两级式逆变器输入电流低频纹波分析及抑制  

Low Frequency Input Current Ripple Analysis and Reduction in Two-stage Inverter

作　　者：赵国庆[1] 邓翔[1] 龚春英[1] 

机构地区：[1]南京航空航天大学江苏省新能源发电与电能变换重点实验室,江苏南京210016

出　　处：《电力电子技术》2013年第3期87-89,共3页Power Electronics

摘　　要：针对两级式单相逆变器在DC/DC前级、DC/AC后级两级联调时出现低压直流源(蓄电池等)输入电流低频纹波脉动较大的问题,进行了相关分析和研究,并提出了抑制方法。建立了前级DC/DC变换器的低频纹波电流传输模型,分析了输入电流低频纹波脉动来源和传输路径;提出了从控制角度出发,通过添加谐振控制器的,在控制环路中增加对此脉动频率的衰减,达到抑制输入电流低频纹波脉动的效果;并进行了控制环路设计,确保其满足稳定性要求。设计了一台原理样机,通过测试结果验证了该方法的正确性和实用性。The input current contains low frequency ripple when the two stages of the single DC/AC inverter work together. This paper analyses this problem.The ripple current propagation path is analyzed through the low frequency ripple current propagation model.The resonant controller is introduced in the traditional control strategy.By increasing the reduction of the ripple frequency,it is very useful to reduce the input current ripple.The control loops are designed to meet the system stability.The principle prototype is designed and the effectiveness of it is verified by the experimental results.

关 键 词：逆变器 低频纹波抑制 谐振控制器 交流信号模型 

分 类 号：TM464[电气工程—电器]