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中文摘要：
利用大信号平均模型对称分量分析方法对三相逆变器产生三相输出电压不平衡的机理进行系统的分析,得到了直观而清晰的结论,为对三相逆变器进行不平衡矫正提供了理论基础;在此基础上,提出相应的矫正方法.该文在三相输出电压不平衡产生机理的理论分析基础上,提出一种简单可行的三相四桥臂逆变器控制方法,从而保证逆变器在带不平衡负载时仍能维持三相平衡的输出电压.文章最后给出仿真和实验结果,验证了理论分析和所提出的控制方法的正确性.
英文摘要：
An intuitional and clear conclusion about the unbalanced output voltages distortion mechanism is presented through systematic analysis of the traditional three-phase inverter by using symmetrical component method and large-signal averaged modeling method, which provided the theoretical foundation for the unbalanced correction of three-phase inverter. Then on the basis of the conclusion, correction methods are investigated accordingly. Finally, based on the presented unbalanced output voltages distortion mechanism of three-phase inverter, a simple and feasible control method for three-phase four-leg inverter is advanced, which cnsures that the inverter can maintain a set of three-phase output voltages under unbalanced loads. Simulation and experimental results further verify the validity of the proposed control method.
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