Hydropower Plant Load Frequency Control via Second Order Sliding Mode

Super-twisting algorithm, a second order sliding mode control method, is studied for hydropower plant frequency control. Two versions of this algorithm are introduced in this paper. Simulation results from both methods and regular sliding mode control are compared on the basis of system responses and control efforts. We show that the second order sliding mode controller is able to reduce chattering effects associated with regular sliding mode control and preserve the robustness of regular sliding mode control as well.