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公开(公告)号：US11735907B2
公开(公告)日：2023-08-22
申请号：US17647252
申请日：2022-01-06
发明人： Bogdan Z. Kasztenny
CPC分类号： H02H7/22 , H02H1/0007
摘要： Protection of an electric power delivery system using a traveling wave overcurrent element is disclosed herein. A maximum traveling wave mode among the alpha and beta modes is selected and compared with a traveling wave overcurrent threshold to determine a traveling wave overcurrent. Traveling wave overcurrent protection may be enabled depending on a termination status of the protected electric power delivery system. When a remote terminal is terminated on high surge impedance, a local protection system may use local traveling wave current quantities to determine a traveling wave overcurrent, and the traveling wave overcurrent may be used for line protection. Systems for detecting a termination status use local and remote current quantities.
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公开(公告)号：US20220308103A1
公开(公告)日：2022-09-29
申请号：US17685647
申请日：2022-03-03
发明人： Bogdan Z. Kasztenny
摘要： Distance protection for electric power delivery systems that include an unconventional source is disclosed herein using apparent impedance independent of memory and cross-phase polarizing. The apparent impedance may be compared with an offset distance operating characteristic. Fault direction is determined by using zero-sequence ground directional logic for phase-to-ground faults. For phase-to-phase faults, fault direction is determined using weak-infeed directional logic. Fault direction may further use incremental quantity directional principles. The distance protection may further determine a faulted loop using voltage logic. The distance protection may select between traditional distance protection and the methods described herein based on the current feeding the fault.
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3.发明申请公开(公告)号：US20200350760A1
公开(公告)日：2020-11-05
申请号：US16932240
申请日：2020-07-17
发明人： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Veselin Skendzic , David E. Whitehead
摘要： The present disclosure pertains to systems and methods for detecting faults in an electric power delivery system. In one embodiment, system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions. The system may also include an incremental quantities subsystem configured to calculate an incremental current quantity and an incremental voltage quantity based on the plurality of representations. A fault detection subsystem may be configured to determine a fault type based on the incremental current quantity and the incremental voltage quantity, to select an applicable loop quantity, and to declare a fault based on the applicable loop quantity, the incremental voltage quantity, and the incremental current quantity. A protective action subsystem may implement a protective action based on the declaration of the fault.
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公开(公告)号：US10312041B2
公开(公告)日：2019-06-04
申请号：US15356234
申请日：2016-11-18
发明人： Bogdan Z. Kasztenny
摘要： 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.
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公开(公告)号：US10310005B2
公开(公告)日：2019-06-04
申请号：US15994817
申请日：2018-05-31
发明人： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , David E. Whitehead , Bogdan Z. Kasztenny , Armando Guzman-Casillas , Veselin Skendzic
摘要： 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.
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公开(公告)号：US10302690B2
公开(公告)日：2019-05-28
申请号：US15884707
申请日：2018-01-31
发明人： Edmund O. Schweitzer, III , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Yajian Tong , Mangapathirao Venkata Mynam
摘要： 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.
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公开(公告)号：US20180196100A1
公开(公告)日：2018-07-12
申请号：US15884707
申请日：2018-01-31
发明人： Edmund O. Schweitzer, III , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Yajian Tong , Mangapathirao Venkata Mynam
IPC分类号： G01R31/08
CPC分类号： G01R31/085 , G01R31/11
摘要： 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.
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公开(公告)号：US20180136269A1
公开(公告)日：2018-05-17
申请号：US15806959
申请日：2017-11-08
发明人： Edmund O. Schweitzer, III , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Yajian Tong , Mangapathirao Venkata Mynam
IPC分类号： G01R31/08
CPC分类号： G01R31/085 , G01R31/11
摘要： 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.
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公开(公告)号：US09774388B2
公开(公告)日：2017-09-26
申请号：US15342013
申请日：2016-11-02
IPC分类号： H04B10/032 , H02H7/26 , H04B10/079
CPC分类号： H04B10/032 , H02H7/265 , H04B10/0791
摘要： Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire. Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.
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公开(公告)号：US20170146577A1
公开(公告)日：2017-05-25
申请号：US15356234
申请日：2016-11-18
发明人： Bogdan Z. Kasztenny
摘要： 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.
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