Presented by: Mainish Patel, Silicon Ranch Corporation This webinar: The penetration of inverter-based resources is growing rapidly around the globe. During a fault, the behavior of inverter-based resource is very different from a traditional synchronous machine based generation. As the penetration of inverter-based resources increases, thee industry needs to understand their behavior so that these resources can be accurately modeled and their impact on various protection schemes can be studied in detail. There is also an opportunity to standardize the fault response to the extent possible. This presentation will also discusses challenges with modeling inverter-based resources in a short circuit programs which are developed for systems dominated by synchronous machines. Presenters bio: Manish Patel earned his Bachelor of Engineering degree in Electrical Engineering from B. V. M. Engineering College, V. V. Nagar, India, in 2000, and his Ph.D. in Electrical Engineering from Clemson University, Clemson, SC, in 2009. He currently serves as a Senior Principal Engineer at Silicon Ranch Corporation. In April 2024, he joined the Electric Power Research Institute (EPRI) as a Technical Executive. Prior to EPRI, he spent 17.5 years at Southern Company, where he held various roles focused on Protection & Control and Transmission Planning. Dr. Patel is an active member of the IEEE Power System Relaying and Control (PSRC) Committee and is a licensed Professional Engineer in the state of Alabama.

Presented by: Dr. Sukumar Brahma, Clemson University This webinar: Phasor domain short circuit analysis (PDSCA) is performed to calculate fault currents, which in turn helps choose equipment rating and relay settings. Traditionally, power system is considered to be a linear system for this analysis, as generators that are operated in a non-linear fashion (PV sources) during normal operation behave as Thevenin sources (linear) during fault. Due to inherently nonlinear response to fault of inverters that interconnect renewables, this underlying assumption of linearity breaks down and a new analytical framework is required. Also, as the fault currents contributed by inverters are comparable to load currents, inclusion of loads (which are nonlinear) into short circuit analysis is required for accurate results. This webinar will show how phasor domain short circuit analysis can be accurately performed in presence of any penetration level of IBRs. Presenter bio: Dr. Brahma is a Distinguished Lecturer of the IEEE PES. He has been elected IEEE Fellow “for contributions to power system protection with distributed and renewable generation”. He chaired the Working Group C24 within PSRC that performed foundational work on the topic under discussion in this webinar, which is captured in PES TR-78 (https://resourcecenter.ieee-pes.org/publications/technical-reports/pes_tp_tr78_psrc_fault_062320)