A Novel Control Strategy to Suppress DC Current Injection of Single-phase PV Inverter to the Grid

被引：0
|
作者：
He, Guofeng [1 ]
Chen, Min [1 ]
Su, Na [1 ]
Xie, Ren [1 ]
Xu, Dehong [1 ]
机构：
[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310003, Zhejiang, Peoples R China
来源：
2013 4TH IEEE INTERNATIONAL SYMPOSIUM ON POWER ELECTRONICS FOR DISTRIBUTED GENERATION SYSTEMS (PEDG) | 2013年
关键词：
DC current injection; PV inverter; DC offset voltage; DC suppression loop; Grid; TRANSFORMERLESS;
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：
PV inverters without the isolation transformer become more attractive due to higher efficiency and lower weight. However, it may exist DC offset current problem and is critical to power system. In this paper a novel control strategy to suppress DC current injection of PV inverter to the grid is investigated. It is based on idea of accurately sensing the DC offset voltage of PV inverter. Since DC component of the inverter output can be eliminated, DC injection to the grid can be effectively suppressed. Finally the control scheme is verified by the experiment.
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页数：8
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