Robust solutions for the interaction phenomena between dynamic loads and FACTS controllers

This paper deals with an interaction phenomena between dynamic loads and FACTS controllers in power systems. Different power system configurations have been studied (power system with/without dynamic loads, uncertainty and variation of dynamic load parameters etc.). Two methods have been proposed to solve this problem. The first one, based on sensitivity and residues techniques, takes into account the uncertain character of dynamic loads to compute the most efficient phase compensation for low frequency oscillations damping. The second approach consists of designing a robust damping controller by LMI (linear matrix inequalities) techniques with the aim of guaranteeing a certain degree of stability and performances of the FACTS controller in presence of dynamic loads uncertainties