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

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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.
Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
Number of pages8
PublisherIEEE Press
Publication dateSep 2019
Pages5191-5198
Article number8912571
ISBN (Electronic)9781728103952
DOIs
Publication statusPublished - Sep 2019
Event2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, United States
Duration: 29 Sep 20193 Oct 2019

Conference

Conference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
CountryUnited States
City Baltimore
Period29/09/201903/10/2019
Series2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

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Keywords

  • Grid-Connection
  • Voltage-Source Converter
  • Grid Fault
  • Transient Stability
  • Fault Ride-Through

Cite this

Taul, M. G., Wang, X., Davari, P., & Blaabjerg, F. (2019). Systematic Approach for Transient Stability Evaluation of Grid-Tied Converters during Power System Faults. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 5191-5198). [8912571] IEEE Press. 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 https://doi.org/10.1109/ECCE.2019.8912571