Abstract Traditional power generation is in the midst of a major transformation, and renewable based microgrids are playing a key role in this energy structure transition. This paper investigates the design of a centralized nonlinear controller based on the integral terminal and fast integral terminal sliding mode control for hybrid AC/DC microgrid involving renewable distributed generator as a primary source, fuel cell (FC) as a secondary source, and battery-ultracapacitor as hybrid energy storage system (HESS). At first, the detailed mathematical model of the hybrid AC/DC microgrid is established. Then, the controller is designed with the main objective to ensure the constant DC and AC bus voltage during islanding and grid-connected mode. During grid-connected mode, the controller is capable of providing frequency support to the utility grid. After that, the asymptotic stability of the hybrid AC/DC microgrid is proved using Lyapunov stability criteria. Then, the performance and robustness of the proposed control approach are tested by simulating it on MATLAB/Simulink, and the results are compared with sliding mode controller and Lyapunov redesign. Finally, real-time hardware in the loop tests are conducted to validate the effectiveness of the proposed framework.

中文翻译：

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可再生能源和储能系统交直流混合微电网积分终端滑模控制器设计

摘要 传统发电正处于重大转型之中，可再生能源微电网在能源结构转型中发挥着关键作用。本文研究了基于积分终端和快速积分终端滑模控制的集中非线性控制器的设计，用于混合 AC/DC 微电网，涉及可再生分布式发电机作为主要来源，燃料电池 (FC) 作为二次来源，电池 -超级电容器作为混合储能系统（HESS）。首先，建立了交直流混合微电网的详细数学模型。然后，控制器的设计主要目标是在孤岛和并网模式下确保恒定的直流和交流母线电压。在并网模式下，控制器能够为公用电网提供频率支持。之后，使用Lyapunov稳定性准则证明了混合AC/DC微电网的渐近稳定性。然后，通过在 MATLAB/Simulink 上对其进行仿真来测试所提出的控制方法的性能和鲁棒性，并将结果与​​滑模控制器和 Lyapunov 重新设计进行比较。最后，进行实时硬件在环测试以验证所提出框架的有效性。