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S-Transform Based Traveling Wave Directional Pilot Protection for Hybrid LCC-MMC-HVDC Transmission Line

Author

Listed:
  • Wei Zhang

    (School of Automation and Electronic Engineering, Qingdao University of Science & Technology, Qingdao 266061, China)

  • Dong Wang

    (School of Automation and Electronic Engineering, Qingdao University of Science & Technology, Qingdao 266061, China)

Abstract

In this paper, the traveling wave protection issue of a hybrid high-voltage direct-current transmission line based on the line-commutated converter and modular multilevel converter is investigated. Generally, traveling wave protection based on voltage variation criterion, voltage variation rate criterion and current variation rate criterion is applied on hybrid high-voltage direct-current transmission lines as primary protection. There are two issues that should be addressed: (i) it has no fault direction identification capability which may cause wrong operation regarding external faults; and (ii) it does not consider the difference between line-commutated converter based rectifier station topology and modular multilevel converter based inverter station topology. Therefore, a novel traveling wave directional pilot protection principle for the hybrid high-voltage direct-current transmission line is proposed based on the S-transform. Firstly, the data processing capability of S-transform is described. Secondly, the typical traveling wave propagation process on a hybrid high-voltage direct-current transmission line is studied. Thirdly, a novel traveling wave fault direction identification principle is proposed. Eventually, based on PSCAD/EMTDC, a typical ±400 kV hybrid high-voltage direct-current transmission system is used for a case study to verify its robustness against fault location, fault resistance and fault type.

Suggested Citation

  • Wei Zhang & Dong Wang, 2022. "S-Transform Based Traveling Wave Directional Pilot Protection for Hybrid LCC-MMC-HVDC Transmission Line," Energies, MDPI, vol. 15(13), pages 1-13, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4802-:d:852626
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    References listed on IDEAS

    as
    1. Dong Wang & Houlei Gao & Sibei Luo & Guibin Zou, 2015. "Ultra-High-Speed Travelling Wave Protection of Transmission Line Using Polarity Comparison Principle Based on Empirical Mode Decomposition," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-9, October.
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