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Time-domain distance line protection of electric power delivery systems

  • US 10,310,005 B2
  • Filed: 05/31/2018
  • Issued: 06/04/2019
  • Est. Priority Date: 09/18/2015
  • Status: Active Grant
First Claim
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1. A system configured to detect a fault in an electric power delivery system, comprising:

  • a data acquisition subsystem configured to acquire a plurality of time-domain representations of electrical conditions in the electric power delivery system at each of a first terminal and a second terminal;

    an incremental quantities subsystem configured to;

    calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions;

    calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions;

    determine an interval during which the calculated operating quantity exceeds the calculated restraining quantity;

    a fault detector subsystem configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin;

    a protective action subsystem configured to implement a protective action on the electric power delivery system based on the declaration of the fault.

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