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Performance analysis of parallel system using LCL filter inverter unit
Author(s): 
Pages: 90-98
Year: Issue:  2
Journal: Electric Machines and Control

Keyword:  inverterparallel operationLCL filtercirculating current in high frequencyoutput impedance;
Abstract: 由于各并联单元之间的参数差异,逆变器并联系统存在环流,其中的高频环流由于其频率超出系统的控制带宽,难以通过控制的方式进行抑制.本文分析了高频环流存在的原因,提出将并联逆变单元的LC滤波器改变为LCL滤波器.比较了LC滤波器和LCL滤波器的阻抗特性,分析了采用LC滤波器和LCL滤波器的逆变器的闭环输出特性,指出经过适当的参数设计可以使得这二种逆变器的等效输出阻抗在低频段相近而在高频段呈现很大差异.并...
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