An increase in inverter-based resources (IBRs) can lower the inertia of a power system. which may adversely affect the power system by causing changes such as a frequency nadir reduction or an increased initial rate of change of frequency (RoCoF). To prevent this. an ancillary service called fast frequency response (FFR) helps the inertia response by using IBRs. https://danddcollectiblers.shop/product-category/wall-art/