The invention discloses an energy storage type intelligent transformer for a wind power generation system. The energy storage type intelligent transformer comprises a power frequency boosting transformer and three single-phase energy storage type voltage transformation units which correspond to three-phase lines of the power frequency boosting transformer respectively. Each single-phase energy storage type voltage transformation unit comprises a low-voltage-side single-phase full-bridge power frequency DC-AC converter, a low-voltage-side single-phase full-bridge high-frequency DC-AC converter, a two-way DC-DC converter, an energy storage device, a multi-winding high-frequency transformer, one or more high-voltage-side single-phase full-bridge high-frequency DC-AC converters and one or more high-voltage-side single-phase full-bridge power frequency DC-AC converters, wherein the high-voltage-side single-phase full-bridge high-frequency DC-AC converters correspond to the high-voltage-side single-phase full-bridge power frequency DC-AC converters in a one-to-one mode, and all the high-voltage-side single-phase full-bridge power frequency DC-AC converters are sequentially cascaded into a chain through two alternating current ports. The energy storage type intelligent transformer can smooth the power fluctuation of wind power and improve the low voltage ride-through capacity of the wind power.