MPPT METHOD BASED ON EXTERNAL CHARACTERISTICS OF PARALLELED PV MODULES

Xie Luyao; Mo Chenfei; Chen Yi

doi:10.19912/j.0254-0096.tynxb.2020-0746

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 148-153. DOI: 10.19912/j.0254-0096.tynxb.2020-0746

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

MPPT METHOD BASED ON EXTERNAL CHARACTERISTICS OF PARALLELED PV MODULES

Xie Luyao¹, Mo Chenfei¹, Chen Yi²

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Abstract

Global maximum power point（MPP） of paralleled photovoltaic（PV） modules will change with their shading conditions. In order to maximize solar power generation, maximum power point tracking（MPPT） methods are required to lock the global MPP of the paralleled PV modules quickly and accurately in all the time. The paralleled PV modules will show different external characteristics when they are under different shading conditions. For example, the current-voltage characteristics have several steps and the power-voltage characteristics have several peaks. An MPPT method based on the external characteristics of the paralleled PV modules is proposed by utilizing such a phenomenon. Both the theoretical analysis and simulation results show that the proposed method can avoid falling into local MPPs. Moreover, it can track the global MPP smoothly, quickly, and accurately under the conditions of non-shading, static shading, and dynamic shading.

Key words

PV modules / MPPT / current voltage characteristics / power voltage characteristics

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Xie Luyao, Mo Chenfei, Chen Yi. MPPT METHOD BASED ON EXTERNAL CHARACTERISTICS OF PARALLELED PV MODULES[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 148-153 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0746

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