Study on the Definition and Performance of Fast Frequency Response from Inverter-Based Resources

摘要

With increasing inverter-based resources taking place of the traditional synchronous generators, system inertia and primary frequency regulation capability are declining. The fast frequency response (FFR) from inverter-based resources proves to be an important mitigation option in maintaining grid security during low inertia and insufficient primary frequency capacity conditions. However, the inconsistent understanding of FFR is still confusing and unsettled. There have been practical needs for clear definition and performance requirements of FFR from inverter-based resources for further study and application. Aiming at the above problems, the system needs for FFR are analyzed in depth firstly. Then through the review of the existing usage of FFR, the recommended definition is given and the impact mechanism on frequency of FFR from inverter-based resources is studied. Finally, the performance requirements of FFR are clarified and the application effects are further verified.