours, or from hours with saturation of the network to hours without saturation.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: January 6, 2015
    Assignee: Acciona Energia, S.A.
    Inventors: Luis Marroyo Palomo, Javier Marcos Álvarez, María Asunción Padros Razquin, Daniel Rabal Echeverria, David Cuesta Lerín, Iñigo Berazaluce Minondo, Christopher Walti
  • Publication number: 20130006431
    Abstract: A process for simultaneously providing capacity sale services (e.g. frequency regulation or voltage regulation), energy sale services (energy transfer from off-peak hours to peak hours), and stabilization services of a renewable plant may be provided. The process includes determining the values of energy quantity to be produced by the plant during a near future time interval. The process may also include introducing the values of energy quantity, in the control unit. Generating an hourly programme of energy supply to be provided by the energy accumulator unit to the network may also be performed, depending on the values of energy to be produced, which stabilizes the power supplied by the plant to the network. Furthermore, the frequency and the voltage of the network may be regulated as well as transfers the energy between off-peak hours and peak hours, or from hours with saturation of the network to hours without saturation.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 3, 2013
    Applicant: ACCIONA ENERGIA, S.A.
    Inventors: LUIS MARROYO PALOMO, Javier MARCOS ÁLVAREZ, Mariá Asunción PADROS RAZQUIN, Daniel RABAL ECHEVERRIA, David CUESTA LERÍN, Iñigo BERAZALUCE MINONDO, Christopher WALTI