Patents by Inventor Bogdan Z. Kasztenny

Bogdan Z. Kasztenny 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: 10483747
    Abstract: The present disclosure relates to a fault in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system. A traveling wave detector may be configured to detect a traveling wave event based on the plurality of representations of electrical conditions. A traveling wave directional subsystem may be configured to calculate an energy value of the traveling wave event during an accumulation period based on the detection of the traveling wave by the traveling wave disturbance detector. A maximum and a minimum energy value may be determined during the accumulation period. A fault direction may be determined based on the maximum energy value and the minimum energy value. A fault detector subsystem configured to declare a fault based on the determined fault direction.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: November 19, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Armando Guzman-Casillas, Bogdan Z. Kasztenny, Mangapathirao Venkata Mynam
  • Patent number: 10422827
    Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, a time-domain traveling wave directional subsystem is configured to receive a plurality of current traveling wave and a plurality of voltage traveling wave time-domain representations based on electrical conditions in the electric power delivery system. The plurality of current and voltage traveling wave time-domain representations may be compared to respective minimum thresholds. An integral may be generated based on a product of the plurality of current and voltage traveling wave time-domain representations when the current and voltage traveling wave time-domain representations exceed the minimum thresholds. A sign of the integral may reflect whether the fault is in the forward or reverse direction. A fault detector subsystem configured to declare the fault when the sign reflects that the fault is in the forward direction and the integral exceeds a security margin.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: September 24, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, David E. Whitehead, Bogdan Z. Kasztenny, Armando Guzman-Casillas, Veselin Skendzic
  • Patent number: 10404714
    Abstract: Systems and methods are disclosed that provide for physical access management of an access-controlled area of a distributed site of an electric power delivery system using one or more one or more articulated access control policies. In some embodiments, to authenticate rights to access an access-controlled area, a first user may provide an associated access control system with credentials satisfying first authentication requirements based on an applicable policy. In connection with subsequent access authentication requests, the access control system may accept credentials satisfying second authentication requirements that may be different than the first authentication requirements. In this manner, access control requirements to the access-controlled area may be managed based on an associated articulated policy.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: September 3, 2019
    Inventors: George W. Masters, Kylan T. Robinson, Rhett Smith, Bogdan Z. Kasztenny
  • Publication number: 20190251765
    Abstract: Systems and methods are disclosed that provide for physical access management of an access-controlled area of a distributed site of an electric power delivery system using one or more one or more articulated access control policies. In some embodiments, to authenticate rights to access an access-controlled area, a first user may provide an associated access control system with credentials satisfying first authentication requirements based on an applicable policy. In connection with subsequent access authentication requests, the access control system may accept credentials satisfying second authentication requirements that may be different than the first authentication requirements. In this manner, access control requirements to the access-controlled area may be managed based on an associated articulated policy.
    Type: Application
    Filed: August 11, 2015
    Publication date: August 15, 2019
    Inventors: George W. Masters, Kylan T. Robinson, Rhett Smith, Bogdan Z. Kasztenny
  • Publication number: 20190212382
    Abstract: A single-ended traveling wave fault location estimation is calculated using this disclosure, and a confidence level is determined based on available independent fault location estimations. Hypothesis are calculated based on traveling wave times and values, wherein the values indicate a polarity that is the same as the first received traveling wave. Hypothesis are then compared against results of other fault location estimations, and confidence levels assigned accordingly. The fault location is then calculated and displayed based on the hypothesis and confidence levels.
    Type: Application
    Filed: March 19, 2019
    Publication date: July 11, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Armando Guzman-Casillas, Yajian Tong, Mangapathirao Venkata Mynam, Bogdan Z. Kasztenny
  • Publication number: 20190195918
    Abstract: The present disclosure pertains to systems and methods for detecting traveling waves in electric power delivery systems. In one embodiment, a system comprises a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. A current transformer is disposed between the stack of capacitors and the first ground connection. The current transformer provides an electrical signal corresponding to a current associated with the CCVT. An intelligent electronic device (IED) in electrical communication with the first current measurement device generates a voltage signal based on the electrical signal from the current transformer. The IED detects a traveling wave based on the first voltage signal; and analyzes the traveling wave to detect a fault on the electric power delivery system.
