Patents by Inventor Krishnanjan Gubba Ravikumar

Krishnanjan Gubba Ravikumar 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).

  • Publication number: 20190252886
    Abstract: The present disclosure provides systems and methods for managing an electric power delivery system. The systems and methods may limit generated power of the power delivery system from surpassing a load demand, in order to avoid system instability. The systems and methods may receive an excess generation value and manage generators to runback and/or shed to maintain excess generation below a threshold. The systems and methods may determine a plurality of generator groups for runback. The runback capacity of the generators may be compared against the excess generation. If the excess generation is not greater than the runback capacity, the systems and methods may select generator groups until the runback capacity of the selected groups is greater than the excess generation, and may runback those generators according to runback set points. The unselected generators may continue normal operation to be available for another runback request.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 15, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Benjamin E. Armstrong, Maaz Syed Muhammad Kazmi
  • Publication number: 20190252883
    Abstract: The present disclosure describes load shedding management systems and methods. A load shedding management system may simulate multiple load shedding actions. Based on the simulations the load shedding management system may select a load shedding action. The load shedding management system may send a signal to trip a set of breakers to implement the load shedding action.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 15, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson, Benjamin E. Armstrong
  • Patent number: 10381835
    Abstract: The present disclosure provides systems and methods for managing an electric power delivery system. The systems and methods may limit generated power of the power delivery system from surpassing a load demand, in order to avoid system instability. The systems and methods may receive an excess generation value and manage generators to runback and/or shed to maintain excess generation below a threshold. The systems and methods may determine a plurality of generator groups for runback. The runback capacity of the generators may be compared against the excess generation. If the excess generation is not greater than the runback capacity, the systems and methods may select generator groups until the runback capacity of the selected groups is greater than the excess generation, and may runback those generators according to runback set points. The unselected generators may continue normal operation to be available for another runback request.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: August 13, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Benjamin E. Armstrong, Maaz Syed Muhammad Kazmi
  • Patent number: 10333301
    Abstract: Protective IEDs in an electrical power system, such as distributed controllers, may periodically or in real-time communicate updated protection settings to a wide-area controller, such as a coordination controller, that defines and/or implements a remedial action scheme to protect the electrical power system. The wide-area controller may utilize real-time protection setting information from a plurality of protective IEDs to perform dynamic transient model simulations based on (1) the current topology of the power system, (2) real-time measurements from the system, and (3) the updated, real-time protection settings of various IEDs within the system. The results of the updated transient model simulations may be used to dynamically adjust the remedial actions scheme of the wide-area controller.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: June 25, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Krishnanjan Gubba Ravikumar
  • Publication number: 20180323611
    Abstract: Protective IEDs in an electrical power system, such as distributed controllers, may periodically or in real-time communicate updated protection settings to a wide-area controller, such as a coordination controller, that defines and/or implements a remedial action scheme to protect the electrical power system. The wide-area controller may utilize real-time protection setting information from a plurality of protective IEDs to perform dynamic transient model simulations based on (1) the current topology of the power system, (2) real-time measurements from the system, and (3) the updated, real-time protection settings of various IEDs within the system. The results of the updated transient model simulations may be used to dynamically adjust the remedial actions scheme of the wide-area controller.
    Type: Application
    Filed: May 4, 2017
    Publication date: November 8, 2018
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventor: Krishnanjan Gubba Ravikumar
  • Publication number: 20180316175
    Abstract: A system for determining a disturbance in an electrical power delivery system external to a distributed site based on rate of change of frequency and power flow at the distributed site. The system may open a breaker to isolate the distributed site from the electric power delivery system upon detection of a disturbance external to the distributed site.
