In this paper, a composite passivity-based control method based on a finite-time disturbance observer (FTDO) and a passivity-based control (PBC) is proposed to improve the stability of the Boost converters with constant power loads in DC Microgrids. The FTDO improves the robustness and rapidity of the system by accurately estimating system disturbances. The PBC ensures the stability of the system via its transient energy dissipation. The FTDO operates parallel to the PBC, and compensates the observed value to the PBC through a feedforward channel. When compared with other controls, the proposed composite passivity-based control has the advantages of a fast dynamic response and accurate tracking of system disturbances in a wide working range. Finally, the control method proposed in this paper is verified by MATLAB/Simulink simulations and hardware in the hard-ware-in-loop experiments.

在本文中，提出了一种基于有限时间扰动观测器（FTDO）和基于无源控制（PBC）的复合无源控制方法，以提高直流微电网中恒功率负载升压变换器的稳定性。FTDO 通过准确估计系统干扰来提高系统的鲁棒性和快速性。PBC 通过其瞬态能量耗散来确保系统的稳定性。FTDO 与 PBC 并行运行，并通过前馈通道将观测值补偿到 PBC。与其他控制相比，所提出的复合无源控制具有动态响应快和在宽工作范围内准确跟踪系统扰动的优点。最后，