The new and precise control base on Z-source inverter
This article in-depth analyzes the control character of the Z-source inverter in photovoltaic power generation system.According to these problems of the dynamic performance of the Z-source inverter output and boosting controlling strategy lead to double switched frequency etc.A new improved boosting modulation strategy is presented.Based on SVPWM,changing turning on or off time of the same bridge switches to insert 6 shoot-through states in the single-cycle of traditional zero vector.Compared with the conventional boosting modulation strategy,the modulation is not only to stabilize the output performance of Z source inverter in a certain extent,and can effectively reduce the switching frequency.In addition,According to inaccurate problem of inserting the shoot-through time for traditional modulation strategy,this article presents the strategy to control accurately the shoot-through time through the slope of the modulation signal,to make Z -source inverter more controllable.These advantages of improved precision boosting modulation strategy are verified by simulation and experiment.
Z-source inverter Modulation Strategy Traditional zero vector Shoot-through states Switching frequency
Cunlu Dang Hu Liu Xiaoying Zhang
Lanzhou University of Technology, China, 730050;Key Laboratory of Gansu Advanced Control for Industr Lanzhou University of Technology, China, 730050
国际会议
the 25th Chinese Control and Decision Conference(第25届中国控制与决策会议)
贵阳
英文
5183-5188
2013-05-01（万方平台首次上网日期，不代表论文的发表时间）