Review of the Virtual Inertia Strategies from Intermittent Renewable Energy Resources on the Power System

Estimation of virtual inertia in grid-connected renewable energy resources is the primary challenge faced by researchers in the field of load frequency control in the modern power system. The main objective of this study is to review the strategies of virtual inertia, which are used to compensate for the required inertia to reduce frequency deviation. The stability issue regarding virtual inertia estimators integrated with power system is also a challenge, which is reviewed in this study. A modified power system based on an inertia estimator with a compensator is suggested using the modified techniques presented in recent manuscripts. The most published manuscripts in the field of the following scenarios: (i) load frequency control with renewable energy resources and (ii) load frequency control with virtual inertia are statistically analyzed and the high cited manuscripts related to these research gaps are discussed in detail. The new direction of this review study is suggested to continue improving the virtual inertia estimators by authors.