The Z-source inverter solves the problem that the conventional inverter has no boosting capability, and the upper and lower arms cannot be directly connected. However, there are still problems of limited boosting, abnormal working conditions, and inability to achieve energy feedback. In this paper, an enhanced bidirectional Z-source inverter is proposed. The switch inductor unit replaces the inductance in the Z source network of the traditional Z-source inverter, and the original diode is replaced by the IGBT, thereby improving the boosting capability and solving the problem. The abnormal working state of the traditional Z-source inverter realizes the bidirectional flow of energy. An improved space voltage vector modulation strategy based on three-stage is proposed to reduce the switching loss of the device. The simulation of MATLAB/Simulink verifies the correctness of the above theory.
