In an isolated microgrid, in the absence of a rotating synchronous machine, a virtual synchronous generator behaves as a rotating synchronous machine within a converter-based system and mitigates instability issues. This paper presents an enhancement to the control techniques of a virtual synchronous generator for inverter-based resources, aiming to address system instability concerns. The improvement involves a change within the outer active power loop of the virtual synchronous generator by incorporating extra inertia support through regulating the power angle responses while disturbances occur in the microgrid. To report and investigate the impact of the proposed modification on an isolated microgrid, a working model is created using the MATLAB/Simulink platform. The model outcomes uncover the effectiveness of the suggested changes in enhancing the management of voltage and frequency regulation in microgrids.