Optimal phase compensation of steam turbine governor for power system stabilization

The usage of governor control has been much emphasized in present deregulated market for optimal use of existing infrastructure. In this context the efficacy of existing steam turbine governor system needs much improvement for power system stabilization. In this work optimal phase compensation of steam turbine governor is proposed to damp electromechanical oscillations in power system for stabilizing power system. The compensation and steam turbine governor parameter are optimized by Salp Swarm Optimization (SSO) algorithm and has been compared with swarm and evolutionary algorithms like DE and PSO. The disturbance considered is step and frequent change in the mechanical input power to generator. Time and frequency response analysis are performed to justify the effect of proposed control action. It was observed that with optimal phase compensation in the turbine governor loop, the electromechanical oscillations can be damped much effectively without affecting voltage control loop.