Research on Energy Management Method of Fuel Cell Hybrid Power System Based on Improved Equivalent Hydrogen Consumption

Abstract

Objective Equivalent hydrogen consumption, as a method for optimizing fuel economy, performs poorly in following the state of charge of energy storage systems. Therefore, it is necessary to improve it to achieve dynamic balance of interval state of charge. Method Based on the conventional equivalent hydrogen consumption algorithm, the hydrogen consumption function of the system is optimized. By adding a voltage balance coefficient, it ensures that the supercapacitor will not be overcharged or over-discharged during vehicle operation. Then, through minimization solution, real-time allocation of power to the system is achieved. Result & Conclusion Based on the operational data of virtual-rail trams, the proposed method is validated on a semi-physical simulation platform. Experimental results show that the improved equivalent hydrogen consumption algorithm can achieve energy distribution of hybrid power systems under complex working conditions. The added voltage balance coefficient ensures that the voltage of the supercapacitor at the end of the vehicle interval remains within a reasonable range.

Keywords

• virtual-rail tram
• fuel cell
• hybrid power system
• power management