A New Structure-Based Approach to Generation Control and Frequency Regulation in Response to Slow Load Variations

9419353 ILIC本项目采用了一种已经构思的基于结构的建模方法，该方法不需要假设弱互连，而且它还自然地将直接控制线路流量的设备包括在内。本提案简要概述了这一办法的显著特点，这些特点使目前的办法得以如此广泛地推广，并得到若干出版物的进一步支持。在概念上，所提出的方法允许提取与超大规模动力系统的各个层次直接相关的最小阶模型，这与多变量系统的协调理论的精神非常相似。PI和她的团队最近开发的建模和控制概念提供了简单的方法，通过与复杂系统的特定级别直接相关的显式低阶模型来支持这一主要定性的理论。利用垂直分离原理，在最低层动态稳定和快速的假设下，从二次(子系统)和三次(互联)系统两个层次提取了相对低阶的离散时间模型。在该方案中，这些模型与所捕获的物理过程之间的直接映射被应用于多公用事业环境中用于频率调节的实际发电控制问题。本项目的主要目标是将该方法应用于进一步开发电力系统下一代负荷频率控制(LRC)/自动发电控制(AGC)的系统框架。特别强调的是适应美国公用事业公司之间不断发展的开放获取运营模式。***

9419353 Ilic This project uses an already conceived structure-based modeling approach which does not require the assumption on weak interconnections, and it also naturally lends itself to inclusion of devices which control the line flows directly. The salient features of this approach which allow for such significant generalization of the present approaches are briefly summarized in this Proposal, and are further supported by several publications. Conceptually, the proposed approach allows for extracting minimum order models directly relevant for various levels of a very large scale dynamical system, much in the spirit of the Coordination Theory for multivariable systems. The modeling and control concepts developed recently by the PI and her team offer simple ways of supporting this mainly qualitative theory in terms of explicit, low order models directly relevant for specific levels of a complex system. Using vertical separation principle under the assumption of stable and fast dynamics at the lowest level, relatively low- order-discrete-time models are extracted at both secondary (subsystem) and tertiary (interconnected) system levels. A direct mapping between these models and the physical processes captured are illustrated in this Proposal as applied to the real power generation control problem for frequency regulation in a multi-utility environment. The main objective of this project is to apply this approach towards further development of a systematic framework for next generation Load Frequency Control (LRC) / Automatic Generation Control (AGC) of the electric power systems. Particular emphasis is on accommodating the open access operating mode evolving among the utilities in the United States. ***