Z-source inverter control method and device, air conditioner and storage medium

The invention discloses a control method and device for a Z-source inverter, an air conditioner and a storage medium, and the method comprises the steps: obtaining a torque compensation current which has torque compensation control during the operation of a compressor, and carrying out the calculation according to the torque compensation current, thereby obtaining a first straight-through duty ratio; according to a capacitance sampling voltage acquired by a capacitor in the X-type impedance network and an inductance sampling current acquired by an inductor in the X-type impedance network, calculating to obtain a second straight-through duty ratio, and according to an A-phase current and a B-phase current acquired from a three-phase power supply output by the IPM module, generating an initial PWM modulation signal; and adjusting the initial PWM modulation signal according to the first shoot-through duty ratio and the second shoot-through duty ratio to obtain a target PWM modulation signal, thereby reducing the fluctuation of the capacitor voltage when the compressor has torque compensation control, improving the stability of the output voltage, prolonging the service life of the Z-source inverter impedance network, and further reducing the overall cost of electric control.