The invention relates to a method for selecting an energy storage configuration site of a wind power connection system. The method comprises the following steps of S1, obtaining an equivalent portionof a wind power grid-connected node; S2, obtaining the equivalent double-node system of a local system by multi-port Thevenin's equivalence, and calculating the instability index of each voltage nodeof the wind power connection system; S3, calculating the sensitivity index of each configurable energy storage node to the voltage stability key site; S4, normalizing the obtained sensitivity indexes;and S5, presetting a threshold value K, and eliminating the nodes whose sensitivity indexes are less than K, and obtaining a set of wind power connection system energy storage configuration sites that can improve voltage stability. According to the network architecture, the real-time system information and the actually measured wind farm output situation, the method selects a storage energy configuration site favorable for the voltage stability of the wind power connection system in consideration of voltage stability.