Facts-based stabilizers for power system stability enhancement

The objective of this thesis is to investigate the power system stability enhancement via power system stabilizers (PSSs) and Flexible AC Transmission System (FACTS) based controllers. This study includes possible coordination between PSSs and FACTS-based controllers. The different proposed FACTS-Based stabilizers recently reported in the literature are discussed. The design problem of PSS and FACTS controller is formulated as an optimization problem. The particle swarm optimization (PSO) algorithm is employed to search for optimal controller's parameters. In addition, this study is presented a singular value decomposition (SVD) based approach to assess and measure the controllability of the poorly damped electromechanical modes by different inputs. The nonlinear time-domain simulation is carried out throughout the thesis to validate the effectiveness of the proposed controllers. The controllers are simulated and tested under different operating conditions.