基于前馈补偿控制的四桥臂逆变器研究  

Research on the Three-phase Four-leg Inverter Based on Feed-forward Compensation Control Strategy

作　　者：孟繁荣[1] 曲林伟[1] 

机构地区：[1]哈尔滨工程大学,哈尔滨150000

出　　处：《电测与仪表》2013年第1期66-70,88,共6页Electrical Measurement & Instrumentation

摘　　要：针对三相四桥臂逆变器在不平衡负载较大时所产生的三相输出电压不对称问题,本文采用前馈补偿加双闭环控制的方法来解决这一难点。根据四桥臂逆变器平均电流模型,在理论上得出了前馈补偿控制策略。在该控制方案下的Matlab仿真波形符合所要求的三相对称输出电压,因此体现了此方案的正确性。实验结果表明,当不平衡负载较大时,加入前馈补偿控制能够使逆变器输出对称的三相电压,从而验证了该控制方案的可行性。The output voltage of three-phase four-leg inverter is unbalanced when the three-phase load is unbalanced, which will have a negative effect on the power supply of other load. The paper researched on the solution of this prob- lem. Based on analysis of the average current model of three-phase four-leg inverter, the feed-forward control strategy is proposed. The simulation is conducted in MATLAB and the experiment platform is also established for the verifica- tion of feed-forward control strategy. The experiment results indicated that when the load is seriously unbalanced, the three-phase four-leg inverter can also output balanced voltage, which has proved the availability and effectiveness of the proposed feed-forward control strateg].

关 键 词：三相四桥臂逆变器 前馈补偿 不平衡负载 双闭环控制 

分 类 号：TM933[电气工程—电力电子与电力传动]