A non-iterative hybrid Dynamic State Estimation scheme utilizing PMU and SCADA measurements

In this paper, a novel hybrid dynamic state estimation technique (NHDSE) has been proposed for estimating power system states which are primarily bus voltage magnitudes and phase angles at each bus. The proposed NHDSE utilizes a suitable linear relationship existing between measurement and states. Thus, the filtering purpose has been resolved through dynamic state estimation (DSE) approach based on linear Kalman filter rather than popularly used Extended Kalman filter (EKF). With the utilization of linear scheme, the proposed approach is iterative free and thus the observation matrix is calculated only once at the beginning. The proposed scheme is compared with conventional EKF based DSE. In order to corroborate the efficacy of the proposed approach, the same has been applied on two IEEE systems i.e. IEEE 14 and 57 bus test system. Obtained results clearly show the efficacy of the proposed scheme.