Improving Performance and Efficiency of a Fuelcell Hybrid EV Using New Three-Port DC-DC Converter and Optimized Energy Manegement Strategy

فاقد چكيده فارسي

The strategies of energy management and control of different components of fuel cell hybrid electric vehicles (FCHEVs) powertrain like converters, are the keys to achieve fuel cell hybrid system operation with highperformance, low-energy cost, and high-efficiency. A typical hybrid fuel cell powertrain includes fuel cell stack, dedicated energy storage system, and power converters. Each part of the powertrain has specific properties which should be considered in order to achieve a rise in the entire system efficiency. The optimal distribution of required power between energy sources, efficiency, power profiles changing due to gradual performance degradation of fuel cell, and control of DC-DC converter are some of the most important issues in FCHEVs for achieving to an efficient system. This paper presents an optimal energy management system for a fuel cell hybrid powertrain consists of fuel cell, battery, and ultra-capacitor as the power sources, and a novel three-port bidirectional DC-DC converter which can work in four different modes, which is an efficient cure to all above-mentioned issues. The fuel cell is modeled by Semi-empirial model to consider degradation effects of fuel cell. This optimized system is simulated in MATLAB/SIMULINK software and results are presented.