作　　者： (雷厚中）; (李建春）;

机构地区： 北京航天控制仪器研究所

出　　处： 《导航与控制》 2015年第4期30-36,44,共8页

摘　　要： 三相四桥臂逆变器可以带不平衡负载甚至单相负载。针对三相四桥臂逆变器,提出了一种新的重复控制算法。该算法相对于传统恒压恒频(CVCF)控制算法具有设计简单,不需要dq变换,在提高电压稳态精度的同时,还降低了输出电压总谐波含量(THD)。系统分析了三相四桥臂逆变器电路模型,得到整个系统的传递函数,分析了系统的稳态误差和稳定性。最后通过仿真和试验验证了系统输出电压稳态精度高,谐波含量低,且能有效抑制由不平衡负载引起的输出电压不平衡。 Three-phase four-leg inverter can be used for unbalanced loads and single phase loads.This paper presents a new repetitive controller for three-phase four-leg inverter.Compared with the traditional CVCF control algorithm,this new control algorithm is easer to design,needs without dq transformation,increases the voltage accuracy in the steady state and decreases the output voltage THD.In this paper,the three-phase four-leg inverter is analyzed in detail,the whole system’s transfer function is derived,and the steady state tracking error and the system stability analysis are presented.The simulation and experiment verify the cheme can work well.High accurate steady output.low THD is gained,and the unbalanced output voltage due to unbalanced load is effectively mitigated.

关 键 词： 三相四桥臂逆变器 重复控制 不平衡负载