The Impact of Power-Electronics-Based Load Dynamics on Large-disturbance Voltage Stability

Abstract

This paper establishes a new context where the power-electronics-based\n(PE-based) load, represented by Plug-in Electric Vehicles, dominates the total\nload composition in power systems. The inherent fast dynamics of PE-based load\nmake conventional approaches of voltage stability analysis unsuitable. Under\nthe new context, the mechanism and impacts of voltage instability under large\ndisturbances have been analytically revealed. The Region of Attraction (ROA) of\nthe stable equilibrium point has been estimated through nonlinear dynamical\nsystem theories, which implies a critical clearing time post grid disturbance.\n