一种基于耦合电感的逆变器并联系统环流抑制方法  

Circulating-Current Restraining Method Based on Coupled Inductors in Parallel Inverter System

作　　者：陈良亮[1] 肖岚[1] 胡文斌[1] 严仰光[1] 

机构地区：[1]南京航空航天大学航空电源航空科技重点实验室,南京210016

出　　处：《南京航空航天大学学报》2004年第2期205-209,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金 (5 0 3 3 70 3 0 )资助项目 ;航空科学基金 (0 1 F5 2 0 3 2 )资助项目

摘　　要：逆变器并联系统各模块输出电压的幅值和相位等参数不一致会在各模块间产生较大的环流。在逆变器输出端串联电感能够较好地抑制并联逆变器模块间环流 ,其缺点是降低了并联系统的稳态电压精度。本文提出了耦合电感法这一新的环流抑制方法 ,研究了逆变器并联系统单模块后接耦合电感和非耦合电感对系统输出电压和环流的影响。理论分析和实验结果证明 ,对于由 n个模块组成的逆变器并联系统 ,使用耦合电感抑制环流可以使环流减小为用普通电感抑制环流时的 (n-1 ) / n,而且耦合电感不影响逆变器并联系统的稳态电压精度。The difference of amplitude and phase between each module′s output voltage can cause large circulating-current among modules in parallel inverter system. Individual inductor connected between the inverter′s output terminal and the load can restrain the circulating-current well with the disadvantage of reducing the steady-state voltage accuracy of parallel system. A new circulating-current restraining method based on coupled inductors is proposed to resolve this problem. The impact of individual inductor and coupled inductors on output voltage and circulating-current in parallel inverter system is also well researched. Theoretical analyses and experimental results prove that for a parallel inverter system with n modules and coupled inductors, the circulating-current between each module is reduced to (n-1)/n of the circulating-current in individual inductor-based parallel system. Coupled inductors have no impact on the steady-state voltage accuracy in parallel inverter system.

关 键 词：耦合电感 逆变器 并联控制 环流抑制 电源变换系统 

分 类 号：TM464[电气工程—电器]