TY - JOUR
T1 - Impedance-Based Stability Analysis for Interconnected Converter Systems with Open-Loop RHP Poles
AU - Liao, Yicheng
AU - Wang, Xiongfei
PY - 2020/4
Y1 - 2020/4
N2 - The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right-half-plane (RHP) poles. This article thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.
AB - The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right-half-plane (RHP) poles. This article thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.
KW - Interconnected converters
KW - Right half-plane poles
KW - Bode plots
KW - Impedance-based analysis
KW - Stability
KW - inter-connected converters
KW - right-half-plane (RHP) poles
KW - impedance-based analysis
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85078263531&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2939636
DO - 10.1109/TPEL.2019.2939636
M3 - Journal article
SN - 0885-8993
VL - 35
SP - 4388
EP - 4397
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 4
M1 - 8826385
ER -