Power electronic transformer and control method thereof

The invention discloses a power electronic transformer and a control method thereof, and the transformer comprises a transformer main body which is used for converting an input power supply so as to supply power to a charging pile; and the control device is used for acquiring reservation information and use information of the charging pile, respectively acquiring reservation time and final use time from the reservation information and the use information, determining a time difference between the reservation time and the final use time, and controlling the working state of the transformer main body according to the time difference. The situation that the charging pile is already used or is about to be used is determined by analyzing the reservation information and the use information, when the transformer body is already or is about to be in the no-load state for a long time, the transformer body can stop working, and when the transformer body needs to continue working in a short time, the transformer body is