AUTHOR=Yaqoob Salam J. , Arnoos Husam , Qasim Mohammed A. , Agyekum Ephraim B. , Alzahrani Ahmad , Kamel Salah 

TITLE=An optimal energy management strategy for a photovoltaic/li-ion battery power system for DC microgrid application

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2023

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.1066231

DOI=10.3389/fenrg.2022.1066231

ISSN=2296-598X

ABSTRACT=The research presented here aims to provide a flatness-based energy management strategy (EMS) for a hybrid photovoltaic-battery system. In the proposed energy method, DC/DC converters are used to configure both the photovoltaic (PV) system and the Li-ion battery. Our goal is to use nonlinear flatness theory to develop an efficient EMS plan that will, among other things, provide a stable bus voltage and a predetermined power share between the solar array and the battery. The suggested EMS is responsible for balancing the power reference between the PV system and the battery while keeping the DC bus voltage steady and performing at its best. In order to maximize the PV’s power, a variable step size perturb and observe (VSSP&O) maximum power point tracking (MPPT) method with a DC/DC boost converter was used. Moreover, a DC/DC bidirectional converter was developed In order to control the required battery’s power. As a result, the proposed system was verified in a MATLAB®/Simulink-based simulation environment by subjecting it to a variety of scenarios, including those with varying degrees of illumination and sudden changes in load. The obtained results show that the proposed EMS was able to keep the bus voltage stable despite changes in load or solar radiation. Furthermore, the EMS technique also guaranteed excellent power quality by minimizing bus voltage spikes, which helped the battery operation in terms of lifetime, and efficiency.