A CHAOTIC OPTIMIZATION ALGORITHM TO OUTPUT FEEDBACK DAMPING CONTROLLER DESIGN FOR A STATCOM

This paper presents a novel strategy for output feedback damping controller design of the static synchronous compensator (STATCOM) using chaotic optimization algorithm (COA). The design of output feedback controller is formulated as an optimization problem according to the eigenvalue based multiobjective function which is solved by a COA based on Lozi map. Since chaotic mapping enjoys certainty, ergodicity and the stochastic property, the proposed optimization introduces chaos mapping using Lozi map chaotic sequences which increases its convergence rate and resulting precision. The effectiveness of the output feedback control is demonstrated through eigenvalue analysis, nonlinear time-domain simulation and some performance indices studies in comparison with the phase compensation method based designed lead-lag controller for different operating conditions. The simulation results show that the output feedback damping controller can effectively suppress the low frequency oscillations.