Instantaneous Frequency in Power Systems using the Teager-Kaiser Energy Operator
Systems and Control
2026-01-22 v1 Systems and Control
Signal Processing
Abstract
This paper develops an instantaneous-frequency (IF) local estimator calculated with the complex Teager-Kaiser energy operator (CTKEO) and the dynamic-signal identity. The contribution is a novel IF expression that makes the envelope-curvature terms explicit, thus correcting the bias that affects conventional estimators used in power systems. The estimator aligns with complex-frequency (CF) kinematics and admits a geometric interpretation (curvature/torsion) without phase unwrapping. Simulations and data-driven examples demonstrate the accuracy of the proposed approach.
Cite
@article{arxiv.2601.15099,
title = {Instantaneous Frequency in Power Systems using the Teager-Kaiser Energy Operator},
author = {A. Vaca and J. Gutierrez Florensa and F. Milano},
journal= {arXiv preprint arXiv:2601.15099},
year = {2026}
}