直流微电网虚拟机协同自律控制最小禁止区稳定性研究

直流微电网作为智能配用电网的重要组成部分，在未来能源系统的发展中具有巨大潜力，电力电子化直流微电网的低惯性、多模态、强干扰等特性降低了其运行稳定性。已有稳定性研究多停留在协调控制及稳态工作点附近的小扰动层面，无法满足直流微电网多模态多尺度的复杂非线性控制系统的设计。拟申请项目通过深入分析影响直流微电网稳定运行的内外部因素，探索提升直流微网稳定运行的控制策略和系统配置参数的边界条件，提出提升直流微电网惯性特性的控制方法，建立多模态运行条件下直流微电网的非线性控制系统模型，提出具有最小禁止区的直流微电网稳定性判定方法。项目对改善直流微电网运行稳定性、规模化利用再生能源具有重要意义。

As an important part of smart distribution network, DC microgrid has great potential in the development of future energy systems. The low inertia, multi-modality, and strong interference characteristics of power electronic DC microgrid reduce its operational stability. Existing stability studies mostly focus on the level of coordinated control and small disturbances in the steady-state operating points, which cannot satisfy the design of multi-mode and multi-scale DC microgrids with complex nonlinear control systems. The proposed project will analyze the internal and external factors affecting the stable operation of the DC microgrid, explore the control strategies and system configuration parameters for improving the stable operation of the DC microgrid, propose a control method to improve the inertial characteristics of the DC microgrid. And then, establishing a nonlinear control system model of the DC microgrid under the multi-modal operating conditions. In the end, proposing a method with a minimum forbidden zone for determining the stability of the DC microgrid. The project has great significance for improving the operation stability of the DC microgrid and the large-scale utilization of renewable energy.