Reconfiguration of flow-based networks with back-up components using robust economic MPC. (February 2023) - Trapiello, Carlos
Abstract: This paper addresses the post-fault selection of an actuators configuration for flow-based networks with back-up components. The proposed reconfiguration methodology consists of an offline and an online phase. On the one hand, an offline analysis looks for the minimal configurations for which the economic cost of the (best) steady-state trajectory that can be achieved using a robust model predictive control (MPC) policy is admissible. On the other hand, at fault detection time, an online search for the best actuators configuration to cope with the transient induced by the fault is conducted in the superset of each minimal configuration calculated offline. With this strategy, the final new configuration is computed by sequentially solving a set of mixed-integer programs whose constraints are derived from single-layer robust MPC schemes coupled with local controllers designed for the a priori minimal configurations identified offline. A portion of a water transport network is used to show the performance the proposed solution. Highlights: Methodology for post-fault actuators configuration selection in flow-based networks. Offline search for confs. with an economically admissible steady-state trajectory. Online selection of the optimal configuration to deal with the fault-induced transient. Simulation results show good performance in a large-scale water transport network.