Hybrid energy storage bidirectional DC–DC converter based on Hermite interpolation and linear active disturbance rejection control

Hao Zheng; Guiping Du; Yanxiong Lei; Ruijing Wang

Hybrid energy storage bidirectional DC–DC converter based on Hermite interpolation and linear active disturbance rejection control

Vol. 23, No. 6, pp. 959-971, Jun. 2023

10.1007/s43236-023-00602-6

Hybrid energy storage system

Bidirectional DC–DC converter

Hermite interpolation

Linear active disturbance rejection control

Abstract

The steady and transient performance of a bidirectional DC–DC converter (BDC) is the key to regulating bus voltage and maintaining power balance in a hybrid energy storage system. In this study, the state of charge of the energy storage element (ESE) is used to calculate the converter current control coefficient (CCCC) via Hermite interpolation. Moreover, the charging and discharging currents of the BDC are controlled by the CCCC. Thus, the ESE runs in the best working region. The linear active disturbance rejection control is used in the current inner loop of BDC to solve the problems of slow dynamic response and parameter tuning in traditional PI control. The method can deal with the great transient response and a vast range of uncertainties, improve the BDC response speed by more than 20%, compensate for the unbalanced power timely, reduce the bus voltage fluctuation, and enhance the disturbance immunity of the system. The proposed method is verified by simulations and experiments.

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Cite this article

[IEEE Style]

H. Zheng, G. Du, Y. Lei, R. Wang, "Hybrid energy storage bidirectional DC–DC converter based on Hermite interpolation and linear active disturbance rejection control," Journal of Power Electronics, vol. 23, no. 6, pp. 959-971, 2023. DOI: 10.1007/s43236-023-00602-6.

[ACM Style]

Hao Zheng, Guiping Du, Yanxiong Lei, and Ruijing Wang. 2023. Hybrid energy storage bidirectional DC–DC converter based on Hermite interpolation and linear active disturbance rejection control. Journal of Power Electronics, 23, 6, (2023), 959-971. DOI: 10.1007/s43236-023-00602-6.