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Application of an Improved STSMC Method to the Bidirectional DC–DC Converter in Photovoltaic DC Microgrid

Author

Listed:
  • Siyuan Liu

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Xiaona Liu

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Shaojie Jiang

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Zengnan Zhao

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Ning Wang

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Xiaoyu Liang

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Minghui Zhang

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

  • Lihua Wang

    (School of Electronic Information Engineering, Shandong University of Science and Technology, Qingdao 266000, China)

Abstract

In a photovoltaic DC microgrid, the intermittent power supply of the distributed generation and the fluctuation of the load power will cause the instability of the bus voltage. An improved super-twisting sliding mode control method based on the super-twisting algorithm is proposed to solve this problem. In this paper, a bidirectional half-bridge buck–boost converter was selected as the research topic. The proposed control method replaces the sign function with the saturation function to further mitigate the chattering effect. The stability of the proposed control method was proven to be finite-time convergent using the Lyapunov theory control. Compared with PI control, linear sliding mode control, and terminal sliding mode control, the proposed control method reduces the system overshoot by up to 33% and greatly improves the response speed; compared with the traditional super-twisting sliding mode control method, the system overshoot is reduced by 6.8%, and the response speed is increased by 38%. The experimental results show that the proposed control method can reduce the fluctuation range of the bus voltage, shorten the time of bus voltage stability, effectively stabilize the bus voltage of the photovoltaic DC microgrid, and maintain strong robustness.

Suggested Citation

  • Siyuan Liu & Xiaona Liu & Shaojie Jiang & Zengnan Zhao & Ning Wang & Xiaoyu Liang & Minghui Zhang & Lihua Wang, 2022. "Application of an Improved STSMC Method to the Bidirectional DC–DC Converter in Photovoltaic DC Microgrid," Energies, MDPI, vol. 15(5), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1636-:d:755908
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    Citations

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    Cited by:

    1. Albert Sawiński & Piotr Chudzik & Karol Tatar, 2024. "SMC Algorithms in T-Type Bidirectional Power Grid Converter," Energies, MDPI, vol. 17(12), pages 1-19, June.
    2. Rasool Kahani & Mohsin Jamil & M. Tariq Iqbal, 2022. "Direct Model Reference Adaptive Control of a Boost Converter for Voltage Regulation in Microgrids," Energies, MDPI, vol. 15(14), pages 1-19, July.
    3. Ensheng Zhao & Yang Han & Hao Zeng & Luqiao Li & Ping Yang & Congling Wang & Amr S. Zalhaf, 2022. "Accurate Peer-to-Peer Hierarchical Control Method for Hybrid DC Microgrid Clusters," Energies, MDPI, vol. 16(1), pages 1-27, December.

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