Auto synchronization of Microgrid with Main Grid after Islanding Operation - A REVIEW

Abstract

This paper provides a review of research concerning thesynchronization technique for microgrid reclosing after
islanding operation. It offers a brief review on some of the published work on control for grid connected and intentional
islanding operations of microgrid.
The future electric grid concept will cover some small parts to be disconnected and work in an autonomous way isolated
from the main utility. Control of microgridscomposed by the couple distributed sources-local loads – with the competence of
operating in grid-connected and island mode is a trending research area. The presence of an efficient algori thm for
synchronizing the microgrid with the main grid every time the reclosure is allowed is crucial for assuring a safe
operation.DG units are significantly and conceptually very different from conventional power system in terms of load
characteristics, power quality constraints, market participation strategies and the control and operational strategies.