Integrated Sequence Component-based Non-unit Protection Scheme for Lines Incorporating IBRs at Both Sides During Single-phase Grounding Faults

Xiaodong Zheng; Menghan Wu; Chenxu Chao; Yang Weng; Nengling Tai

doi:10.23919/PCMP.2025.000403

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Integrated Sequence Component-based Non-unit Protection Scheme for Lines Incorporating IBRs at Both Sides During Single-phase Grounding Faults

更新时间：2026-09-21

- Integrated Sequence Component-based Non-unit Protection Scheme for Lines Incorporating IBRs at Both Sides During Single-phase Grounding Faults
- Protection and Control of Modern Power Systems Vol. 11, Issue 5, Pages: 130-142(2026)
- 作者机构：
  
  1. School of Electrical Engineering, Shanghai Jiao Tong University,Shanghai,China
  2. Department of Electrical Engineering, Tongji University,Shanghai,China
  3. School of Electrical, Computer and Energy Engineering, Arizona State University,Tempe,USA
- 作者简介：
- 基金信息：
- DOI：10.23919/PCMP.2025.000403
  CLC：
- Published：01 September 2026
- 稿件说明：
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Xiaodong Zheng, Menghan Wu, Chenxu Chao, et al. Integrated Sequence Component-based Non-unit Protection Scheme for Lines Incorporating IBRs at Both Sides During Single-phase Grounding Faults[J]. Protection and Control of Modern Power Systems, 2026, 11(5): 130-142.
DOI：

Xiaodong Zheng, Menghan Wu, Chenxu Chao, et al. Integrated Sequence Component-based Non-unit Protection Scheme for Lines Incorporating IBRs at Both Sides During Single-phase Grounding Faults[J]. Protection and Control of Modern Power Systems, 2026, 11(5): 130-142. DOI： 10.23919/PCMP.2025.000403.

摘要

Abstract

When single-phase grounding (SPG) faults occur in lines with inverter-based resources (IBRs) at both ends

traditional non-unit protections may malfunction due to the limited amplitude and controlled phase of zero-sequence current. To address this issue

this paper proposes an integrated sequence component-based non-unit protection scheme. By calculating the remote zero-sequence current using only local components

the method eliminates the need for real-time communication. The resulting fault distance calculation is highly resilient to fault resistance and is independent of positive-sequence current injections by IBRs. The proposed method seamlessly meets the reactive power support requirements of various grid codes. Simulation results confirm the effectiveness of the proposed method for SPG fault protection for lines with IBRs at both ends.

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Keywords

references

1. X. Gao, G. Song, and C. Cui et al., ( 2025, Jul. ), “A fault handling scheme in low frequency transmission system based on sequence-control of M3C,” CSEE Journal of Power and Energy Systems , [Online ] , pp. 1–11. Available: https://ieeexplore.ieee.org/document/11069385

19. M. Wu, X. Zheng, and C. Chao et al., ( 2026, May ), “Coordinated control and protection strategy for transmission lines connected to grid-forming inverter-based resources,” IEEE Transactions on Power Delivery , [Online ] , pp. 1–12. Available: https://ieeexplore.ieee.org/document/11520940

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