Current error based compensations for VSC current control in weak grid for wind farm applications

Kamyab Givaki; Dong Chen; Lie Xu

doi:10.1109/TSTE.2018.2820386

Current error based compensations for VSC current control in weak grid for wind farm applications

Kamyab Givaki, Dong Chen, Lie Xu

Electrical Power Engineering

Research output: Contribution to journal › Article

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Abstract

A novel current control strategy is proposed for voltage source converter connecting to weak grid using conventional current vector control with additional current error based voltage angle and magnitude compensations. For connecting to very weak AC network, conventional vector control is proved to be unstable, whereas the proposed current error based compensations can significantly improve system stability. In this way, the proposed control can still benefit from the presence of current closed-loop control without the need for control switching during large AC voltage variations. Comprehensive frequency domain model is established to analyze stability performance. Comprehensive time domain simulations are further carried out to validate its effectiveness and robustness by demonstrating its current control performance during a three-phase fault, multiple-converter situation and various grid strength conditions.

Original language	English
Pages (from-to)	26-35
Number of pages	10
Journal	IEEE Transactions on Sustainable Energy
Volume	10
Issue number	1
Early online date	28 Mar 2018
DOIs	https://doi.org/10.1109/TSTE.2018.2820386
Publication status	Published - Jan 2019

Keywords

voltage source converter
weak grid
current control
stability
fault current

Documents and Links

10.1109/TSTE.2018.2820386

Givaki, K. et al (2018) Current error based compensations for VSC current control in weak grid for wind farm applications
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- Electrical Power Engineering - Lecturer
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Cite this

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title = "Current error based compensations for VSC current control in weak grid for wind farm applications",

abstract = "A novel current control strategy is proposed for voltage source converter connecting to weak grid using conventional current vector control with additional current error based voltage angle and magnitude compensations. For connecting to very weak AC network, conventional vector control is proved to be unstable, whereas the proposed current error based compensations can significantly improve system stability. In this way, the proposed control can still benefit from the presence of current closed-loop control without the need for control switching during large AC voltage variations. Comprehensive frequency domain model is established to analyze stability performance. Comprehensive time domain simulations are further carried out to validate its effectiveness and robustness by demonstrating its current control performance during a three-phase fault, multiple-converter situation and various grid strength conditions.",

keywords = "voltage source converter, weak grid, current control, stability, fault current",

author = "Kamyab Givaki and Dong Chen and Lie Xu",

note = "Acceptance in SAN EPSRC-funded - This work is supported in part by the EPSRC, project reference numbers EP/G037728/1S and EP/L014343/1.K.",

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AU - Givaki, Kamyab

AU - Chen, Dong

AU - Xu, Lie

N1 - Acceptance in SAN EPSRC-funded - This work is supported in part by the EPSRC, project reference numbers EP/G037728/1S and EP/L014343/1.K.

PY - 2019/1

Y1 - 2019/1

N2 - A novel current control strategy is proposed for voltage source converter connecting to weak grid using conventional current vector control with additional current error based voltage angle and magnitude compensations. For connecting to very weak AC network, conventional vector control is proved to be unstable, whereas the proposed current error based compensations can significantly improve system stability. In this way, the proposed control can still benefit from the presence of current closed-loop control without the need for control switching during large AC voltage variations. Comprehensive frequency domain model is established to analyze stability performance. Comprehensive time domain simulations are further carried out to validate its effectiveness and robustness by demonstrating its current control performance during a three-phase fault, multiple-converter situation and various grid strength conditions.

AB - A novel current control strategy is proposed for voltage source converter connecting to weak grid using conventional current vector control with additional current error based voltage angle and magnitude compensations. For connecting to very weak AC network, conventional vector control is proved to be unstable, whereas the proposed current error based compensations can significantly improve system stability. In this way, the proposed control can still benefit from the presence of current closed-loop control without the need for control switching during large AC voltage variations. Comprehensive frequency domain model is established to analyze stability performance. Comprehensive time domain simulations are further carried out to validate its effectiveness and robustness by demonstrating its current control performance during a three-phase fault, multiple-converter situation and various grid strength conditions.

KW - voltage source converter

KW - weak grid

KW - current control

KW - stability

KW - fault current

U2 - 10.1109/TSTE.2018.2820386

DO - 10.1109/TSTE.2018.2820386

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JO - IEEE Transactions on Sustainable Energy

JF - IEEE Transactions on Sustainable Energy

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