Comparative Analysis of the Modified Perturb & Observe with Different MPPT Techniques for PV Grid Connected Systems

Saad A. Mohamed Abdelwahab, Abdallah Mohamed Hamada, Walid S.E. Abdellatif

Abstract


The maximum power point tracking (MPPT) techniques are used in photovoltaic (PV) systems to fully utilize the PV array output power that depends on the change in PV radiation and ambient temperature. In this paper, modified perturb and observe (MP&O) algorithm is proposed to be more efficient for MPPT of grid-connected PV system. The results of this MP&O algorithm are shown to track the maximum energy under fast-changing weather conditions at two cases of solar radiation changes, the first case is the solar radiation change in ramp mode, and the second case is the displaying under random change of solar radiation. The maximum power point (MPP) can be obtained by controlling the operating period that is fed on the MOSFET gate within the boost converter. In addition, the control technique used with the three-phase inverter is a dynamic-based PI controller. The MP&O algorithm is built on the determination of the maximum effective point on the property curve and is similar to the traditional scheme. The idea of this comparison is to use the change in solar radiation to determine the difference between the working point of PV solar array and the number of sectors. The performance is estimated and compared by mathematical investigation and simulation analysis. The proposed method offers high performance and accurate tracking in rapidly varying weather environments.


Keywords


Maximum power point trackingM; perturb and observe algorithm; MP&O and grid connected PV system

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v10i1.10375.g7850

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