Analysis of control strategy for grid-connected inverter under different constraints based on asymmetric grid

被引：0

作者：

Jiang, Weidong ^{[1
]}

Wu, Zhiqing ^{[1
]}

Hu, Yang ^{[1
]}

Tao, Ziran ^{[1
]}

机构：

[1] School of Electrical and Automation Engineering, Hefei University of Technology, Hefei

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2015年 / 39卷 / 19期

基金：

中国国家自然科学基金;

关键词：

Asymmetric grid; Control strategy; Grid-connected inverter; Positive and negative sequence separation; Repetitive control;

D O I：

10.7500/AEPS20140307009

中图分类号：

学科分类号：

摘要：

When a three-phase grid is unbalanced, the grid-connected inverter based on the traditional double-loop control strategy will generate even-numbered and odd-numbered harmonics on the DC side and AC side, respectively, which will seriously affect the performance of the grid-connected inverter system. For this reason, the control strategy of grid connection is proposed to realize under the positive-negative sequence rotational coordinate system. With the control strategy, different constraint conditions are obtained from different control objectives (inner current reference) and the corresponding control method is designed. To effectively and rapidly separate positive and negative sequences, an instantaneous positive-negative sequence separating method is presented. The forgetting integration algorithm is adopted for filtering. Experimental results under various control objectives are compared to show the effectiveness and simplicity of the algorithm. ©2015 Automation of Electric Power Systems Press

引用

页码：113 / 120and136

共 17 条

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