An unscented Kalman filter based hybrid state estimator considering conventional and PMU measurements

An unscented Kalman filter based dynamic state estimator (DSE) is described in this paper. The measurements are assumed to be comprising of conventional as well as PMU measurements. Actual or estimated conventional measurements are combined with PMU measurements at each instant of arrival of complete set of PMU measurements, before running the DSE. This enables the execution of the DSE at a faster rate, that is equal to the arrival of PMU measurements. The proposed algorithm is applied on IEEE 14 bus and New England 39 bus test systems.