Title :
On the accuracy of state estimation
Author :
Lefebvre, Serge ; Prévost, Jacques ; Horisberger, Hans ; Lambert, Bertrand
Author_Institution :
Institut de Recherche d´´Hydro-Quebec, Varennes, Que.
Abstract :
This paper illustrates a weakness of state estimation in regard of modeling errors. The Q-V model is in general much more complex than the P-delta model, and Q-V solutions can be badly affected by relatively small modeling errors even when its P-delta part is accurate. The paper analyses the impact of model inaccuracies and measurement bias on the solutions. Solution algorithms examined are least-squares, a modification of it called DWLS, and Huber
Keywords :
least squares approximations; power system state estimation; DWLS; Huber; P-delta model; Q-V model; least-squares algorithm; state estimation; Covariance matrix; Jacobian matrices; Noise measurement; Power generation; Power measurement; Power system modeling; Reactive power; Robust stability; State estimation; Voltage; State estimation; power system modeling; reactive power; robustness;
Conference_Titel :
Power Engineering Society General Meeting, 2006. IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0493-2
DOI :
10.1109/PES.2006.1709163
