Rapid tracking of bus voltages using synchro-phasor assisted state estimator

State estimation has a key role in secure operation of power systems and management of power markets. It calculates the optimal estimates of the system states using the available measurements. Increasing number of phasor measurement units (PMU) installed in power systems motivated their integration also into state estimators which so far relied solely on SCADA measurements. However, different refresh rates of PMU and SCADA measurements present a challenge in their efficient integration. This paper proposes a computationally efficient state estimator, which is based on least absolute value (LAV) estimator, to handle multiple PMU measurements received in between two consecutive SCADA measurements in the presence of a limited number of PMUs.