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This paper presents the design, modeling, and performance evaluation of a standalone microgrid system using ETAP (Electrical Transient Analyzer Program) software.The proposed system consists of multiple diesel generators operating in parallel to supply an institutional load, ensuring reliable and continuous power delivery. The study addresses limitations of conventional centralized power systems such as voltage instability, transmission losses, and poor reliability in remote or isolated locations. The microgrid is analyzed using load flow, short circuit, and optimal power flow (OPF) studies. Load flow analysis evaluates voltage profiles, power distribution, and load sharing among generators, while short circuit analysis determines fault current levels to ensure proper protection and system safety. Furthermore, optimal power flow analysis enhances system performance by improving voltage regulation and minimizing deviations. The results indicate that the microgrid operates within acceptable voltage limits and maintains stable performance under both normal and fault conditions, with effective load sharing among generators. The study demonstrates that multi-diesel generator microgrids are technically feasible and suitable for standalone applications, providing a strong foundation for future integration of renewable energy sources and advanced control strategies.