Due to the development of power electronic devices, the DC microgrids are competing AC microgrids, and even in some areas, such as efficiency, reliability, stability, DC microgrids are superior. In spite of mentioned advantages, the main technical challenge related to operation of the DC microgrids is to provide a fast and stable voltage regulation. In this paper, a robust control structure is proposed for multi-bus DC microgrids. Adopting master–slave control strategy, an adaptive voltage control scheme is proposed to robustly maintain the master unit voltage at the nominal value. In addition, an adaptive current controller is designed to robustly regulate the current of all the DG units in the grid-connected mode, as well as the slave units in the islanded mode of operation. All of the controllers are designed based on local measurements and are independent with respect to parameters, dynamic, and topology of the DCMG loads. The control scheme is shown to be stable and robust subject to parametric uncertainties and various types of disturbances. The consistent and effectiveness of the proposed control scheme is demonstrated through simulation studies in MATLAB ® software environment.

中文翻译：

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基于自适应李雅普诺夫函数法的多母线直流微电网鲁棒控制

由于电力电子设备的发展，直流微电网正在与交流微电网竞争，甚至在效率、可靠性、稳定性等方面，直流微电网更胜一筹。尽管有上述优点，但与直流微电网运行相关的主要技术挑战是提供快速稳定的电压调节。在本文中，针对多母线直流微电网提出了一种鲁棒的控制结构。采用主从控制策略，提出了一种自适应电压控制方案，以稳健地将主单元电压保持在标称值。此外，自适应电流控制器设计用于在并网模式下对所有 DG 机组以及孤岛运行模式下的从属机组的电流进行稳健调节。所有控制器都是基于本地测量设计的，并且与 DCMG 负载的参数、动态和拓扑无关。该控制方案在参数不确定性和各种类型的干扰下表现出稳定和鲁棒性。通过在 MATLAB ® 软件环境中进行仿真研究，证明了所提出的控制方案的一致性和有效性。