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US 12,620,797 B2Granted
Computer-implemented method of power line protection, intelligent electronic device and electric power system
AssigneeHitachi Energy Ltd
InventorsOd Naidu, Dinesh Patil, Neethu George, Vedanta Pradhan, Suresh Maturu
Life of this patent
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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.
Claims18
A computer-implemented method comprising:
- computing features for use in generating a decision logic operative to generate a signal operative for use with a power system, wherein computing the features comprises
- determining a fault inception time from at least one electric characteristics of data sampled for a given type of power system, and
- determining rate of change values indicative of a rate of change of the at least one electric characteristics for at least one sample time, the at least one sample time being dependent on the fault inception time;
- using the features to generate the decision logic, wherein using the features to generate the decision logic comprises performing a machine learning (ML) model training using the computed features to generate one or both of a phase classifier and a zone classifier, wherein the phase classifier receives rates of change of voltages for three phases and rates of change of currents for the three phases as inputs and outputs a fault type, and/or wherein the zone classifier receives rates of change of voltages for three phases and rates of change of currents for the three phases as inputs and outputs a zone;
- and
- deploying the decision logic to an intelligent electronic device (IED) to generate the signal.
3 more elements
A computer-implemented method comprising:
- computing features for use in generating a decision logic operative to generate a signal operative for use with a power system, wherein computing the features comprises
- determining a fault inception time from at least one electric characteristics of data sampled for a given type of power system, wherein the fault inception time is identified as earlier one of
- a time at which a modulus of a deviation of a voltage from a sliding window moving average of the voltage reaches or exceeds a phase-specific voltage threshold and
- a time at which a modulus of a deviation of a current from a sliding window moving average of the current reaches or exceeds a phase-specific current threshold, and
- determining rate of change values indicative of a rate of change of the at least one electric characteristics for at least one sample time, the at least one sample time being dependent on the fault inception time;
- using the features to generate the decision logic;
- and
- deploying the decision logic to an intelligent electronic device (IED) to generate the signal.
5 more elements
A computer-implemented method comprising:
- computing features for use in generating a decision logic operative to generate a signal operative for use with a power system, wherein computing the features comprises
- determining a fault inception time from at least one electric characteristics of data sampled for a given type of power system, wherein determining the fault inception time comprises determining a sliding window moving average and comparing a modulus of a deviation of the at least one electric characteristic from the sliding window moving average to at least one threshold, and
- determining rate of change values indicative of a rate of change of the at least one electric characteristics for at least one sample time, the at least one sample time being dependent on the fault inception time;
- using the features to generate the decision logic;
- and
- deploying the decision logic to an intelligent electronic device (IED) to generate the signal.
3 more elements
Dependencies are inferred from the claim text.