Alternating Direction Method of Multipliers Improved Online Power Management in a Fuel Cell Hybrid Bus

ADMM is an important convex optimization method in solving complex control problems. In fuel cell and battery hybrid vehicles, the power distribution control of fuel cell engine and the battery is critical, which is called energy management. This paper, for the first time, proposed an ADMM-based energy management strategy for a fuel cell hybrid bus. An augmented lagrangian equation and scaled dual form of the system model are established, to satisfy the standard form of ADMM. Algorithms are developed to validate the performance of proposed method under the driving cycles CHTC-HT and C-WTVC. Simulation results show that the ADMM-based energy management approach is able to realize real-time implementation, while maintaining over 95% optimality of hydrogen consumption compared to DP offline results.