A Measurement based Framework for Dynamic Equivalencing of Large-Scale Power Systems using Synchrophasors

摘要：本研究的目的是开发一个统一的分析程序框架，通过该框架可以识别大型电力系统网络的简化的降阶机电模型，而不是通过对网络中每个单独组件建模的传统方法。而是通过使用安装在网络中特定点的相量测量单元（pmu）提供的动态数据。该方法将使用非线性电路理论、基础物理学和图论的概念来进行基于测量的模型简化，并将这些模型应用于广域监测和控制中。研究结果将与美国电力公司和南加州爱迪生公司合作，利用美国西海岸电力系统和东德克萨斯电网最近发生的扰动事件的PMU数据进行验证。本研究的智力价值在于通过将PMU技术与动态系统理论和网络科学相结合，建立了一个具有重要意义的新颖应用领域。这将极大地有利于电力系统保护工程师在关键紧急情况下从大量原始PMU数据中解释有关互联电网动态的有意义信息。该项目的更广泛影响将是提供急需的、及时的控制理论思想注入，以推进同步相量集成下一代电网的新兴研究，并通过各种推广活动（包括期刊出版物、与德克萨斯州公用事业公司的工业合作、智能电网的本科生研究）创造全国影响力。以及为来自西德克萨斯州几个少数族裔机构的未被充分代表的学生群体提供电力系统教育。

A Measurement based Framework for Dynamic Equivalencing of Large-Scale Power Systems using SynchrophasorsAranya ChakraborttyAbstract:The objective of this research is to develop a unified framework of analytical procedures by which simplified reduced-order electro-mechanical models of large power system networks can be identified, not by the traditional approach of modeling each individual component in the network, but by using dynamic data available from Phasor Measurement Units (PMUs) installed at only specific points in the network. The approach will be to use concepts of nonlinear circuit theory, fundamental physics and graph theory for such measurement-based model reduction, and for employing these models in wide-area monitoring and control. The results will be validated with PMU data from recent disturbance events in the US West coast power system and the East Texas grid in collaboration with American Electric Power and Southern California Edison.The intellectual merit of this research is in establishing a significantly novel application area of the PMU technology through its integration with dynamic system theory and network science. This will benefit power system protection engineers tremendously in interpreting meaningful information about the interconnected grid dynamics from overwhelming amounts of raw PMU data during critical emergencies.The broader impact of this project will be in providing a much-needed, timely infusion of control theoretic ideas to advance emerging research on synchrophasor-integrated next generation power grids, and in creating a national influence through a variety of outreach activities including journal publications, industrial collaborations with the Texas utilities, undergraduate research on smart grids, and power system education for underrepresented student groups from several minority institutions in West Texas.