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Verifying an accuracy of a state estimation

  • US 8,190,379 B2
  • Filed: 05/06/2008
  • Issued: 05/29/2012
  • Est. Priority Date: 11/08/2005
  • Status: Active Grant
First Claim
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1. A method of verifying an accuracy of a State Estimation (SE) procedure estimating a number of states (x) of an electric power system based on a redundant set of measurements (z) and corresponding errors (v), wherein the states (x) correspond to system quantities at a number of locations of the system, the method comprising:

  • measuring a phasor value (y, y′

    ) of a system quantity at a location of the system;

    comparing the measured phasor value (y, y′

    ) with the estimated state (x) corresponding to the respective system quantity at the location of the phasor measurement;

    measuring two phasor values (y, y′

    ) at two locations of the system and calculating a value of a first dependent system quantity from the two phasor values; and

    comparing said value of the first dependent system quantity with a respective value of a second dependent system quantity calculated from estimated states corresponding to the respective system quantities at the two locations.

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