TY - GEN
T1 - Extremum Seeking Control based Resonant Frequency Estimation for a Grid-Tied Inverter with LCL Filter
AU - Wu, Yuheng
AU - Mahmud, Mohammad
AU - Diao, Fei
AU - Zhao, Yue
AU - Moorthy, Radha Krishna
AU - Chinthavali, Madhu Sudhan
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - The resonant frequency of the LCL filter can drift away from its nominal value due to the circuit components parameters uncertainty and the grid-side impedance, which will further deteriorate the robustness of the system and damping performance. Conventional online resonant frequency estimation schemes, such as discrete Fourier transformation and recursive prediction error, require a significant amount of computational power to implement, which may even need to reduce the sampling and control frequency of the inverter controller. In this work, an extremum seeking control based resonant frequency estimation scheme is proposed, which can provide an accurate estimate of the resonant frequency with notably reduced execution time. Simulations, hardware-in-the-loop (HIL) tests, and experimental tests on a single-phase grid-tied inverter are conducted to validate the effectiveness of the proposed scheme.
AB - The resonant frequency of the LCL filter can drift away from its nominal value due to the circuit components parameters uncertainty and the grid-side impedance, which will further deteriorate the robustness of the system and damping performance. Conventional online resonant frequency estimation schemes, such as discrete Fourier transformation and recursive prediction error, require a significant amount of computational power to implement, which may even need to reduce the sampling and control frequency of the inverter controller. In this work, an extremum seeking control based resonant frequency estimation scheme is proposed, which can provide an accurate estimate of the resonant frequency with notably reduced execution time. Simulations, hardware-in-the-loop (HIL) tests, and experimental tests on a single-phase grid-tied inverter are conducted to validate the effectiveness of the proposed scheme.
KW - LCL filter
KW - extremum seeking control (ESC)
KW - grid-tied inverter
KW - resonant frequency estimation
UR - http://www.scopus.com/inward/record.url?scp=85123387577&partnerID=8YFLogxK
U2 - 10.1109/ECCE47101.2021.9595405
DO - 10.1109/ECCE47101.2021.9595405
M3 - Conference contribution
AN - SCOPUS:85123387577
T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
SP - 882
EP - 886
BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Y2 - 10 October 2021 through 14 October 2021
ER -