Hybrid State Estimation including PMU measurements

State estimator is an important tool to provide a view of real-time power system conditions. Traditional power system state estimators are subjected to important changes because of the extensive application of Phasor Measurement Units (PMU). In this paper hybrid state estimation based on conventional and synchronized measurement is presented. A two-step hybrid state estimation is proposed here. First step is conventional State Estimation (Weighted Least Square) based on conventional measurements. In second step linear state estimator that utilizes both PMU measurements and states of conventional state estimation is used. The methodology was tested on the IEEE 14 bus test system. The proposed state estimation model was compared with conventional state estimation model.