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Highly Efficient Analog Maximum Power Point Tracking (AMPPT) in a Photovoltaic System

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4 Author(s)
Chih-Yu Yang ; Institute of Electrical Control Engineering, National Chiao Tung University, Hsinchu, Taiwan ; Chun-Yu Hsieh ; Fu-Kuei Feng ; Ke-Horng Chen

A compact-size analog maximum power point tracking (AMPPT) technique is proposed in this paper for high power efficiency in the photovoltaic (PV) system. Combining existing MPPT approaches, we present a fast and accurate tracking performance. Here, a wide-range current multiplier, which tracks the maximum power point (MPP) in the solar power system, is implemented to detect the power slope condition of the solar panel. Experimental results show that the proposed technique can rapidly track the MPP with a high tracking accuracy of 97.3%. Furthermore, the proposed system can connect to the grid-connected inverter to supply ac power.

Published in:

IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:59 ,  Issue: 7 )