Hev Modeling for a Supervisory Level Power Flow Control Problem

This paper explores the modeling equations underlying a supervisory level power flow control problem for a hybrid electric vehicle (HEV). For a given driving profile, a supervisory controller decides on the power split between the ICE and the battery-electric-motor-generator to achieve optimal performance, e.g., a trade-off between energy usage, driving profile tracking, and drivability constraints. Formulation and solution of such a problem require a supervisory level power flow control model amenable to hybrid optimal control techniques. This paper develops constrained power flow control models for the various HEV subsystems and their interactions, along with a differential equation modeling the HEV’s longitudinal dynamics amenable to recent advances in hybrid optimal control theory.