Visualization of Dynamic Unstable Phenomena in Large-Scale Power System

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Visualization technique of dynamic phenomena and steady-state condition in large-scale power system has been studied in this research.1.P-delta map, V-dalta map, Q-delta map and Q-V-delta map are proposed and their 2D animations are developed, where P and Q are active and reactive power through transmission line respectively and V and delta are magnitude and phase angle of node voltage respectively.2.3D animations of unstable and poorly damped swing phenomena in large-scale power system are developed as shown bellow(1) animation with vertical pole, height of which represents phase angle or angle speed, and horizontal pipe representing transmission line, diameter, color or moving stripe of which represents active power flow(2) animation with balloon, diameter and vertical position of which represent stored energy and phase angle of generator respectively, and pipe between balloon and load node representing active power flow through transmission line(3) animation with vertical pole, height and diameter of which represent node and transmission line respectively and horizontal position of which represents phase angle(4) animation with disk, diameter and rotation of which show magnitude and phase angle of voltage respectively, and elastic strings representing synchronizing power.3.Some oscillatory modes of swing phenomena analized through FFT are represented as 3D animations to help us understand physical meanings of complicated power swing phenomena. As a result, it has been made clear that it becomes easy to understand intuitively where what kinds of oscillatory mode appear by looking at the above 3D animation.4.2D animation is developed to show how coherent generators behave during the period of oscillation in large-scale power system.5.3D animation are developed for voltage instability phenomena in small model system.