Droop Control based Control technique and Advancements for Microgrid Stability- A Review

Droop control is a technique used in microgrids to manage active power without internal communication. As a result, it lowers the complexity and expense of running the system and raises reliability metrics. Moreover, to ensuring proper power distribution between Distributed generators (DGs), it controls P, Q, V and f. The traditional droop control approach has a number of drawbacks, such as delayed transient dynamics, load reliance on voltage and frequency, limited accuracy on power sharing, poor power quality for non-linear or asymmetrical loads, and circulating current among DGs. Researchers have come up with a variety of control strategies to address the issue, and it is still a compelling topic for them. This paper focuses on various improved droop controllers based on feedback and communication loops to address some of the issues for dealing with such problems.