期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
挤包高压直流电缆的质量控制:采用低频耐压试验检测电缆的关键缺陷(英文)
1
作者 Erling Ildstad Frank Mauseth +1 位作者 Mildrid Selsjord rolf hegerberg 《高电压技术》 EI CAS CSCD 北大核心 2011年第11期2664-2671,共8页
The main purpose of the work presented here is to evaluate different methods for quality control of polymeric insulated HVDC cables.The insight gained can be used to evaluate proposed test methods for quality assuranc... The main purpose of the work presented here is to evaluate different methods for quality control of polymeric insulated HVDC cables.The insight gained can be used to evaluate proposed test methods for quality assurance of long lengths of polymer insulated power cables.Laboratory experiments were performed using both Rogowski shaped test objects and model cables,insulated with XLPE containing imbedded spherically shaped particles.Tests were performed by stressing the test object with AC(50 Hz),VLF(0.1 Hz) and DC voltages and measuring time to breakdown at the different voltages.The slope of the voltage-time curve for 0.1 and 50 Hz were found to be parallel showing higher breakdown strength for 0.1 Hz than 50 Hz.The number of periods to breakdown is somewhat higher for 0.1 Hz than for 50 Hz.The breakdown strength for DC was much higher than for both AC 50 Hz and 0.1 Hz.The results indicate that the VLF test voltage needs to be 2 to 3 times higher than at 50 Hz power frequency in order to eliminate the same defects within a comparable time. 展开更多
关键词 HVDC VLF power cables quality control test methods extruded insulation
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部