Patents by Inventor Remus Teodorescu
Remus Teodorescu 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: 9859828Abstract: The present invention relates to method for operating a power plant, with at least one wind turbine generator arranged for supplying power to an electrical grid, at least one energy storage device arranged for supplying power to the electrical grid, and a power plant controller, the method comprises, measuring repetitively measurement sets of at least one electrical parameter from the electrical grid, and calculating, in respect the measurement sets of the at least one electrical parameter, a change in active and/or a required change in reactive power at a point of common coupling, and calculating and dispatching of a first control reference signal to the at least one wind turbine generator and a second control reference signal to the at least one energy storage device, for providing ancillary service functionalities to the electrical grid.Type: GrantFiled: February 7, 2013Date of Patent: January 2, 2018Assignee: VESTAS WIND SYSTEMS A/SInventors: Germán Claudio Tarnowski, Philip Carne Kjær, Rasmus Lærke, Florin Iov, Remus Teodorescu, Andrzej Adamczyk
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Publication number: 20160248246Abstract: A wind turbine generator 1 is connected to a section 2 of an electricity grid 3 via a converter 4, which converts the ac output power from the generator into three-phase electric power at the voltage and frequency of the grid 3. The converter 4 comprises silicon carbide transistors which act as ON-OFF switches which are controlled so as to create a voltage profile which is the same as that of the grid voltage. Each grid section 2, 2? has a respective circuit breaker 10, 10? which disconnects the associated section from the remainder of the grid 3 in the event of an abnormally high current. The converter 2 includes a fault detector 11 arranged to detect grid faults, such as an abnormally low voltage level which, in response, generates an alarm signal which causes a high-level transient current to be supplied to the grid 3 sufficient to trip the circuit breaker 10? so as to disconnect the faulty section of the grid.Type: ApplicationFiled: September 17, 2014Publication date: August 25, 2016Applicants: VESTAS WIND SYSTEMS A/S, VESTAS WIND SYSTEMS A/SInventors: Lars HELLE, Remus TEODORESCU
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Patent number: 9382898Abstract: A wind turbine includes a grid side converter coupled to a grid via a power line. The method includes determining a first active power reference and a first reactive power reference indicating a requested amount of active power and reactive power, respectively, depending on at least a wind turbine operation strategy; determining a positive and negative sequence components of a grid voltage; determining indications of an actual amount of active power and reactive power to be supplied by the grid side converter to the grid, respectively; generating a parameters defining a proportion of positive sequence current component and negative sequence current component to be injected by the grid side converter in order to supply active power and reactive power; and supplying, with the grid side converter, active and reactive power to the power line based on the current reference.Type: GrantFiled: November 8, 2011Date of Patent: July 5, 2016Assignee: Vestas Wind Systems A/SInventors: Remus Teodorescu, Pedro Rodriguez, Alvaro Luna Alloza, Amit Kumar Gupta
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Publication number: 20150381089Abstract: The present invention relates to method for operating a power plant, with at least one wind turbine generator arranged for supplying power to an electrical grid, at least one energy storage device arranged for supplying power to the electrical grid, and a power plant controller, the method comprises, measuring repetitively measurement sets of at least one electrical parameter from the electrical grid, and calculating, in respect the measurement sets of the at least one electrical parameter, a change in active and/or a required change in reactive power at a point of common coupling, and calculating and dispatching of a first control reference signal to the at least one wind turbine generator and a second control reference signal to the at least one energy storage device, for providing ancillary service functionalities to the electrical grid.Type: ApplicationFiled: February 7, 2013Publication date: December 31, 2015Inventors: Germán Claudio TARNOWSKI, Philip Carne KJÆR, Rasmus LÆRKE, Florin IOV, Remus TEODORESCU, Andrzej ADAMCZYK
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Patent number: 9166508Abstract: The invention relates to a synchronous power controller for a generation system based on static power converters, said controller comprising two main blocks referred to as: block 1 (electric block) (10) and block 2 (electromechanical block) (20), electric block 1 (10) being, in turn, formed by a virtual electrical characteristic controller (11) and a virtual admittance controller (12) and the electromechanical block 2 (20) being formed by a virtual electromechanical characteristic controller (21) and an inertia and damping factor controller (22).Type: GrantFiled: February 27, 2012Date of Patent: October 20, 2015Assignee: Abengoa Solar New Technologies, S.A.Inventors: Pedro Rodriguez Cortés, José Ignacio Candela Garcia, Joan Rocabert Delgado, Remus Teodorescu
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Patent number: 8994363Abstract: The present invention relates to a grid monitoring system, in particular a grid monitoring system enabling real-time monitoring of grid variables, e.g. voltage and current, in electrical power systems, such as single or three-phase networks. The grid monitoring system includes a harmonic detection unit being adapted to subtract harmonics of an input signal before feeding the input signal to a plurality of signal generators in the harmonic detection unit.Type: GrantFiled: October 31, 2009Date of Patent: March 31, 2015Assignee: Vestas Wind Systems A/SInventors: Pedro Rodriguez, Remus Teodorescu
