学术报告 报告题目： Are we ready to face the paradigm shift: Increased distributed energy resources, microgrids and advanced power electronic interfaces? 报告人： Prof. Siddhartha Kumar Khaitan & Dr. Mandhapati Raju 单位： Iowa State University & Ecsta-Sci Tech Consultants 时间： 4 月 22 日 2:30-4:30pm 地址：清华大学西主楼 联系人 : 陈颖（ ）

Abstract: This talk presents the development of the energy scenario in the present world marked by rapid increase in the renewable energy resources (in particular the distributed energy sources) around the globe. How is it changing the paradigm? In what ways will it impact the grid in terms of resiliency and reliability? What challenges will we face? Are we ready to face it? What is our vision and goals? What kinds of tools and algorithms are required and what should be the characteristics of such tools? This talk will also present the concept of microgrids and their controls and present a brief discussion on micro-inverters and role all these can play in a future resilient and reliable power grid. This talk will also touch upon the need for a cyber-physical systems approach for future grid design and operation and the need for high performance computing to achieve the vision of safe, reliable and resilient grid operation.

学术报告 报告题目： State-of-the-art modeling and simulation of Compressed Air Energy Storage (CAES) systems 报告人： Prof. Siddhartha Kumar Khaitan & Dr. Mandhapati Raju 单位： Iowa State University & Ecsta-Sci Tech Consultants 时间： 4 月 23 日 9:30-11:30am 地址：清华大学西主楼 联系人 : 陈颖（ ）

Abstract: With increasing energy demands, compressed air energy storage (CAES) presents itself as an attractive bulk energy storage system that can not only increase the efficiency of the current grid utilization but also promotes the penetration of intermittent renewable energy sources. This presentation gives an overview of the conventional CAES and the emerging innovative CAES applications. Modeling of CAES systems play an important role in the design, maintenance and operation of CAES. Accurate modeling of CAES system is essential to capture the dynamics of power generation and utilization. Detailed dynamic simulation models of various individual components (compressor, cavern, combustor and turbine) of the CAES system are presented. Special emphasis is on the use of wall heat transfer model to account for the temperature variation inside the cavern. The model can be calibrated using a priori tests conducted to determine the cavern characteristics. Using Huntorf plant as a case study, it is demonstrated that an accurate heat transfer model can result in accurately capturing the dynamics of the daily operation of the CAES plant. A CAES plant simulator is designed to assist engineers in designing and operating a CAES plant. A detailed computational fluid dynamics (CFD) model of CAES components can also further assist in improving the design of CAES components. Innovative designs of high efficiency CAES components and future research directions will be discussed.

About the Speaker: Prof. Siddhartha Kumar Khaitan is currently a Research Assistant Professor with the Department of Electrical and Computer Engineering, Iowa State University. He received his Ph.D. degree from Iowa State University, USA, in He has authored/coauthored several international journal and conference papers, book chapters and also published three books. His research interests are in modeling and simulation of power and energy systems, energy storage (compressed air, hydrogen), renewable energy modeling and integration, infrastructure systems planning and investment, and high-performance computing application in power and energy systems. Dr. Mandhapati Raju is the CEO of Ecsta-Sci Tech Consultants, which specializes in offering innovative solutions in the area of renewable energy systems, computational fluid dynamics and combustion. Dr. Raju completed his Masters and PhD from Case Western Reserve University in the field of microgravity combustion. He has also done Post-Doctoral study at Case Western Reserve University. His expertise is in the field of Computational fluid dynamics, Combustion, Chemical Kinetics, High performance computing and Energy storage. He worked at major automotive industries like Caterpillar and General Motors.