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Webinar: Generic Modeling of Grid-Forming Inverters: Phasor-Domain and EMT Perspectives
September 23, 2025 @ 4:00 pm - 5:00 pm EDT
Download Wei Du Presentation (Part 1)
Download Deepak Ramasubramanian Presentation (Part 2)
Featured Speakers: Deepak Ramasubramanian, Principal Technical Leader, EPRI; Wei Du, Solar Subsector Engineer and Staff Research Engineer, Pacific Northwest National Laboratory (PNNL)
Webinar Abstract: This presentation will highlight recent progress in phasor-domain and electromagnetic transient (EMT) modeling of grid-forming inverters (GFMs). It will first introduce the latest WECC standard library phasor-domain GFM models (REGFM_A1, REGFM_B1, REGFM_C1, and REPCGFM_C1), developed in collaboration with major GFM original equipment manufacturers (OEMs) and software vendors. These models have either already been integrated into or are in the process of being integrated into leading commercial stability simulation tools, including Siemens PSS®E, GE PSLF, PowerWorld Simulator, Powertech Labs TSAT, and DIgSILENT PowerFactory. Key control functions described in these models will be discussed. Second, the presentation will cover the development of generic EMT models of grid forming technologies, along with behavior in both positive sequence and negative sequence. Subsequently, a discussion on parameterization of generic models against blackbox OEM models would be delivered.
About the Speakers: Deepak Ramasubramanian is currently a Principal Technical Leader at the Electric Power Research Institute (EPRI). His work at EPRI includes development of new and improved mathematical models and processes, for the large electric power system, to represent the behavior of inverter interfaced generation sources, and loads, and evaluation and development of transmission planning criteria including uncertainty of sources and loads.
Dr. Wei Du is the solar subsector manager and a staff research engineer at Pacific Northwest National Laboratory (PNNL). He also holds a joint appointment as a Research Associate Professor at Washington State University (WSU) and serves as the interim co-director of the PNNL-WSU Advanced Grid Institute. His primary research areas include control design, modeling, and simulation of power systems with a high penetration of power electronics. Dr. Du is currently the Principal Investigator of multiple DOE projects that investigate the impacts of inverter-based resources on the stability of power systems. He also co-leads the Modeling and Simulation Area of the Universal Interoperability for Grid-Forming Inverters (UNIFI) Consortium.
In recent years, he leads the development of WECC standard library grid-forming inverter models in close collaboration with inverter manufacturers, software vendors, EPRI, and transmission planners and operators. These models have been integrated into leading commercial power system stability simulation tools for both industry and academic use.
Moderator: Dustin Howard, Technical Director – Energy Consulting, GE Vernova Consulting Services; ESIG Reliability Working Group Chair
Registration Cost: FREE
Q&A Session: We will be using the Slido platform for Q&A. Please submit your questions and follow along during the event at this link.
