Wavelet Transform-Based Energy Management Strategy for Fuel Cell/Variable-Structure Super-capacitor Hybrid Power System

In this paper, a wavelet transform-based energy management strategy (EMS) governing fuel cell (FC)/variable-structure super-capacitor (SC) hybrid power system prototype is developed to apply for city bus. The hybrid power system integrates FC as the main power source and the variable-structure SC as the auxiliary power source, where SC modules are connected in series acting as a power supply and in parallel under charging conditions. Wavelet transform EMS is proposed to distribute the demand power into high frequency power and low frequency power. The high frequency power is absorbed by variable-structure SC. Rule-based control is also used to further process the low frequency power, ensuring the output power and the power change rate of FC in a reasonable range. The simulation results show that the variable-structure SC’s energy recovery current is improved 59.4%. At the same time, the output power of FC is less than 120 kW and the maximum power change rate is about 5 kW/s, which demonstrates the proposed EMS with the hybrid system can effectively guarantee the power demand and dynamic response.

[1]  Qingqing Yang,et al.  Battery anti-aging control for a plug-in hybrid electric vehicle with a hierarchical optimization energy management strategy , 2019, Journal of Cleaner Production.

[2]  Iftikhar Ahmad,et al.  Backstepping Sliding Mode Control of FC-UC Based Hybrid Electric Vehicle , 2018, IEEE Access.

[3]  Ya-Xiong Wang,et al.  Modeling and experimental validation of hybrid proton exchange membrane fuel cell/battery system for power management control , 2015 .

[4]  Rayhane Koubaa,et al.  Double layer metaheuristic based energy management strategy for a Fuel Cell/Ultra-Capacitor hybrid electric vehicle , 2017 .

[5]  K. B. Oldham.  A Gouy–Chapman–Stern model of the double layer at a (metal)/(ionic liquid) interface , 2008 .

[6]  J. Valdes,et al.  Assessment of on-site steady electricity generation from hybrid renewable energy systems in Chile , 2019, Applied Energy.

[7]  Iftikhar Ahmad,et al.  Output Voltage Regulation of FC-UC Based Hybrid Electric Vehicle Using Integral Backstepping Control , 2019, IEEE Access.

[8]  Qi Li,et al.  Development of energy management system based on a power sharing strategy for a fuel cell-battery-supercapacitor hybrid tramway , 2015 .

[9]  Olivier Tremblay,et al.  A generic fuel cell model for the simulation of fuel cell vehicles , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.

[10]  Peisong Wang,et al.  Energy optimization of logistics transport vehicle driven by fuel cell hybrid power system , 2019, Energy Conversion and Management.

[11]  Masoud MASIH-TEHRANI,et al.  Wavelet-based power management for hybrid energy storage system , 2019, Journal of Modern Power Systems and Clean Energy.

[12]  Young-Bae Kim,et al.  Power source protection method for hybrid polymer electrolyte membrane fuel cell/lithium-ion battery system , 2017 .

[13]  Ya-Xiong Wang,et al.  Real-time estimation of state-of-charge in lithium-ion batteries using improved central difference transform method , 2020 .