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Publication number: 20140067138Abstract: The invention relates to a virtual controller of electromechanical characteristics for a static power converter that includes a PLC (23) (power loop controller), which receives, at the input thereof, the power difference (?P) between the input power (Pin) (power delivered to the converter by the primary source) and the power delivered to the grid (Pelec) and is able to modify online the parameters of the virtual inertia coefficient and the damping factor as a function of the desired response and of the grid conditions for different frequency ranges.Type: ApplicationFiled: February 27, 2012Publication date: March 6, 2014Applicant: ABENGOA SOLAR NEW TECHNOLOGIES, S.A.Inventors: Pedro Rodríguez Cortés, José Ignacio Candela García, Joan Roberto Delgado, Remus Teodorescu
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Publication number: 20140049228Abstract: The invention relates to a synchronous power controller for a generation system based on static power converters, said controller comprising two main blocks referred to as: block 1 (electric block) (10) and block 2 (electromechanical block) (20), electric block 1 (10) being, in turn, formed by a virtual electrical characteristic controller (11) and a virtual 10 admittance controller (12) and the electromechanical block 2 (20) being formed by a virtual electromechanical characteristic controller (21) and an inertia and damping factor controller (22).Type: ApplicationFiled: February 27, 2012Publication date: February 20, 2014Inventors: Pedro Rodríguez Cortés, José Ignacio Candela Garcia, Joan Rocabert Delgado, Remus Teodorescu
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Publication number: 20140049233Abstract: The invention relates to a virtual admittance controller based on static power converters, comprising a control loop into the inlet of which is injected the difference in voltage between a virtual internal voltage (e) and the voltage at the network connection point (v). Said difference in voltages feeds a virtual admittance processor (13) that determines the value of a reference current (i*) that it communicates to a current source (14), said current source physically injecting said current into the network (15).Type: ApplicationFiled: February 27, 2012Publication date: February 20, 2014Applicant: Abengoa Solar New Technologies, S.A.Inventors: Pedro Rodríguez Cortés, José Ignacio Candela Garcia, Joan Rocabert Delgado, Remus Teodorescu
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Publication number: 20140015250Abstract: A wind turbine includes a grid side converter coupled to a grid via a power line. The method includes determining a first active power reference and a first reactive power reference indicating a requested amount of active power and reactive power, respectively, depending on at least a wind turbine operation strategy; determining a positive and negative sequence components of a grid voltage; determining indications of an actual amount of active power and reactive power to be supplied by the grid side converter to the grid, respectively; generating a parameters defining a proportion of positive sequence current component and negative sequence current component to be injected by the grid side converter in order to supply active power and reactive power; and supplying, with the grid side converter, active and reactive power to the power line based on the current reference.Type: ApplicationFiled: November 8, 2011Publication date: January 16, 2014Applicant: VESTAS WIND SYSTEMS A/SInventors: Remus Teodorescu, Pedro Rodriguez, Alvaro Luna Alloza, Amit Kumar Gupta
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Patent number: 8067932Abstract: This invention deals with an advanced Real-time Grid Monitoring System (RTGMS) suitable for both single-phase and three-phase electric power systems. This invention provides an essential signal processing block to be used as a part of complex systems either focused on supervising and diagnosing power systems or devoted to control power processors interacting with the grid. This invention is based on a new algorithm very suitable for real-time characterization of the grid variables under distorted and unbalanced grid conditions. The main characteristic of this invention is the usage of a frequency-locked loop, based on detecting the grid frequency, for synchronizing to the grid variables. It results in a very robust system response in relation to existing technique based on the phase-angle detection since grid frequency is much more stable variable than the grid voltage/current phase-angle, mainly during grid faults.Type: GrantFiled: November 6, 2007Date of Patent: November 29, 2011Assignee: Gamesa Innovation & Technology, S.L.Inventors: Remus Teodorescu, Pedro Rodriguez
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Publication number: 20110285380Abstract: The present invention relates to a grid monitoring system, in particular a grid monitoring system enabling real-time monitoring of grid variables, e.g. voltage and current, in electrical power systems, such as single or three-phase networks. The grid monitoring system comprises a harmonic detection unit being adapted to subtract harmonics of an input signal before feeding the input signal to a plurality of signal generators in the harmonic detection unit.Type: ApplicationFiled: October 31, 2009Publication date: November 24, 2011Inventors: Pedro Rodriguez, Remus Teodorescu
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Publication number: 20100213925Abstract: This invention deals with an advanced Real-time Grid Monitoring System (RTGMS) suitable for both single-phase and three-phase electric power systems. This invention provides an essential signal processing block to be used as a part of complex systems either focused on supervising and diagnosing power systems or devoted to control power processors interacting with the grid. This invention is based on a new algorithm very suitable for real-time characterization of the grid variables under distorted and unbalanced grid conditions. The main characteristic of this invention is the usage of a frequency-locked loop, based on detecting the grid frequency, for synchronizing to the grid variables. It results in a very robust system response in relation to existing technique based on the phase-angle detection since grid frequency is much more stable variable than the grid voltage/current phase-angle, mainly during grid faults.Type: ApplicationFiled: November 6, 2007Publication date: August 26, 2010Applicant: GAMESA INNOVATION & TECHNOLOGY, S.L.Inventors: Remus Teodorescu, Pedro Rodriguez