CAREER: A Multiphysics Framework for Modeling, Analysis, and Experimentation of Power Systems and Power Electronics

今天，电力系统被概念化为无源元件、电力电子、旋转机械和各种规模的控制回路的错综复杂的纠缠。每个子系统通常以一种短视的方式，用专门定制的方法进行研究。在本提案中，我们展示了如何在电路理论框架下统一闭环多物理场能量系统，并通过电力电子仿真有效地原型化。由于电力电子设备及其闭环控制动作可以建模为等效电路，因此可以获得从变流器级（瓦）到系统级（兆瓦）有效地桥接电力电子设备和电力系统的模型。研究主题在电路，控制和电源的融合方面具有独特的优势，因此项目成果将解决设计可持续动力未来系统的基本挑战。所提出的技术自然会产生各种各样的学习机会，其中复杂系统及其控制可以直接描述，并且一旦将其视为电路，其实际行为就会变得明显。因此，该框架编纂了电气工程中的许多主题，以便学生可以在他们的教育经历中无缝地应用这些概念。该项目将开发建模和实验框架，以研究现代系统中的能量动力学。基本的方法是基于第一个显示，众所周知的电路定律是自然嵌入在电力电子控制反馈路径。这允许将控制器动态行为直接转换为转换器的等效电路表示；扩展进一步为异构系统包含电力电子，传感器和机械。这是一个用于闭环电力系统和电子建模的综合框架，其中能量作为子系统模型之间的基本链接。主要研究方向为：建立具有闭环网络控制的多物理场系统等效电路模型；为大量使用电子器件的复杂电力系统及其伴随的快速控制系统建立电路模型；并概述了一套用于多物理场电力系统和机电仿真的实验方法。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Today, power systems are conceptualized as a convoluted tangle of passive components, power electronics, rotating machinery, and control loops at various scales. Each subsystem is typically studied in a myopic manner with specifically tailored methods. In this proposal, we show how closed-loop multiphysics energy systems can be unified under a circuit theoretic framework and prototyped effectively with power electronics emulation. Since power electronics and their closed-loop control action can be modeled as equivalent circuits, models are obtained that effectively bridge the power electronics and power systems divide, from the converter-level (Watts) to the system-level (Megawatts). Research themes are uniquely poised at the confluence of circuits, control, and power such that project outcomes will address fundamental challenges in the design of sustainably-powered future systems. The proposed techniques naturally yield a variety of learning opportunities where complex systems and their controls can be straightforwardly depicted and their actual behavior becomes obvious once seen as a circuit. Accordingly, this framework codifies numerous topics within electrical engineering so that students can seamlessly apply concepts across their educational experience.The project will develop modeling and experimentation frameworks that allow for the study of energy dynamics in modern systems. The underlying approach is based on first showing that well-known circuit laws are naturally embedded in control feedback paths for power electronics. This allows for a direct translation of controller dynamical behavior into equivalent circuit representations for converters; extensions are further made for heterogeneous systems containing power electronics, sensors, and machinery. What emerges is a comprehensive framework for closed-loop power systems and electronics modeling where energy acts as the fundamental link between subsystem models. Research thrusts focus on: developing equivalent circuit models for multiphysics systems with closed-loop cyber controls; formulating circuit models for complex power systems with massive utilization of electronics and their accompanying fast controls; and outlining a suite of experimental methodologies for emulation of multiphysics power systems and electromechanics.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.