Analysis of the Optimal Sampling Rates for dP-P&O Algorithm in Applications with Low Frequency Ripple

Authors

  • André Salume Lima Ferreira Leão Postgraduate Program in Electrical Engineering, Federal University of Espírito Santo
  • André Luiz Silva Crivellari Postgraduate Program in Electrical Engineering, Federal University of Espírito Santo
  • Duarte Manuel do S. Raposo Postgraduate Program in Electrical Engineering, Federal University of Espírito Santo
  • Walbermark M. dos Santos Postgraduate Program in Electrical Engineering, Federal University of Espírito Santo

Keywords:

dP-P&O, Perturb and Observe (P&O), Hill Climbing (HC), Sampling Rate, Low Frequency Ripple, Single-Phase Grid-Connected PV Inverter

Abstract

The article presents an analysis on PV power ripple behavior in order to define the better sampling rates values for the dP-P&O MPPT method, especially in applications with low frequency ripple. It is proposed a design consideration that is capable of reducing dP error in this types of applications, such as PV single-phase grid-tied inverters, without filtering or averaging. Simulations were made to verify the algorithm performance on different sampling rates. The simulations were carried on Virtual Typhoon-HIL, considering a PV array, submitted to some irradiance profiles from the EN 50530 standard, connected to a boost converter with its output connected to a DC bus with a 120 Hz ripple, representing the first stage of a dual-stage single-phase PV inverter. The sampling rates values pointed out as optimal were the only ones capable of making the algorithm dP-P&O works properly, with high performance (ηmppt>99.5%).

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Published

2024-10-18

Issue

Vol. 4 No. 1 (2024): CBA2024

Section

Articles