2019 | vol. 67 | nr. 4 | art. 2

A New Technique for Photovoltaic System Efficiency under Fast Changing Solar Irradiation

Abdellatif MAHAMMEDI, Abdellah KOUZOU, Ahmed HAFAIFA, Billel TALBI
Maximum power point tracking (MPPT) techniques play an important role in efficiency improvement of photovoltaic systems. But, the fast variation of solar irradiation affects the work of these techniques, which degrades the efficiency of these systems. To treat this problem, the present paper proposes a simple MPPT algorithm based on developing a formula for calculating the duty cycle of the converter. This method is based on the verity that the power slope of the PV is null at MPP. This technique consists on an improved INC algorithm, which is used to avoid the poor tracking of the MPP under fast changing irradiance and the high-power oscillation in steady state. The proposed method is verified and simulated. The simulation showed that the response of the proposed algorithm only needs 22% of the time taken by the conventional incremental conductance algorithm to track the maximum power point (MPP) during solar irradiation variation. In addition, the proposed technique shows a negligent oscillation in the power generated after tracking the maximum power point (MPP).
Keywords: Photovoltaic system; MPPT; incremental conductance, boost converter, fast convergence
To cite this article: MAHAMMEDI A., KOUZOU A., HAFAIFA A., TALBI B., “A new technique for a good efficiency of photovoltaic system under fast changing solar irradiation”, in Electrotehnica, Electronica, Automatica (EEA), 2019, vol. 67, no. 67, pp. 12-19, ISSN 1582-5175.