Sulfur Hexafluoride-Filled Extrinsic Fabry-Perot Interferometric Fiber-Optic Sensors for Partial Discharge Detection in Transformers
Sulfur Hexafluoride-Filled Extrinsic Fabry-Perot Interferometric Fiber-Optic Sensors for Partial Discharge Detection in Transformers
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DOI：
10.1109/lpt.2008.928533
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发表时间：
2008-09-01
影响因子：
2.6
通讯作者：
Wang, Anbo
中科院分区：
文献类型：
--
作者：
Dong, Bo;Han, Ming;Wang, Anbo
本文介绍了一种用于电力Transformer局部放电在线检测的侧孔光纤非本征法布里-珀罗干涉（EFPI）传感器。法布里-珀罗腔是由一个抛光的薄膜片和一个劈开的侧孔光纤热熔在熔融石英套圈上形成的。首先对腔体抽真空，然后通过纤维侧孔用300 kPa SF6充气，以增加其对电应力的抵抗力。实验结果表明，该传感器在Transformer油中能承受10 kV/mm（交流均方根值）以上的电应力，是传统充气式EFPI传感器的3倍。
This letter presents a side-hole fiber-based extrinsic Fabry-Perot interferometric (EFPI) sensor whose cavity was filled with sulfur hexafluoride (SF6) for in situ power transformer partial discharge detection. The Fabry-Perot cavity was formed by a polished thin diaphragm and a cleaved side-hole fiber that were thermally fused onto a fused silica ferrule. The cavity was first vacuumed and then inflated with 300-kPa SF6 through the fiber side holes to increase its resistance to electric stress. Experimental results show that the sensor filled with SF6 was able to withstand electric stress of at least 10 kV/mm (ac root-mean-square value) in transformer oil, three times larger than that of a traditional air-filled EFPI sensor.