Pulse catching
AssigneeS&C Electric Company
InventorsStephen E. Williams, Martin T. Bishop, Michael John Meisinger, SR.
Life of this patent
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Abstract
A device having a pulse catching function for detecting fault test pulses in an electrical power distribution network in response to a fault. The device includes one or more sensors for measuring current and/or voltage, where the device detects the pulses by loss of voltage followed by identifying one or more of a peak current magnitude of the pulses being greater than a predetermined current value, a pulse duration of the pulses being greater than a predetermined time, a predetermined interval between consecutive pulses and a presence of a pulse/inverse pulse sequence.
Claims9
A device for detecting fault test pulses in an electrical power distribution network, comprising:
- one or more sensors configured to measure current and/or voltage on a feeder;
- a controller operatively coupled to the sensors and configured to detect pulses by identifying at least one of:
- a peak current magnitude of the pulses exceeding a predetermined threshold;
- a pulse duration exceeding a predetermined time interval;
- a predetermined interval between consecutive pulses;
- and
- a presence of a pulse/inverse pulse sequence;
- wherein the controller is further configured to detect the pulses following a loss of voltage on the feeder.
A fault detection and isolation system for an electrical power distribution network, comprising:
- a feeder configured to distribute medium voltage power;
- a power source electrically coupled to the feeder;
- a recloser electrically coupled to the feeder and configured to:
- detect fault current;
- interrupt current flow in response to the fault;
- and
- perform a pulse testing process to determine fault persistence;
- a device having a pulse catching function electrically coupled to the feeder and positioned downstream of the recloser, the device comprising:
- one or more sensors configured to measure current and/or voltage;
- a controller configured to detect pulses generated by the pulse testing process based on one or more of:
- peak current magnitude;
- pulse duration;
- interval between consecutive pulses;
- and
- presence of a pulse/inverse pulse sequence;
- wherein the device is further configured to initiate fault isolation actions based on pulse detection.
Dependencies are inferred from the claim text.