TY - GEN
T1 - Optimal Design of the Nonlinear Inductor for MLCL-Filtered Grid-Connected PV Inverter
AU - Zhang, Jiansong
AU - Yang, Xu
AU - Zhou, Hongwei
AU - Lu, Dapeng
AU - Cai, Wenlong
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Under most circumstances, the PV inverter operates under light-load conditions. To reduce current ripple at light-load conditions, nonlinear inductor is widely adopted in the modified LCL (MLCL)-filtered grid-connected PV string inverter. Conventionally, the inductor design is mostly for the fixed value inductance and only considers its performance at the rated power condition. In this paper, a multi-objective optimization model is proposed for the inverter side nonlinear inductor of the MLCL filter to improve system performance in full power range. Optimal objects are the weighted efficiency and the volume of the inductor. Combined with the geometric and electromagnetic constraints, it is used to design the inverter side inductor for a 228 kW MLCL-filtered PV inverter. Furthermore, the design is verified by experiments which shows lower power losses, current ripple and harmonics compared with the conventional design result.
AB - Under most circumstances, the PV inverter operates under light-load conditions. To reduce current ripple at light-load conditions, nonlinear inductor is widely adopted in the modified LCL (MLCL)-filtered grid-connected PV string inverter. Conventionally, the inductor design is mostly for the fixed value inductance and only considers its performance at the rated power condition. In this paper, a multi-objective optimization model is proposed for the inverter side nonlinear inductor of the MLCL filter to improve system performance in full power range. Optimal objects are the weighted efficiency and the volume of the inductor. Combined with the geometric and electromagnetic constraints, it is used to design the inverter side inductor for a 228 kW MLCL-filtered PV inverter. Furthermore, the design is verified by experiments which shows lower power losses, current ripple and harmonics compared with the conventional design result.
KW - MLCL Filter
KW - Nonlinear inductor
KW - Optimal Design
UR - https://www.scopus.com/pages/publications/85182939585
U2 - 10.1109/ECCE53617.2023.10362609
DO - 10.1109/ECCE53617.2023.10362609
M3 - 会议稿件
AN - SCOPUS:85182939585
T3 - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
SP - 5831
EP - 5838
BT - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
Y2 - 29 October 2023 through 2 November 2023
ER -
