Patent ID: 8190379

Claim:
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.