EAGER: Toward a Network-Based Framework for Analysis and Control of Inverter-Dominated Power Grids

通过电力电子逆变器将可再生能源越来越多地集成到电网中，从根本上改变了电网动态，并引起了次同步振荡的新问题。这个NSF EAGER项目旨在了解互连逆变器如何共同引起这些振荡，以及如何设计控制策略来减轻它们。该项目将通过利用基础电网的结构特性，为振荡分析和控制带来变革性的变化，这些结构特性与现有的传统方法截然不同。这将通过开发一种新的基于网络的框架，分析和控制的次同步振荡。该项目的智力价值包括新的见解，将补充从当前研究中获得的见解，以提供更深入的理解和更完整的次同步振荡机制，以及新的基于网络的控制策略，这将有助于电网规划者和运营商解决这个问题。该项目更广泛的影响包括促进更多地采用可再生能源，这对实现可持续经济和社会至关重要，并促进多学科教育和向学术界和工业界传播成果。逆变器资源（IBR）的日益普及导致了电力系统中的次同步振荡（SSO）事件，危及电网的稳定性和可靠性。SSO由逆变器的快速和复杂的控制动态驱动。由于IBR之间复杂的相互作用，在具有许多异构IBR的大规模电网中理解SSO机制并开发缓解解决方案具有挑战性。这个NSF项目将设计一个基于网络的SSO分析和控制框架。该框架将一个具有多个异构IBR的大规模电力系统转化为一组简单的子系统，用于从电力网络结构的角度解释SSO机制并制定缓解策略。该项目将推进理解SSO机制和设计缓解策略的基础知识状态，以支持大规模可再生资源在国家电网中的可靠整合。该奖项反映了NSF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。

The growing integration of renewable energy into the power grid via power electronic inverters has fundamentally changed grid dynamics, and caused emerging issues of sub-synchronous oscillations. This NSF EAGER project aims to understand how interconnected inverters collectively cause these oscillations, and how to design control strategies to mitigate them. The project will bring transformative changes to oscillation analyses and control by leveraging the structural properties of the underlying power network, which are radically different from the existing traditional methods. This will be achieved by developing a novel network-based framework for analysis and control of sub-synchronous oscillations. The intellectual merits of the project include new insights that will complement those obtained from current studies to provide a deeper understanding and a more complete picture of the sub-synchronous oscillation mechanism, as well as novel network-based control strategies that will help grid planners and operators in addressing this problem. The broader impacts of the project include contributing to the increasing adoption of renewable energy, which is essential for evolving towards a sustainable economy and society, and fostering multidisciplinary education and dissemination of results to academia and industry. The increasing penetration of inverter-based resources (IBRs) has resulted in sub-synchronous oscillation (SSO) events in electric power systems, jeopardizing grid stability and reliability. The SSO is driven by the fast and complex control dynamics of inverters. It is challenging to understand the SSO mechanism and develop mitigation solutions in a large-scale power grid with many heterogenous IBRs due to the complex interaction between these IBRs. This NSF project will design a network-based framework for SSO analysis and control. This framework will transform a large-scale power system with many heterogenous IBRs into a set of simple subsystems for interpreting SSO mechanism and developing mitigation strategies from the perspective of power network structure. This project will advance the state of fundamental knowledge on understanding the SSO mechanism and designing mitigation strategies to support the reliable integration of large-scale renewable resources in the national grid.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.