Abstract: A power conversion device and a control method thereof are provided. The power conversion device includes a three-level inverter, positive and negative DC terminals, first and second capacitors, a balance circuit, a bidirectional DC-DC converter and a controller. The three-level inverter has two DC terminals coupled to the positive and negative DC terminals respectively. Two terminals of the first capacitor are coupled to the positive DC terminal and a capacitor midpoint respectively. Two terminals of the second capacitor are coupled to the capacitor midpoint and the negative DC terminal respectively. The balance circuit is electrically connected between the positive and negative DC terminals and has a neutral terminal electrically connected to the capacitor midpoint. The bidirectional DC-DC converter is electrically connected to the DC terminals.

Abstract: Provided is a method for adjusting objects during photographing. The method includes: displaying a to-be-photographed object in an object preview interface; adjusting a target sub-object in response to an adjustment instruction to the target sub-object of the to-be-photographed object; and displaying position indication information in the object preview interface, wherein the position indication information indicates a position of the adjusted target sub-object in the object preview interface.