Reactive power of wind farms significantly impacts the power grid.Current standards specify requirements for the dynamic reactive power response time and duration of wind farms

yet they do not address the reactive power dynamic response performance of wind turbines.To address this gap

this article attempts to propose indicators for quantitatively evaluating the dynamic response performance of wind turbines

including reactive power response time

capabi-lity

and support capability.The effectiveness of the proposed wind turbine reactive power support capability index is verified using PSD-BPA simulation and analysis of actual wind farm voltage and reactive power operation data.The index value positively correlates with the transient voltage stability limit of wind turbines.The smaller the voltage drop depth of the wind turbine

the longer the duration of reactive power output and the higher the index value

indicating a stronger reactive power support capability of the wind turbine.