Micromachined Ultrasound Transducers for Imaging of Underground Power Cables

用于地下电力电缆成像的微机械超声换能器

• 批准号: 399065-2010
• 负责人: Thomas, Gabriel
• 金额: $ 5.54万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529299
• 关键词: Micromachined; Ultrasound; Transducers; Imaging; Underground

Power distribution failure is one of the key factors of electrical power interruption and effective preventive maintenance can significantly increase system reliability. Among the distribution failures, one of the major causes is water treeing in the Cross-Linked Polyethylene (XLPE) insulation of underground power cables. Water trees are regarded as being micro-fisures around water droplets within the XLPE insulation and their chemical composition varies depending on the type of soil the underground cable is buried in. What is important to note is that the composition of the water tree is different from the insulation and as such causes a contrast that can permit the detection and imaging of these faults, especially when ultrasound is used as the non destructive testing technique.

配电故障是造成电力中断的关键因素之一，有效的预防性维护可以显着提高系统的可靠性。在配电故障中，地下电力电缆的交联聚乙烯(XLPE)绝缘水树是造成配电故障的主要原因之一。水树被认为是XLPE绝缘内水滴周围的小裂缝，它们的化学成分因埋在地下电缆的土壤类型而异。需要注意的是，水采油树的组成不同于绝缘材料，因此产生了能够检测和成像这些故障的对比度，特别是当使用超声波作为无损检测技术时。