Multivariable robust control for Organic Rankine Cycle based waste heat recovery systems

Organic Rankine Cycle (ORC) is particularly suitable for the recovery of energy from low-quality heat sources. In this paper, based on robust theory, a multivariable robust controller was designed for an ORC system. This simple-structured and easy-to-realized controller does not require a precise math model. The integral action included in it compensates unknown factors of the plant. The simulation result shows that the proposed control strategy can obtain satisfactory performance in set point tracking ability. Also, the excellent robust performance withstanding the disturbances and dynamical uncertainties are obtained by using the multivariable robust control.