Patents by Inventor Oscar Alonso Sadaba
Oscar Alonso Sadaba 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).
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Patent number: 9716384Abstract: System and method for controlling a wind farm, for wind farms comprising a plurality of wind turbines having a rotor, a generator, a control unit and connections to the mains of the wind farm, the wind turbines generating reactive power according to the instructions of the wind farm control system, the control system calculating a global reactive power demand to be produced by the whole wind farm on the basis of the voltage at the connection point or the power factor required, and the control system sending reactive power instructions to the wind turbines of the farm, the control system receiving information based on one or more parameters indicating the level of heating of the electrical components of the wind turbines, the generation of reactive power being distributed between the various wind turbines.Type: GrantFiled: January 19, 2009Date of Patent: July 25, 2017Assignee: ACCIONA WINDPOWER, S.A.Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Ricardo Royo Garcia, Miguel Nuñez Polo
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Patent number: 9587626Abstract: Control system and method for a wind turbine generator, such wind turbine being a variable speed turbine and having a doubly fed induction generator, said control system comprising means for determining the operating temperature of the different subsystems, having the means for dividing the generation of reactive power, both inductive and capacitive, between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far away as possible from its corresponding limit, the method comprising the following steps: determine the electrical elements temperature; calculate the closeness of those temperatures to each element corresponding limit temperature; and distribute the reactive power production between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far as possible from its corresponding limit.Type: GrantFiled: May 8, 2008Date of Patent: March 7, 2017Assignee: Acciona Windpower, S.A.Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Ricardo Royo García, Miguel Núñez Polo
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Patent number: 9257845Abstract: A method for controlling a power generation plant may be provided. First, an equivalent grid voltage may be estimated based on electric magnitudes measured at a connection point of the power generation plant and an equivalent model of a power grid to which the power generation plant is connected. Then, on the basis of said estimated equivalent voltage, a command indicative of reactive power to be produced by the power generation plant may be generated.Type: GrantFiled: March 16, 2010Date of Patent: February 9, 2016Assignee: ACCIONA WINDPOWER, S.A.Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Igor Egaña Santamarina, Ricardo Royo Garcia, Jose Miguel Garcia Sayes, Miguel Nuñez Polo
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Patent number: 8928163Abstract: The present invention describes a process for controlling the active power injected into the grid by a generating plant for contributing to the stability of the power grid in the event of frequency variations where, in response to a deviation in grid frequency, each generating unit calculates an active power variation parameter generated based on a first parameter stored in said generating unit, said first parameter being representative of a respective contribution of said generating unit to a required variation in total active power of the generating plant, and where a central control unit of the generating plant connected to each generating unit updates the value of the first parameters when changes are produced therein.Type: GrantFiled: June 6, 2011Date of Patent: January 6, 2015Assignee: Acciona Windpower, S.A.Inventors: Teresa Arlaban Gabeiras, Oscar Alonso Sadaba, Jose Miguel Garcia Sayes, Ricardo Royo Garcia, Miguel Nuñez Polo
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Patent number: 8896142Abstract: The present disclosure relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF) and a regulator (1) which calculates the reactive power to be generated (QT) as a function of the voltage error (?V), such that it can be operated over the entire voltage range. The system also includes: at least one saturator element (2, 6, 7) in which the reactive power to be generated is limited, whereby the limits (Q—MAX, Q—MIN, QC—MAX, QC—MIN, QS—MAX, QS—MIN) are calculated dynamically as a function of the voltage, this block outputting a reference reactive power of the wind turbine (Q—REF, QC—REF, Qs—REF); and an element (3) for calculating the actual limit of the active power (PMAX) as a function of the pre-limited reactive power (Q—REF, Qs—REF) and the apparent power available at that moment.Type: GrantFiled: June 3, 2009Date of Patent: November 25, 2014Assignee: Acciona Windpower, S.A.Inventors: Teresa Arlaban Gabeiras, Oscar Alonso Sadaba, Ana Huarte Amezqueta, Alberto García Barace, José Miguel García Sayes, Ricardo Royo García, Stephen Tonks, Miguel Núñez Polo
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Patent number: 8659178Abstract: A wind turbine control method for dampening vibrations of a transmission system, even in the presence of voltage dips and in any event that is susceptible to reducing active current generation capacity, is provided. First, for example, an initial torque or power instruction may be calculated based on a turbine operating state. Next, a torque or power adjustment term associated with dampening vibration modes of a turbine transmission system may be calculated. Then, a final torque or power instruction may be calculated by, for example, applying the adjustment term to the initial instruction. Finally, the final torque or power instruction may be transformed into a current instruction for controlling the wind turbine.Type: GrantFiled: February 11, 2010Date of Patent: February 25, 2014Assignee: Acciona Windpower, S.A.Inventors: Teresa Arlabán Gabeiras, Oscar Alonso Sádaba, Alberto Garcia Barace, Ricardo Royo García, Stephen Tonks, José Miguel García Sayés, Miguel Nuñez Polo
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Patent number: 8355825Abstract: Wind farm, of the kind that comprises a series of wind turbine generators, which consist of a rotor, a generator, a control unit and means of connection to the computing network for the wind farm of which they form part, in such a way that at least two of the wind turbine generators in the farm can assume a leader hierarchy for the wind farm, accessing the operating data of the rest of the wind turbine generators, calculating and sending instructions to the rest of the wind turbine generators making up that wind farm, and a subject hierarchy, receiving and following the instructions coming from the leader wind turbine generator of the wind farm.Type: GrantFiled: November 19, 2008Date of Patent: January 15, 2013Assignee: Acciona Windpower, S.A.Inventors: Oscar Alonso Sádaba, Ricardo Royo García, Miguel Núnez Polo
