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Research Of Hybrid Energy Storage System Application On Electric Vehicles

Posted on:2017-05-30Degree:MasterType:Thesis
Country:ChinaCandidate:W ShiFull Text:PDF
GTID:2322330503492852Subject:Power engineering
Abstract/Summary:PDF Full Text Request
The development of electric vehicles is one of the significant ways to ensure national energy security and reduce environmental pollution. However, the high cost and the short lifetime for vehicle application is still a barrier. In order to alleviate this problem, the Hybrid Energy Storage System(HESS) is used for electric vehicle in this text. Super-capacitor is designed as the auxiliary energy source in HESS which provides high-power output and stores the regenerative braking energy. It will improve the vehicle energy efficiency and lengthen the endurance mileage by using HESS in electric vehicle application.First, the key parameters of the automobile power system are matched by the desired dynamic performance. The electric vehicle model is built in AVL-CRUISE software. The dynamic and economic performance is calibrated to meet the standard of the test vehicle. Urban driving cycle is defined by experimental d ata and the regenerative braking condition is analyzed to obtain the braking power data etc which lays a solid foundation for further research.Then, on the basis of the simulation model mentioned above, the electric vehicle model using HESS is established. The power of the super-capacitor is calculated based on the maximum driving power. Logic Threshold Control Strategy is designed to distribute the peak power of the motor. After the simulation experiment, results show that the super-capacitor can make distinct influence in reducing electric power consumption and improving braking recovery.Finally, the energy management strategy of HESS is researched and presented based on the Fuzzy Logic Control(FLC). The Fuzzy Logic Controller is established in MATLAB/SIMULINK to co-simulate with AVL-CRUISE. FTP75, NEDC and Urban driving cycle are simulated to analysis the effect of FLC control strategy by endurance mileage, electric consumption per hundred kilometers and braking energy recovery. Result shows FLC has the best experimental data in Urban Driving C ycle. In which condition, the endurance mileage is 189 km. The electric consumption per hundred kilometers is 13.2kwh and the braking energy recovery is 34.1%. Meanwhile the energy management stra tegy using FLC can distribute the power of energy sources reasonably and decrease the charging and discharging current of the battery. Accordingly the lifetime of the battery, dynamic performance and the fuel economy are developed.
Keywords/Search Tags:Electric Vehicle, Hybrid Energy Storage System, Super-Capacitor, Energy Management, Fuzzy Logic Control, Regenerative Braking Energy
PDF Full Text Request
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