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Dual-Temperature Evaluation of a High-Temperature Insulation System for Liquid-Immersed Transformer

Author

Listed:
  • Xiaojing Zhang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, China)

  • Lu Ren

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, China)

  • Haichuan Yu

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, China)

  • Yang Xu

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, China)

  • Qingquan Lei

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No.28 Xianning West Road, Xi’an 710049, China)

  • Xin Li

    (Electric Power Research Institute of Guangdong Power Grid Corporation, No.6–8 Dongfeng East Road, Guangzhou 510062, China)

  • Baojia Han

    (Guangdong Zhongpeng Electricity Co., Ltd., No.19 Qianjin Road, Foshan 528000, China)

Abstract

A high-temperature oil–paper insulation system offers an opportunity to improve the overloading capability of distribution transformers facing seasonal load variation. A high-temperature electrical insulation system (EIS) was chosen due to thermal calculation based on a typical loading curve on the China Southern Power Grid. In order to evaluate candidate high-temperature insulation systems, Nomex ® T910 (aramid-enhanced cellulose) immersed in FR3 (natural ester) was investigated by a dual-temperature thermal aging test compared with a conventional insulation system, Kraft paper impregnated with mineral oil. Throughout the thermal aging test, mechanical, chemical, and dielectric parameters of both paper and insulating oil were investigated in each aging cycle. The thermal aging results determined that the thermal class of the FR3-T910 insulation system meets the request of overloading transformer needs.

Suggested Citation

  • Xiaojing Zhang & Lu Ren & Haichuan Yu & Yang Xu & Qingquan Lei & Xin Li & Baojia Han, 2018. "Dual-Temperature Evaluation of a High-Temperature Insulation System for Liquid-Immersed Transformer," Energies, MDPI, vol. 11(8), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:1957-:d:160421
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    Citations

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    Cited by:

    1. Issouf Fofana & U. Mohan Rao, 2018. "Engineering Dielectric Liquid Applications," Energies, MDPI, vol. 11(10), pages 1-4, October.
    2. Sifeddine Abdi & Abderrahmane Manu Haddad & Noureddine Harid & Ahmed Boubakeur, 2022. "Modelling the Effect of Thermal Aging on Transformer Oil Electrical Characteristics Using a Regression Approach," Energies, MDPI, vol. 16(1), pages 1-12, December.
    3. Przemyslaw Goscinski & Zbigniew Nadolny & Andrzej Tomczewski & Ryszard Nawrowski & Tomasz Boczar, 2023. "The Influence of Heat Transfer Coefficient α of Insulating Liquids on Power Transformer Cooling Systems," Energies, MDPI, vol. 16(6), pages 1-15, March.
    4. Sifeddine Abdi & Noureddine Harid & Leila Safiddine & Ahmed Boubakeur & Abderrahmane (Manu) Haddad, 2021. "The Correlation of Transformer Oil Electrical Properties with Water Content Using a Regression Approach," Energies, MDPI, vol. 14(8), pages 1-14, April.

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