TY - JOUR
T1 - Autoidentification Method of the “Trouble Maker(s)” for Internal Instability in Multiparalleled Inverters System
AU - Wu, Weimin
AU - Zhao, Zhijun
AU - Koutroulis, Eftichis
AU - Chung, Henry Shu-Hung
AU - Blaabjerg, Frede
PY - 2022/1/1
Y1 - 2022/1/1
N2 - The instability of power systems comprising multiple LCL-filtered grid-connected dc–ac inverters connected in parallel can be caused by any individual inverter due to mutual coupling through the grid impedance. For the stability analysis of a multiparalleled dc–ac inverters system, an effective technique capable to diagnose which particular inverter (i.e., “trouble maker”) causes instability to the overall system has not been developed yet. In this article, a novel autoidentification method is proposed to detect the “trouble maker(s)” of instability in a multiparalleled inverters system, based on the comparison between the root-mean-square value of harmonic voltage at the point of common coupling and the harmonic voltages across the filters capacitors. The theoretical analysis of the proposed identification method is presented in details in this article. Also, simulation and experimental results are provided for the verification of the effectiveness of the proposed technique.
AB - The instability of power systems comprising multiple LCL-filtered grid-connected dc–ac inverters connected in parallel can be caused by any individual inverter due to mutual coupling through the grid impedance. For the stability analysis of a multiparalleled dc–ac inverters system, an effective technique capable to diagnose which particular inverter (i.e., “trouble maker”) causes instability to the overall system has not been developed yet. In this article, a novel autoidentification method is proposed to detect the “trouble maker(s)” of instability in a multiparalleled inverters system, based on the comparison between the root-mean-square value of harmonic voltage at the point of common coupling and the harmonic voltages across the filters capacitors. The theoretical analysis of the proposed identification method is presented in details in this article. Also, simulation and experimental results are provided for the verification of the effectiveness of the proposed technique.
KW - Autoidentification method
KW - grid-connected dc–ac inverter
KW - internal instability
KW - LCL filter
KW - multiparalleled inverters
UR - http://www.scopus.com/inward/record.url?scp=85100507631&partnerID=8YFLogxK
U2 - 10.1109/TIE.2021.3053881
DO - 10.1109/TIE.2021.3053881
M3 - Journal article
SN - 1557-9948
VL - 69
SP - 18
EP - 28
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 1
M1 - 9339935
ER -