An Adaptive Additional Control Strategy for Suppressing Low-Frequency Grid Oscillations in Doubly-Fed Wind Farms

Aiming at the problem of weakly or negatively damped low-frequency oscillations caused by cross-zone transmission of electricity from large wind farms, this paper proposes a fast terminal sliding-mode additional damping controller based on the Lyapunov stability theory. By investigating the flexible...

Full description

Saved in:
Bibliographic Details
Published inShànghăi jiāotōng dàxué xuébào Vol. 57; no. 9; pp. 1156 - 1164
Main Author LIU Xinyu, WANG Sen, ZENG Long, YUAN Shaoheng, HAO Zhenghang, LU Xinyan
Format Journal Article
LanguageChinese
Published Editorial Office of Journal of Shanghai Jiao Tong University 01.09.2023
Subjects
doubly-fed wind turbines (dfig)
frequency stability
low-frequency oscillation
lyapunov stability
sliding mode control
Online AccessGet full text

Cover

More Information
Summary:Aiming at the problem of weakly or negatively damped low-frequency oscillations caused by cross-zone transmission of electricity from large wind farms, this paper proposes a fast terminal sliding-mode additional damping controller based on the Lyapunov stability theory. By investigating the flexible power regulation characteristics and the capability of dynamic frequency response to damping regulation of doubly-fed wind turbines (DFIG), a rotor magnetic chain controller is designed according to the relationship between the applied voltage and magnetic chain of DFIG rotor and the sliding mode variable structure control method. When low-frequency oscillations occur in the system, the desired magnetic chain value will deviate from the actual magnetic chain value. The additional damping controller outputs an adaptive control signal for the rotor-side power control link to increase the active output of the wind farm and suppress low-frequency oscillations in the system. A simulation model of the wind power grid-co
ISSN:1006-2467
DOI:10.16183/j.cnki.jsjtu.2022.135