Analysis of Newton-Like Extremum Seeking Control in Photovoltaic Panels

Abstract

The paper adapts the NL-ESC technique to extract the maximum power from photovoltaic panels. This technique uses the gradient and Hessian of the panel characteristic in order to approximate the operation point to the optimum. The paper describes in detail the gradient and Hessian estimations carried out by means of sinusoidal dithering signals. Furthermore, we compare the proposed technique with the common ESC that only uses the gradient. The comparison is done by means of PSIM simulations and it shows the different transient behaviors and the faster response of the NL-ESC solution.