Hierarchical MPC of Hybrid Power Systems based on Fuzzy Discrete Abstraction

A hierarchical control approach is proposed for hybrid systems with discrete-valued input based on fuzzy discrete abstraction and model predictive control (MPC) scheme. The system is firstly abstracted to a discrete event system (DES). Then a higher-level supervisor is designed to provide the control input alphabet for each discrete state, while a fuzzy model predictive controller is developed for the original system in the lower level. Simulation results of emergency frequency control of electric power systems are provided to show the superior frequency recovery characteristic of the proposed hierarchical control scheme in comparison with two existing control methods