• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IEEE International Conference on Solid Dielectrics >Assessment of space charge behavior of oil-cellulose insulation systems by means of the PEA method
【24h】

Assessment of space charge behavior of oil-cellulose insulation systems by means of the PEA method

机译：豌豆法评估油纤维素绝缘系统的空间充电行为

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Despite recent advancements in material technology, oil-cellulose insulation systems in form of so called Trans-formerboard combined with paper and mineral oil are still one of the backbones of high voltage technology. This insulation system is widely used in the high voltage industry, especially in high voltage transformers for AC and HVDC applications, e.g. converter transformers. The space charge behaviour of Transformerboard has rarely been investigated, causing the presumption oil-cellulose insulation systems would not collect significant amounts of space charges. This exploratory work investigated oil-cellulose insulation in new condition and at different aging stages. Main objective of this series of measurements was to investigate the influence of isothermal aging on the charge behaviour of Transformerboard. To achieve this, a number of oil-impregnated samples were measured with the pulsed electro-acoustic (PEA) method. The non-destructive PEA method has the advantage of enabling multiple measurements on the same sample. The surface of the Transformerboard samples has been grinded to eliminate possible surface effects here. These samples had a thickness of 1 mm and they have been impregnated with mineral insulating oil. Space charge profiles were recorded during polarisation and depolarisation at 20°C and 60°C. New samples were recorded first and compared to samples, which were aged for 11 weeks at 135°C. A preliminary explanation for the charge mechanisms involved is given in the analysis.
机译：尽管最近的材料技术进步，但由于纸和矿物油组合的所谓的跨前板形式的油脂绝缘系统仍然是高压技术的骨干。该绝缘系统广泛用于高压工业，特别是在AC和HVDC应用中的高压变压器中，例如，转换器变压器。变压器板的空间充电行为很少已经研究过，导致推定油纤维素绝缘系统不会收集大量空间收费。该探索性工作研究了新病症和不同老化阶段的油脂绝缘。这一系列测量的主要目的是研究等温老化对变压纸板充电行为的影响。为此，用脉冲电声（豌豆）法测量许多油浸样品。非破坏性豌豆方法具有在同一样本上实现多次测量的优点。变压器板样品的表面已经研磨以消除此处可能的表面效果。这些样品的厚度为1mm，它们已浸渍矿物绝缘油。在20°C和60℃的偏振和去极化期间记录空间电荷型材。首先记录新的样品并与样品进行比较，在135℃下在135℃下老化11周。在分析中给出了对所涉及的充电机制的初步说明。

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