开关型电感准Z源逆变器

Switched-inductor Quasi-Z-source Inverter

提出了一种用开关型电感阻抗网络来连接电源和逆变桥主电路的新型准Z源逆变器拓扑,称为开关型电感准Z源逆变器。与传统准Z源逆变器相比,开关型电感准Z源逆变器可以提高电压增益,具有明显的升压优势,而且对于给定的电压增益,也可以采用更大的调制度,从而保证良好的输出电能质量。并将简单升压控制策略和3次谐波注入调制策略分别应用于开关型电感准Z源逆变器进行仿真,仿真结果验证了新型逆变器的优越性和合理性,而且验证了3次谐波注入调制策略的优点。

A new quasi-Z-source inverter called switched-inductor quasi-Z-source inverter was presented which employs a switched-inductor impedance network to couple power source and the invert main circuit. Compared with the traditional quasi-Z-source inverter, the switched-inductor quasi-Z-source inverter increases the voltage conversion rations, has an obvious voltage boost ability, and for a given voltage conversion ration, a higher modulation index can be used to ensure a good output power quality. Theoretical analysis, the experi- mental and simulative results based on the simple boost control strategy and the third harmonic injection con- trol strategy verify the superiority and rationality of the new quasi-Z-source inverter and demonstrate the fea- tures of the third harmonic injection control strategy.