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 journalArticle

531 Citations (Scopus)


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.

Original languageEnglish
Article number5688336
Pages (from-to)1010-1021
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - 2011



  • Maximum power point tracking (MPPT)
  • perturb and observe (P&O)
  • photovoltaic (PV)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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