Abstract: A method and an apparatus for detecting a short circuit of an inverter, and an inverter are provided. A voltage of a common bus is increased when a plurality of boost circuits in the inverter are all in a non-working state, and after circuit parameters of input sides of all the plurality of boost circuits are detected, a boost circuit in which a diode is short-circuited in the plurality of boost circuits is further determined based on the circuit parameters of the input sides of the boost circuits. According to the method and the apparatus for detecting a short circuit of an inverter, and the inverter, circuit complexity of the inverter can be reduced, and circuit complexity of a photovoltaic power generation system including the inverter is reduced.

Abstract: A common mode current controller of an inverter includes switches and an impedance correction circuit. One end of the impedance correction circuit is grounded, and the other end is connected to one end of each of the switches. The other end of each of the switches is connected to one of a positive terminal and a negative terminal of a direct current busbar capacitor. When a midpoint-to-ground voltage of the direct current busbar capacitor exceeds a threshold range, the switches are closed to adjust impedance matching between a positive terminal-to-ground equivalent impedance of the direct current busbar capacitor and a negative terminal-to-ground equivalent impedance of the direct current busbar capacitor.

Abstract: A method and an apparatus for detecting a short circuit of an inverter, and an inverter are provided. A voltage of a common bus is increased when a plurality of boost circuits in the inverter are all in a non-working state, and after circuit parameters of input sides of all the plurality of boost circuits are detected, a boost circuit in which a diode is short-circuited in the plurality of boost circuits is further determined based on the circuit parameters of the input sides of the boost circuits. According to the method and the apparatus for detecting a short circuit of an inverter, and the inverter, circuit complexity of the inverter can be reduced, and circuit complexity of a photovoltaic power generation system including the inverter is reduced.