    Type: Application
    Filed: May 1, 2018
    Publication date: November 1, 2018
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Ashish Upreti
  • Patent number: 9912158
    Abstract: The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem configured to communicate via a network. The communication system may receive a first plurality of time-stamped electrical parameter measurements associated with a first electrical generator. A measurement analysis subsystem may detect a change caused by an event in the measurements associated with the first electrical generator, and may detect a change in a second plurality of time-stamped electrical parameter measurements associated with a second electrical generator. A magnitude of the event may be determined based on the first and second plurality of time-stamped electrical parameter measurements.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: March 6, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson, Sai Krishna Raghupathula
  • Patent number: 9906041
    Abstract: The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem to obtain a first plurality of time-stamped electrical parameter measurements from a first node. A measurement analysis subsystem may compare the first plurality of time-stamped electrical parameter measurements and the second plurality of time-stamped electrical parameter measurements. The first node and the second node may be associated in an electrical island by a topology detection subsystem based on the correlation. A control subsystem may be configured to implement a control action based on the association of the first node and the second node in the electrical island.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: February 27, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson, Sai Krishna Raghupathula
  • Patent number: 9798342
    Abstract: Disclosed herein are methods for detecting and correcting a fault induced delayed voltage recovery event in an electric power transmission and distribution system. In some embodiments, a fault detection subsystem may receive an indication of a fault in the electric power transmission and distribution system. The system may also include a load analysis subsystem to analyze a plurality of loads supplied by the electric power system and to generate an estimated response of the loads. A fault analysis subsystem may analyze a plurality of factors relating to the fault and to determine a probability of the fault generating a fault induced delayed voltage recovery event. A control system may then implement a control strategy within a control window following the fault based on the probability of the fault generating a fault induced delayed voltage recovery event and the estimated response of the at least one load.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: October 24, 2017
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson
  • Publication number: 20170271872
    Abstract: The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem configured to communicate via a network. The communication system may receive a first plurality of time-stamped electrical parameter measurements associated with a first electrical generator. A measurement analysis subsystem may detect a change caused by an event in the measurements associated with the first electrical generator, and may detect a change in a second plurality of time-stamped electrical parameter measurements associated with a second electrical generator. A magnitude of the event may be determined based on the first and second plurality of time-stamped electrical parameter measurements.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson, Sai Krishna Raghupathula
  • Publication number: 20170271882
    Abstract: The present disclosure pertains to distributed controllers configured to control a plurality of electrical generators in an electrical generation and distribution system. In one embodiment, a distributed controller consistent with the present disclosure may include a communication subsystem to obtain a first plurality of time-stamped electrical parameter measurements from a first node. A measurement analysis subsystem may compare the first plurality of time-stamped electrical parameter measurements and the second plurality of time-stamped electrical parameter measurements. The first node and the second node may be associated in an electrical island by a topology detection subsystem based on the correlation. A control subsystem may be configured to implement a control action based on the association of the first node and the second node in the electrical island.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson, Sai Krishna Raghupathula
  • Publication number: 20170108542
    Abstract: The present application discloses systems and methods to determine loss of at least one electric power transmission line in an electric power transmission system. In various embodiments, a system consistent with the present disclosure may include an electrical parameter monitoring subsystem configured to receive electrical parameter measurements and to determine a change of the electrical measurements. An analysis subsystem may determine whether a change in the electrical measurements is indicative of loss of at least one transmission line and may calculate a number of transmission lines lost based on the change. In some embodiments, a remedial action subsystem may be configured to implement a remedial action in response to loss of at least one transmission line. The number of transmission lines lost may be determined based on an angle difference ratio and a power ratio between two buses in electrical transmission system.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Ashish Upreti, Bharath Nayak, Yusuf Zafer Korkmaz
  • Patent number: 9568516
    Abstract: The present application discloses systems and methods to determine loss of at least one electric power transmission line in an electric power transmission system. In various embodiments, a system consistent with the present disclosure may include an electrical parameter monitoring subsystem configured to receive electrical parameter measurements and to determine a change of the electrical measurements. An analysis subsystem may determine whether a change in the electrical measurements is indicative of loss of at least one transmission line and may calculate a number of transmission lines lost based on the change. In some embodiments, a remedial action subsystem may be configured to implement a remedial action in response to loss of at least one transmission line. The number of transmission lines lost may be determined based on an angle difference ratio and a power ratio between two buses in electrical transmission system.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: February 14, 2017
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Krishnanjan Gubba Ravikumar, Ashish Upreti, Bharath Nayak, Yusuf Zafer Korkmaz
  • Publication number: 20160246666
    Abstract: Disclosed herein are methods for detecting and correcting a fault induced delayed voltage recovery event in an electric power transmission and distribution system. In some embodiments, a fault detection subsystem may receive an indication of a fault in the electric power transmission and distribution system. The system may also include a load analysis subsystem to analyze a plurality of loads supplied by the electric power system and to generate an estimated response of the loads. A fault analysis subsystem may analyze a plurality of factors relating to the fault and to determine a probability of the fault generating a fault induced delayed voltage recovery event. A control system may then implement a control strategy within a control window following the fault based on the probability of the fault generating a fault induced delayed voltage recovery event and the estimated response of the at least one load.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 25, 2016
    Inventors: Krishnanjan Gubba Ravikumar, Scott M. Manson
  • Publication number: 20160084893
    Abstract: The present application discloses systems and methods to determine loss of at least one electric power transmission line in an electric power transmission system. In various embodiments, a system consistent with the present disclosure may include an electrical parameter monitoring subsystem configured to receive electrical parameter measurements and to determine a change of the electrical measurements. An analysis subsystem may determine whether a change in the electrical measurements is indicative of loss of at least one transmission line and may calculate a number of transmission lines lost based on the change. In some embodiments, a remedial action subsystem may be configured to implement a remedial action in response to loss of at least one transmission line. The number of transmission lines lost may be determined based on an angle difference ratio and a power ratio between two buses in electrical transmission system.
    Type: Application
    Filed: September 23, 2014
    Publication date: March 24, 2016
    Inventors: Krishnanjan Gubba Ravikumar, Ashish Upreti, Bharath Nayak, Yusuf Zafer Korkmaz