| Abstract: | An overall simulation model for fuel cell hybrid vehicle (FCHV) power train in parallel configuration using MATLAB/Simulink
programming is constructed in this study. The model runs on power control strategy by using logic-threshold approach, achieved
by the hybrid control unit (HCU) and fuel cell stack number. Using accelerator and decelerator pedal positions deduced from
the driving schedule as the primary input, the simulation implements power flow and distribution under different vehicle operating
modes. The HCU control strategy also incorporates regenerative braking and recharge for battery capacity recovery. Using the
D-optimality method for experiment points selection and sequential quadratic programming (SQP) algorithm for obtaining the
optimal operational parameters, three control threshold variables of HCU and optimal stack cell number are selected for hydrogen
fuel economy under certain driving cycles. The proposed method provides optimized configurations of the FCHV model and the
fuel cell stack, which has the capability in satisfying drive power request while satisfying vehicle driving schedule and
battery state of charge (SOC) recovery with lower fuel consumption. |
