Fault location using traveling waves
First Claim
1. A system configured to detect a fault in an electric power transmission system, the system comprising:
- a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line of the electric power transmission system;
a fault location estimation subsystem configured to;
receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event;
receive from the traveling wave detection subsystem a second plurality of traveling waves generated during the fault, the second plurality of traveling waves generated by the fault;
identify a plurality of matched traveling waves in the first plurality of traveling waves and the second plurality of traveling waves;
align the first plurality of traveling waves and the second plurality of traveling waves based on the plurality of matched traveling waves;
identify an unmatched traveling wave in the second plurality of waves and a time of the unmatched traveling wave;
determine a location of the fault on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line; and
an interface configured issue a command to trip a breaker to clear the fault.
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Accused Products
Abstract
The present disclosure relates to calculating a fault location in an electric power transmission system based on traveling waves. In one embodiment, a system consistent with the present disclosure may be configured to detect a fault in an electric power transmission system. The system may include a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line and a fault location estimation subsystem. The fault location estimation subsystem may receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event. The fault location estimation subsystem may receive from the traveling wave detection subsystem a second plurality of traveling waves generated during an unplanned event. An unmatched traveling wave in the second plurality of waves may be detected and a location of the unplanned event based on the unmatched traveling wave.
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Citations
32 Claims
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1. A system configured to detect a fault in an electric power transmission system, the system comprising:
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a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line of the electric power transmission system; a fault location estimation subsystem configured to; receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event; receive from the traveling wave detection subsystem a second plurality of traveling waves generated during the fault, the second plurality of traveling waves generated by the fault; identify a plurality of matched traveling waves in the first plurality of traveling waves and the second plurality of traveling waves; align the first plurality of traveling waves and the second plurality of traveling waves based on the plurality of matched traveling waves; identify an unmatched traveling wave in the second plurality of waves and a time of the unmatched traveling wave; determine a location of the fault on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line; and an interface configured issue a command to trip a breaker to clear the fault. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system configured to detect a fault in an electric power transmission system, the system comprising:
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a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line of the electric power transmission system;
a fault location estimation subsystem configured to;generate a first record of a plurality of static reflection points on the transmission line; detect a first plurality of traveling waves generated during a fault, the first plurality of traveling waves generated by the fault; identify a subset of the first plurality of traveling waves based on the first record; match the subset of the first plurality of traveling waves with the plurality of static reflection points on the transmission line based on the first record; identify at least one unmatched traveling wave in the first plurality of traveling waves that is unmatched to any of the plurality of static reflection points and a time of the unmatched traveling wave; and identify a location of the fault on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line. - View Dependent Claims (14, 15, 16, 17)
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18. A method of detecting a fault in an electric power transmission system using traveling waves, the method comprising:
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measuring a first plurality of traveling waves on a transmission line of the electric power transmission system generated during a reference event at a first location; storing a representation of the first plurality of traveling waves; detecting a second plurality of traveling waves generated during a fault, the second plurality of traveling waves generated by the fault; identifying a plurality of matched traveling waves in the first plurality of traveling waves and the second plurality of traveling waves; aligning the first plurality of traveling waves and the second plurality of waves based on the plurality of matched traveling waves; identifying an unmatched traveling wave in the second plurality of waves and a time of the unmatched traveling wave; determining a location of the fault on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line; and tripping a breaker to clear the fault. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method of detecting a fault in an electric power transmission system, the method comprising:
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generating a first record of a plurality of static reflection points on a transmission line of the electric power transmission system; detecting a first plurality of traveling waves generated during a first fault, the traveling waves generated by the first fault; identifying a subset of the first plurality of traveling waves based on the first record; matching the subset of the first plurality of traveling waves with the plurality of static reflection points on the transmission line based on the first record; identifying at least one unmatched traveling wave in the first plurality of traveling waves that is unmatched to any of the plurality of static reflection points and a time of the unmatched traveling wave; identifying a location of the unplanned event on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line; and an interface configured issue a command to trip a breaker to clear the fault. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification