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Effect of Moisture Content on the Performance of PPLP as a Dielectric for HTS Power Cable


Affiliations
1 Indian Institute of Technology, Kharagpur – 721302, West Bengal, India
2 SuperQ Technologies India Pvt. Ltd., Bengaluru – 560045, Karnataka, India
     

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For the operation of High Temperature Superconducting (HTS) power cables at high voltage levels, the electric field distribution depends on the relative permittivity of dielectric materials. In HTS cables, PolyPropylene Laminated Paper (PPLP) is used as a cold dielectric material and is wrapped helically along the length of the conductor thereby electrically insulating it. During the installation and maintenance process of HTS cables, termination units and joint boxes, the PPLP is often exposed to moisture. The presence of moisture affects the dielectric breakdown strength and dielectric losses. The effect of moisture content in PPLP at ambient and liquid nitrogen temperature has been studied to determine the breakdown strength, relative permittivity (εr) and dissipation factor (tan δ). Effect of moisture content on the performance of PPLP via the measurement of dielectric breakdown strength and relative permittivity for various temperatures and moisture content are discussed in this paper.

Keywords

Dielectric Breakdown Strength, HTS Cable, Moisture Content, Relative Permittivity, PPLP
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  • Kwon Ik-Soo, et al. Comparison of the electrical conductivity of polypropylene laminated paper (PPLP) and kraft in LN 2 according to the number of layers. IEEE Transactions on Applied Superconductivity. 2016; 26(4):1–5. https://doi. org/10.1109/TASC.2016.2550182

  • Cheon HG, et al. A study on thickness effect of HTS cable for insulation design. Journal of Physics: Conference Series. 2006. 43(1). https://doi.org/10.1088/1742-6596/43/1/217

  • Choi J-W, et al. A study on insulation characteristics of laminated polypropylene paper for an HTS cable. IEEE Transactions on Applied Superconductivity. 2010; 20(3):1280–3. https://doi.org/10.1109/TASC.2010.2044235

  • Du H, et al. Insights on the breakdown characteristics of PPLP under different test protocols and temperatures. IEEE Transactions on Applied Superconductivity. 2020; 30(6):1– 6. https://doi.org/10.1109/TASC.2020.2986450

  • Wei B, et al. A study of the composite insulation breakdown properties for wrapping cables in liquid nitrogen. IEEE Transactions on Applied Superconductivity. 2014; 25(1):1– 6. https://doi.org/10.1109/TASC.2014.2357753

  • Gromoll D, Schumacher R, Humpert C. Dielectric characteristics of polypropylene laminated paper in liquid nitrogen for superconducting devices of the high-voltage grid. 2018 7th International Energy and Sustainability Conference (IESC). IEEE; 2018. https://doi.org/10.1109/ IESC.2018.8439987

  • Garzem M, et al. Breakdown and partial discharge characteristics of transformer board and insulating paper materials in liquid nitrogen. IEEE Transactions on Applied Superconductivity. 2018; 28(4):1–5. https://doi. org/10.1109/TASC.2018.2805166

  • Hayakawa N, et al. Dielectric characteristics of HTS cables based on partial discharge measurement. IEEE Transactions on Applied Superconductivity. 2005; 15(2):1802–5. https:// doi.org/10.1109/TASC.2005.849292

  • Seo I-J, et al. Experimental and analytical study of the DC breakdown characteristics of polypropylene laminated paper with a butt gap condition considering the insulation design of superconducting cable. Japanese Journal of Applied Physics. 2014; 53(8S3). https://doi.org/10.7567/ JJAP.53.08NL04

  • Nagao M, et al. Dielectric breakdown mechanism of polypropylene laminated paper in liquid nitrogen. 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena. IEEE; 2011. https://doi.org/10.1109/ CEIDP.2011.6232684

  • Park C, et al. The characteristics of film capacitors at room temperature and in liquid nitrogen. 2018 AIAA/IEEE Electric Aircraft Technologies Symposium (EATS). IEEE; 2018. https://doi.org/10.2514/6.2018-5014

  • Available from: https://www.aplab.com/test-measurement/ component-testers.html

  • Masood A, Zuberi MU, Husain E. Breakdown strength of solid dielectrics in liquid nitrogen. IEEE Transactions on Dielectrics and Electrical Insulation. 2008; 15(4):1051–5. https://doi.org/10.1109/TDEI.2008.4591227


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  • Effect of Moisture Content on the Performance of PPLP as a Dielectric for HTS Power Cable

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Authors

Maalika Sarkar
Indian Institute of Technology, Kharagpur – 721302, West Bengal, India
Isaac De Souza
Indian Institute of Technology, Kharagpur – 721302, West Bengal, India
Abhik Sarkar
SuperQ Technologies India Pvt. Ltd., Bengaluru – 560045, Karnataka, India
Abhay Singh Gour
Indian Institute of Technology, Kharagpur – 721302, West Bengal, India
Vutukuru Vasudeva Rao
Indian Institute of Technology, Kharagpur – 721302, West Bengal, India

Abstract


For the operation of High Temperature Superconducting (HTS) power cables at high voltage levels, the electric field distribution depends on the relative permittivity of dielectric materials. In HTS cables, PolyPropylene Laminated Paper (PPLP) is used as a cold dielectric material and is wrapped helically along the length of the conductor thereby electrically insulating it. During the installation and maintenance process of HTS cables, termination units and joint boxes, the PPLP is often exposed to moisture. The presence of moisture affects the dielectric breakdown strength and dielectric losses. The effect of moisture content in PPLP at ambient and liquid nitrogen temperature has been studied to determine the breakdown strength, relative permittivity (εr) and dissipation factor (tan δ). Effect of moisture content on the performance of PPLP via the measurement of dielectric breakdown strength and relative permittivity for various temperatures and moisture content are discussed in this paper.

Keywords


Dielectric Breakdown Strength, HTS Cable, Moisture Content, Relative Permittivity, PPLP

References





DOI: https://doi.org/10.33686/prj.v18i1.222127