Patents by Inventor Karthikeya Balladi RAGHUCHANDRA

Karthikeya Balladi RAGHUCHANDRA 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: 11946456
    Abstract: A power plant comprising: a plurality of photovoltaic (PV) modules arranged in a first and a second region of the power plant, wherein the PV modules in the same region are electrically connected with each other and wherein the PV modules of the first region are electrically connected to a local grid of the power plant via a first converter, and the PV modules of the second region are electrically connected to the local grid via a second converter; and a wind turbine generator (WTG) which is arranged such that the WTG is able to cast a shadow over at least one of the PV modules; wherein the first region and the second region extend in a substantially radial direction away from the WTG such that at most one of the two regions is at least partially covered by the shadow of the WTG at any time.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: April 2, 2024
    Assignee: Vestas Wind Systems A/S
    Inventors: Karthikeya Balladi Raghuchandra, Loránd Demsa
  • Patent number: 11936328
    Abstract: The present disclosure relates to a method of controlling operation of wind turbine generators (WTGs) in a hybrid power plant including both WTGs and PV modules. The method includes steps of: monitoring at least one operating parameter for one or more of the WTGs; monitoring at least one operating parameter for one or more of the PV modules; and controlling operation of the WTGs in dependence on the monitored operating parameters in order to control blade shadows cast by the WTGs on the PV modules and thereby optimise the power output of the PV modules, for example by reducing the blade shadow area cast on the PV modules.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: March 19, 2024
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Loránd Demsa, Karthikeya Balladi Raghuchandra, Jacob Jensen
  • Publication number: 20230246446
    Abstract: A grid connected battery storage system comprising two or more DC/AC power converter systems, two or more DC/DC power converters, and two or more DC electrical storage units is disclosed. Each DC/DC power converter has at least one DC electrical storage unit connected thereto, in such a manner that the voltage capability of the storage unit(s) matches the DC voltage level rating of the DC/DC power converter, thereby forming at least one DC block having a voltage capability defined by the voltage capability of the storage unit(s) of the DC block and a DC voltage level rating defined by the DC voltage level rating(s) of the DC/DC power converter(s) . Each DC block is connected to a DC/AC power converter system via a DC bus bar and at least one switch, in such a manner that the DC voltage level ratings of the DC/AC power converter systems match the voltage capability of the DC blocks.
    Type: Application
    Filed: April 29, 2021
    Publication date: August 3, 2023
    Inventors: Karthikeya Balladi RAGHUCHANDRA, Michel Maher Naguib REZKALLA, Lars Christian CHRISTENSEN
  • Patent number: 11611218
    Abstract: Aspects of the present invention relate to controlling a renewable energy power plant comprising a plurality of wind turbine generators (WTG)s and an energy storage system (ESS). A method includes: controlling the plurality of WTGs to stop generating power, and thereby to enter a non-exporting mode of operation of the renewable energy power plant, during which one or more auxiliary systems of the renewable energy power plant are powered to maintain at least one of the plurality of WTGs in a standby state, operable to start generating power upon demand; wherein the one or more auxiliary systems are powered during the non-exporting mode of operation.
    Type: Grant
    Filed: August 4, 2022
    Date of Patent: March 21, 2023
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Karthikeya Balladi Raghuchandra, Chris Damgaard
  • Publication number: 20230054556
    Abstract: Aspects of the present invention relate to controlling a renewable energy power plant comprising a plurality of wind turbine generators (WTG)s and an energy storage system (ESS). A method includes: controlling the plurality of WTGs to stop generating power, and thereby to enter a non-exporting mode of operation of the renewable energy power plant, during which one or more auxiliary systems of the renewable energy power plant are powered to maintain at least one of the plurality of WTGs in a standby state, operable to start generating power upon demand; wherein the one or more auxiliary systems are powered during the non-exporting mode of operation.
    Type: Application
    Filed: August 4, 2022
    Publication date: February 23, 2023
    Inventors: Karthikeya Balladi Raghuchandra, Chris Damgaard
  • Publication number: 20220340034
    Abstract: A method for controlling charging of at least one electrical storage device is disclosed. Information regarding a power grid and the at least one electrical storage device is used by an aggregator to derive a weighted distribution of virtual inertia response and fast frequency response to be provided to the power grid by the electrical storage devices. A total power available for charging the at least one electrical storage device is derived in accordance with the weighted distribution by a charging controller. An active power setpoint is derived for each of the at least one electrical storage device on the basis of at least (i) the total available power and (ii) the information regarding the at least one electrical storage device. Finally, a charging state of each of the at least one electrical storage device is controlled based on the derived active power setpoint.
    Type: Application
    Filed: May 18, 2020
    Publication date: October 27, 2022
    Inventors: Michel Maher Naguib REZKALLA, Karthikeya Balladi RAGHUCHANDRA
  • Publication number: 20220077813
    Abstract: Embodiments herein describe optimizations for hybrid power plants that include wind turbine generators and photovoltaic generators by determining solar tracking setpoints for a field of photovoltaic generators co-located with a wind turbine generator, wherein the solar tracking setpoints orient a collector face for each photovoltaic generator sunward; in response to determining based on data received from the wind turbine generator that an airborne impactor event is occurring, adjusting the solar tracking setpoints to reposition the collector face out of a trajectory for airborne impactors; and transmitting the setpoints to tracking motors for the photovoltaic generators of the field.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 10, 2022
    Inventors: Karthikeya Balladi RAGHUCHANDRA, Loránd DEMSA
  • Publication number: 20210317820
    Abstract: A power plant comprising: a plurality of photovoltaic (PV) modules arranged in a first and a second region of the power plant, wherein the PV modules in the same region are electrically connected with each other and wherein the PV modules of the first region are electrically connected to a local grid of the power plant via a first converter, and the PV modules of the second region are electrically connected to the local grid via a second converter; and a wind turbine generator (WTG) which is arranged such that the WTG is able to cast a shadow over at least one of the PV modules; wherein the first region and the second region extend in a substantially radial direction away from the WTG such that at most one of the two regions is at least partially covered by the shadow of the WTG at any time.
    Type: Application
    Filed: August 8, 2019
    Publication date: October 14, 2021
    Inventors: Karthikeya Balladi RAGHUCHANDRA, Lorárid DEMSA
  • Publication number: 20210194408
    Abstract: The present disclosure relates to a method of controlling operation of wind turbine generators (WTGs) in a hybrid power plant including both WTGs and PV modules. The method includes steps of: monitoring at least one operating parameter for one or more of the WTGs; monitoring at least one operating parameter for one or more of the PV modules; and controlling operation of the WTGs in dependence on the monitored operating parameters in order to control blade shadows cast by the WTGs on the PV modules and thereby optimise the power output of the PV modules, for example by reducing the blade shadow area cast on the PV modules.
    Type: Application
    Filed: August 14, 2019
    Publication date: June 24, 2021
    Inventors: Loránd DEMSA, Karthikeya Balladi RAGHUCHANDRA, Jacob JENSEN