TY - JOUR
T1 - Elimination of photovoltaic mismatching with improved submodule differential power processing
AU - Chu, Guanying
AU - Wen, Huiqing
AU - Yang, Yong
AU - Wang, Yiwang
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2020/4
Y1 - 2020/4
N2 - Differential power processing (DPP) is a promising architecture to solve the issue caused by mismatches among photovoltaic (PV) submodules. To eliminate the mismatch power losses, this paper presents an optimized PV-to-bus DPP system with submodule-level individual maximum power point tracking (MPPT) and module-level minimum-power tracking (MPT) simultaneous implementation according to the built mathematical model of the power processed by DPP converters with respect to the string current. Furthermore, a flexible time-sharing algorithm is adopted to reduce the number of MPPT units. Compared with other solutions, such as PV optimizer, the proposed scheme can reduce the effects of mismatches to the minimum regardless of mismatch conditions. The system cost is reduced since only one adaptive MPPT controller is required. Besides, the system efficiency is improved due to the true MPPT implementation and MPT control. Both simulation and experimental tests are provided to validate the effectiveness of the proposed scheme.
AB - Differential power processing (DPP) is a promising architecture to solve the issue caused by mismatches among photovoltaic (PV) submodules. To eliminate the mismatch power losses, this paper presents an optimized PV-to-bus DPP system with submodule-level individual maximum power point tracking (MPPT) and module-level minimum-power tracking (MPT) simultaneous implementation according to the built mathematical model of the power processed by DPP converters with respect to the string current. Furthermore, a flexible time-sharing algorithm is adopted to reduce the number of MPPT units. Compared with other solutions, such as PV optimizer, the proposed scheme can reduce the effects of mismatches to the minimum regardless of mismatch conditions. The system cost is reduced since only one adaptive MPPT controller is required. Besides, the system efficiency is improved due to the true MPPT implementation and MPT control. Both simulation and experimental tests are provided to validate the effectiveness of the proposed scheme.
KW - Differential power processing (DPP)
KW - PV-to-bus
KW - efficiency
KW - minimum-power tracking (MPT)
KW - photovoltaic (PV) mismatch
UR - http://www.scopus.com/inward/record.url?scp=85076640853&partnerID=8YFLogxK
U2 - 10.1109/TIE.2019.2908612
DO - 10.1109/TIE.2019.2908612
M3 - Article
AN - SCOPUS:85076640853
SN - 0278-0046
VL - 67
SP - 2822
EP - 2833
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 4
M1 - 8683994
ER -
