Modulation-Assisted Phasor Estimation
Accurate fault current phasor estimation under decaying DC offsets (IEEE TPWRD, 2026).
Fault currents in power transmission and distribution lines frequently contain decaying DC (DDC) offsets that severely corrupt conventional Discrete Fourier Transform (DFT) phasor estimation in digital protective relays.
This project develops an accurate modulation-assisted method to isolate and suppress decaying DC components without requiring prior knowledge of the DC time constant, enabling fast and reliable phasor estimation during transient fault conditions.
Publication:
- S. Mohammadi, W. Su (2026). “An Accurate Modulation-Assisted Method for Phasor Estimation Under Decaying DC Offsets,” IEEE Transactions on Power Delivery (Under Review).