TY - JOUR
T1 - Impedance Reshaping Band Coupling and Broadband Passivity Enhancement for DFIG System
AU - Hu, Bin
AU - Nian, Heng
AU - Li, Haipan
AU - Chen, Liang
AU - Sahoo, Subham
AU - Blaabjerg, Frede
PY - 2023/8
Y1 - 2023/8
N2 - Doubly fed induction generator (DFIG) based wind power systems incur a broadband negative resistive characteristic, resulting in resonance risks when connected with weak grid or diverse grid transmission infrastructure. The dominant factor and underlying mechanism of this broadband negative resistive characteristic are analyzed based on the passivity-based stability assessment. It is then noticed that the negative resistive region within low frequency, middle frequency, and high frequency are closely linked to the current controller, phase locked loop, and system delay, respectively. This article reveals the impedance reshaping band coupling phenomenon to facilitate some passivity-based designs, then puts forward a broadband passivity enhancement method for DFIG system. The experimental results validate the aforementioned conclusions and the effectiveness of the proposed passivity enhancement method.
AB - Doubly fed induction generator (DFIG) based wind power systems incur a broadband negative resistive characteristic, resulting in resonance risks when connected with weak grid or diverse grid transmission infrastructure. The dominant factor and underlying mechanism of this broadband negative resistive characteristic are analyzed based on the passivity-based stability assessment. It is then noticed that the negative resistive region within low frequency, middle frequency, and high frequency are closely linked to the current controller, phase locked loop, and system delay, respectively. This article reveals the impedance reshaping band coupling phenomenon to facilitate some passivity-based designs, then puts forward a broadband passivity enhancement method for DFIG system. The experimental results validate the aforementioned conclusions and the effectiveness of the proposed passivity enhancement method.
KW - Broadband Passivity Enhancement Method
KW - Doubly-Fed Induction Generator
KW - Grid Tied Converters
KW - Impedance Reshaping
KW - Negative Resistive Characteristic
KW - Phase Locked Loop
KW - Power Electronics
UR - http://www.scopus.com/inward/record.url?scp=85159648289&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2023.3270364
DO - 10.1109/TPEL.2023.3270364
M3 - Journal article
SN - 0885-8993
VL - 38
SP - 9436
EP - 9447
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 8
M1 - 10108035
ER -