{"title":"Bending behavior of lapped plastic EHV cables","authors":"G. Morgan, A. Muller","doi":"10.1109/ICEI.1980.7470887","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470887","url":null,"abstract":"One of the factors delaying the development of lapped polymeric cables has been their reputed poor bending characteristics. Complementary programs were begun at BNL several years ago to mathematically model the bending of synthetic tape cables and to develop novel plastic tapes designed to have moduli more favorable to bending. A series of bend tests was recently completed to evaluate the bending performance of several tapes developed for use in experimental superconducting cables. The program is discussed and the results of the bend tests are summarized.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128647521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preliminary ageing tests on a superconducting cable dielectric","authors":"A. Pearmain, E. Forsyth, M. Kosaki, R. Thomas","doi":"10.1109/ICEI.1980.7470892","DOIUrl":"https://doi.org/10.1109/ICEI.1980.7470892","url":null,"abstract":"A lifetime of at least 25 years must be established for the commercial acceptance of the superconducting power cable that is under development. Establishment of lifetime requires accelerated testing. Limits to the degree of frequency acceleration are examined and frequency-accelerated ageing tests on a sample of the cable dielectric system are described. The sample was stressed at 10 MV/m with the dielectric impregnated with supercritical helium gas at 8 K and a density of 110 kg/m3 for an equivalent 60 Hz time period of 531 days. During this period the partial discharge inception stress declined from 12.3 MV/m to 7.1 MV/m. Examination of the sample after the test revealed erosion of the vapor-deposited aluminum layer on the screen tapes.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"6 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113974902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Traut, J. Kurt, Francis M. DiPietro, K. P. Roberts
{"title":"Electrical/mechanical evaluation of high voltage dielectrics for OTEC riser cables","authors":"R. Traut, J. Kurt, Francis M. DiPietro, K. P. Roberts","doi":"10.2172/6765542","DOIUrl":"https://doi.org/10.2172/6765542","url":null,"abstract":"This paper describes the unique design and test requirements for the cable dielectrics selected for evaluation for use in Ocean Thermal Energy Conversion plants. Specifically, the methodology of developing the test procedure is defined. The basic cable dielectrics selected for evaluation include taped/oil-impregnated insulation, and extruded solid cross-linked polyethylene insulation. These cables are designed to transmit 100 MW at 138 kV, and will be subjected to installation and operating conditions that are unprecedented for any power cable system. These conditions include ocean depths of 4,000 to 5,000 feet, long vertical suspension, and the motions and forces imparted by the plant and ocean. The developmental test program is designed primarily to determine the weak link in the components of the candidate cable with regard to the ability to successfully withstand the unusual OTEC conditions over a 10 to 30 year lifetime. Two basic areas of concern are the mechanical fatigue of metallic sheaths and strength members, and the electrical/mechanical \"fatigue\" of the dielectric and shielding components. The paper will address the constraints and problems in such testing, and the engineering solutions will also be described. Finally, the scheduled plan for completion of the entire development test plan will be defined.","PeriodicalId":113059,"journal":{"name":"1980 IEEE International Conference on Electrical Insulation","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126238024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}