CAREER: Integrated Research and Education in Nonlinear Modal Decoupling and Control for Resilient Interconnected Power Systems

职业：弹性互联电力系统非线性模态解耦和控制的综合研究和教育

• 批准号: 1553863
• 负责人: Kai Sun
• 金额: $ 50万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-03-01 至 2022-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1553863&HistoricalAwards=false
• 关键词: CAREER; Integrated; Research; Education; Nonlinear

The conventional classification of power system stability has worked for decades in practice but will no longer be adequate on interconnected power systems with high penetration of intermittent renewable resources because some predefined stability categories such as small-signal stability and transient stability are no longer separate in real-life power system instabilities. In fact, stability assessment for a power system is a single nonlinear dynamic problem from the system point of view. However, a major technical gap lies in the current lack of fast, accurate stability analysis tools for complex, interconnected, nonlinear systems like power systems. This project aims at reducing that gap by establishing a new methodology for power system stability analysis and control based on understanding, decoupling and control of nonlinear modal dynamics. The outcomes of the project are expected to create broad impacts on both the power industry and research community. Fundamental theories established with the proposed new methodology can be generalized for other large-scale dynamic systems. The project will educate students at various levels in comprehending modal dynamics and nonlinearities inherent in interconnected power systems and train next-generation scientists and engineers to bring more nonlinear thinking to researching, designing and operating the future smart grid accommodating more renewable energy.The research goals of the project include: (1) acquiring an in-depth understanding in nonlinear modal dynamics of an interconnected power system that are associated with invariant manifolds of the system state, (2) establishing a new approach for improving power system stability by nonlinear modal decoupling and control, and (3) boiling the new approach down to simple recipes such as practical tools for nonlinear modal analysis and stability monitoring of power systems. More specifically, the project will extend the concept of linear normal modes in small-signal stability analysis to nonlinear normal modes of power systems for global stability analysis, establish a theoretical foundation for natural decoupling and controlled decoupling of nonlinear normal modes based on the normal form method to structurally decompose the mathematical model of a power system, and propose innovative online stability assessment and control algorithms based on tracking and control of modal energy with nonlinear normal modes. This new methodology could be transformative to power system stability areas since the idea of understanding the nonlinear modes with power systems has not received enough attention in those areas and there is significant simplicity with stability analysis focusing on one or few modes compared to the original high-dimensional system model. Thus, the research of this project may point to a new avenue for faster-than-real-time stability assessment and control complementing the traditional computer simulation based approach.

电力系统稳定性的常规分类在实践中已经有效了数十年，但是对于具有高渗透性的可再生能源资源渗透高的相互连接的电力系统将不再足够，因为在现实生活中，一些预定义的稳定性类别（例如小信号稳定性和短暂性稳定性）不再是独立的。实际上，从系统的角度来看，电力系统的稳定性评估是一个单一的非线性动态问题。但是，主要的技术差距在于目前​​缺乏用于复杂，相互联系的非线性系统（如电源系统）的快速，准确的稳定分析工具。该项目旨在通过基于对非线性模态动力学的理解，解耦和控制来建立用于电力系统稳定性分析和控制的新方法来减少差距。预计该项目的结果将对电力行业和研究社区产生广泛的影响。用拟议的新方法建立的基本理论可以推广到其他大规模动态系统。该项目将教育各个层次的学生，了解相互联系的电力系统固有的模态动力和非线性，并培训下一代科学家和工程师，将更多的非线性思维带来研究，设计和操作未来的智能网格，以适应更多可再生能源。系统状态，（2）通过非线性模态去耦和控制来建立一种新的方法来改善电力系统稳定性，以及（3）将新方法沸腾到简单配方，例如用于非线性模态分析和电源系统稳定性监测的实用工具。更具体地说，该项目将在小信号稳定性分析中将线性正常模式的概念扩展到用于全球稳定性分析的非线性正常模式，为基于正常形式的非线性正常模式建立理论基础，并基于正常形式的非线性正常模式，以基于结构上的能量模式，并控制了基于网络稳定性模型，并控制了远程模式，并控制了远程模式，并控制了远程模式。非线性正常模式。这种新方法可能是对电力系统稳定区域的变革性的，因为与原始的高维系统模型相比，在这些领域了解非线性模式没有足够的关注，并且稳定性分析的重点是一种或几种模式。因此，对该项目的研究可能指出了一种新的途径，以更快的时间稳定性评估和控制，以补充传统的基于计算机模拟的方法。