{"title":"The influence of a dc bias on streamers produced by step voltages in transformer oil with and without insulating surfaces","authors":"S. Rzad, J. Devins, R. Schwabe","doi":"10.1109/EIC.1982.7464483","DOIUrl":null,"url":null,"abstract":"Using shadowgraphic techniques in conjunction with an Imacon camera, measurements of streamer velocities and minimum voltage required for streamer propagation (MVP) have been made with and without dc superimposed on voltage steps (1.2 µs rise time). This has been done in point-plane geometries and semi-uniform fields in a transformer oil alone as well as with pressboard barriers. Velocities and MVP have also been measured for streamers propagating on the surface between cylindrical electrodes perpendicular to insulating sheets having a ground plane on the opposite side. Again the influence of superimposed dc was assessed. The solid materials used were polymethylmethacrylate and pressboard. Measurements with the latter material were made using an optical multichannel analyzer to follow the light emission from the propagating streamer.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"94 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1982-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1982 IEEE International Conference on Electrical Insulation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EIC.1982.7464483","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Using shadowgraphic techniques in conjunction with an Imacon camera, measurements of streamer velocities and minimum voltage required for streamer propagation (MVP) have been made with and without dc superimposed on voltage steps (1.2 µs rise time). This has been done in point-plane geometries and semi-uniform fields in a transformer oil alone as well as with pressboard barriers. Velocities and MVP have also been measured for streamers propagating on the surface between cylindrical electrodes perpendicular to insulating sheets having a ground plane on the opposite side. Again the influence of superimposed dc was assessed. The solid materials used were polymethylmethacrylate and pressboard. Measurements with the latter material were made using an optical multichannel analyzer to follow the light emission from the propagating streamer.