Patents by Inventor Neethu GEORGE

Neethu GEORGE 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: 20250149874
    Abstract: Fault classification and zone identification in a power transmission system are described. Voltage or current measurements are obtained at a terminal of the transmission line in each of the three phases measured during a fault. Modal transformations are performed on voltage or current measurements to obtain traveling wave signals with reference to each of the three phases. Based on the magnitude of the traveling wave signals the fault is classified.
    Type: Application
    Filed: December 27, 2024
    Publication date: May 8, 2025
    Inventors: OD NAIDU, Neethu GEORGE
  • Publication number: 20250038519
    Abstract: The present disclosure relates to a method for distance protection of a transmission line carrying a plurality of phases for a phase-to-phase-to-ground fault comprising a first phase and a second phase of the plurality of phases as faulted phases in the phase-to-phase-to-ground fault, wherein the first phase is different from the second phase, the method comprising: obtaining a first impedance of a first electrical loop formed by a first phase carried on the transmission line and a ground potential based on a zero-sequence current (S601); obtaining a second impedance of a second electrical loop formed by a second phase carried on the transmission line and a ground potential based on the zero-sequence current (S602); computing an apparent impedance of the transmission line and a ground potential based on the transmission line seen at a first terminal based on the first impedance and the second impedance (S603); and performing the distance protection based on the apparent impedance (S604).
    Type: Application
    Filed: November 4, 2022
    Publication date: January 30, 2025
    Inventors: OD NAIDU, Neethu GEORGE, Sinisa ZUBIC, Zoran GAJIC
  • Publication number: 20240063626
    Abstract: Fault classification and zone identification in a power transmission system are described. Voltage or current measurements are obtained at a terminal of the transmission line in each of the three phases measured during a fault. Modal transformations are performed on voltage or current measurements to obtain traveling wave signals with reference to each of the three phases. Based on the magnitude of the traveling wave signals the fault is classified.
    Type: Application
    Filed: December 22, 2021
    Publication date: February 22, 2024
    Inventors: OD NAIDU, Neethu GEORGE
  • Publication number: 20240044965
    Abstract: Examples of fault location in a power transmission line connecting a first and a second terminal is described. In an example, arrival times of a first peak, a second peak, and a third peak of a travelling wave detected from measurements carried out at the first and second terminals is detected. A rise time associated with the first peak of the travelling wave is calculated. One of a first half and a second half of the power transmission line is identified, as having a fault, based on a comparison of the rise time. One of a first segment, a second segment, a third segment, and a fourth segment of the power transmission line is identified as having the fault. Length of the power transmission line is estimated. The fault location is estimated based on identification of one of the first, second, third, and fourth segments as having the fault.
    Type: Application
    Filed: October 9, 2023
    Publication date: February 8, 2024
    Inventors: OD NAIDU, Preetham Venkat YALLA, Neethu GEORGE
  • Publication number: 20240030696
    Abstract: Techniques for distance protection of a transmission line include determining a fault inception time from a voltage and/or current, determining rate of change sample values indicative of a rate of change of the voltage and/or of a rate of change of the current for at least one sample time that is dependent on the fault inception time, and using the rate of change sample values to generate a phase classifier for fault classification of a zone classifier for faulted zone identification.
    Type: Application
    Filed: April 22, 2022
    Publication date: January 25, 2024
    Inventors: OD NAIDU, Dinesh PATIL, Neethu GEORGE, Vedanta PRADHAN, Suresh MATURU
  • Publication number: 20230324451
    Abstract: Fault location determination in a power transmission system is described. Samples of voltage and current measured are obtained for each phase at a terminal. A first equivalent reactance value based on the samples of voltage and current is calculated. Further, based on the calculated equivalent reactance value a first fault location is determined.
