Online Identification of Inertia and Primary Frequency Control for Wind Farms with Virtual Inertia Control

This paper proposes a scheme for online identifying the inertia and primary frequency control of wind farms with virtual inertia control. The power generation deviation and frequency deviation are defined as the model’s input and output, respectively. With this time-domain input and output, as well as some knowledge of the system structure, the inertia and the primary frequency control can be identified. In order to validate the proposed scheme, both simulation data and field PMU data are applied as the measurement data. In both cases, the identification scheme achieves high accuracy and robustness.