Design of a PV Based Power Supply with a Non-Inverting Buck-Boost Converter

EasyChair Preprint 1708

Abstract

This paper presents the design of a photovoltaic based power supply using a non-inverting buck-boost converter to charge the batteries. The batteries can be used to power a load as back-up power when there is no sunlight. This approach presents a constant output of 48 V charging voltage for the batteries even though the input voltage may vary depending on the amount of solar irradiation falling on the solar panel. This off-grid system can be used to provide power to a small community. Solar charge controllers are important components in such an off-grid system because they can be used to protect the battery bank from overcharging and regulate the charging current. In this paper the buck-boost converter is used as a solar charge controller to maximize the charging time when the solar irradiation provides less than the required output voltage. This increases the required charging voltage to 48 V. The DC-DC converter (buck-boost converter) was modelled using the SIMetrix software to demonstrate the expected output waveforms before building the complete PV power supply.

Keyphrases: DC-DC converter, Photovoltaic (PV) system, SIMetrix software., Solar charge controller, buck-boost converter

@booklet{EasyChair:1708,
  author    = {Kingsley A. Ogudo and Patrice Umenne},
  title     = {Design of a PV Based Power Supply with a Non-Inverting Buck-Boost Converter},
  howpublished = {EasyChair Preprint 1708},
  year      = {EasyChair, 2019}}