Open AccessImproved active power dynamic response of voltage‐controlled doubly fed induction generator
Author(s) -
Xie Zhen,
Gao Xiang,
Li Zhe,
Ma Mingyao,
Zhang Xing
Publication year - 2021
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/elp2.12122
Subject(s) - control theory (sociology) , induction generator , ac power , overshoot (microwave communication) , voltage , doubly fed electric machine , frequency response , cascade , phase locked loop , robustness (evolution) , engineering , computer science , electronic engineering , control (management) , jitter , electrical engineering , biochemistry , chemistry , artificial intelligence , chemical engineering , gene
The voltage‐controlled doubly fed induction generator (VC‐DFIG) is widely studied because of its self‐synchronous control characteristics and its ability to actively support the grid voltage and frequency. However, the VC‐DFIG is a multi‐loop and cascade‐controlled system, and the bandwidth design of each control loop is difficult. When the power instruction and grid frequency disturbances occur, the improper bandwidth designs will cause severe oscillation and overshoot. In this study, the Thevenin equivalent voltage model of DFIG is derived, combined with the characteristics of voltage control, and the control structure of VC‐DFIG is constructed. On this basis, a small signal model of active power dynamic response is established, which includes the characteristics of the voltage control loop and active power loop. For the parameter robustness and dynamic response of VC‐DFIG, the frequency damping control strategy and the lead‐lag correction control strategy are proposed. Finally, the enhanced VC‐DFIG technology was realised through the 2.0 MW DFIG experimental platform, and the effectiveness of the two proposed control strategies were verified.