Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults

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Resumé

Grid-tied converters subject to severe grid faults might experience transient instability and loss of synchronization. As studying this phenomenon deals with large-signal disturbances, a linearized equivalent will no longer be an accurate approximation of the system. Consequently, a highly used approach is to perform time-domain simulation studies of a detailed model of the system to assess the transient stability and overall performance. However, such an approach might result in a large computational burden and limited physical insight to the system. To address this issue, this paper presents a systematic approach to assess the transient stability of the inherently nonlinear problem alongside an methodology for setting the control parameters to avert transient instability. Using a simplified model for the converter, it is shown that phase-plane analysis is accurate for analyzing the transient synchronization stability. To that end, a critical damping ratio of the phase-locked loop can be found to identify the domain of attraction of the state trajectories, which has been experimentally verified. Using this together with an engineering insight to the system, one can set the controller parameters of the phase-locked loop such to guarantee stability during severe grid faults and perform worst-case planning settings for the controller and protection devices.
OriginalsprogEngelsk
TitelProceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Antal sider8
ForlagIEEE Press
Publikationsdatosep. 2019
Sider5191-5198
DOI
StatusUdgivet - sep. 2019
Begivenhed2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, USA
Varighed: 29 sep. 20193 okt. 2019

Konference

Konference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
LandUSA
By Baltimore
Periode29/09/201903/10/2019

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Power converters
Phase locked loops
Synchronization
Controllers
Damping
Trajectories
Planning

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@inproceedings{0cde4d1b306f44b7bf586f796743faaf,
title = "Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults",
abstract = "Grid-tied converters subject to severe grid faults might experience transient instability and loss of synchronization. As studying this phenomenon deals with large-signal disturbances, a linearized equivalent will no longer be an accurate approximation of the system. Consequently, a highly used approach is to perform time-domain simulation studies of a detailed model of the system to assess the transient stability and overall performance. However, such an approach might result in a large computational burden and limited physical insight to the system. To address this issue, this paper presents a systematic approach to assess the transient stability of the inherently nonlinear problem alongside an methodology for setting the control parameters to avert transient instability. Using a simplified model for the converter, it is shown that phase-plane analysis is accurate for analyzing the transient synchronization stability. To that end, a critical damping ratio of the phase-locked loop can be found to identify the domain of attraction of the state trajectories, which has been experimentally verified. Using this together with an engineering insight to the system, one can set the controller parameters of the phase-locked loop such to guarantee stability during severe grid faults and perform worst-case planning settings for the controller and protection devices.",
keywords = "Grid-Connection, Voltage-Source Converter, Grid Fault, Transient Stability, Fault Ride-Through",
author = "Taul, {Mads Graungaard} and Xiongfei Wang and Pooya Davari and Frede Blaabjerg",
year = "2019",
month = "9",
doi = "10.1109/ECCE.2019.8912571",
language = "English",
pages = "5191--5198",
booktitle = "Proceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE)",
publisher = "IEEE Press",

}

Taul, MG, Wang, X, Davari, P & Blaabjerg, F 2019, Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults. i Proceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press, s. 5191-5198, 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, USA, 29/09/2019. https://doi.org/10.1109/ECCE.2019.8912571

Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults. / Taul, Mads Graungaard; Wang, Xiongfei; Davari, Pooya; Blaabjerg, Frede.

Proceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Press, 2019. s. 5191-5198.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults

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AU - Wang, Xiongfei

AU - Davari, Pooya

AU - Blaabjerg, Frede

PY - 2019/9

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N2 - Grid-tied converters subject to severe grid faults might experience transient instability and loss of synchronization. As studying this phenomenon deals with large-signal disturbances, a linearized equivalent will no longer be an accurate approximation of the system. Consequently, a highly used approach is to perform time-domain simulation studies of a detailed model of the system to assess the transient stability and overall performance. However, such an approach might result in a large computational burden and limited physical insight to the system. To address this issue, this paper presents a systematic approach to assess the transient stability of the inherently nonlinear problem alongside an methodology for setting the control parameters to avert transient instability. Using a simplified model for the converter, it is shown that phase-plane analysis is accurate for analyzing the transient synchronization stability. To that end, a critical damping ratio of the phase-locked loop can be found to identify the domain of attraction of the state trajectories, which has been experimentally verified. Using this together with an engineering insight to the system, one can set the controller parameters of the phase-locked loop such to guarantee stability during severe grid faults and perform worst-case planning settings for the controller and protection devices.

AB - Grid-tied converters subject to severe grid faults might experience transient instability and loss of synchronization. As studying this phenomenon deals with large-signal disturbances, a linearized equivalent will no longer be an accurate approximation of the system. Consequently, a highly used approach is to perform time-domain simulation studies of a detailed model of the system to assess the transient stability and overall performance. However, such an approach might result in a large computational burden and limited physical insight to the system. To address this issue, this paper presents a systematic approach to assess the transient stability of the inherently nonlinear problem alongside an methodology for setting the control parameters to avert transient instability. Using a simplified model for the converter, it is shown that phase-plane analysis is accurate for analyzing the transient synchronization stability. To that end, a critical damping ratio of the phase-locked loop can be found to identify the domain of attraction of the state trajectories, which has been experimentally verified. Using this together with an engineering insight to the system, one can set the controller parameters of the phase-locked loop such to guarantee stability during severe grid faults and perform worst-case planning settings for the controller and protection devices.

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