IEEE Metropolitan Los Angeles Section Power & Energy Society Chapter

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)