| US 7,499,816 B2 | ||
| Estimation of real-time power system quantities using time-synchronized measurements | ||
| Ernst Scholtz, Raleigh, N.C. (US); Reynaldo F. Nuqui, Cary, N.C. (US); John D. Finney, Raleigh, N.C. (US); Mats Larsson, Baden (Switzerland); Mani Subramanian, Sugar Land, Tex. (US); and Gordon Lin, Sugar Land, Tex. (US) | ||
| Assigned to ABB Research Ltd., Zurich (Switzerland) | ||
| Filed on Dec. 12, 2006, as Appl. No. 11/609,393. | ||
| Prior Publication US 2008/0140326 A1, Jun. 12, 2008 | ||
| Int. Cl. G06F 3/00 (2006.01) | ||
| U.S. Cl. 702—60 [702/57; 702/64; 702/65] | 38 Claims |
| 1. A method comprising:
obtaining non-phasor measurement data about an electrical power system;
obtaining phasor measurement data about the electrical power system;
estimating a state of the electrical power system directly from both the non-phasor and phasor data using a statistical estimation
algorithm, wherein the estimation is performed in a state-estimator reference frame using phasor measurement data referenced
to a phasor measurement reference frame; and
generating an output indicative of the estimated state.
|