Composite Non-Linear Control of Hybrid Energy-Storage System in Electric Vehicle

The underlying circuit control is a key problem of the hybrid energy-storage system (HESS) in electric vehicles (EV). In this paper, a composite non-linear control strategy (CNC) is proposed for the accurate tracking current/voltage of the fully-active HESS by combining the exact feedback linearizat...

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Bibliographic Details
Published in:Energies (Basel) 2022-02, Vol.15 (4), p.1567
Main Authors: Lu, Zhangyu, Zhang, Xizheng
Format: Article
Language:English
Subjects:
Controllers
Coordinate transformations
Design
Electric vehicles
Energy management
Energy resources
Energy storage
exact feedback linearization
Feedback
Feedback linearization
Fuel cells
hybrid energy-storage system
Mathematical models
non-linear
Nonlinear control
Robust control
Sliding mode control
Technology
Variables
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Summary:The underlying circuit control is a key problem of the hybrid energy-storage system (HESS) in electric vehicles (EV). In this paper, a composite non-linear control strategy (CNC) is proposed for the accurate tracking current/voltage of the fully-active HESS by combining the exact feedback linearization method and the sliding mode variable structure control technology. Firstly, by analyzing the circuit characteristics of HESS, the affine non-linear model of fully-active HESS is derived. Then, a rule-based energy management strategy (EMS) is designed to generate the reference current value. Finally, the HESS is linearized by the exact feedback linearization method, and the proposed CNC strategy is developed combined with sliding mode variable structure control technology to ensure fast response, high performance, and robustness. At the same time, the stability proof based on the Lyapunov method is given. Moreover, the performance of the CNC strategy is thoroughly investigated and compared with simulation studies with the traditional PI control and a modified sliding mode control, and its effectiveness under different driving conditions is fully verified.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15041567