This paper investigates the impact of photovoltaic power optimizers on building integrated photovoltaics(BIPV) systems under shading mismatch conditions. First
three different string shading scenarios were designed. Based on the shading ratios on the module surfaces are known
simulations were conducted to compare the power generation with and without the optimizers. Then
an experimental platform was set up to compare the simulated data with the measured data
verifying the accuracy of the simulation model. Finally
the BIPV glass curtain wall of the Antuoshan Photovoltaic Building in Shenzhen was taken as the study object. A comprehensive shading analysis was performed on each module over the course of a year (8
760 hours). The system power generation was discussed under three conditions: without optimizers
with optimizers installed only in shaded areas
and with optimizers installed on all modules. The results indicate that the power optimizer's impact on the power generation of building photovoltaic systems is influenced by shading. In months when the strings are unevenly shaded
installing power optimizers can increase power generation by up to 9.48%. Additionally
when all modules are equipped with optimizers
the overall system power generation increases by 1.13%.
KUHN T E, ERBAN C, HEINRICH M, et al.Review of technological design options for building integrated photovoltaics (BIPV)[J]. Energy and buildings, 2021, 231: 110381.
YU G, YANG H, LUO D, et al.A review on developments and researches of building integrated photovoltaic (BIPV) windows and shading blinds[J]. Renewable and sustainable energy reviews, 2021, 149: 111355.
WU F, WANG Z, LUO S.Buck-boost three-level semi-dual-bridge resonant isolated DC-DC converter[J]. IEEE journal of emerging and selected topics in power electronics, 2020, 9(5): 5986-5995.
SINAPIS K, TSATSAKIS K, DÖRENKÄMPER M, et al. Evaluation and analysis of selective deployment of power optimizers for residential PV systems[J]. Energies, 2021, 14(4): 811.
PEREZ R, STEWART R, ARBOGAST C, et al.An anisotropic hourly diffuse radiation model for sloping surfaces: description, performance validation, site dependency evaluation[J]. Solar energy, 1986, 36(6): 481-497.
ZHANG X, CHEN M, FU Y, et al.A step- down partial power optimizer structure for photovoltaic series-connected power optimizer system[C]// 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC). Shenzhen, China, 2018.