Coordinated control system between grid-vsc and a dc microgrid with hybrid energy storage system Articles uri icon

publication date

  • November 2021

start page

  • 1

end page

  • 14

issue

  • 21

volume

  • 10

International Standard Serial Number (ISSN)

  • 2079-9292

abstract

  • Direct current microgrids (DCMGs) are currently presented as an alternative solution
    for small systems that feed sensitive electrical loads into DC. According to the scientific literature,
    DCMG maintains good voltage regulation. However, when the system is in islanded mode, very
    pronounced voltage variations are presented, compromising the system"s ability to achieve reliable
    and stable energy management. Therefore, the authors propose a solution, connecting the electrical
    network through a grid-tied voltage source converter (GVSC) in order to reduce voltage variations.
    A coordinated control strategy between the DCMG and GVSC is proposed to regulate the DC
    voltage and find a stable power flow between the various active elements, which feed the load.
    The results show that the control strategy between the GVSC and DCMG, when tested under
    different disturbances, improves the performance of the system, making it more reliable and stable.
    Furthermore, the GVSC supports the AC voltage at the point of common coupling (PCC) without
    reducing the operating capacity of the DCMG and without exceeding even its most restrictive limit.
    All simulations were carried out in MATLAB 2020.

keywords

  • battery energy storage system; dc microgrid; hybrid energy storage; vsc