Sponsored bySDT超声解决方案7月25日2022年路易斯特（Louis Castel）审查
The transmission and distribution of electricity include many waypoints, from the power generation facility to eventual points of use.一路上，聚合物绝缘子的作业是在不允许电流通过的情况下支撑和分离电导体。
绝缘子有多种尺寸，形状和材料。欧洲杯足球竞彩使用最广泛的类型之一polymeric insulatorsis composite materials containing silicone rubber. They are picked based on how they withstand a range of harsh environments, including hot desert climates as well as variable temperature regions such as those found in Europe as well as the northern United States and Canada.
图片来源：SDT超声解决方案
尽管气候导致聚合物绝缘子的降解，但它并不是唯一在其缩短寿命中起作用的因素。它们的早期灭亡也有些归因于电流的部分排放。
部分放电（PD）是绝缘系统中的局部电气放电或火花，并不能完全弥合一对导电电极之间的间隙。它可以在绝缘系统中的任何时刻发生，因为电场强度大于绝缘材料的分解强度。
PD is a reaction that takes place at an atomic level. At locations of high stress, the movement of electrons ionizes the air molecules. Ionization splits the oxygen molecule to create nitrous oxide and ozone, which, alone in their normal states, are considered harmless. But if combined with water vapor, they will become corrosive.
Partial discharge is something that many of us may have witnessed firsthand; you can often smell ozone in a substation, for example.
聚合物绝缘子的设计可承受刺激性的气候和温度的巨大波动。即使在某种程度上，它们也可以承受PD的存在。但是，每个资产都有其破裂点，PD的腐蚀性最终也导致聚合物绝缘子的降解。因此，频繁的状况监测对于评估其剩余寿命至关重要。
红外热成像和超声are both technologies that have become synonymous with inspections and电气资产的条件监控。Infrared is highly regarded for its ability to see heat traces at safe distances, while ultrasound is preferred for its ability to hear partial discharge in the form of arcing, surface tracking, and corona.
New technology in the form of Acoustic Imaging Cameras is gaining favor because it can spot PD anomalies in any light condition from safe distances.Sonavu™是这种技术的一个例子。
Sonavu™是一款声学成像摄像头，可以从五十米或更高的距离中听到超声源，然后在全彩视频或图像上可视化声音。
配备了112个数字MEMS传感器，操作员可以在通过异性电路和蓝牙耳机聆听时看到超声源。视频和图像存储在内存中，并将其转移到PC中以进行方便的报告生成。
A diagnostic report was recently conducted by Craig Casler, principle technical inspector with Absolute Infrared Inspection Services in Erie, Pennsylvania on a substation. Casler was called in to inspect a range of different assets within the substation, such as transmission and distribution lines fitted with polymer insulators.
他的技术包括红外摄像机和超声检测系统。与他的检查Sonavu™声学摄像机允许安全揭示从地面退化的脱位。
图片来源：SDT超声解决方案
聚合物绝缘子，例如本文中所示的绝缘子，通常在电力传输和分布世界中使用。卡斯勒迅速将其视为部分排放的来源，并使用他的Sonavu™确认了PD的来源。
尽管是一名经验丰富的电气检查员，并且在使用超声和红外线方面进行了良好的训练，但这是克雷格（Craig）第二次使用他的Sonavu™进行现场检查。卡斯勒（Casler）在仅接受一小时的虚拟在线培训后的成功表明现代技术和短暂的学习曲线的使用便利。
图片来源：SDT超声解决方案
在Casler的客户报告中，他建议采取纠正措施以清洁或完全替代受影响的组件的形式。
It is known that ultrasound can detect the presence of PD at very early stages. Since the PD was not present during previous inspections and given the routine nature of the inspections carried out on this substation, it was concluded that the defect was in its early stage, and the necessary corrective action was not urgent. There was time to plan the repair.
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在许多情况下，检查员进行工作，从未意识到他们创造的好处。但是，在这种情况下，克雷格的客户分享了他们的发现和赞赏。在安排的中断以替换聚合物绝缘体后，客户拍摄了这张照片并分享了它。
仔细检查表明，聚合物涂层如何由于电晕效应而被腐蚀。在查看下图时，很明显，从电缆休息的位置向下追踪的线是破坏性表面跟踪的结果。
图片来源：SDT超声解决方案
通常，像许多资产一样，运营是唯一采用的可靠性策略。当电晕和其他形式的部分排放从常规状况监测中不受控制或排除，确实会发生灾难。
该图像中绝缘子周围的燃烧是由与先前所示的相同的PD活性引起的。唯一的区别在于它未被发现。维护是作为对紧急损害的反应，并对电源线的附带损坏。更糟糕的是，大火损坏了一个钥匙变压器，并导致了整个植物的关闭。
In addition to costing millions of dollars in downtime and repairs, unreliable electric power systems have the potential to maim and kill. Reliability leadership must focus on the preservation of human as well as physical assets.
Ultrasound represents an easy, safe, reliable technology for assessing the presence of risk and the need for maintenance intervention. It is an inexpensive technology with a short competency curve.
可以找到原始文章这里。
This information has been sourced, reviewed and adapted from materials provided by SDT Ultrasound Solutions.
有关此消息来源的更多信息，请访问SDT超声解决方案。