Modelling of the modified-LLCL-filter-based single-phase grid-tied Aalborg inverter
Modelling of the modified-LLCL-filter-based single-phase grid-tied Aalborg inverter
复制标题
基于改进型 LLCL 滤波器的单相并网 Aalborg 逆变器的建模
DOI:
10.1049/iet-pel.2016.0044
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发表时间:
2017-02
影响因子:
2
通讯作者:
Blaabjerg Frede
中科院分区:
文献类型:
--
作者:
Liu Zifa;Wu Huiyun;Liu Yuan;Ji Junhao;Wu Weimin;Blaabjerg Frede
Owing to less conduction and switching power losses, the recently proposed Aalborg inverter has high efficiency within a wide range of input DC voltage for single-phase DC/AC power conversion. In theory, the conduction power losses can be further decreased, if an LLCL-filter is adopted instead of an LCL-filter for a voltage source inverter, mainly due to the reduced inductance. The Aalborg inverter shows the characteristic of a current source inverter, when working in the `boost
'
state. Whether the LLCL-filter can meet the control requirement of this type inverter needs to be further explored. In this study, the small signal analysis for the modified-LLCL
-
filter-based Aalborg inverter is addressed. Through the modelling, it can be proven that compared with the LCL-filter, the modified-LLCL
-
filter causes no extra control challenge for the Aalborg inverter, and therefore more inductance in the power loop can be safely saved as well as a complete smaller filter size. A 220 V/50 Hz, 2000 W prototype is used to demonstrate the theoretical analysis.
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