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Nonlinear conductivity characteristics of epoxy resin-impregnated nano-SiC-modified insulating paper

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Abstract

Epoxy resin-impregnated insulating paper (RIP) is the main insulation of the high-voltage direct-current (HVDC) dry bushing. In order to solve the problem of uneven radial electric field distribution of the bushing, the insulating paper was modified by nano-SiC with filling concentrations of 0-7wt% and impregnated with pure epoxy resin. The dispersibility of nanoparticles was observed by scanning electron microscope. Their conductivity, dielectric, and breakdown properties were tested. The results showed that the electrical conductivity of RIP could be improved by filling it with nano-SiC, and nano-SiC/RIP had obvious nonlinear conductivity characteristics. Comsol-Multiphysics was used to simulate the electric field of the HVDC dry bushing with 0-7wt% nano-SiC/RIP as the main insulation. The simulation results showed that the radial electric field uniformity decreased from 3.04 to 1.20 when concentrations increased from 0 wt% to 7 wt%. Finally, considering the comprehensive factor, 5wt% was considered the optimal doping concentration.

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Acknowledgements

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang, 150080, People’s Republic of China

    Qingguo Chen, Zhonghua Zhang, Song Cheng, Zhihang Zhao & Zhanyi Wang

  2. School of Electrical and Electronic Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang, 150080, People’s Republic of China

    Qingguo Chen, Zhonghua Zhang, Song Cheng, Zhihang Zhao & Zhanyi Wang

  3. State Grid Heilongjiang Electric Power Company Limited Electric Power Research Institute, Harbin, 150030, People’s Republic of China

    Hongda Yang

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  1. Qingguo Chen
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  2. Zhonghua Zhang
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  3. Song Cheng
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  4. Hongda Yang
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  5. Zhihang Zhao
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by QC, ZZ, SC, HY, ZZ, and ZW. The first draft of the manuscript was written by ZZ, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Song Cheng or Hongda Yang.

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Chen, Q., Zhang, Z., Cheng, S. et al. Nonlinear conductivity characteristics of epoxy resin-impregnated nano-SiC-modified insulating paper. J Mater Sci: Mater Electron 33, 17757–17772 (2022). https://doi.org/10.1007/s10854-022-08638-3

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  • DOI: https://doi.org/10.1007/s10854-022-08638-3

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