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Impacts of Grid-Forming Inverters on Distance Protection
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  • Henrik Johansson,
  • Qianli Xing,
  • Nathaniel Taylor,
  • Xiongfei Wang
Henrik Johansson
KTH Royal Institute of Technology

Corresponding Author:hjo5@kth.se

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Qianli Xing
KTH Royal Institute of Technology
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Nathaniel Taylor
KTH Royal Institute of Technology
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Xiongfei Wang
KTH Royal Institute of Technology
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Abstract

javascript:void(0) Grid-forming (GFM) inverters are anticipated to play an essential role in facilitating the integration of renewable energy in bulk power systems. The fault-ride through (FRT) of GFM inverters and its impact on traditional protection schemes is an ongoing research topic. Distance protection is today one of the most commonly applied protection schemes and depends on multiple system preconditions for reliable operation — many of which may no longer hold in systems with a high penetration of inverters. This paper investigates the impacts of GFM inverters on distance protection, with the main objective to provide an improved understanding of the topic. Important interoperability issues are highlighted with simulation results and elaborated upon based on the theory behind the distance relay model and the behaviors of GFM inverters during faults. The simulations consider numerous fault types and two GFM inverters employing different current-limiting control techniques in their FRT strategies.
31 Aug 2024Submitted to IET Generation, Transmission & Distribution
02 Sep 2024Submission Checks Completed
02 Sep 2024Assigned to Editor
03 Sep 2024Review(s) Completed, Editorial Evaluation Pending
09 Sep 2024Reviewer(s) Assigned