    Type: Application
    Filed: September 20, 2018
    Publication date: June 27, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny, Veselin Skendzic
  • Publication number: 20190187202
    Abstract: A system for accurately determining a location of a fault in an electric power delivery system using traveling waves by compensating for dispersion of the traveling waves. The dispersion may be calculated based on a preliminary fault location determination, and the arrival times of traveling wave peaks may then be corrected using the calculated dispersion. A compensation to the traveling wave propagation speed may be made using a proportionality factor to correct for traveling wave dispersion. Dispersion correction may be a function of fault type or physical power line conditions.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, Armando Guzman-Casillas, Tony J. Lee, Veselin Skendzic, Bogdan Z. Kasztenny, David E. Whitehead
  • Patent number: 10310004
    Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, a time-domain traveling wave differential subsystem is configured to determine at a first terminal a first index between an arrival maximum of a traveling wave generated by a fault at the first terminal and an exit maximum of the traveling wave. The traveling wave subsystem also determines a second index between an arrival maximum of the traveling wave at the second terminal and an exit maximum of the traveling wave. An operating quantity and a restraint quantity may be determined based on a magnitude of the representations of electrical conditions in the first index and the second index. A fault may be declared based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may be configured to implement a protective action based on the declaration of the fault.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: June 4, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, David E. Whitehead, Bogdan Z. Kasztenny, Armando Guzman-Casillas, Veselin Skendzic
  • Patent number: 10310005
    Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem may be configured to calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions. The incremental quantities subsystem may also calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions. An interval during which the calculated operating quantity exceeds the calculated restraining quantity may be determined. A fault detector subsystem may be configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin. A protective action subsystem configured to implement a protective action based on the declaration of the fault.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: June 4, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, David E. Whitehead, Bogdan Z. Kasztenny, Armando Guzman-Casillas, Veselin Skendzic
  • Patent number: 10312041
    Abstract: Disclosed herein are systems and methods for estimating a period and frequency of a waveform. In one embodiment, a system may comprise an input configured to receive a representation of the input waveform. A period determination subsystem may perform an iterative process to determine the variable period of the input waveform. The iterative process may comprise selection of an estimated window length, determination of an autocorrelation value based on the estimated window length, determination of an adjustment value to the window length to identify a maximum of the autocorrelation value; and determination of the variable period based on the window length associated with the maximum of the autocorrelation value. The period determination subsystem may perform the iterative process to track changes in the variable period of the input waveform. A control action subsystem may implement a control action based on the variable period of the input waveform.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 4, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Bogdan Z. Kasztenny
  • Patent number: 10302690
    Abstract: Traveling wave information from a single end of an electric power delivery system is used to determine a fault location on a power line of the electric power delivery system. Hypotheses of which of a plurality of received traveling waves represents a first reflection from the fault are evaluated. A determination of an arrival time of the first reflection from the fault is used to calculate a distance from the single end of the power line to the fault location.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: May 28, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Armando Guzman-Casillas, Bogdan Z. Kasztenny, Yajian Tong, Mangapathirao Venkata Mynam
  • Publication number: 20190157854
    Abstract: An electric power delivery system may be protected upon occurrence of a fault condition by the systems and methods disclosed herein by detecting the fault condition and signaling a protective action before the overcurrent condition reaches the protective equipment. The protective action may be an opening of a circuit breaker or engagement of a fault current limiter. The overcurrent condition may be a non-steady-state condition. The fault may be detected using traveling wave or incremental quantity techniques.
