Pd/Ag coated fiber Bragg grating sensor for hydrogen monitoring in power transformers
Pd/Ag coated fiber Bragg grating sensor for hydrogen monitoring in power transformers
复制标题
用于电力变压器氢监测的 Pd/Ag 涂层光纤布拉格光栅传感器
DOI：
10.1063/1.4918802
复制
发表时间：
2015-04-01
影响因子：
1.6
通讯作者：
Wang, H. B.
中科院分区：
文献类型：
--
作者：
Ma, G. M.;Jiang, J.;Wang, H. B.
与传统的电力变压器在线监测的DGA(溶解气体分析)方法相比，FBG(光纤布拉格栅氢传感器)具有抗电磁场、省时、便于缺陷定位等显著优点。因此，本文提出了一种基于Pd/Ag(钯/银)和聚酰亚胺复合膜的新型FBG氢气传感器，用于测量大型电力变压器中的溶解氢浓度。在Pd/Ag复合涂层的帮助下，表现出了机械强度和感度的增强性能，并用校正直线求解了响应时间和感度随油温的影响。在实验室中分别对特定氢敏元件进行了灵敏度测量和温度标定。实验结果表明，在电力变压器典型运行温度下，其灵敏度高达0.055 pm/(亩L/L)，瞬时响应时间约为0.4h，这证明了通过检测溶解氢浓度来监测电力变压器内部的健康状态是一种潜在的应用。(C)2015 AIP出版有限责任公司。
Compared with conventional DGA (dissolved gas analysis) method for on-line monitoring of power transformers, FBG (fiber Bragg grating) hydrogen sensor represents marked advantages over immunity to electromagnetic field, time-saving, and convenience to defect location. Thus, a novel FBG hydrogen sensor based on Pd/Ag (Palladium/Silver) along with polyimide composite film to measure dissolved hydrogen concentration in large power transformers is proposed in this article. With the help of Pd/Ag composite coating, the enhanced performance on mechanical strength and sensitivity is demonstrated, moreover, the response time and sensitivity influenced by oil temperature are solved by correction lines. Sensitivity measurement and temperature calibration of the specific hydrogen sensor have been done respectively in the lab. And experiment results show a high sensitivity of 0.055 pm/(mu l/l) with instant response time about 0.4 h under the typical operating temperature of power transformers, which proves a potential utilization inside power transformers to monitor the health status by detecting the dissolved hydrogen concentration. (C) 2015 AIP Publishing LLC.