Abstract
Multiple microgrids (MGs) close to each other can be interconnected to construct a cluster to enhance reliability and flexibility. This paper presents a comprehensive and comparative review of recent studies on DC MG clusters’ control strategies. Different schemes regarding the two significant control aspects of networked DC MGs, namely DC-link voltage control and power flow control between MGs, are investigated. A discussion about the architecture configuration of DC MG clusters is also provided. All advantages and limitations of various control strategies of recent studies are discussed in this paper. Furthermore, this paper discusses three types of consensus protocol with different time boundaries, including linear, finite, and fixed. Based on the main findings from the reviewed studies, future research recommendations are proposed.
Highlights
Strategies of DC Microgrids Cluster: The centralized power grid is a solitary method that has been used for many decades to transport energy, with power plants located widely around the country generating electricity and transmission lines conveying it to businesses and homes over lengthy distances [1]
It is found that there are different aspects required to be deemed in the DC MG cluster, including power exchange among the participant MGs and voltage regulation of DC-link, which needs to be regulated efficiently to achieve good coordination of all MGs in a cluster under various operating conditions, including load changes, renewable energy sources (RESs) variations, and outages and this is the main purpose of using different control strategies in the literature
From the tables mentioned above, it can be noticed most of the articles are characterized by the following: Most of the articles ignored the nature of DGs and their uncertainty, which is considered important when trying to mimic the behavior of a real power grid
Summary
Strategies of DC Microgrids Cluster: The centralized power grid is a solitary method that has been used for many decades to transport energy, with power plants located widely around the country generating electricity and transmission lines conveying it to businesses and homes over lengthy distances [1]. To satisfy the increasing power demand and address the issues such as losses in lengthy transmission lines, dwindling fossil fuel resources, and environmental concerns, distributed generation units (DGU) using renewable energy sources (RESs) are becoming increasingly popular in recent years [4]. Much effort has been focused on the production of electricity from environmentally friendly DGUs and their technologies throughout many countries [5,6,7]
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