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      • A Novel Single-Voltage-Sensor-Based Maximum Power Point Tracking Method

        Xiang-Dong Sun,Mikihiko Matsui,Kouji Yanagimura 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-

        A novel maximum power point tracking method for photovoltaic systems based on a single voltage sensor is proposed in this paper. By means of the simulation studies with PSIM software, it has been found that there are similar relationship curves between the expression (C-d)ㆍ(-ΔVPV)and the actual power PPV of a photovoltaic array regardless of the chopper stage topology connected to the array. Therefore the maximum power point tracking based on PPV is replaced with the expression (C-d)ㆍ(-ΔVPV). For the purpose of diminishing the power fluctuation in the steady state, the averaged voltages of a photovoltaic array and the average duty ratios are used for the calculation. Experimental results obtained on a 50W prototype of a lead acid battery charger show high performance such as the less power fluctuation and the less ambient, i.e. irradiation and temperature, influence.

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