Stability enhancement of droop controlled PV based Microgrid with frequency dependent load

摘要

This paper encompasses a comparative study of the power sharing/ droop controllers for a Low Voltage Microgrid and hence efficacy of the PQF droop control over the conventional P-F droop control and the differentiator based P-F droop is studied. Small signal stability studies are thereby performed to observe the stability limit as the droop gains are varied. Also in this paper, the low frequency oscillations pertaining to induction motor dynamics is studied and hence, extenuation of those oscillations without using a supplementary controller is achieved using the PQF droop control.