摘要
传统的三相四线逆变电源采用的是三相三桥臂结构,第4根线构成中点形成变压器(NFT)。提出了一种新型三相四桥臂逆变电源,它的第4个桥臂用来构成中点,从而减小了体积和质量,降低了成本。针对此逆变电源,提出了一种3D-SVPWM的控制策略,并引入前馈补偿方法加以改进。仿真结果表明:此控制方案具有可行性。同时为提高母线直流电压利用率提供了可靠的理论基础。
The traditional three-phase four-wire inverter uses the structure with three-phase three-leg, and the fourth wire constitutes the neutral formed transformer. A novel three-phase four-leg inverter is presented in this paper by adding the fourth leg to form neutral point instead of NFT to reduce the vol- ume and weight and cost. This paper suggests a 3D-SVPWM control strategy and adds feed-forward compensation method for further improvement. The simulation resuh shows that this control strategy is feasible to provide the reliable theoretical basis for the new inverter to deal with unbalanced load and improve the utilization rate of DC bus voltage.
出处
《重庆理工大学学报(自然科学)》
CAS
2013年第4期72-76,共5页
Journal of Chongqing University of Technology:Natural Science
基金
重庆理工大学研究生创新基金资助项目(YCX2011102)
关键词
三相四桥臂
逆变电源
控制策略
three-phase four-leg
inverter
control strategy