ANTI-WINDUP TECHNIQUES APPLIED TO BUCK-BOOST CONVERTER IN PHOTOVOLTAIC SYSTEMS: A COMPARATIVE STUDY

This work presents an analysis of irradiance and temperature variation effect applied to a solar panel linked by a Buck-Boost converter concerning duty-cycle limits with a PID controller. The study is done numerically with a simulation software using three anti-windup strategies and real data of irradiance and temperature measured by Sistema de Organizacao Nacional de Dados Ambientais/Instituto Nacional de Pesquisas Espaciais (SONDA/INPE). The PID tuning is based on the root locus method for design simplicity with predefined specifications of overshoot and settling time without loss of generality. It is shown that modified anti-windup techniques improve closed-loop performance significantly when radiation decreases due to cloud effect.