Journal ArticleDOI
Fiber bragg grating sensor for hydrogen detection in power transformers
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TLDR
In this paper, a novel hydrogen sensor is designed on the basis of Fiber Bragg grating (FBG) sensing technique, which can be arranged inside the transformer and has several advantages, such as fast fault detection and location, immunity to electromagnetic interference, quasi-distribution measurement and real-time monitoring.Abstract:
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°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.read more
Citations
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Journal ArticleDOI
Recent advancements in optical fiber hydrogen sensors
TL;DR: In this paper, a review of optical fiber hydrogen sensors based on palladium (Pd) and tungsten oxide (WO3) thin films is presented, with specific focus on the measurement methods, probe structures, and sensing properties of different sensors.
Journal ArticleDOI
Distributed Partial Discharge Detection in a Power Transformer Based on Phase-Shifted FBG
TL;DR: In this article, a distributed power transformer partial discharge detection system based on phase-shifted fiber Bragg gratings (PS-FBG) is proposed, which can be installed inside the power transformer, which takes the advantage of the optical fiber status as an insulator.
Journal ArticleDOI
Review on fiber-optic sensing in health monitoring of power grids
TL;DR: Key fiber-optic sensing technologies, including fiber Bragg gratings, fiber- optic interferometers, optical time domain reflectometries, and their applications in three main parts of power grids, transformers, power towers, and overhead transmission lines, during the past 20 years are reviewed.
Journal ArticleDOI
Fiber Bragg Gratings Hydrogen Sensor for Monitoring the Degradation of Transformer Oil
Mohd Raffi Samsudin,Y. G. Shee,Faisal Rafiq Mahamd Adikan,Bushroa Abdul Razak,Mahidzal Dahari +4 more
TL;DR: In this paper, two fiber Bragg gratings (FBGs) sensors, which are based on different palladium (Pd) coatings ratios, was proposed to detect the dissolved hydrogen gas content in transformer oil.
Journal ArticleDOI
Optical Fiber Grating Hydrogen Sensors: A Review.
TL;DR: Their configurations and sensing performances proposed by different groups worldwide are reviewed, compared and discussed in this paper and the challenges for fiber grating hydrogen sensors are addressed.
References
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Journal ArticleDOI
Fiber Bragg grating technology fundamentals and overview
K.O. Hill,G. Meltz +1 more
TL;DR: Fiber Bragg grating (FBG) technology has been extensively studied in the literature as mentioned in this paper, where the basic techniques for fiber grating fabrication, their characteristics, and the fundamental properties of fiber gratings are described.
Journal ArticleDOI
Hydrogen Sensors - A review
TL;DR: There are an immense number of sensors reported in the literature for hydrogen detection and in this article these sensors are classified into eight different operating principles, such as measuring range, sensitivity, selectivity and response time.
Journal ArticleDOI
A review of faults detectable by gas-in-oil analysis in transformers
TL;DR: In this article, the authors present a more user-friendly graphical form of the IEC TC10 databases of DGA results corresponding to faults identified by visual inspection of faulty transformers in service.
Journal ArticleDOI
The Palladium-Hydrogen System
Ted B. Flanagan,W. A. Oates +1 more
TL;DR: In this paper, a review of the properties of the palladium-hydrogen system is presented, focusing on the differences between the three isotopes in the Pd-D system, the deuterium system, and the tritium system.
Journal ArticleDOI
Partial discharge monitoring of power transformers using UHF sensors. Part I: sensors and signal interpretation
TL;DR: In this article, the propagation velocity matrix (PVM) and propagation time matrix (PTM) were introduced to detect partial discharge (PD) in power transformers, which can be used to index a database of physical descriptions of the transformer that could provide additional information to assist with diagnosis.