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The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network

Author

Listed:
  • Zhonghuan Su

    (College of Electrical and Information Engineering, Hunan University, Changsha 410000, China
    TBEA Hengyang Transformer Co., Ltd., Hengyang 421000, China)

  • Longfu Luo

    (College of Electrical and Information Engineering, Hunan University, Changsha 410000, China)

  • Jun Liu

    (College of Electrical and Information Engineering, Hunan University, Changsha 410000, China)

  • Zhongxiang Li

    (College of Electrical and Information Engineering, Hunan University, Changsha 410000, China)

  • Hu Luo

    (College of Electrical and Information Engineering, Hunan University, Changsha 410000, China)

  • Haonan Bai

    (Key Laboratory of Special Motors and High Voltage Electrical Appliances, Ministry of Education Shenyang University of Technology, Shenyang 110870, China)

Abstract

The FDS (Frequency-domain Dielectric Spectroscopy) of oil-immersed insulation paper, and semi-conductive paper with different moisture content, has been measured. The data measured are fitted as a function of frequency and moisture content using the amendatory Cole–Cole model utilizing the least square technique. Then, the broadband MTL model of the insulation system of IOCT (Inverted-type Oil-immersed Current Transformer) is established considering the capacitive electrodes thin layer, and the distribution parameters consider the moisture and frequency dependence. A new method for VFTO (Very Fast Transient Overvoltage) distribution calculation of insulation systems is proposed.

Suggested Citation

  • Zhonghuan Su & Longfu Luo & Jun Liu & Zhongxiang Li & Hu Luo & Haonan Bai, 2022. "The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network," Energies, MDPI, vol. 15(2), pages 1-13, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:2:p:514-:d:722592
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    References listed on IDEAS

    as
    1. Bo Qi & Quanmin Dai & Chengrong Li & Zipeng Zeng & Mingli Fu & Ran Zhuo, 2018. "The Mechanism and Diagnosis of Insulation Deterioration Caused by Moisture Ingress into Oil-Impregnated Paper Bushing," Energies, MDPI, vol. 11(6), pages 1-12, June.
    2. Youyuan Wang & Kun Xiao & Bijun Chen & Yuanlong Li, 2015. "Study of the Impact of Initial Moisture Content in Oil Impregnated Insulation Paper on Thermal Aging Rate of Condenser Bushing," Energies, MDPI, vol. 8(12), pages 1-13, December.
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