equation based on physical laws. The Kalman filter [2] is a Abstract-Static state estimation in electric power systems is four-step algorithm that consist of the following: 1) Predicting normally accomplished without the use of time-history data. This the future state from inputs, 2) calculating the Kalman gain, 3) paper presents preliminary work on the use of the discrete-time correcting the prediction with new measurements, 4) updating Kalman filter to incorporate time history into the statee corring e predict th new measurements, estimators. Transitional state equations are derived via linearization of the power flow equations. A simplified example using a decoupled real power flow solution demonstrates this
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