Accurate Frequency Response Modeling in Integrated T&D Co-Simulation via EWMA-RTTA-Based Quadratic Extrapolation

Integrated T&D co-simulation is a powerful tool for studying frequency response in modern grids with high DPV penetration. However, the 100-fold time-step mismatch between transmission (e.g., time step=10ms) and distribution (e.g., time step=100 micro sec) systems introduces significant inaccuracies in PLL-based frequency calculations. This talk presents EWMA-RTTA-Based Quadratic Extrapolation, an adaptive method that predicts high-resolution distribution-side data from transmission measurements, reducing frequency modeling error by approximately 30x and enabling high-fidelity real-time co-simulation on OPAL-RT hardware.

 

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Jongha Woo

PhD Student, NC State University on April 24, 2026 at 10:15 AM in EB2 1231
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Jongha Woo is a Ph.D. candidate in Electrical Engineering at North Carolina State University, advised by Prof. Ning Lu. His research focuses on real-time T&D co-simulation, DER integration, and PV digital twin development. He received his M.S. and B.S. degrees from Konkuk University, South Korea, and was awarded the Grand Prize of Research Excellence (Korea Minister's Award) in 2021.

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