DC Capacitance Reduction in Three-Phase Photovoltaic Inverters by using Virtual Impedance Emulation

被引:0
|
作者
Urtasun, Andoni [1 ]
Sanchis, Pablo [1 ]
Marroyo, Luis [1 ]
机构
[1] Publ Univ Navarre UPNA, Inst Smart Cities, Dept Elect & Elect Engn, Pamplona, Spain
关键词
Converter control; Frequency-Domain Analysis; Photovoltaic; Renewable energy systems;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
DC voltage regulation in grid-connected three-phase PV inverters is a fundamental requirement. In order to reduce the influence of the PV non-linear behavior and ensure stability in the whole operating range, the input capacitance in high-power inverters is currently oversized, thus increasing the converter cost. This paper proposes a control method which emulates a virtual impedance in parallel with the PV generator, making it possible to reduce the capacitance by a factor of 5. Simulation results confirm that the proposed control is stable and fast enough in the whole operating range with such a small capacitor.
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页数:9
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