A novel three phase voltage mode quasi-Z-source inverter

作者：Gao Fengyang^*; Du Qiang; Qiao Yao; Huang Ke; Wu Baoning

来源：Acta Energiae Solaris Sinica, 2017, 38(11): 2989-2997.

• Analysis and simulation
• Inductor current ripples
• Small signal model
• State space averaging method
• Third harmonic
• Transient characteristic
• Voltage stress
• Z-source inverter

A novel quasi Z-source inverter was proposed without additional passive components to overcome the problem of high voltage stress and complex modeling shortcomings. The transient characteristics of the new topology are analyzed by means of the small signal model which is obtained by the state-space averaging method. Under the simple boost control condition, a comparative analysis is carried out for quasi Z-source, DLCC-cascaded type and the novel quasi Z-source inverter, at the same time, the third harmonic injection control strategy is introduced to improved Z-source inverter. Theoretical analysis and simulation results showed that the novel quasi Z-source inverter has partial device symmetry, higher boost factor, lower capacitor and switching stress, lower current inductor ripper and common ground with the dc source. The third harmonic injection control not only improves the utilization rate of DC voltage but also reduces the voltage stress and Z-source inductor current ripple.

• 出版日期2017