High-performance adaptive Perturb and observe MPPT technique for photovoltaic-based microgrids

Ahmed K. Abdelsalam, Ahmed M. Massoud, Shehab Ahmed, Prasad N. Enjeti

Research output: Contribution to journalArticlepeer-review

620 Scopus citations

Abstract

Solar photovoltaic (PV) energy has witnessed double-digit growth in the past decade. The penetration of PV systems as distributed generators in low-voltage grids has also seen significant attention. In addition, the need for higher overall grid efficiency and reliability has boosted the interest in the microgrid concept. High-efficiency PV-based microgrids require maximum power point tracking (MPPT) controllers to maximize the harvested energy due to the nonlinearity in PV module characteristics. Perturb and observe (P&O) techniques, although thoroughly investigated in previous research, still suffer from several disadvantages, such as sustained oscillation around the MPP, fast tracking versus oscillation tradeoffs, and user predefined constants. In this paper, a modified P&O MPPT technique, applicable for PV systems, is presented. The proposed technique achieves: first, adaptive tracking; second, no steady-state oscillations around the MPP; and lastly, no need for predefined system-dependent constants, hence provides a generic design core. A design example is presented by experimental implementation of the proposed technique. Practical results for the implemented setup at different irradiance levels are illustrated to validate the proposed technique. © 2011 IEEE.
Original languageEnglish (US)
JournalIEEE Transactions on Power Electronics
Volume26
Issue number4
DOIs
StatePublished - Jun 20 2011
Externally publishedYes

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