Analysis of influence of large-scale wind farm grid connection on system short-circuit current

In this paper, short-circuit current calculation and analysis are carried out on the whole network model based on PSASP software, most existing literature studies are carried out under the condition of a single equivalent modeling for wind farm, while this paper conducts simulation analysis on the actual wind farm, the model of the whole network is 220kV and above voltage grade network and 110kV and below voltage network with transmission function reserved, including the detailed parameters of transformers and lines of each voltage grade of wind farm. From the distance from the wind farm to the short circuit point, the installed capacity of the wind farm, and short circuit point voltage grade, the contribution value of large-scale wind farm access to short-circuit current, the influence rule of wind power grid connection on the short-circuit current of the bus in the near area is revealed in many aspects. It provides guidance and reference for power system planning and dispatching department.