Design of a Hybrid Energy System with Energy Storage for Standalone DC Microgrid Application
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Date
2021-09-21
Journal Title
Journal ISSN
Volume Title
Publisher
Multidisciplinary Digital Publishing Institute
Abstract
This paper presents microgrid-distributed energy resources (DERs) for a rural standalone
system. It is made up of a solar photovoltaic (solar PV) system, battery energy storage system (BESS),
and a wind turbine coupled to a permanent magnet synchronous generator (WT-PMSG). The DERs
are controlled by maximum power point tracking (MPPT)-based proportional integral (PI) controllers
for both maximum power tracking and error feedback compensation. The MPPT uses the perturb
and observe (P&O) algorithm for tracking the maximum power point of the DERs. The PI gains
are tuned using the Ziegler–Nichols method. The developed system was built and simulated in
MATLAB/Simulink under two conditions—constant load, and step-load changes. The controllers
enabled the BESS to charge even during conditions of varying load and other environmental factors
such as change of irradiance and wind speed. The reference was tracked extremely well by the output
voltage of the DC microgrid. This is useful research for electrifying the rural islanded areas which
are too far from the grid.
Description
Keywords
solar photovoltaic (PV); wind turbine coupled to permanent magnet synchronous generator (WT-PMSG); battery energy storage system (BESS); maximum power point tracking (MPPT); DC/DC converters
Citation
Juma MI, Mwinyiwiwa BMM, Msigwa CJ, Mushi AT. Design of a Hybrid Energy System with Energy Storage for Standalone DC Microgrid Application. Energies. 2021; 14(18):5994. https://doi.org/10.3390/en14185994