    Type: Application
    Filed: September 16, 2021
    Publication date: October 12, 2023
    Inventors: OD NAIDU, Neethu GEORGE, Preetham Venkat YALLA, Suresh MATURU
  • Publication number: 20230094978
    Abstract: Examples for protecting a power transmission line in response to a fault occurring within a monitored zone in a power transmission system are described. In an example, an occurrence of the fault in at least one phase of the power transmission line may be identified. Thereafter, an actual rate of change of incremental current is calculated based on calculated incremental currents. With the actual rate of change determined, a threshold for rate of change of incremental current is calculated based on calculated incremental voltages, the calculated incremental currents, line parameters, and a zone setting for the monitored zone. Based on comparison of the actual rate of change and the threshold for the rate of change, the fault is determined to have occurred in the monitored zone. Thereafter, a trip signal may be generated for controlling a switching device associated with the power transmission line.
    Type: Application
    Filed: March 1, 2021
    Publication date: March 30, 2023
    Inventors: Neethu GEORGE, OD NAIDU
  • Publication number: 20230083768
    Abstract: Examples of fault location in a power transmission line connecting a first and a second terminal is described. In an example, arrival times of a first peak, a second peak, and a third peak of a travelling wave detected from measurements carried out at the first and second terminals is detected. A rise time associated with the first peak of the travelling wave is calculated. One of a first half and a second half of the power transmission line is identified, as having a fault, based on a comparison of the rise time. One of a first segment, a second segment, a third segment, and a fourth segment of the power transmission line is identified as having the fault. Length of the power transmission line is estimated. The fault location is estimated based on identification of one of the first, second, third, and fourth segments as having the fault.
    Type: Application
    Filed: January 29, 2021
    Publication date: March 16, 2023
    Inventors: OD NAIDU, Preetham Venkat YALLA, Neethu GEORGE
  • Publication number: 20220337050
    Abstract: A device is provided that is suitable for use with a double-circuit power transmission system having a first line and a second line. The device comprises an interface to receive a current measurement for the second line. The device comprises at least one processing module operative to estimate a first zero-sequence current in the first line based on a second zero-sequence current, and determine an apparent impedance based on the estimated first zero-sequence current.
    Type: Application
    Filed: March 22, 2022
    Publication date: October 20, 2022
    Inventors: Neethu GEORGE, OD NAIDU
  • Publication number: 20200408827
    Abstract: The invention provides a method and device for fault section identification in a multi-terminal mixed line. The method comprises obtaining positive sequence voltage and current phasors from measurements of voltages and currents at each terminal of the mixed line. The method further comprises calculating a voltage phasor for each terminal, wherein the calculation of the voltage phasor for a first terminal is performed using at least the voltage and current phasors obtained for one of a second terminal and a third terminal, and the current phasor obtained for the first terminal. Thereafter, the method comprises determining a section of the mixed line having the fault, based on comparison of the calculated and obtained voltage phasors for each terminal. In addition, the method comprises controlling a switching device with a re-trip signal generated based on the determination of the section with the fault.
    Type: Application
    Filed: September 26, 2017
    Publication date: December 31, 2020
    Inventors: Obbalareddi Demudu NAIDU, Neethu GEORGE, Sachin SRIVASTAVA, Swaroop GAJARE
  • Publication number: 20190369156
    Abstract: The invention provides an Intelligent Electronic Device (IED) and a method for locating a fault in a power transmission line with the IED. The method comprises measuring arrival times of a first, second and third peak of a travelling wave, using measurements obtained with one or more measurement equipment connected with the power transmission line. The method further comprises generating two or more initial estimates for the location of the fault, estimating time of initiation of the travelling wave, and estimating an arrival time of the third peak. The estimated arrival time of the third peak is compared with the measured arrival time of the third peak, to select an initial estimate of the two or more initial estimates as the location of the fault.
    Type: Application
    Filed: April 20, 2017
    Publication date: December 5, 2019
    Inventors: Obbalareddi Demudu NAIDU, Neethu GEORGE, Sachin SRIVASTAVA