Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLL

Xiaoqiang Guo; Wenzhao Liu; Xue Zhang; Xiaofeng Sun; Zhigang Lu; Josep M. Guerrero

doi:10.1109/TPEL.2014.2344098

Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLL

Xiaoqiang Guo, Wenzhao Liu, Xue Zhang, Xiaofeng Sun, Zhigang Lu, Josep M. Guerrero

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Abstract

Power oscillation and current quality are the important performance targets for the grid-connected inverter under unbalanced grid faults. Firstly, the inherent reason for the current harmonic and power oscillation of the inverter is discussed with a quantitative analysis. Secondly, a new control strategy is proposed to achieve the coordinate control of power and current quality without the need for a phase-locked loop or voltage/current positive/negative sequence extraction calculation. Finally, the experimental tests are conducted under unbalanced grid faults, and the results verify the effectiveness of the propose method.

Original language	English
Journal	I E E E Transactions on Power Electronics
Volume	30
Issue number	4
Pages (from-to)	1773-1778
Number of pages	6
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2014.2344098
Publication status	Published - Apr 2015

Keywords

Grid-connected inverter
Grid fault
Current quality
Power oscillation

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10.1109/TPEL.2014.2344098

Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLLSubmitted manuscript, 2.29 MB

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6868262&isnumber=6945409

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@article{8ca81fc7b451415580cd7ad1a7eb24fe,

title = "Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLL",

abstract = "Power oscillation and current quality are the important performance targets for the grid-connected inverter under unbalanced grid faults. Firstly, the inherent reason for the current harmonic and power oscillation of the inverter is discussed with a quantitative analysis. Secondly, a new control strategy is proposed to achieve the coordinate control of power and current quality without the need for a phase-locked loop or voltage/current positive/negative sequence extraction calculation. Finally, the experimental tests are conducted under unbalanced grid faults, and the results verify the effectiveness of the propose method.",

keywords = "Grid-connected inverter, Grid fault, Current quality, Power oscillation",

author = "Xiaoqiang Guo and Wenzhao Liu and Xue Zhang and Xiaofeng Sun and Zhigang Lu and Guerrero, {Josep M.}",

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language = "English",

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T1 - Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLL

AU - Guo, Xiaoqiang

AU - Liu, Wenzhao

AU - Zhang, Xue

AU - Sun, Xiaofeng

AU - Lu, Zhigang

AU - Guerrero, Josep M.

PY - 2015/4

Y1 - 2015/4

N2 - Power oscillation and current quality are the important performance targets for the grid-connected inverter under unbalanced grid faults. Firstly, the inherent reason for the current harmonic and power oscillation of the inverter is discussed with a quantitative analysis. Secondly, a new control strategy is proposed to achieve the coordinate control of power and current quality without the need for a phase-locked loop or voltage/current positive/negative sequence extraction calculation. Finally, the experimental tests are conducted under unbalanced grid faults, and the results verify the effectiveness of the propose method.

AB - Power oscillation and current quality are the important performance targets for the grid-connected inverter under unbalanced grid faults. Firstly, the inherent reason for the current harmonic and power oscillation of the inverter is discussed with a quantitative analysis. Secondly, a new control strategy is proposed to achieve the coordinate control of power and current quality without the need for a phase-locked loop or voltage/current positive/negative sequence extraction calculation. Finally, the experimental tests are conducted under unbalanced grid faults, and the results verify the effectiveness of the propose method.

KW - Grid-connected inverter

KW - Grid fault

KW - Current quality

KW - Power oscillation

U2 - 10.1109/TPEL.2014.2344098

DO - 10.1109/TPEL.2014.2344098

M3 - Journal article

SN - 0885-8993

VL - 30

SP - 1773

EP - 1778

JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

IS - 4

ER -

Flexible Control Strategy for Grid-Connected Inverter under Unbalanced Grid Faults without PLL

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