Topology and control strategy of power optimisation for photovoltaic arrays and inverters during partial shading. Issue 1 (20th September 2017)

• Record Type: Journal Article
• Authors: Hu, Keyong; Li, Wenjuan; Wang, Lidong; Zhu, Fangming; Shou, Zhouxiang
• Is Part Of: IET generation, transmission & distribution. Volume 12:Issue 1(2018)
• Page Start: 62
• Page End: 71
• Publication Date: 2017-09-20
• Subjects: solar cell arrays -- invertors -- photovoltaic power systems -- genetic algorithms -- matrix algebra -- power generation control -- power control; control strategy -- photovoltaic arrays -- inverters -- partial shading -- PV arrays -- PV system -- flexible topology structure -- PV power generation network -- switching matrix -- multipopulation genetic algorithm -- group management -- multiobjective control -- power matching optimisation -- solar energy; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2016.1917
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : 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.