Maximum Power Point Tracking for Photovoltaic Systems Using Ripple Correlation Control

Abstract

This paper presents a low-pass filter based ripple correlation control (LPF-RCC) maximum power point tracking (MPPT) in photovoltaic (PV) systems for high power applications. Ripple correlation control is a non-linear and accurate technique of MPPT, which inherently eliminates the steady state oscillations. With the proper tuning of filter coefficients and proportional integral (PI) controller parameters, RCC is able to suppress the transient oscillations effectively. Photovoltaic (PV) system equipped with the boost converter and RCC control strategy has been implemented for various solar irradiance levels at 25°C. This work proposes a low-pass filtered version of RCC with proper tuning of Proportional Controller (PI) to improve transient and tracking performance. Simulation results show that the proposed LPF -based RCC is very much effective in eliminating unwanted ripples from voltage, current and power outputs.