TY - GEN
T1 - A DAB-Based Single-Stage Three-Phase Microinverter with Grid Current Optimization
AU - Zhao, Zhongtao
AU - Xue, Ruinan
AU - Wang, Panbao
AU - Xu, Dianguo
AU - Wang, Wei
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - This paper proposes a dual active bridge (DAB)-based single-stage isolated three-phase microinverter, which has excellent performances in terms of efficiency, grid-connected current quality, and power density. Firstly, it adopts a "4-in-1"structure to improve the power level. The microinverter can be connected with four PV panels and realize the four-channel independent maximal power point tracking (MPPT), which can improve the power yield under partially shaded conditions. Besides, this paper proposes a space vector single phase-shifted (SVPWM-SPS) modulation strategy based on the evaluation of the modulation index, which can achieve the modulation index matching with grid-connected current. It effectively reduces the total harmonic distortion (THD) of grid current. Finally, a 2.6kW microinverter simulation model is built to verify the effectiveness of the topology and control strategy.
AB - This paper proposes a dual active bridge (DAB)-based single-stage isolated three-phase microinverter, which has excellent performances in terms of efficiency, grid-connected current quality, and power density. Firstly, it adopts a "4-in-1"structure to improve the power level. The microinverter can be connected with four PV panels and realize the four-channel independent maximal power point tracking (MPPT), which can improve the power yield under partially shaded conditions. Besides, this paper proposes a space vector single phase-shifted (SVPWM-SPS) modulation strategy based on the evaluation of the modulation index, which can achieve the modulation index matching with grid-connected current. It effectively reduces the total harmonic distortion (THD) of grid current. Finally, a 2.6kW microinverter simulation model is built to verify the effectiveness of the topology and control strategy.
KW - dual active bridge
KW - modulation index
KW - single-stage converter
KW - SVPWM
KW - three-phase microinverter
UR - https://www.scopus.com/pages/publications/105018114313
U2 - 10.1109/ICIEA65512.2025.11148771
DO - 10.1109/ICIEA65512.2025.11148771
M3 - 会议稿件
AN - SCOPUS:105018114313
T3 - 2025 IEEE 20th Conference on Industrial Electronics and Applications, ICIEA 2025
BT - 2025 IEEE 20th Conference on Industrial Electronics and Applications, ICIEA 2025
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 20th IEEE Conference on Industrial Electronics and Applications, ICIEA 2025
Y2 - 3 August 2025 through 6 August 2025
ER -