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Hybrid passivity-based control for stability and robustness enhancement in DC microgrids with constant power loads

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Abstract

In a DC microgrid, the negative dam** characteristics of a constant power load can deteriorate the stability of the whole system. To improve the robustness and stability of the DC microgrid, a hybrid passivity-based control of dam** injection is presented in this paper. The stability of the closed-loop system is ensured by the energy dissipation property of the passivity-based control. A proportional-integral controller is integrated with the passivity-based controller to form a hybrid passivity-based control to improve control robustness. A small-signal model of a DC power system with constant power load is derived in detail, and the stability of the system is analyzed with the Lyapunov eigenvalue method. The proposed hybrid passivity-based control provides the system with a faster recovery and a larger power boundary when compared with the typical voltage-current dual-loop control. First, the proposed control is verified by simulation of the DC power system based on MATLAB/Simulink, and the feasibility and superiority of the proposed control are further verified by hardware-in-loop (HIL) experiments based on real-time laboratory (RT-Lab) and a TI DSP TMS320 F28335.

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Funding

Natural Science Foundation of Shandong Province, ZR2018MEE037, Yubin Wang.

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Authors and Affiliations

  1. School of Electrical Engineering, Shandong University, **an, Shandong, China

    Qihong **an, Yubin Wang, Fan Wang, Ruixin Li & Song Wang

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  1. Qihong **an
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  2. Yubin Wang
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  3. Fan Wang
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  4. Ruixin Li
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Correspondence to Yubin Wang.

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**an, Q., Wang, Y., Wang, F. et al. Hybrid passivity-based control for stability and robustness enhancement in DC microgrids with constant power loads. J. Power Electron. 23, 296–307 (2023). https://doi.org/10.1007/s43236-022-00529-4

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  • DOI: https://doi.org/10.1007/s43236-022-00529-4

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