Bi-directional AC-AC Z-source inverter with active rectifier and feedforward control
Bi-directional AC-AC Z-source inverter with active rectifier and feedforward control
复制标题
具有有源整流器和前馈控制的双向 AC-AC Z 源逆变器
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Piepenbreier
中科院分区：
文献类型：
--
作者：
M. von Zimmermann;Sebastian Labusch;B. Piepenbreier
Z源逆变器由电感和电容组成，作为直流环节组件，与传统逆变器相比，提供了独特的升压能力。这种简单的结构不需要额外的开关元件，只需要很小的升压扼流圈。由于直流环节中电感和电容的振荡布置，电压和电流表现出特有的动态行为，特别是在使用交流电源的Z源逆变器时。其结果是由于不想要的穿通状态而导致输出电压的失真和自升压，以及由于市电电压整流而引起的DC链路电压振荡。提出了一种结合有源前端拓扑和阻尼器的拓扑结构，以防止任何不需要的穿透状态。此外，Z源逆变器能够在交流电源的情况下再生运行。基于这种无源元件最小化的新结构，给出了状态空间的描述。在此基础上，设计了前馈控制，以避免电网电压整流引起的负载电流谐波。实验结果验证了该方法的适用性。
Z-Source inverters, consisting of both inductors and capacitors as DC link components, provide unique boost capability in contrast to conventional inverters. The simple structure needs no additional switching elements and only small step-up chokes. Due to the oscillatory arrangement of both inductors and capacitors in the DC link, voltages and currents exhibit characteristical dynamic behavior especially when using the Z-source inverter with an AC supply. The consequences are distortion of the output voltage and self-boosting due to unwanted shoot-through states and oscillating DC link voltage due to mains voltage rectifying. An active front end topology in combination with a damped filter is proposed to prevent any unwanted shoot-through states. Besides, regenerating operation of the Z-source inverter with AC supply is enabled. Resting on this new structure with minimized passive components, a state space description is given. Subsequently, a feedforward control is designed to avoid load current harmonics caused by mains voltage rectifying. Experimental results verify the suitability.