Luhan Zu , Stéphane Holé , Nicolas Lallouet , Christian-Éric Bruzek
{"title":"Influence of polypropylene content in PPLP for high voltage insulation at cryogenic temperature","authors":"Luhan Zu , Stéphane Holé , Nicolas Lallouet , Christian-Éric Bruzek","doi":"10.1016/j.elstat.2025.104164","DOIUrl":null,"url":null,"abstract":"<div><div>This study compares the dielectric performance of polypropylene-laminated paper (PPLP) insulation impregnated with liquid nitrogen in the context of high-power superconducting cables within the SCARLET European project. Samples with polypropylene (PP) contents of 43 % and 55 % are tested in a representative cable geometry including almost 20 % gap density in the insulation. Breakdown voltage is found to increase with hydrostatic pressure. Weibull analysis predicts similar breakdown field strength at 63 % probability for both kinds of samples (about 89 kV/mm) but a larger scale parameter for 55 %-PP-content sample (about 10 versus 7). This better performance for 55 % PP content is mitigated by a larger brittleness upon breakdown.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104164"},"PeriodicalIF":2.1000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electrostatics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304388625001366","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This study compares the dielectric performance of polypropylene-laminated paper (PPLP) insulation impregnated with liquid nitrogen in the context of high-power superconducting cables within the SCARLET European project. Samples with polypropylene (PP) contents of 43 % and 55 % are tested in a representative cable geometry including almost 20 % gap density in the insulation. Breakdown voltage is found to increase with hydrostatic pressure. Weibull analysis predicts similar breakdown field strength at 63 % probability for both kinds of samples (about 89 kV/mm) but a larger scale parameter for 55 %-PP-content sample (about 10 versus 7). This better performance for 55 % PP content is mitigated by a larger brittleness upon breakdown.
期刊介绍:
The Journal of Electrostatics is the leading forum for publishing research findings that advance knowledge in the field of electrostatics. We invite submissions in the following areas:
Electrostatic charge separation processes.
Electrostatic manipulation of particles, droplets, and biological cells.
Electrostatically driven or controlled fluid flow.
Electrostatics in the gas phase.