Modeling and Simulation of MPPT for Photovoltaic (PV) Array under Partially Shaded Conditions

Guo Zhao; Xue Liang Huang; Yong Zhao

doi:10.4028/www.scientific.net/AMR.512-515.97

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Modeling and Simulation of MPPT for Photovoltaic (PV) Array under Partially Shaded Conditions
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 512-515Modeling and Simulation of MPPT for Photovoltaic...

Modeling and Simulation of MPPT for Photovoltaic (PV) Array under Partially Shaded Conditions

Abstract:

Based on tow-diode model of PV cells, the simulation model of PV array is established. This simulation model can simulate the output characteristics of PV array according to different shading conditions. The output power-voltage curve of PV array may have multiple local Maximum Power Points (MPPs) due to the partial shading. As a result, traditional maximum power point tracking (MPPT) algorithms can easily fail to track global MPP, this can be one of main causes for reduced energy. In order to overcome this drawback, an improved global scanning MPPT algorithm is proposed. Moreover, Matlab-based model is established. It is verified by simulation results carried out that this improved MPPT algorithm is effective to track the global MPP.