Open AccessTopology and control strategy of power optimisation for photovoltaic arrays and inverters during partial shading
Author(s) -
Hu Keyong,
Li Wenjuan,
Wang Lidong,
Zhu Fangming,
Shou Zhouxiang
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1917
Subject(s) - photovoltaic system , topology (electrical circuits) , shading , power (physics) , maximum power point tracking , maximum power principle , grid connected photovoltaic power system , network topology , computer science , engineering , population , electronic engineering , control theory (sociology) , control (management) , electrical engineering , voltage , inverter , physics , computer graphics (images) , quantum mechanics , artificial intelligence , demography , sociology , operating system
In the outside environment, the partial shading on the photovoltaic (PV) arrays occurs frequently and the generated power of PV arrays is far lower than the rated power of inverters, thereby it will cause the total output power of PV system decline sharply. In this study, a flexible topology structure of PV power generation network, connecting PV arrays and inverters by the switching matrix is presented. Then, it introduces the working principle of topology structure and puts forward the corresponding multi‐population genetic algorithm to realise the group management of the multi‐objective control, so as to achieve the power matching optimisation between PV arrays and inverters during partial shading. Finally, the simulation and experiment show that the conversion efficiency of PV system used by the control strategy is much better than that of conventional distributed structure of PV power for the shade of PV arrays, and provide a new way for the effective use of solar energy.