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Fault location in electric power delivery systems

  • US 8,558,551 B2
  • Filed: 06/07/2011
  • Issued: 10/15/2013
  • Est. Priority Date: 04/21/2010
  • Status: Active Grant
First Claim
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1. A system for determining a location of a fault in a radial electric power delivery system with at least two branches, comprising:

  • a first device in electrical communication with the radial electric power delivery system for obtaining power system voltage and current information therefrom and determining whether a fault condition exists thereon; and

    ,a fault locator in communication with the first device, including;

    a receive module for receiving;

    an indication from the first device of a phase-to-phase fault condition on the radial electric power delivery system; and

    ,radial electric power delivery system data including the voltage and current information or a value calculated therefrom from the first device;

    a fault location determination module for determining possible fault locations and creating a list of the possible fault locations using;

    the radial electric power delivery system data from the first device;

    physical parameters of the radial electric power delivery system; and

    ,a calculated reactance to the fault calculated without using positive-sequence current.

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