The article presents two methods aimed at maintaining the frequency of the power system. The first method involves calculation and implementation of virtual inertia control (VIC) provided by a Doubly-Fed Induction Generator (DFIG). This approach is based on analyzing variations in the frequency response of DFIG, enabling the optimization of system's reaction to frequency fluctuations and enhancing stability of the power system. The second method uses an energy storage system (ESS) to release energy, thereby supporting frequency stability during overload conditions. The results demonstrate that the DFIG, when supported by the additional VIC method and with the integration of ESS, or even with the combined approach supports frequency stability and improves the dynamic response of the overall energy system.