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Fluorinated and Charged Non-woven Polypropylene Electret Fiber Membrane: A Novel Way in Transformer Oil Regeneration

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Abstract

The regeneration of transformer oil is a trending topic in the dielectric research field. However, the normal way of regeneration requires high cost and complicate process. In this paper, the non-woven polypropylene (PP) electret films were modified by fluorination and corona method to achieve the regeneration function for transformer oil. The results show that the C-H bonds in polypropylene were replaced by C-F bonds during the fluorination process, resulting in the mean diameter of the fibers being decreased to a value of 1.7 μm. The increased roughness of the fibers leads to super hydrophobicity. Further research revealed that the insulation properties of aging oil recovered after filtration by corona charged fluorinated fiber membranes. The result is especially significant for breakdown voltage, the values of which reached half of the original insulating oil. In conclusion, the combination of fluorinating and corona charging method on PP fiber membrane shows great potential for insulation oil regeneration.

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Acknowledgement

The authors thank the financial support from China Southern Power Grid (YNKJXM20190709), the National Natural Science Foundation of China (51377176), and project 111 of the Ministry of Education, China (BP0820005).

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Authors and Affiliations

  1. Electric Power Research Institute of Yunnan Power Grid Co., Ltd, Kunming, 650217, China

    Nianrong Zhou, Xiao He, Linshan Zhang & Xiangyu Tan

  2. School of Electrical Engineering, Chongqing University, Chongqing, 400044, China

    Yuyang Yan

  3. Yunnan Power Grid Co., Ltd, Kunming, 650011, China

    Zhengyun Fang

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  1. Nianrong Zhou
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  2. Xiao He
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  4. Xinliang Guo
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  6. Yunhua He
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Correspondence to Yuyang Yan.

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Zhou, N., He, X., Yan, Y. et al. Fluorinated and Charged Non-woven Polypropylene Electret Fiber Membrane: A Novel Way in Transformer Oil Regeneration. Trans. Electr. Electron. Mater. 23, 149–155 (2022). https://doi.org/10.1007/s42341-021-00330-3

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  • DOI: https://doi.org/10.1007/s42341-021-00330-3

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