Abstract：Based on the simplified equivalent model of the grid connected fixed-speed induction generator (FSIG)-based wind farm containing line parameters,the transient characteristics as well as the power characteristics of large capacity wind farms are analyzed in detail,and thus the relationship between the critical clearing time (CCT) and the reactive power compensation capacity of the FSIG-based wind farm is presented quantitatively.Moreover,the configuration method using the torque characteristics and the power flow of the wind farm to determine the capacity of the static synchronous compensator (STATCOM) for large capacity wind farms is firstly proposed.The proposed method can be used to calculate the minimum STATCOM capacity for the grid-connected FSIG-based wind farm satisfying the requirement for low voltage ride through (LVRT) in the guide rules.Furthermore,the proposed configuration method is verified by the simulation results.Finally,the correlative factors affecting LVRT characteristics are elaborated,the relationship between the capacity of the STATCOM and the electrical distance between the wind farm and the connected power grid is analyzed,and the impact of the STATCOM’s capacity on wind farm’s transient operation performance is assessed.
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2016, Vol. 31 
