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<p>In this paper, we investigate the decentralized adaptive safe voltage-tracking constrained control problem for DC/DC buck converters supplying constant power loads. To deal with significant control difficulties posed by discontinuous reference voltages and strict operational constraints, a novel constrained safe reference voltage generation mechanism that smoothly handles discontinuous transitions is first constructed. Then, through the implementation of improved finite-time prescribed performance functions on filtered errors, output voltage tracking errors are guaranteed to remain within predetermined bounds in finite time, while eliminating singularity issues caused by abrupt reference voltage variations. Building on a simplified adaptive PI control architecture that reduces implementation complexity, we propose a decentralized adaptive safe voltage-tracking constrained control strategy. Stability analysis confirms that the proposed control scheme guarantees the asymptotic stability of the microgrid system and ensures safe voltage-tracking within the conflicted constraints. Finally, simulation results validate the effectiveness of the proposed control strategy.</p>

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Decentralized Adaptive Safe Voltage-Tracking Constrained Control for DC Microgrid Systems with Constant Power Loads

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Lingchen Zhu,
  • Yong Liu,
  • Yongsheng Zhu

摘要

In this paper, we investigate the decentralized adaptive safe voltage-tracking constrained control problem for DC/DC buck converters supplying constant power loads. To deal with significant control difficulties posed by discontinuous reference voltages and strict operational constraints, a novel constrained safe reference voltage generation mechanism that smoothly handles discontinuous transitions is first constructed. Then, through the implementation of improved finite-time prescribed performance functions on filtered errors, output voltage tracking errors are guaranteed to remain within predetermined bounds in finite time, while eliminating singularity issues caused by abrupt reference voltage variations. Building on a simplified adaptive PI control architecture that reduces implementation complexity, we propose a decentralized adaptive safe voltage-tracking constrained control strategy. Stability analysis confirms that the proposed control scheme guarantees the asymptotic stability of the microgrid system and ensures safe voltage-tracking within the conflicted constraints. Finally, simulation results validate the effectiveness of the proposed control strategy.