# Hybrid Renewable Energy Systems--A Review of Optimization Approaches and Future Challenges
## 5 Suggestions from Previous Research
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline
**Topic** & **Article, Year of the Publication** & **Suggestions for Future Research** \\ \hline \multirow{6}{*}{System Optimization and Modeling} & [90], (2021) & Optimization of component sizes and control strategies via Genetic Algorithm. \\  & [62], (2021) & Supply chain optimization and advanced system integration theories. \\  & [68], (2024) & Development of grid-connected microgrid systems. \\  & [31], (2024) & Continuous search space and thermal energy storage modeling for energy and economic benefits. \\ \hline \multirow{6}{*}{Reliability and Uncertainty Analysis} & [57], (2020) & Expansion to larger-scale systems with advanced energy conversion/storage technologies for reliability and stability. \\  & [50], (2021) & Reliability/cost assessment under uncertainties in load and renewable resources using computationally intensive and time-consuming algorithms like MCS. \\  & [67], (2022) & Probabilistic reliability assessment and control strategies in distributed generation. \\  & [91] (2024) & Risk and uncertainty analysis for microgrid reliability evaluation. \\ \hline \multirow{6}{*}{Integration of Renewable Energy Sources} & [56], (2020) & Feasibility of energy systems in other locations. \\  & [49], (2022) & Optimization of solar–wind HRES for electric vehicle charging stations. \\  & [7], (2023) & Integration of biomass and geothermal energy in multigenerational systems. \\  & [53], (2023) & Involving geothermal heat and wave power in RES analysis. \\  & [60], (2024) & Implementation of combined heat and power in industrial HRES. \\ \hline \multirow{2}{*}{Data and Monitoring Systems} & [38], (2023) & Importance of monitoring solar and tidal resources for system optimization. \\  & [48], (2024) & Continuous monitoring of battery charging and discharging rates. \\ \hline \multirow{6}{*}{Demand-Side Management} & [47], (2021) & Incorporating interactive community responses and incentive-based demand response. \\  & [37], (2021) & Game-theory-based demand response for realistic microgrid scheduling. \\  & [60], (2024) & Demand-side management in hybrid industrial systems. \\  & [83], (2022) & To stagger the demand with proportional increases, the stochastic variation of resources and their repercussions on the electrical network capacities. \\ \hline \multirow{6}{*}{Advanced Optimization Techniques} & [92], (2020) & Multi-objective optimization for green hydrogen energy systems. \\  & [20], (2023) & Application of advanced algorithms to improve energy system optimization accuracy such as MOPSO and NSGA-II algorithms. \\  & [40], (2023) & Combining MOPSO with harmony search and cuckoo search algorithms. \\ \hline \multirow{6}{*}{Technology Improvements} & [44], (2023) & Focus on advanced battery technologies for power management. \\  & [48], (2024) & Incorporation of Zn-ion batteries in energy storage systems. \\  & [63], (2024) & Transition from polymer electrolyte membrane to alkaline electrolyzers. \\ \hline \multirow{2}{*}{Economic and Policy Implications} & [33], (2023) & Impact of weather patterns on economic and energy systems. \\  & [55], (2023) & Job creation assessment for battery storage systems. \\  & [93], (2024) & Methodology application to address economic concerns in hotels. \\ \hline \multirow{2}{*}{Future Scope for Specific Systems} & [93], (2022) & Updating route tables for better system exploitation. \\  & [94], (2024) & Development of prototypes for experimental investigations. \\ \hline \end{tabular}
\end{table} 
Table 2: Suggestions for future research (structured by the authors).