MPPT of Photovoltaic Power Generation Based on Double Fuzzy Controllers

Abstract:

This paper mainly discussed the non-linear characteristics of photovoltaic cell and the importance of maximum power point tracking (MPPT) strategy. Most of MPPT control methods had the shortcomings of inaccuracy, tardiness, complexity and big fluctuations nearby the MPP which greatly reduced the efficiency of large photovoltaic power generation system. Double fuzzy logic control (DFLC) method can solve this problem The judgment condition of choosing FLC was listed in which FLC 1 targeted to less shake and made the curve become more smooth and steady nearby the MPP, FLC 2 was combined by fuzzy control and PID algorithm, and both of them aim to realize the optimization control of PV system. The results of simulation show that the proposed control strategy can track the MPP of PV system very accurately and quickly along with the rapid change of the ambient environment.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 3438-3441
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.3438
• Online since: October 2011
• Authors: Yun Liang Wang, Jun Di Xie
• Keywords: Fuzzy Control, Fuzzy PID-Control, Maximum Power Point Tracking (MPPT), Photovoltaic (PV)

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