Photovoltaic Inverter and Control Method Thereof

A photovoltaic inverter and a control method thereof are provided. The photovoltaic inverter includes: a three-phase bridge arm, including an A-phase bridge arm, a B-phase bridge arm, and a C-phase bridge arm, where a midpoint of the A-phase bridge arm is electrically connected to an A-phase line, a midpoint of the B-phase bridge arm is electrically connected to a B-phase line, a midpoint of the C-phase bridge arm is electrically connected to a C-phase line, and a midpoint of any one of the A-phase bridge arm, the B-phase bridge arm, and the C-phase bridge arm is also electrically connected to a neutral wire through a freewheeling branch; and a switching circuit electrically connected between the neutral wire and a user side.