OPEN ACCESS
In an electric power system, the upgrading of the power transformer level and capacity leads to the increase of failure rate and repair time. As a result, the transformer winding temperature is monitored in real-time to give early warning so that effective measures can be carried out to reduce the occurrence of incidents. The internal environment of a transformer is characterized by high voltage, strong electromagnetic interference, narrow space, and strong corrosion, etc. How to detect the transformer state in a stable, accurate and quick manner and precisely predict failures has become the critical technical difficulty requiring urgent solution. Therefore, researchers have been working on the application of sensing technologies in the health monitoring of large-sized equipment. The Fiber Bragg Grating (FBG) sensing technology is a rising interdisciplinary high-tech application. Compared with traditional sensors, a FBG sensor has such advantages as small volume, light weight, implantable structure, no electromagnetic interference and reusability, making it one of the core sensing elements widely applied in the field of equipment health monitoring. Being suitable for long-term monitoring in a severe environment, it is now a great substitute for electric sensors.
Fibre Bragg Grating sensor, power transformer, monitoring system, GaAs material
[1] Reffas A, Idir O, Ziani A, Ameur S, Moulai H, Nacer A, Khelfane I, Rebbouh D. (2016). Combined effect of temperature and electrical discharges on the properties of transformer mineral oils. European Journal of Electrical Engineering 18(1-2): 61-77.
[2] Cataliotti A, Cara DD, Tine G. (2012). Power-line communication in medium-voltage system: Simulation model and on field experimental tests. IEEE Transactions on Power Delivery 27(1): 62-69. http://dx.doi.org/10.1109/TPWRD.2011.2171009
[3] Liu BL, Xu XW. (2017). A power system active power network loss based calculation method on partial priority clustering algorithm. Review of Computer Engineering Studie 4(1): 17-21. http://dx.doi.org/10.18280/rces.040104
[4] Wang FH, Zhou X, Gao P, Xi X. (2015). Improved thermal circuit model of hot spot temperature in oil-immersed transformers based on heat distribution of winding. High Voltage Engineering 41: 895-901. http://dx.doi.org/10.13336/j.1003-6520.hve.2015.03.026
[5] Zhong YC, Wan NF, Xia Y. (2014). Distributed diagnosis algorithm for transformer fault by dissolved gas-in-oil parameters analysis. High Voltage Engineering: 2279-2284. http://dx.doi.org/10.13336/j.1003-6520.hve.2014.08.004
[6] Jiang TS, Li J, Chen WG, Sun CX, Zhao T. (2009). Thermal model for hot spot temperature calculation in oil-immersed transformers. High Voltage Engineering 35(7): 1635-1640.
[7] Gaouda AM, Salama MMA. (2011). DSP wavelet-based tool for monitoring transformer inrush currents and internal faults. IEEE Transactions on Power Delivery 25(3): 1258-1267. http://dx.doi.org/10.1109/TPWRD.2010.2046653
[8] Saleh SA, Rahman MA. (2011). Testing of a wavelet-packet-transform-based differential protection for resistance-grounded three-phase transformers. IEEE Transactions on Industry Applications 46(3): 1109-1117. http://dx.doi.org/10.1109/IAS.2005.1518437
[9] Rao MS, Reddy BE. (2011). Comparative analysis of pattern recognition methods: An overview. Indian Journal of Computer Science & Engineering 2(3): 385-390.
[10] Zhou HQ. (2009). Calculation and design of temperature rise of upper end line section in large transformer winding. Transformer 4: 5-8.
[11] Cao S, Li N, Yu N. (2018). Power electronic transformer control technology based on dsp. Chemical Engineering Transactions 66: 1261-1266. http://dx.doi.org/10.3303/CET1866211
[12] Li JB, Li WH. (1996). Energy method for calculating transformer impedance voltage. Transformer 9: 13-16.
[13] Susa D, Lehtonen M, Nordman H. (2005). Dynamic thermal modelling of ower transformers. IEEE Transactions on Power Delivery 20(1): 197-204. http://dx.doi.org/10.1109/TPWRD.2004.835255
[14] Fan Q. (2018). Multi-target location of infrared image of power equipment. Chemical Engineering Transactions 66: 859-864. http://dx.doi.org/10.3303/CET1866144
[15] Li WP, Zhang ZG. (2009). Analysis on the field of 800kV converter transformer used in HVDC transmission system. Transformer 6: 1-5.