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
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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
Blaabjerg Frede
中科院分区:
工程技术4区
文献类型:
--
作者:
Liu Zifa;Wu Huiyun;Liu Yuan;Ji Junhao;Wu Weimin;Blaabjerg Frede

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最近提出的奥尔堡逆变器,由于较少的导通和开关功率损耗,具有较高的效率在很宽的范围内的输入直流电压的单相DC/AC功率转换。从理论上讲,如果采用LLCL滤波器代替LCL滤波器用于电压源逆变器,则传导功率损耗可以进一步减小,这主要是由于减小了电感。Aalborg逆变器工作在升压模式时,具有电流型逆变器的特性 ' 状态LLCL滤波器是否能满足该类型逆变器的控制要求,还有待进一步探讨。在这项研究中,小信号分析的修改LLCL - 基于滤波器的奥尔堡逆变器。通过建模,可以证明,与LCL滤波器相比,改进的LLCL滤波器 - 滤波器不会给奥尔堡逆变器带来额外的控制挑战,因此可以安全地节省功率回路中的更多电感,以及更小的滤波器尺寸。一个220 V/50 Hz,2000 W的原型被用来证明理论分析。
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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