Power system strength has become a major topic in grid-connection practice and is even mentioned in the popular press. Everyone agrees that it’s a good thing – and that we want more of it – but there doesn't seem to be a consensus on exactly what it means. Rotating synchronous machines and, possibly, grid-forming inverters seem to provide system strength, while grid-following inverter-based resources seem to consume it. Precisely what is being “consumed”, how, and in what quantities are generally not discussed. This talk offers a clear definition of system strength (beyond fault-level) and provides an intuitive explanation of how inverters may reduce it. It then reviews how system strength is assessed and regulated in the Australian National Electricity Market, highlighting both notable successes and ongoing challenges as inverter-based generation and storage continue to <a href="http://grow.Speaker(s):" target="_blank" title="grow.Speaker(s):">grow.Speaker(s): , Peter MayerRoom: 46-914, Bldg: Andrew N. Liveris Building , St Lucia Campus, The University of Queensland, Brisbane, Queensland, Australia, Virtual: https://events.vtools.ieee.org/m/538006

Abstract: As renewable penetration increases and synchronous machine inertia declines, grid-forming converters must maintain system stability and emulate inertial response while maintaining stability across diverse operating conditions. This seminar will share a data-driven stabilization control strategy for hybrid AC/DC grid-forming systems that helps overcome the contradiction of stability and dynamic response. Then, a framework to manage the system inertia will be presented. A novel circuit-based approach will be shared to shed some light on establishing a unified model to quantify inertia generation, transfer, and vanishing in complex AC/DC grid-forming <a href="http://networks.Bio:" target="_blank" title="networks.Bio:">networks.Bio: Pengfeng Lin, Marie Skłodowska-Curie Actions Individual Fellowship, is an Assistant Professor at Shanghai Jiao Tong University. He received the B.S. and M.S. degrees in electrical engineering from Southwest Jiaotong University, China, in 2013 and 2015, respectively, and the Ph.D. degree in the Interdisciplinary Graduate Programme from Nanyang Technological University, Singapore, in 2020. He was with Energy Research Institute at NTU as a Research Fellow and with Électricité de France (EDF) as a Smart Grid Energy Expert / Research Scientist. He is in the global top 2% of Scientists conferred by Standard University. His research interests include power system stability/reliability analyses, smart grid cyber-physical security, and artificial intelligence <a href="http://analytics.Room:" target="_blank" title="analytics.Room:">analytics.Room: 46-402, Bldg: Andrew N. Liveris Building, St Lucia Campus, The University of Queensland, Brisbane, Queensland, Australia

Abstract: As renewable penetration increases and synchronous machine inertia declines, grid-forming converters must maintain system stability and emulate inertial response while maintaining stability across diverse operating conditions. This seminar will share a data-driven stabilization control strategy for hybrid AC/DC grid-forming systems that helps overcome the contradiction of stability and dynamic response. Then, a framework to manage the system inertia will be presented. A novel circuit-based approach will be shared to shed some light on establishing a unified model to quantify inertia generation, transfer, and vanishing in complex AC/DC grid-forming <a href="http://networks.Bio:" target="_blank" title="networks.Bio:">networks.Bio: Pengfeng Lin, Marie Skłodowska-Curie Actions Individual Fellowship, is an Assistant Professor at Shanghai Jiao Tong University. He received the B.S. and M.S. degrees in electrical engineering from Southwest Jiaotong University, China, in 2013 and 2015, respectively, and the Ph.D. degree in the Interdisciplinary Graduate Programme from Nanyang Technological University, Singapore, in 2020. He was with Energy Research Institute at NTU as a Research Fellow and with Électricité de France (EDF) as a Smart Grid Energy Expert / Research Scientist. He is in the global top 2% of Scientists conferred by Standard University. His research interests include power system stability/reliability analyses, smart grid cyber-physical security, and artificial intelligence <a href="http://analytics.Room:" target="_blank" title="analytics.Room:">analytics.Room: 46-402, Bldg: Andrew N. Liveris Building, St Lucia Campus, The University of Queensland, Brisbane, Queensland, Australia