论文标题
强大的控制方法，以最大程度地减少多环控制中的带宽比
Robust Control Approaches for Minimizing the Bandwidth Ratio in Multi-Loop Control
论文作者
论文摘要
常规的DC-DC，DC-AC转换器控制需要内部电流和外电压（ICOV）控制回路。多环控制的稳定性是通过确保内部环的更快动力学来实现的，通常将带宽分开。从启发式上讲，四个因素通常被用来分开嵌套体系结构中两个相邻环的带宽。在本文中，我们提出了一种数值方法，可以最佳选择嵌套控制器的带宽比率。我们首先操纵强大的框架，以表明最佳的$ h_ \ infty $集成了经典的内部电流外电压控制。然后，我们使用建议的$ H_ \ infty $控制器的最优性来检查内部和外部控制器带宽不同比率的可行性。我们最终选择了两个嵌套环的数值最接近的带宽，以确保稳定性。模拟模型用于验证具有内部电流电压控制的候选网格形成DC-AC转换器的最佳带宽分离。
Conventional dc-dc, dc-ac converter control entail an inner current and outer voltage (ICOV) control loop. Stability of multi-loop control is achieved by ensuring faster dynamics of inner loops, often separating the bandwidths by large factors. Heuristically a factor-of-ten has often been used to separate the bandwidths of two adjacent loops in the nested architecture. In this paper, we present a numerical method to optimally select the ratio of bandwidths for a nested controller. We first manipulate the robust framework to show that the optimal $H_\infty$ subsumes the classical inner current outer voltage control. We then use optimality of the proposed $H_\infty$ controller to inspect feasibility of different ratios of bandwidths of the inner and outer controllers. We finally select the numerically closest bandwidths of the two nested loops which the guarantee stability. Simulation models are used to verify the optimal bandwidth separation for a candidate grid-forming dc-ac converter with inner current-outer voltage control.
