TY - GEN
T1 - Estimation of Frequency and RoCoF of Non-Stationary Signals in Power Systems
T2 - 5th Conference on Fully Actuated System Theory and Applications, FASTA 2026
AU - Wang, Xuanqi
AU - Yang, Chaoyu
AU - Rui, Wang
AU - Li, Peng
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026
Y1 - 2026
N2 - This paper proposes a two-step scheme for estimating the frequency and its rate of change of non-stationary signals in modern power electronics-dominated power systems. In the first step, a finite-time identification scheme based on the Volterra integral operators is designed to track the frequency of the non-stationary signals with fast convergence. A novel augmented framework of signal identification is proposed to eliminate the effects of the harmonics and the measurement noise. In the second step, the estimated frequency is injected into a non-asymptotic numerical differentiator to track its rate of change. It has been proven the proposed estimator possesses fast convergence and robustness against the disturbance. Finally, simulation and experiments are conducted, and the estimation results are compared with known algorithms, demonstrating the effectiveness of the proposed method.
AB - This paper proposes a two-step scheme for estimating the frequency and its rate of change of non-stationary signals in modern power electronics-dominated power systems. In the first step, a finite-time identification scheme based on the Volterra integral operators is designed to track the frequency of the non-stationary signals with fast convergence. A novel augmented framework of signal identification is proposed to eliminate the effects of the harmonics and the measurement noise. In the second step, the estimated frequency is injected into a non-asymptotic numerical differentiator to track its rate of change. It has been proven the proposed estimator possesses fast convergence and robustness against the disturbance. Finally, simulation and experiments are conducted, and the estimation results are compared with known algorithms, demonstrating the effectiveness of the proposed method.
KW - harmonic
KW - linear time-varying system
KW - RoCoF estimate
UR - https://www.scopus.com/pages/publications/105043524668
U2 - 10.1109/FASTA70174.2026.11549476
DO - 10.1109/FASTA70174.2026.11549476
M3 - 会议稿件
AN - SCOPUS:105043524668
T3 - Proceedings of the 5th Conference on Fully Actuated System Theory and Applications, FASTA 2026
SP - 404
EP - 409
BT - Proceedings of the 5th Conference on Fully Actuated System Theory and Applications, FASTA 2026
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 22 May 2026 through 24 May 2026
ER -