A less-intrusive approach to stabilize VSC transmission against highly variable grid strength

Zehua  Zhang; Dong Chen; Kamyab Givaki; Lie Xu

doi:10.1109/JESTPE.2020.3030362

A less-intrusive approach to stabilize VSC transmission against highly variable grid strength

Zehua Zhang , Dong Chen, Kamyab Givaki, Lie Xu

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

25 Downloads (Pure)

Abstract

A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a pre-requisite to stabilization. By partially imposing grid forming control, a simple auxiliary outer loop is proposed to exhaust the physical limit of power delivery in steady state and provide support to fault-ride-through operations over a wide range of grid strength. The proposed control can be used to upgrade a commissioned VSC with inner current loop intact; it also offers a non-intrusive solution to stabilize VSCs externally. The effectiveness of the proposed schemes are verified by analysis in frequency domain and simulations in Electromagnetic Transient (EMT) time domain considering change of grid strength and fault-ride-through.

Original language	English
Article number	3030362
Journal	IEEE Journal of Emerging and Selected Topics in Power Electronics
Early online date	12 Oct 2020
DOIs	https://doi.org/10.1109/JESTPE.2020.3030362
Publication status	E-pub ahead of print - 12 Oct 2020

Keywords

voltage source converter
weak grids
voltage stability
voltage sensitivity
stabilization
damping
fault-ridethrough

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10.1109/JESTPE.2020.3030362

Zhang-etal-IEEE-JESTPE-2020-A-less-intrusive-approach-to-stabilize-VSC-transmissionAccepted author manuscript, 2.01 MB

Cite this

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title = "A less-intrusive approach to stabilize VSC transmission against highly variable grid strength",

abstract = "A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a pre-requisite to stabilization. By partially imposing grid forming control, a simple auxiliary outer loop is proposed to exhaust the physical limit of power delivery in steady state and provide support to fault-ride-through operations over a wide range of grid strength. The proposed control can be used to upgrade a commissioned VSC with inner current loop intact; it also offers a non-intrusive solution to stabilize VSCs externally. The effectiveness of the proposed schemes are verified by analysis in frequency domain and simulations in Electromagnetic Transient (EMT) time domain considering change of grid strength and fault-ride-through.",

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

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AU - Zhang , Zehua

AU - Chen, Dong

AU - Givaki, Kamyab

AU - Xu, Lie

N1 - © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2020/10/12

Y1 - 2020/10/12

N2 - A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a pre-requisite to stabilization. By partially imposing grid forming control, a simple auxiliary outer loop is proposed to exhaust the physical limit of power delivery in steady state and provide support to fault-ride-through operations over a wide range of grid strength. The proposed control can be used to upgrade a commissioned VSC with inner current loop intact; it also offers a non-intrusive solution to stabilize VSCs externally. The effectiveness of the proposed schemes are verified by analysis in frequency domain and simulations in Electromagnetic Transient (EMT) time domain considering change of grid strength and fault-ride-through.

AB - A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a pre-requisite to stabilization. By partially imposing grid forming control, a simple auxiliary outer loop is proposed to exhaust the physical limit of power delivery in steady state and provide support to fault-ride-through operations over a wide range of grid strength. The proposed control can be used to upgrade a commissioned VSC with inner current loop intact; it also offers a non-intrusive solution to stabilize VSCs externally. The effectiveness of the proposed schemes are verified by analysis in frequency domain and simulations in Electromagnetic Transient (EMT) time domain considering change of grid strength and fault-ride-through.

KW - voltage source converter

KW - weak grids

KW - voltage stability

KW - voltage sensitivity

KW - stabilization

KW - damping

KW - fault-ridethrough

U2 - 10.1109/JESTPE.2020.3030362

DO - 10.1109/JESTPE.2020.3030362

M3 - Article

SN - 2168-6777

JO - IEEE Journal of Emerging and Selected Topics in Power Electronics

JF - IEEE Journal of Emerging and Selected Topics in Power Electronics

M1 - 3030362

ER -

A less-intrusive approach to stabilize VSC transmission against highly variable grid strength

Abstract

Keywords

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