Grid connection control of an improved Z-source inverter

被引：0

作者：

Lin, Hongjian ^{[1
]}

Su, Hongsheng ^{[1
]}

机构：

[1] School of Automation & Electrical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, Gansu Province

来源：

Dianwang Jishu/Power System Technology | 2015年 / 39卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Coupled inductor; Gridconnection control; Shoot-through vector; Z-source inverter;

D O I：

10.13335/j.1000-3673.pst.2015.12.022

中图分类号：

O144 [集合论]; O157 [组合数学（组合学）];

学科分类号：

070104 ;

摘要：

To overcome shortcomings of traditional Z-source inverter, an improved z-source inverter topology is proposed. For this topology, a controlled device IGBT is introduced to realize separation between shoot-through zero vector and traditional zero vector, and then a coupled inductor is used to replace one of inductors connected to positive pole of power supply. Its position relative to three-phase inverter bridgeis changed. Compared to traditional z-source inverter, it obtains higher boost factor and lower capacitor voltage stress for steady state and higher quality of its AC output voltage when working in voltage mode. In addition, no inrush current exists at startup. The same efficiencies are maintained for its working in current mode. Finally, mathematical system model is established in two-phase rotating coordinate system. Voltage loop and two current loops are used to connect it to grid with high power factor. Results of calculation examples verify effectiveness of proposed control strategy. © 2015, Power System Technology Press. All right reserved.

引用

页码：3477 / 3484

页数：7

共 12 条

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