## 6 Comparison with Recently Conducted Reviews  
In recent times, different reviews treating various aspects of hybrid microgrids are presented. For example, reference [109] presents a detailed review of uncertainties (only) associated with renewable energy resources-incorporated hybrid AC/DC microgrids to guarantee their optimal operation. In [110], major challenges faced in developing AC/DC microgrids built purposely to ensure a sustainable electricity system were exploited. Reference [111] presents merely a review of well-established different mathematical optimization techniques applied to one of the complex processes of microgrid, i.e., planning. Similarly, in reference [112], a review of optimization techniques, majorly the metaheuristics including ant colony optimization (ACO), GA, PSO, simulated annealing (SA), differential evolution (DE), and so on is described for microgrids embedded with hybrid energy systems (HES) to ensure economical and reliable dispatch of the resources. In [113], a comprehensive review of power management techniques of hybrid energy systems in microgrids is presented. A review of different forms (variants) [114] and hybrid forms [115] of PSO was presented to figure out the economic dispatch problems. Reference [116] provides a review of the techniques, issues, and future directions regarding the protection of distributed generation hybrid AC/DC microgrids. In [117], a comprehensive review of distributed control methods for isolated microgrids is presented. All the protocols such as linear, heterogeneous, and finite-time consensus involved in cooperative control are detailed comprehensively. As can be observed, these review papers cover one of the key parameters associated with microgrids at a time.  
Table 5 presents a comparison of this review paper with other recent surveys regarding the hybrid microgrid. It shows that this paper encompasses all the major research areas regarding hybrid microgrids, discusses the relevant studies, and promotes future research directions. It also helps to identify the trending research areas where novel research has recently picked up the pace. The protection issues regarding hybrid microgrid, the strategies regarding integration of microgrids with help of interlinking converters and robust uncertainty optimization techniques, design techniques, nonlinear load handling, and droop control mechanism are the popular research areas regarding the hybrid microgrids, established by this table with the help of comparison with other surveys.  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Reference** & **Problem** & **Proposed Solution Strategy** \\ \hline
[105] & High operation costs while providing purified water & Real-time supervisory control on all present \\  & to the remote communities, sustaining practical & controllers of a system in both demand and \\  & functioning parameters of microgrid, and meeting & generation sides \\  & consumer preferences & Zero dynamics-based mathematical equation for all \\  & Delivering an anticipated power-sharing and & the converters used in a system-based controller \\  & uniform dc-link voltage for a distributed energy & A user-friendly power supply, which generates \\  & storage system during load changes & power from renewable power generation systems \\  & & using microgrid topology \\ \hline \hline \end{tabular}
\end{table}
Table 4: \(Cont.\)