Control and Protection of Hybrid Smart-grid Power System: A Review

With the emergence of distributed generation the idea of smart microgrid is gaining popularity. Smart microgrid control and protection techniques are an emerging field of research. DC smart microgrids have shown prevalence over AC smart microgrids with respect to quality, productivity, control, sustainable energy sources, and association of DC loads. A huge volume of articles have been reviewed on the control strategies of the microgrids. The control of smart microgrids contains three categories, which are primary, auxiliary, and tertiary control layers. Design and protection for DC microgrids are vast challenges. In this paper, the protections of DC microgrids are investigated from a number of elements including DC fault current, grounding systems, methods of fault detection, and self-protective devices. The DC microgrid has emerged as a normal distribution network due to its brilliant performance. This paper reviewed and listed protection and control strategies, which help researchers to have awareness on DC microgrid safety and control.