{"title":"Electric field distribution in transformer oil containing an additive using the Kerr-effect technique under various DC stress conditions","authors":"H. Sato, Y. Nonaka, T. Takada","doi":"10.1109/ICDL.1990.202947","DOIUrl":null,"url":null,"abstract":"The electric field distribution profile in transformer insulating oil as a function of time after application of DC step voltage and change of the DC voltage polarity was measured using a highly sensitive advanced Kerr electrooptic technique. The lower limit of the applied electric field intensity was 100 V/cm in insulating oil with an electrode length of 8 cm. Charge distribution as a function of time was calculated from the measured electric field distribution. Mobilities of positive and negative ionic carriers, 0.025 and 0.030 cm/sup 2//Vs, respectively, were determined from the relationship between the saturation time of charge density and applied DC voltage. The relaxation time of accumulated charge near the electrodes after short-circuiting the electrodes was independent of the preapplied DC voltage.<<ETX>>","PeriodicalId":193137,"journal":{"name":"10th International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"28 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1990-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"10th International Conference on Conduction and Breakdown in Dielectric Liquids","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICDL.1990.202947","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
The electric field distribution profile in transformer insulating oil as a function of time after application of DC step voltage and change of the DC voltage polarity was measured using a highly sensitive advanced Kerr electrooptic technique. The lower limit of the applied electric field intensity was 100 V/cm in insulating oil with an electrode length of 8 cm. Charge distribution as a function of time was calculated from the measured electric field distribution. Mobilities of positive and negative ionic carriers, 0.025 and 0.030 cm/sup 2//Vs, respectively, were determined from the relationship between the saturation time of charge density and applied DC voltage. The relaxation time of accumulated charge near the electrodes after short-circuiting the electrodes was independent of the preapplied DC voltage.<>
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