Impact of Demand Response on Stability Region of Single-Area LFC System with Communication Delay

This paper investigates the impact of dynamic demand response (DR) on the stability region depicted on the controller parameter space of a single-area load frequency control (LFC) system with communication time delays. An effective and simple graphical method is implemented to compute all stabilizing Proportional Integral (PI) controller gains of DR loop for a given time delay. The approach is based on extracting stability region and the stability boundary locus in the PI controller parameter space.