Fiber Bragg Grating Sensor for Hydrogen Detection in Power Transformers
Fiber Bragg Grating Sensor for Hydrogen Detection in Power Transformers
复制标题
用于电力变压器中氢气检测的光纤布拉格光栅传感器
DOI：
10.1109/tdei.2013.004381
复制
发表时间：
2014-02-01
影响因子：
3.1
通讯作者：
Luo, Ying-Ting
中科院分区：
文献类型：
--
作者：
Ma, Guo-Ming;Li, Cheng-Rong;Luo, Ying-Ting
设计了一种基于光纤布拉格光栅(FBG)传感技术的新型氢气传感器。传感器可以安装在变压器内部。它具有故障检测和定位速度快、抗电磁干扰、准分布测量和实时监测等优点。所提出的FBG氢传感器的原理是基于吸收氢的钯膜的物理性质的变化。采用磁控溅射方法制备了厚的钯层，以获得高灵敏度。同时，在粘结层中加入聚酰亚胺，提高了传感器的可靠性。局部放电实验表明，FBG氢气传感器的波长漂移与变压器油中溶解氢气的浓度呈线性关系。它几乎不受其他因素的干扰。在80℃的油中进行的氢敏实验表明，从室温到电力变压器的运行温度，传感器的灵敏度随着温度的变化而保持不变。因此，所提出的传感器可以在电力变压器的运行温度下正常工作。
A novel hydrogen sensor is designed on the basis of Fiber Bragg grating (FBG) sensing technique. The sensor can be arranged inside the transformer. It has several advantages, such as fast fault detection and location, immunity to electromagnetic interference, quasi-distribution measurement and real-time monitoring. The principle of the proposed FBG hydrogen sensor is based on changes of the physical properties of palladium films which absorb hydrogen. A thick palladium layer prepared by magnetron sputtering is used to achieve high sensitivity. Meanwhile, polyimide is added into the adhesive layer to improve the reliability of the sensor. Partial discharge experiments demonstrated that the wavelength shift of the FBG hydrogen sensor varies linearly with the concentration of hydrogen dissolved in the transformer oil. It is hardly disturbed by other factors. The hydrogen sensing experiment in oil at a temperature of 80 degrees C revealed that the sensitivity of the sensor remains same as the temperature varies, ranging from room temperature to operating temperature of the power transformer. Thus, the proposed sensor can work properly under the operating temperature of power transformers.