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The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

Author

Listed:
  • Shimin Xue

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)

  • Jingyue Yang

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)

  • Yanxia Chen

    (Beijing Electric Power Corporation, Beijing 100075, China)

  • Cunping Wang

    (Beijing Electric Power Corporation, Beijing 100075, China)

  • Zhe Shi

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)

  • Miao Cui

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)

  • Botong Li

    (Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China)

Abstract

Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring exclusive fault characteristics to AC networks, thus influencing the performance of traditional protections. Since fault characteristics are related to the control schemes of interconnectors, a fault ride-through (FRT) strategy which is applicable to the interconnector operating characteristic of working in four quadrants and capable of eliminating negative-sequence currents under unbalanced fault conditions is proposed first. Then, the additional terms of measured impedances of distance relays caused by fault resistances are derived using a symmetrical component method. Theoretical analysis shows the output currents of interconnectors are controllable after faults, which may cause malfunctions in distance protections installed on lines emanating from interconnectors under the effect of fault resistances. Pilot protection is also inapplicable to lines emanating from interconnectors. Furthermore, a novel pilot protection principle based on the ratio between phase currents and the ratio between negative-sequence currents flowing through both sides is proposed for lines emanating from the interconnectors whose control scheme aims at eliminating negative-sequence currents. The validity of theoretical analysis and the protection principle is verified by PSCAD/EMTDC simulations.

Suggested Citation

  • Shimin Xue & Jingyue Yang & Yanxia Chen & Cunping Wang & Zhe Shi & Miao Cui & Botong Li, 2016. "The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle," Energies, MDPI, vol. 9(6), pages 1-27, May.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:6:p:400-:d:70786
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    Citations

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    Cited by:

    1. Shimin Xue & Junchi Lu & Chong Liu & Yabing Sun & Baibing Liu & Cheng Gu, 2018. "A Novel Single-Terminal Fault Location Method for AC Transmission Lines in a MMC-HVDC-Based AC/DC Hybrid System," Energies, MDPI, vol. 11(8), pages 1-16, August.
    2. Morris Brenna & Federica Foiadelli & Michela Longo & Dario Zaninelli, 2017. "Improvement of Wind Energy Production through HVDC Systems," Energies, MDPI, vol. 10(2), pages 1-25, January.
    3. Goran Grdenić & Marko Delimar, 2017. "Small-Signal Stability Analysis of Interaction Modes in VSC MTDC Systems with Voltage Margin Control," Energies, MDPI, vol. 10(7), pages 1-22, June.
    4. Yingyu Liang & Guanjun Xu & Wenting Zha & Cong Wang, 2019. "Adaptability Analysis of Fault Component Distance Protection on Transmission Lines Connected to Photovoltaic Power Stations," Energies, MDPI, vol. 12(8), pages 1-19, April.

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