报告地点：学术会议中心三楼报告厅
报告人：Nikolaos Chatziargyriou
工作单位：雅典国立技术大学 ( National Technical University of Athens )
举办单位：电气与自动化工程学院
学术报告1：
Data-Driven Frequency Dynamic Unit Commitment for Island Systems with High-RES Penetration
报告时间：2024年10月25日 上午8：30~9：20
报告简介：
The replacement of directly connected synchronous generators with power electronics interfaced generation has led to a decrease in system's inertia posing a significant challenge on frequency dynamics. In isolated systems with reduced inertia predefined limits for renewable penetration and primary reserves are frequently set for dynamic security purposes. This approach might not ensure dynamic security or can prove conservative in certain conditions. Furthermore, these approaches rarely consider the capabilities of inverter based renewable generation to provide frequency services. In this presentation, a data driven approach, based on optimal classification trees is described to extract, from a detailed dynamic model of the system, the constraints for a frequency dynamic unit commitment formulation. Hence, both dynamic security and optimal exploitation of renewable and conventional units for power production and frequency support can be achieved. The advantages of the proposed method compared to conventional and state of the art approaches in frequency security are validated through dynamic simulations on a realistic model of Rhodes Island. Uncertainties in load demand and renewable generation are dealt by a robust optimization method. Its economic performance, computational overhead and modelling complexity is compared to a stochastic approach.
Despite the benefits however, system operators may be reluctant to embrace these solutions, as the models may be challenging to interpret, perceived as black boxes. Additional concerns may arise regarding the adequacy of testing under realistic conditions. In the presentation these concerns are further addressed by introducing a digital twin designed for the realistic testing of dynamic security assessment applications in the system of Rhodes. The developed digital twin incorporates two options for the virtual model of the island: an interface with a commercial RMS/EMT software and a real time simulator together with an industrial under frequency load shedding protection equipment. The settings of the actual field devices in the island are tested through a hardware in the loop interface.
学术报告2：
Aggregation of Battery Energy Storage and Distributed Resources
报告时间：2024年10月25日 上午9：20~10：10
报告简介：
Battery energy storage systems (BESS) are increasingly installed in distribution grids in conjunction with other distributed energy resources (DER). These resources are photovoltaic (PV) systems and other distributed generation, including generation from renewable energy resources such as wind and small hydro. One of the roles of BESS, in support of the wide deployment of renewable energy resources, is to meet the requirement for energy balancing to mitigate resource variability and intermittency and make the combination of BESS and renewable DER dispatchable. This balancing feature is applicable to smaller, roof-top PV installations (behind the meter) connected to the low voltage (LV) grid and to larger PV or wind farms connected to medium voltage (MV) distribution feeders. In the latter case, the combined installation feeds energy directly into the distribution system.
BESS are key enablers for the implementation of active distribution system functions and for providing a range of grid services at the distribution level. Grid services include voltage support, feeder power flow control, load and hosting capacity management, local energy and capacity provision, and reliability and resilience services in the event of contingencies and exceptional weather events. In this technical brochure, it is assumed that these services are provided to the distribution system.
报告人简介：
Nikolaos Chatziargyriou is since 1984 with the Electrical and Computer Engineering School, National Technical University of Athens (NTUA), Professor in Power Systems since 1995, and Professor Emeritus since 2022. He is also part-time Professor at the University of Vaasa, Finland. He has over 10 years of industrial experience as Chairman and the CEO of the Hellenic Distribution Network Operator (HEDNO) (2015-2019) and as Executive Vice-Chair and Deputy CEO of the Public Power Corporation (PPC) (2007-2012), responsible for the Transmission and Distribution and the Islands Divisions. He is author of 300 journal publications and 600 conference proceedings papers. He is included in the 2016, 2017, and 2019, Thomson Reuters lists of the top 1% most cited researchers. He is 2020 Globe Energy Prize laureate, recipient of the 2017 IEEE/PES Prabha S. Kundur Award and the 2023 IEEE Herman Halperin Electric Transmission and Distribution Award. He was Chair of the Power System Dynamic Performance Committee of IEEE, EiC of the IEEE TPWRS, and is currently EiC-at-Large for IEEE PES Transactions. He is honorary member of CIGRE and was the Chair of CIGRE SC C6 “Distribution Systems and Distributed Generation.” He was the Chair and Vice-Chair of the EU Technology and Innovation Platform on Smart Networks for Energy Transition (ETIP SNET). He has participated in more than 60 R&D projects funded by the EU Commission, electric utilities and industry for fundamental research and practical applications.
