{"title":"挤压聚丙烯高压电缆绝缘中的电气树","authors":"J. Holto, E. Ildstad","doi":"10.1109/ICHVE.2010.5640748","DOIUrl":null,"url":null,"abstract":"In this study electrical tree growth in extruded isotactic and syndiotactic polypropylene (i-PP and s-PP) was compared, using a needle-plane geometry. Two main types of treeing were observed, either with one or multiple branches to the ground electrode before breakdown. Highest degree of simple branched trees was found in s-PP. The degree of crystallinity in s-PP was 53% lower than in i- PP and the spherulites size was found to be 5-15 times larger in i-PP than the crystalline areas observed in s-PP. The elasticity modulus for s-PP was half of that measured for i-PP. Despite these differences no significant difference in the propagation rate or time to breakdown during electrical tree growth was found.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"24 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Electrical treeing in extruded polypropylene high voltage cable insulation\",\"authors\":\"J. Holto, E. Ildstad\",\"doi\":\"10.1109/ICHVE.2010.5640748\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this study electrical tree growth in extruded isotactic and syndiotactic polypropylene (i-PP and s-PP) was compared, using a needle-plane geometry. Two main types of treeing were observed, either with one or multiple branches to the ground electrode before breakdown. Highest degree of simple branched trees was found in s-PP. The degree of crystallinity in s-PP was 53% lower than in i- PP and the spherulites size was found to be 5-15 times larger in i-PP than the crystalline areas observed in s-PP. The elasticity modulus for s-PP was half of that measured for i-PP. Despite these differences no significant difference in the propagation rate or time to breakdown during electrical tree growth was found.\",\"PeriodicalId\":287425,\"journal\":{\"name\":\"2010 International Conference on High Voltage Engineering and Application\",\"volume\":\"24 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2010-11-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2010 International Conference on High Voltage Engineering and Application\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICHVE.2010.5640748\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 International Conference on High Voltage Engineering and Application","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICHVE.2010.5640748","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Electrical treeing in extruded polypropylene high voltage cable insulation
In this study electrical tree growth in extruded isotactic and syndiotactic polypropylene (i-PP and s-PP) was compared, using a needle-plane geometry. Two main types of treeing were observed, either with one or multiple branches to the ground electrode before breakdown. Highest degree of simple branched trees was found in s-PP. The degree of crystallinity in s-PP was 53% lower than in i- PP and the spherulites size was found to be 5-15 times larger in i-PP than the crystalline areas observed in s-PP. The elasticity modulus for s-PP was half of that measured for i-PP. Despite these differences no significant difference in the propagation rate or time to breakdown during electrical tree growth was found.
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