    Type: Application
    Filed: January 29, 2019
    Publication date: May 23, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny, David E. Whitehead
  • Patent number: 10295585
    Abstract: Traveling wave information from a single end of an electric power delivery system is used to determine a fault location on a power line of the electric power delivery system. Hypotheses of which of a plurality of received traveling waves represents a first reflection from the fault are evaluated. A determination of an arrival time of the first reflection from the fault is used to calculate a distance from the single end of the power line to the fault location.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: May 21, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Armando Guzman-Casillas, Bogdan Z. Kasztenny, Yajian Tong, Mangapathirao Venkata Mynam
  • Patent number: 10288688
    Abstract: Protection of an electrical generator includes determining a rotor and stator components using rotor and stator electrical signals, calculating a unbalance and/or differential component using the stator and rotor components, and determining a stator or rotor fault based on the unbalance and/or differential component. Further, the faulted phase and/or zone of a stator fault may be determined using the stator positive sequence voltage and negative sequence current.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: May 14, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bogdan Z. Kasztenny, Normann Fischer, Dale S. Finney, Douglas I. Taylor
  • Publication number: 20190094290
    Abstract: The present disclosure pertains to systems and methods for analyzing traveling waves in an electric power delivery system. In one embodiment, a system may comprise a traveling wave identification subsystem to receive electric power system signals and identify a plurality of incident, reflected, and transmitted traveling waves. A first traveling wave may be selected from the incident and transmitted traveling waves, and a first distortion may be determined. A second traveling wave subsequent to the first traveling wave, may selected from the incident traveling waves and a second distortion may be determined. A traveling wave analysis subsystem may compare the first distortion and the second distortion and determine whether the first distortion is consistent with the second distortion. A protective action subsystem may implement a protective action based on a first determination that the first distortion is consistent with the second distortion.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny
  • Publication number: 20190094292
    Abstract: The present disclosure pertains to systems and methods for monitoring traveling waves in an electric power system. In various embodiments, a data acquisition subsystem may acquire electric power system signals. A traveling wave detection subsystem may detect two or more traveling waves based on the electric power system signals and determine a location of an event triggering the traveling waves. A traveling wave security subsystem may selectively generate a restraining signal based on the location of the event as within a blocking zone. A protection action subsystem may implement a protective action when the location is outside of a blocking zone. In various embodiments, a protective action will not be implemented for traveling waves launched from known locations of switching devices operating normally. Further, protective actions may be restrained if a magnitude of a traveling wave differs from an expected value based on a pre-fault voltage.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny
  • Publication number: 20190094291
    Abstract: The present disclosure pertains to systems and methods to detect faults in electric power delivery systems. In one embodiment, a data acquisition system may acquire a plurality of electric power delivery system signals from an electric power transmission line. A traveling wave system may detect a traveling wave based on the plurality of electric power delivery system signals received from the data acquisition system. The traveling wave may be analyzed using a first mode to determine a first mode arrival time and using a second mode to determine a second mode arrival time. A time difference between the first mode arrival time and the second mode arrival time may be determined. A fault location system may estimate or confirm a location of the fault based on the time difference. A protection action module may implement a protective action based on the location of the fault.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny
  • Patent number: 10236675
    Abstract: An electric power delivery system may be protected upon occurrence of a fault condition by the systems and methods disclosed herein by detecting the fault condition and signaling a protective action before the overcurrent condition reaches the protective equipment. The protective action may be an opening of a circuit breaker or engagement of a fault current limiter. The overcurrent condition may be a non-steady-state condition. The fault may be detected using traveling wave or incremental quantity techniques.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: March 19, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny, David E. Whitehead
  • Publication number: 20190011486
    Abstract: Disclosed herein are systems and methods for estimating a period and frequency of a waveform. In one embodiment a system may comprise an input configured to receive a signal comprising a representation of the waveform. A period determination subsystem may calculate an estimated period of the signal based on a period determination function. An estimated period adjustment subsystem may determine an adjustment to the estimated period based on a result of the period determination function. A quality indicator subsystem configured to evaluate a measurement quality indictor function based on the estimated period, and to selectively update the period of the waveform based on the measurement quality indicator. A control action subsystem configured to implement a control action based on the period of the waveform.
    Type: Application
    Filed: August 28, 2018
    Publication date: January 10, 2019
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bogdan Z. Kasztenny, Tony J. Lee
  • Patent number: 10114052
    Abstract: Disclosed herein are systems and methods for estimating a period and frequency of a waveform. In one embodiment a system may comprise an input configured to receive a signal comprising a representation of the waveform. A period determination subsystem may calculate an estimated period of the signal based on a period determination function. An estimated period adjustment subsystem may determine an adjustment to the estimated period based on a result of the period determination function. A quality indicator subsystem configured to evaluate a measurement quality indictor function based on the estimated period, and to selectively update the period of the waveform based on the measurement quality indicator. A control action subsystem configured to implement a control action based on the period of the waveform.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: October 30, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bogdan Z. Kasztenny, Tony J. Lee