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New maximum power point tracker for PV arrays using fuzzy controller in close cooperation with fuzzy cognitive networks

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3 Author(s)
T. L. Kottas ; Dept. of Electr. & Comput. Eng, Democritus Univ. of Thrace, Xanthi, Greece ; Y. S. Boutalis ; A. D. Karlis

The studies on the photovoltaic (PV) generation are extensively increasing, since it is considered as an essentially inexhaustible and broadly available energy resource. However, the output power induced in the photovoltaic modules depends on solar radiation and temperature of the solar cells. Therefore, to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the PV array. In this paper, a maximum power point tracker using fuzzy set theory is presented to improve energy conversion efficiency. A new method is proposed, by using a fuzzy cognitive network, which is in close cooperation with the presented fuzzy controller. The new method gives a very good maximum power operation of any PV array under different conditions such as changing insolation and temperature. The simulation studies show the effectiveness of the proposed algorithm

Published in:

IEEE Transactions on Energy Conversion  (Volume:21 ,  Issue: 3 )