Dynamic resonance analysis and oscillation damping of multiterminal DC grids

Yuchao Liu; Ali Raza; Kumars Rouzbehi; Binbin Li; Dianguo Xu; Barry W. Williams

doi:10.1109/ACCESS.2017.2740567

Dynamic resonance analysis and oscillation damping of multiterminal DC grids

Yuchao Liu, Ali Raza, Kumars Rouzbehi, Binbin Li, Dianguo Xu, Barry W. Williams

Electronic And Electrical Engineering

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

31 Citations (Scopus)

354 Downloads (Pure)

Abstract

Voltage source converter (VSC) based multi-terminal high voltage direct current (VSC-MTDC) systems/grids are prone to system instability. This critical issue is overlooked in literature. In order to improve the system stability, this paper proposes an effective active damping method as a remedy to suppress voltage and power resonances in the VSC-MTDC grids by injecting damping signals into the inner current loops of VSC-MTDC stations. With dynamic regulation of the damping current, resonance is suppressed by power converter controllers without any additional current and voltage measurement. In this study, modeling and stability analysis of VSC-MTDC system/grid is presented considering the dc-side energy storage components, and control with a droop control structure. Then, single-frequency and multi-frequency resonance mechanisms of dc-bus voltage and power in the event of transients are analyzed. Later, stability effect of MTDC system/grid inductance and capacitance values to the resonance amplitude and frequency droop coefficients is investigated. A PSCAD/EMTDC platform is developed to conduct dynamic simulations, and a scaled-down four-terminal 20 kW experimental prototype is used to validate the effectiveness of proposed control methodology.

Original language	English
Pages (from-to)	16974-16984
Number of pages	11
Journal	IEEE Access
Volume	5
DOIs	https://doi.org/10.1109/ACCESS.2017.2740567
Publication status	Published - 27 Aug 2017

Keywords

active damping
dc-LC filter
Multi-Terminal
resonance suppression
VSC-HVDC

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Liu-etal-IEEE-Access-2017-Dynamic-resonance-analysis-and-oscillation-damping-of-multi-terminal-DC-gridsFinal published version, 0.99 MB

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title = "Dynamic resonance analysis and oscillation damping of multiterminal DC grids",

abstract = "Voltage source converter (VSC) based multi-terminal high voltage direct current (VSC-MTDC) systems/grids are prone to system instability. This critical issue is overlooked in literature. In order to improve the system stability, this paper proposes an effective active damping method as a remedy to suppress voltage and power resonances in the VSC-MTDC grids by injecting damping signals into the inner current loops of VSC-MTDC stations. With dynamic regulation of the damping current, resonance is suppressed by power converter controllers without any additional current and voltage measurement. In this study, modeling and stability analysis of VSC-MTDC system/grid is presented considering the dc-side energy storage components, and control with a droop control structure. Then, single-frequency and multi-frequency resonance mechanisms of dc-bus voltage and power in the event of transients are analyzed. Later, stability effect of MTDC system/grid inductance and capacitance values to the resonance amplitude and frequency droop coefficients is investigated. A PSCAD/EMTDC platform is developed to conduct dynamic simulations, and a scaled-down four-terminal 20 kW experimental prototype is used to validate the effectiveness of proposed control methodology.",

keywords = "active damping, dc-LC filter, Multi-Terminal, resonance suppression, VSC-HVDC",

author = "Yuchao Liu and Ali Raza and Kumars Rouzbehi and Binbin Li and Dianguo Xu and Williams, {Barry W.}",

note = "(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.",

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AU - Liu, Yuchao

AU - Raza, Ali

AU - Rouzbehi, Kumars

AU - Li, Binbin

AU - Xu, Dianguo

AU - Williams, Barry W.

N1 - (c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.

PY - 2017/8/27

Y1 - 2017/8/27

N2 - Voltage source converter (VSC) based multi-terminal high voltage direct current (VSC-MTDC) systems/grids are prone to system instability. This critical issue is overlooked in literature. In order to improve the system stability, this paper proposes an effective active damping method as a remedy to suppress voltage and power resonances in the VSC-MTDC grids by injecting damping signals into the inner current loops of VSC-MTDC stations. With dynamic regulation of the damping current, resonance is suppressed by power converter controllers without any additional current and voltage measurement. In this study, modeling and stability analysis of VSC-MTDC system/grid is presented considering the dc-side energy storage components, and control with a droop control structure. Then, single-frequency and multi-frequency resonance mechanisms of dc-bus voltage and power in the event of transients are analyzed. Later, stability effect of MTDC system/grid inductance and capacitance values to the resonance amplitude and frequency droop coefficients is investigated. A PSCAD/EMTDC platform is developed to conduct dynamic simulations, and a scaled-down four-terminal 20 kW experimental prototype is used to validate the effectiveness of proposed control methodology.

AB - Voltage source converter (VSC) based multi-terminal high voltage direct current (VSC-MTDC) systems/grids are prone to system instability. This critical issue is overlooked in literature. In order to improve the system stability, this paper proposes an effective active damping method as a remedy to suppress voltage and power resonances in the VSC-MTDC grids by injecting damping signals into the inner current loops of VSC-MTDC stations. With dynamic regulation of the damping current, resonance is suppressed by power converter controllers without any additional current and voltage measurement. In this study, modeling and stability analysis of VSC-MTDC system/grid is presented considering the dc-side energy storage components, and control with a droop control structure. Then, single-frequency and multi-frequency resonance mechanisms of dc-bus voltage and power in the event of transients are analyzed. Later, stability effect of MTDC system/grid inductance and capacitance values to the resonance amplitude and frequency droop coefficients is investigated. A PSCAD/EMTDC platform is developed to conduct dynamic simulations, and a scaled-down four-terminal 20 kW experimental prototype is used to validate the effectiveness of proposed control methodology.

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KW - resonance suppression

KW - VSC-HVDC

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Dynamic resonance analysis and oscillation damping of multiterminal DC grids

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