针对不平衡负载三相逆变电源控制方法的研究  

Study on control method of three-phase inverter power supply with unbalance load

作　　者：孙进[1] 宋聚明[1] 卢家林[1] 苏彦民[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电能新技术》2003年第1期29-31,60,共4页Advanced Technology of Electrical Engineering and Energy

摘　　要：三相逆变电源一个最重要的性能是维持三相电压的对称输出。本文提出了一种新的针对不平衡负载三相逆变电源控制方法,其通过对逆变电源交流中性点的控制,使得主电路中三相电压可以独立控制。所提出的方案在1KW,400Hz的三相逆变电源实现,在不平衡负载下,逆变电源能够维持很好的对称输出电压。One of the important performance issues for threephase inverter power supply is to maintain symmetrical output voltages. This paper proposes a new control strategy of a threephase inverter power supply with the threephase unbalanced load applied. In this paper, an accessible AC neutral point is established. When the AC neutral point is controlled to half of the DClink voltage, the potential of AC neutral point N is equal to that of DClink midpoint O, thus each phase voltage can be controlled independently. The proposed control strategy has been implemented on a 400Hz, 1KW threephase inverter power supply, in contrast with the usual control strategy, the inverter can maintain symmetrical output voltages not only at balance load but also at unbalance load.

关 键 词：三相逆变电源 控制方法 不平衡负载 主电路结构 解耦控制 逆变器 

分 类 号：TM464[电气工程—电器]