{"title":"暴露在直流电压下的水树生长","authors":"T. Czaszejko","doi":"10.1109/ICPADM.1994.414037","DOIUrl":null,"url":null,"abstract":"A laboratory experiment was performed in order to determine the influence of a short exposure to DC voltage on the growth of water trees in XLPE cable insulation. The results are of some practical importance, for a DC test voltage is commonly used by utilities when re-commissioning polymeric cable systems which have been previously energised. An accelerated water tree growth from a needle electrode was induced on the surface of samples of cable insulation. At various stages of water tree growth the DC voltage of 4U/sub 0/ (where U/sub 0/ is the rms rated voltage of the cable) was applied for duration of 15 minutes. After the DC exposure, water tree aging continued under AC conditions, and amounted to a total of 296 hours for each sample. The results have shown that there is an increase in the length of water trees grown in samples subjected to a DC voltage compared with the control sample aged, for the same period of time, without the DC exposure.<<ETX>>","PeriodicalId":331058,"journal":{"name":"Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1994-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Growth of water trees exposed to DC voltage\",\"authors\":\"T. Czaszejko\",\"doi\":\"10.1109/ICPADM.1994.414037\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A laboratory experiment was performed in order to determine the influence of a short exposure to DC voltage on the growth of water trees in XLPE cable insulation. The results are of some practical importance, for a DC test voltage is commonly used by utilities when re-commissioning polymeric cable systems which have been previously energised. An accelerated water tree growth from a needle electrode was induced on the surface of samples of cable insulation. At various stages of water tree growth the DC voltage of 4U/sub 0/ (where U/sub 0/ is the rms rated voltage of the cable) was applied for duration of 15 minutes. After the DC exposure, water tree aging continued under AC conditions, and amounted to a total of 296 hours for each sample. The results have shown that there is an increase in the length of water trees grown in samples subjected to a DC voltage compared with the control sample aged, for the same period of time, without the DC exposure.<<ETX>>\",\"PeriodicalId\":331058,\"journal\":{\"name\":\"Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)\",\"volume\":\"69 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICPADM.1994.414037\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPADM.1994.414037","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A laboratory experiment was performed in order to determine the influence of a short exposure to DC voltage on the growth of water trees in XLPE cable insulation. The results are of some practical importance, for a DC test voltage is commonly used by utilities when re-commissioning polymeric cable systems which have been previously energised. An accelerated water tree growth from a needle electrode was induced on the surface of samples of cable insulation. At various stages of water tree growth the DC voltage of 4U/sub 0/ (where U/sub 0/ is the rms rated voltage of the cable) was applied for duration of 15 minutes. After the DC exposure, water tree aging continued under AC conditions, and amounted to a total of 296 hours for each sample. The results have shown that there is an increase in the length of water trees grown in samples subjected to a DC voltage compared with the control sample aged, for the same period of time, without the DC exposure.<>
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