Protection Strategies for an AC Microgrid: A Comprehensive Review

The microgrid is evolved into a conventional distribution network as it enhances the reliability. However, the protection system requires more attention because of a micro-grid's bi-directional power flow and rising integration level. Hence, this study mainly focused on the issues, challenges, and solutions associated with the protection schemes for microgrids and the existing systems' research gaps. This paper reviews recent literature on the conventional and modern techniques- based protection schemes of the AC microgrids. Additionally, it also includes the current status of the research and the challenges under different operating conditions in the AC microgrid.