METHOD AND APPARATUS FOR SUPPRESSION A CROSS CURRENT IN INVERTER PARALLEL SYSTEM

Embodiments of this application disclose a method and apparatus for suppressing a cross current in an inverter parallel system, and relate to the field of power supply, to suppress a cross current in an inverter parallel system and improve reliability of inverter components. A specific solution includes: obtaining a common-mode current and a common-mode injection voltage of each inverter in an inverter parallel system; determining a virtual damping voltage of each inverter based on the common-mode current of each inverter and a preset common-mode damping factor, where if a direction in which a current flows out of the inverter is a positive direction, the preset common-mode damping factor is a negative value, or if a direction in which a current flows into the inverter is a positive direction, the preset common-mode damping factor is a positive value; superimposing the virtual damping voltage on the common-mode injection voltage of each inverter, to obtain a target common-mode voltage of each inverter; and controlling operation of each inverter based on the target common-mode voltage of each inverter and a differential mode voltage of each inverter.