Visualization of Wide Area Dynamics in Power Network for Oscillatory Stability Assessment

Abstract

Many countries around the world had suffered blackout incidents due to inter-area oscillations in recent decades. Analysis of system wide oscillatory stability requires a more effective engineering tool for modeling the wide area dynamics in power network. This paper proposes a data visualization based method for assessing the wide area power oscillatory stability. The phasor measurements are used and estimated to obtain more real-time system operating data by using a linear state estimator. The phasor data are then used as the input data for visualizing wide area dynamics. Several visualization modules for displaying the phased angle dynamics are discussed and implemented. Test results of application of the proposed method to an inter-area oscillation event are reported. Sensitivity of the performance of the proposed visualization modules to different system sizes is illustrated.