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Adaptive Sliding-Mode Control in Bus Voltage for an Islanded DC Microgrid

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  • Dan Zhang
  • Jie Wang

Abstract

The control of bus voltage is a crucial task for the stable operation of islanded DC microgrids. To improve the DC bus voltage control dynamics and stability, this paper proposes an adaptive sliding-mode control method based on large-signal model. The sliding-mode control, adaptive observation, and fix-frequency pulse width modulation technology are adopted and combined efficiently, which guarantee stable bus voltage and the constant switching frequency of closed-loop system, regardless of how the parameters vary with the variable constant-power loads and uncertainties. In addition, the reference values can be quickly tracked by the state variables using the proposed method without any additional sensors/hardware circuits. Therefore, this method is beneficial for the scalability and plug-play of the distributed generators and loads within the DC microgrids. The performance of the proposed control method has been successfully verified in simulation.

Suggested Citation

  • Dan Zhang & Jie Wang, 2017. "Adaptive Sliding-Mode Control in Bus Voltage for an Islanded DC Microgrid," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-9, December.
    • Handle: RePEc:hin:jnlmpe:8962086
    DOI: 10.1155/2017/8962086
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