Coping with multiple Q-V solutions of the WLS state estimator induced by shunt-parameter errors

Author

Lefebvre, Serge ; Pr?©vost, Jacques ; Horisberger, Hans ; Lambert, Bertrand ; Mili, Lamine

Author_Institution

Inst. de Recherche, Hydro-Quebec, Varennes, Que.

fYear

2004

Firstpage

186

Lastpage

192

Abstract

The paper proposes a new iterative algorithm able to cope with multiple Q-V solutions of the WLS state estimator due to shunt-reactance errors. For such errors, it is shown in a 735/230-kV Hydro-Quebec subsystem that the conventional Gauss-Newton iterative algorithm converges to a strongly biased Q-V solution that is not detected as such by the residual statistical tests. By contrast, under no bad measurements, the new iterative algorithm converges to a solution foreseen by the dispatcher via the inclusion of additive state voltage weights in the gain matrix

Keywords

Newton method; electric reactance; power system parameter estimation; power system state estimation; transmission networks; Gauss-Newton iterative algorithm; Hydro-Quebec subsystem; Q-V solution; WLS state estimator; gain matrix; iterative algorithm; multiple Q-V solution; power system state estimation; shunt parameter error; shunt-reactance error; state voltage weight; topology error; Inductors; Iterative algorithms; Least squares methods; Newton method; Reactive power; Recursive estimation; Shunt (electrical); State estimation; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Probabilistic Methods Applied to Power Systems, 2004 International Conference on

Print_ISBN

0-9761319-1-9

Type

conf

Filename

1378685