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Systems and methods for classifying power line events

  • US 10,422,833 B2
  • Filed: 06/07/2011
  • Issued: 09/24/2019
  • Est. Priority Date: 06/07/2010
  • Status: Active Grant
First Claim
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1. A computer implemented method for classifying a power line event on a power transmission or distribution system, the method comprising:

  • measuring, by an Intelligent Electronic Device (IED) connected to a power line of the power transmission or distribution system, first, second and third signals on the power line associated with first, second and third phases of a three phase system, respectively;

    sending, by the IED, measured data corresponding to the first, second and third signals measured on the power line to at least one computer processor of a substation of the power transmission or distribution system;

    receiving from the at least one computer processor at least one probable classification for the power line event, wherein the at least one computer processor is configured to;

    determine from the measured data that the power line event has occurred and been cleared;

    estimate from the measured data an estimated residual fault data;

    estimate, using the estimated residual fault data, one or more characteristics of one or more fault clearing devices of the power line that responded to the power line event;

    apply a transformation to the measured data associated with the first, second and third phases to generate a single complex signal;

    isolate from the measured data transient data corresponding to the power line event based on the single complex signal generated by the transformation;

    calculate at least one event feature from the isolated transient data;

    project the at least one event feature onto a lower dimensional component space to obtain a feature vector for the power line event; and

    determine from the feature vector the at least one probable classification for the power line event.

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