An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions

Hesam Khazraj; Filipe Miguel Faria da Silva; Claus Leth Bak

doi:10.1109/EEEIC.2016.7555633

An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions

Hesam Khazraj, Filipe Miguel Faria da Silva, Claus Leth Bak

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

9 Citations (Scopus)

Abstract

Voltage Source Converters (VSCs) operating in very weak grids with low Short Circuit Ratio (SCR) are known to meet stability challenges. This article investigates instability of a grid connected current-controlled converter under weak grid conditions, which is often attributed to the dynamic interaction between the phase-locked loop (PLL) and system impedance networks. To accomplish this object, available approaches are overviewed, and their advantages and disadvantages are briefly explained. Then a simple yet effective technique based on the joint operation of virtual impedance technique and an amplitude estimation strategy is presented to tackle their shortcomings. The effectiveness of the proposed strategy is finally evaluated using the simulation results.

Original language	English
Title of host publication	Proceedings of 16th IEEE International Conference on Environment and Electrical Engineering (EEEIC), 2016
Number of pages	6
Publisher	IEEE Press
Publication date	Jun 2016
ISBN (Electronic)	978-1-5090-2320-2
DOIs	https://doi.org/10.1109/EEEIC.2016.7555633
Publication status	Published - Jun 2016
Event	16 IEEE International Conference on Environment and Electrical Engineering - Florence, Italy Duration: 7 Jun 2016 → 10 Jun 2016 http://eeeic.eu/

Conference

Conference	16 IEEE International Conference on Environment and Electrical Engineering
Country/Territory	Italy
City	Florence
Period	07/06/2016 → 10/06/2016
Internet address	http://eeeic.eu/

Keywords

Weak grids
Grid Impedance Estimation
Phase Locked Loop (PLL)
Power System Stability
Stability limits

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10.1109/EEEIC.2016.7555633

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Cite this

@inproceedings{56c4e83f017348a7b68969cc760a972e,

title = "An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions",

abstract = "Voltage Source Converters (VSCs) operating in very weak grids with low Short Circuit Ratio (SCR) are known to meet stability challenges. This article investigates instability of a grid connected current-controlled converter under weak grid conditions, which is often attributed to the dynamic interaction between the phase-locked loop (PLL) and system impedance networks. To accomplish this object, available approaches are overviewed, and their advantages and disadvantages are briefly explained. Then a simple yet effective technique based on the joint operation of virtual impedance technique and an amplitude estimation strategy is presented to tackle their shortcomings. The effectiveness of the proposed strategy is finally evaluated using the simulation results.",

keywords = "Weak grids, Grid Impedance Estimation, Phase Locked Loop (PLL), Power System Stability, Stability limits",

author = "Hesam Khazraj and Silva, {Filipe Miguel Faria da} and Bak, {Claus Leth}",

year = "2016",

month = jun,

doi = "10.1109/EEEIC.2016.7555633",

language = "English",

booktitle = "Proceedings of 16th IEEE International Conference on Environment and Electrical Engineering (EEEIC), 2016",

publisher = "IEEE Press",

note = "16 IEEE International Conference on Environment and Electrical Engineering ; Conference date: 07-06-2016 Through 10-06-2016",

url = "http://eeeic.eu/",

}

Khazraj, H, Silva, FMFD & Bak, CL 2016, An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions. in Proceedings of 16th IEEE International Conference on Environment and Electrical Engineering (EEEIC), 2016. IEEE Press, 16 IEEE International Conference on Environment and Electrical Engineering , Florence, Italy, 07/06/2016. https://doi.org/10.1109/EEEIC.2016.7555633

An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions. / Khazraj, Hesam; Silva, Filipe Miguel Faria da ; Bak, Claus Leth.
Proceedings of 16th IEEE International Conference on Environment and Electrical Engineering (EEEIC), 2016. IEEE Press, 2016.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions

AU - Khazraj, Hesam

AU - Silva, Filipe Miguel Faria da

AU - Bak, Claus Leth

PY - 2016/6

Y1 - 2016/6

N2 - Voltage Source Converters (VSCs) operating in very weak grids with low Short Circuit Ratio (SCR) are known to meet stability challenges. This article investigates instability of a grid connected current-controlled converter under weak grid conditions, which is often attributed to the dynamic interaction between the phase-locked loop (PLL) and system impedance networks. To accomplish this object, available approaches are overviewed, and their advantages and disadvantages are briefly explained. Then a simple yet effective technique based on the joint operation of virtual impedance technique and an amplitude estimation strategy is presented to tackle their shortcomings. The effectiveness of the proposed strategy is finally evaluated using the simulation results.

AB - Voltage Source Converters (VSCs) operating in very weak grids with low Short Circuit Ratio (SCR) are known to meet stability challenges. This article investigates instability of a grid connected current-controlled converter under weak grid conditions, which is often attributed to the dynamic interaction between the phase-locked loop (PLL) and system impedance networks. To accomplish this object, available approaches are overviewed, and their advantages and disadvantages are briefly explained. Then a simple yet effective technique based on the joint operation of virtual impedance technique and an amplitude estimation strategy is presented to tackle their shortcomings. The effectiveness of the proposed strategy is finally evaluated using the simulation results.

KW - Weak grids

KW - Grid Impedance Estimation

KW - Phase Locked Loop (PLL)

KW - Power System Stability

KW - Stability limits

U2 - 10.1109/EEEIC.2016.7555633

DO - 10.1109/EEEIC.2016.7555633

M3 - Article in proceeding

BT - Proceedings of 16th IEEE International Conference on Environment and Electrical Engineering (EEEIC), 2016

PB - IEEE Press

T2 - 16 IEEE International Conference on Environment and Electrical Engineering

Y2 - 7 June 2016 through 10 June 2016

ER -

An Improved Current Controller to ensure the robust performance of grid-connected converters under weak grid conditions

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Keywords

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