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Fractional-Order Modeling and Analysis of a Variable Structure Hybrid Energy Storage System for EVs

Author

Listed:
  • Jianlin Wang
  • Dan Xu
  • Jiahui Zhou
  • Jinlu Mao

Abstract

Hybrid energy storage system has been widely studied as an important technology for electric vehicles. Since the hybrid energy storage system is a nonlinear and complex system, the modeling of the system and the high-precision nonlinear control strategy are technical difficulties for research. The establishment of a high-precision mathematical model of the hybrid energy storage system is the basis for the study of high-quality nonlinear control algorithms. Fortunately, the theory of fractional calculus can help build accurate mathematical models of hybrid energy storage systems. In order to obtain the high-quality nonlinear control strategy of this complex system, this paper, respectively, carried out fractional-order modeling and analysis on the three basic equivalent working states of the hybrid energy storage system of electric vehicles. Among them, the fractional-order average state space model is carried out for the equivalent Buck and Boost mode. Also, the steady-state analysis of the equivalent Dual-Boost mode is carried out by combining the fractional-order calculus theory with the equivalent small parameter variable method. Finally, the effectiveness and precision of the fractional-order model are proved by simulation and experiment.

Suggested Citation

  • Jianlin Wang & Dan Xu & Jiahui Zhou & Jinlu Mao, 2020. "Fractional-Order Modeling and Analysis of a Variable Structure Hybrid Energy Storage System for EVs," Complexity, Hindawi, vol. 2020, pages 1-10, December.
    • Handle: RePEc:hin:complx:7643812
    DOI: 10.1155/2020/7643812
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