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Power System State Estimation Considering Measurement Dependencies

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3 Author(s)
Caro, E. ; Univ. of Castilla-La Mancha, Ciudad Real, Spain ; Conejo, A.J. ; Minguez, R.

State estimation measurements within a substation are routinely considered Gaussian and independent. In this paper, the questionable independence assumption is dropped and a statistical procedure is proposed to estimate the measurement variance-covariance matrix. The well-known weighted least squares technique for estimation is then modified to take into account measurement dependencies. Two case studies are analyzed and conclusions duly drawn.

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Power Systems, IEEE Transactions on  (Volume:24 ,  Issue: 4 )