Design and Simulation of an MPPT Charge Controller for a PV Application

Dam-Bé L. Douti,Edjadessamam Akoro,Bidjagare Akiza

doi:10.52825/thwildauensp.v1i.23

Dam-Bé L. Douti, Edjadessamam Akoro + Show 1 more

Open Access

https://doi.org/10.52825/thwildauensp.v1i.23

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Abstract

In this document, we propose an MPPT charge controller based on the two-phase charging method proposed by the datasheet of the battery under test. Also, for efficient and optimal charge the charge controller reacts with better exploitation of the available photovoltaic (PV) power by means of a maximum power point tracking (MPPT) technique employed in the control algorithm especially the Perturb and observe (P&O) techniques; when threshold voltage reach, the regulation phase start. The MPPT and converter efficiency are respectively 98.7% and 98.2% at the standard test condition (STC).

Highlights

Autonomous photovoltaic systems with storage have become more and more widespread in recent years, especially in rural areas isolated from the local energy distribution network
Lead-acid batteries have a high number of cycles and represent about 15% of the initial investment but over an operating lifetime of twenty years, they could exceed 50% of the overall cost of the system ; it is important to increase the life of the component to lower the cost of the energy produced[2]. It requires an optimal use of these batteries, that is to say a charge/discharge controller. It is in this sense that we present in this document an algorithm for charging a lead-acid battery based on the maximum power point tracking (MPPT) method
The MPPT commands will continuously adjust the duty cycle associated to the static converter that charges the battery

Summary

Introduction

Autonomous photovoltaic systems with storage have become more and more widespread in recent years, especially in rural areas isolated from the local energy distribution network. The type of storage generally used in these systems are lead-acid batteries. The maturity of this technology and its low cost are the main reasons[1]. It requires an optimal use of these batteries, that is to say a charge/discharge controller It is in this sense that we present in this document an algorithm for charging a lead-acid battery based on the (maximum power point tracking) MPPT method. This algorithm allows us to reach a state of charge of 100% while not exceeding the charge threshold voltage

Principle of an MPPT

Design and sizing of a PV system charge controller

The algorithm of the MPPT charge regulator

Findings

Conclusion