Improved Secondary Network Voltage Control with Stability Analysis for PV Based Microgrid

Microgrid (MG) creates an alternative way to utilize renewable energy sources to meet the increasing demand of consumers. The generation of power in this arena solely depends on various meteorological factors that may reason to break down the MG performance. Additionally, the operation of MG is subjected to various load dynamics and may alter the system state that restricts the tracking function of the MG. This paper contributes to develop a novel model reference modified fractional order PID (MR-FOPID) controller to address the tracking issue over the various load dynamics and meteorological factors of PV panel. The controller consists of an MRAC and fractional order PID controller. The tracking capability of the MR-FOPID framework is studied by considering the number of load dynamics in the three-phase secondary network installed in PV based MG system. Additionally, a theoretical stability analysis is also carried out in this paper to find the closed-loop stability region.