I. Introduction
At present-scenario, power system is restructured and integrated more renewable energy sources (RESs) to produce green energy as per requirements of coming generation [1–3]. The RESs are one of the most effective ways to maintain electrical energy demand. RESs are unpredictable in nature [4–6]. These RESs irregularities provide considerable technological challenges for the energy grid's safe, stable, and reliable functioning [2–3]. Recently, a self-sustaining microgrid (MG) has been established as a unique green energy system for energizing remote places, since it makes use of RES’s such as solar and wind [2, 5]. Due to increased incidence of bias in between supply of power and demand of load, frequency changes in Microgrid are a significant issue for reliable, stable, and secure operation. There are several explanations for frequency-deviation in MG, which are: (1) RES's are inherently unreliable; and (2) energy demand in remote places is nonlinear [2].