Grid-connected control strategy of photovoltaic inverter based on double sequence feed-forward decoupling

被引：0
|
作者：
Yang H. [1 ]
Song G. [1 ]
Teng F. [1 ]
Yang Z. [1 ]
Chen Y. [1 ]
机构：
[1] School of Electrical Engineering, Guangxi University, Nanning
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 01期
关键词：
Coordinates transformation; Dead zone; Feed-forward decoupling; PV grid-connected inverter; Repetitive control;
D O I：
10.19912/j.0254-0096.tynxb.2019-1065
中图分类号：
学科分类号：
摘要：
The current quality in PV grid-connected inverters is deteriorated due to interference of grid voltage and couplings between the phases in dq frame, especially under the unbalanced grid conditions. Therefore, a positive and negative sequence feed-forward technique was proposed for a alternative solution. The double synchronous reference frame is utilized to eliminate the negative-sequence component and extract the positive-sequence component for decoupling control. In order to avoid dead-time effect, compound control of repetitive controller with PI controller is used as a current harmonic compensator. The validity of the proposed control scheme is demonstrated through simulations. Experimental results of decreasing the harmonic content of grid-connected current also shows the effectiveness. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：77 / 84
页数：7
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