HVDC/HVAC system and damping the oscillation by a linear controller based on genetic algorithm

Stabilizing power angle oscillation and torsional oscillation on the turbine-generator shaft using a linear feedback controller is investigated in this paper. In order to analysis the effect of this controller, a single machine connected through two transmission lines (HVAC and HVDC), to an infinite bus is used. To damp and control the oscillations in this system, after any change, a linear feedback controller was employed which is based on the combination of linear quadratic regulator (LQR) control and the genetic algorithm (GA). Genetic algorithm is employed to find the best values for gains of the controller in a very short time with an effective performance. The simulation results show the improvement in the dynamic performance of the test AC/DC system.