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Innovative Transformer Life Assessment Considering Moisture and Oil Circulation

Author

Listed:
  • Zhengping Liang

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Yan Fang

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Hao Cheng

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Yongbin Sun

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Bo Li

    (Guangxi Power Transmission and Distribution Network Lightning Protection Engineering Technology Research Center, Guangxi University, Nanning 530004, China)

  • Kai Li

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Wenxuan Zhao

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Zhongxu Sun

    (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

  • Yiyi Zhang

    (Guangxi Power Transmission and Distribution Network Lightning Protection Engineering Technology Research Center, Guangxi University, Nanning 530004, China)

Abstract

Power transformers are one of the most expensive and important equipment in the power system. Significant differences exist in the insulation lifespan of transformers that have been in operation for more than 20 years, and using identical maintenance or scrapping methods may result in significant economic losses. However, most existing transformer life assessment methods only consider the impact of moisture content on the life decay rate without considering the impact of oil circulation cooling modes, which leads to some evaluation errors. In this study, we established a new transformer life assessment method that considers the influence of moisture content and oil circulation cooling modes, which is more accurate than most life assessment methods. Then, the proposed life evaluation method was validated on the on-site transformers, demonstrating its accuracy and effectiveness. The novelty of this study is that it establishes a new on-site transformer life assessment method that considers the comprehensive effect of moisture content and oil circulation cooling mode, which helps to evaluate the remaining lifespan of power transformers more accurately and thus extends the transformer lifespan systematically.

Suggested Citation

  • Zhengping Liang & Yan Fang & Hao Cheng & Yongbin Sun & Bo Li & Kai Li & Wenxuan Zhao & Zhongxu Sun & Yiyi Zhang, 2024. "Innovative Transformer Life Assessment Considering Moisture and Oil Circulation," Energies, MDPI, vol. 17(2), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:2:p:429-:d:1319875
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    References listed on IDEAS

    as
    1. Ariannik, Mohamadreza & Razi-Kazemi, Ali A. & Lehtonen, Matti, 2020. "An approach on lifetime estimation of distribution transformers based on degree of polymerization," Reliability Engineering and System Safety, Elsevier, vol. 198(C).
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