...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of energy and power engineering >Weibull Statistics in Dielectric Strength of Oil-impregnated Pressboard under Ramped AC and DC Voltages
【24h】

Weibull Statistics in Dielectric Strength of Oil-impregnated Pressboard under Ramped AC and DC Voltages

机译：交流和直流电压升高下油浸纸板的绝缘强度的威布尔统计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AC and DC breakdown tests were performed on large populations of oil-impregnated pressboard samples. The effect of voltage ramp rate on dielectric strength has been investigated. A statistical analysis of breakdown data was carried out using the Weibull distribution. The 90% confidence intervals of Weibull graphs were calculated. The study shows that dielectric strength and shape parameter change versus ramp rate. The variations are attributed to the size and number of defects. Discharges occur from the oil to the oil-pressboard interface and lead to breakdown. DC dielectric strength is larger than that corresponding to AC voltage. This is ascribed to the dissipated energy difference under the two types of field and the fatigue produced by the alternating voltage. This phenomenon is related to space charge. Under DC stress, dielectric strength is higher under negative polarity. It is assigned to the different quantities of space charge accumulated under the two polarities.
机译：交流和直流击穿测试是对大量浸油的压板样品进行的。已经研究了电压斜率对介电强度的影响。使用威布尔分布对击穿数据进行统计分析。计算了威布尔图的90％置信区间。研究表明，介电强度和形状参数随斜率变化。差异归因于缺陷的大小和数量。机油会从机油排放到机油压力板界面，并导致故障。直流介电强度大于对应的交流电压。这归因于两种场类型下的耗散能量差和交流电压产生的疲劳。这种现象与空间电荷有关。在直流应力下，负极性时的介电强度较高。它被分配给在两种极性下积累的不同数量的空间电荷。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号