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Publication number: 20120203384Abstract: The present invention describes a process for controlling the active power injected into the grid by a generating plant for contributing to the stability of the power grid in the event of frequency variations where, in response to a deviation in grid frequency, each generating unit calculates an active power variation parameter generated based on a first parameter stored in said generating unit, said first parameter being representative of a respective contribution of said generating unit to a required variation in total active power of the generating plant, and where a central control unit of the generating plant connected to each generating unit updates the value of the first parameters when changes are produced therein.Type: ApplicationFiled: June 6, 2011Publication date: August 9, 2012Applicant: ACCIONA WINDPOWER, S.A.Inventors: Teresa ARLABAN GABEIRAS, Oscar Alonso Sadaba, Jose Miguel Garcia Sayes, Ricardo Royo Garcia, Miguel Nunez Polo
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Publication number: 20110156389Abstract: The present disclosure relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF) and a regulator (1) which calculates the reactive power to be generated (QT) as a function of the voltage error (?V), such that it can be operated over the entire voltage range. The system also includes: at least one saturator element (2, 6, 7) in which the reactive power to be generated is limited, whereby the limits (Q—MAX, Q—MIN, QC—MAX, QC—MIN, QS—MAX, QS—MIN) are calculated dynamically as a function of the voltage, this block outputting a reference reactive power of the wind turbine (Q—REF, QC—REF, Qs—REF); and an element (3) for calculating the actual limit of the active power (PMAX) as a function of the pre-limited reactive power (Q—REF, Qs—REF) and the apparent power available at that moment.Type: ApplicationFiled: June 3, 2009Publication date: June 30, 2011Inventors: Teresa Arlaban Gabeiras, Oscar Alonso Sadaba, Ana Huarte Amezqueta, Alberto García Barace, José Miguel García Sayes, Ricardo Royo García, Stephen Tonks, Miguel Núñez Polo
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Publication number: 20100298991Abstract: System and method for controlling a wind farm, for wind farms comprising a plurality of wind turbines having a rotor, a generator, a control unit and means for connecting to the mains of the wind farm, said wind turbines having means for generating reactive power according to the instructions of the wind farm control system, said control system calculating a global reactive power demand to be produced by the whole wind farm on the basis of the voltage at the connection point or the power factor required, and said control system sending reactive power instructions to the wind turbines of the farm, the central control system for the wind turbines receiving information based on one or more parameters indicating the level of heating of the electrical components of the wind turbines, the generation of reactive power being distributed between the various wind turbines.Type: ApplicationFiled: January 19, 2009Publication date: November 25, 2010Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Ricardo Royo Garcia, Miguel Nuñez Polo
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Publication number: 20100274399Abstract: Wind farm, of the kind that comprises a series of wind turbine generators, which consist of a rotor, a generator, a control unit and means of connection to the computing network for the wind farm of which they form part, in such a way that at least two of the wind turbine generators in the farm can assume a leader hierarchy for the wind farm, accessing the operating data of the rest of the wind turbine generators, calculating and sending instructions to the rest of the wind turbine generators making up that wind farm, and a subject hierarchy, receiving and following the instructions coming from the leader wind turbine generator of the wind farm.Type: ApplicationFiled: November 19, 2008Publication date: October 28, 2010Inventors: Oscar Alonso Sádaba, Ricardo Royo Garcia, Miguel Nunez Polo
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Publication number: 20100256829Abstract: Control system and method for a wind turbine generator, such wind turbine being a variable speed turbine and having a doubly fed induction generator, said control system comprising means for determining the operating temperature of the different subsystems, having the means for dividing the generation of reactive power, both inductive and capacitive, between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far away as possible from its corresponding limit, the method comprising the following steps: determine the electrical elements temperature; calculate the closeness of those temperatures to each element corresponding limit temperature; and distribute the reactive power production between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far as possible from its corresponding limit.Type: ApplicationFiled: May 8, 2008Publication date: October 7, 2010Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Ricardo Royo Garcia, Miguel Nunez Polo
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Publication number: 20100237834Abstract: A method for controlling a power generation plant may be provided. First, an equivalent grid voltage may be estimated based on electric magnitudes measured at a connection point of the power generation plant and an equivalent model of a power grid to which the power generation plant is connected. Then, on the basis of said estimated equivalent voltage, a command indicative of reactive power to be produced by the power generation plant may be generated.Type: ApplicationFiled: March 16, 2010Publication date: September 23, 2010Applicant: ACCIONA WINDPOWER, S.A.Inventors: Oscar Alonso Sadaba, Teresa Arlaban Gabeiras, Igor Egaña Santamarina, Ricardo Royo Garcia, Jose Miguel Garcia Sayes, Miguel Nuñez Polo
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Publication number: 20100219634Abstract: A wind turbine control method for dampening vibrations of a transmission system, even in the presence of voltage dips and in any event that is susceptible to reducing active current generation capacity, is provided. First, for example, an initial torque or power instruction may be calculated based on a turbine operating state. Next, a torque or power adjustment term associated with dampening vibration modes of a turbine transmission system may be calculated. Then, a final torque or power instruction may be calculated by, for example, applying the adjustment term to the initial instruction. Finally, the final torque or power instruction may be transformed into a current instruction for controlling the wind turbine.Type: ApplicationFiled: February 11, 2010Publication date: September 2, 2010Applicant: ACCIONA WINDPOWER, S.A.Inventors: TERESA ARLABAN GABEIRAS, Oscar Alonso Sádaba, Alberto Garcia Barace, Ricardo Royo García, Stephen Tonks, José Miguel García Sayés, Miguel Nuñez Polo