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A New Principle of Distance Protection for the UHV GIL-Overhead Hybrid Line Based on Frequency Domain Lossless Transmission Line Equation

Author

Listed:
  • Botong Li

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

  • Tianfeng Gu

    (The State Grid Tianjin Chengdong Electric Power Supply Company, Tianjin 300010, China)

  • Bin Li

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

  • Xiaolong Chen

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

  • Weijie Wen

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

Abstract

The Gas-insulated Line (GIL) is a technical equipment that allows power transmission underground at high voltage level. The UHV GIL-overhead hybrid transmission line is an essential way for power transmission in complicated landscapes. Because of the distributed capacitance of the UHV transmission line and the difference of the structure and the electrical parameters between GIL and overhead transmission line, the distance protection based on uniform lumped parameters cannot be applied to this hybrid transmission line directly. In order to overcome the shortcomings, this paper studies and proposes a new principle of distance protection for the UHV GIL-overhead hybrid transmission line based on frequency domain lossless transmission line equation, with the distributed capacitance accounted. Then, the paper presents a setting scheme for this distance protection with the hybrid line parameters considered. Finally, tests are carried out on the Power Systems Computer Aided Design (PSCAD) platform, and the accuracy and reliability of the distance protection method proposed are verified by simulation results.

Suggested Citation

  • Botong Li & Tianfeng Gu & Bin Li & Xiaolong Chen & Weijie Wen, 2019. "A New Principle of Distance Protection for the UHV GIL-Overhead Hybrid Line Based on Frequency Domain Lossless Transmission Line Equation," Energies, MDPI, vol. 12(23), pages 1-12, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:23:p:4481-:d:290592
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    References listed on IDEAS

    as
    1. Roberto Benato & Sebastian Dambone Sessa & Fabio Guglielmi & Ertugrul Partal & Nasser Tleis, 2014. "Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables," Energies, MDPI, vol. 7(12), pages 1-16, December.
    2. Petar Sarajcev, 2011. "Numerical Analysis of the Magnetic Field of High-Current Busducts and GIL Systems," Energies, MDPI, vol. 4(12), pages 1-16, December.
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