A robust load frequency control of power system with fluctuation of renewable energy sources

A new load frequency control (LFC) using the model predictive control (MPC) technique in the presence of variable wind turbines (WT), uncontrolled variable solar power & thermal power have been presented. The MPC technique has been designed such that the effect of the uncertainty due to governor and turbine parameters variation and variable wind, solar power & load disturbance is reduced. A simplified frequency response model is introduced and physical constraints of the power system are considered. The model has been employed in the MPC structure. Digital simulations for a power system are provided to validate the effectiveness of the proposed scheme. The results show that, with the proposed MPC technique and with participation of renewable energy sources, the system performance is robust to the uncertainties. A performance comparison between the proposed and a conventional integral control scheme is carried out confirming the superiority of the proposed MPC technique in presence of renewable energy sources in power system.