A Method to Evaluate the Inertial Response of Frequency Controlled Converter-Interfaced Generation

The paper proposes a method to assess the equivalent inertial response provided by converter-interfaced generation equipped with fast frequency response capability and its impact on the minimum amount of rotational inertia required to guarantee power system's stability. The method is based on the solution of an optimization problem aimed at finding the minimum inertia required by the system to contain frequency and rate of change of frequency deviations within the limits required by system operators. The effectiveness of the proposed method is illustrated through the WSCC 9-bus test system.