Comparison of Classical PID and Modern H∞-Control Concepts for Frequency and Voltage Control of Power Plants

Abstract This contribution investigates classical and modern control concepts for frequency and voltage control of power plants. Based on 5 linearized models for different grid sizes and load situations optimal PID and H ∞ controllers have been designed. The overall control performance is compared for frequency step disturbances injected due to load variations. As demonstrated in this paper, the multivariable H ∞ controller shows superior performance with respect to settling time, rise time and damping of oscillations.