Dr. Naiqiang Mao Profile

Dr. Naiqiang Mao

at North China Electric Power Univ

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Proceedings Article | 23 April 2017 Paper

High sensitive FBG load cell for icing of overhead transmission lines

Naiqiang Mao, Guoming Ma, Chengrong Li, Yabo Li, Cheng Shi, Yue Du

Proceedings Volume 10323, 1032359 (2017) https://doi.org/10.1117/12.2267470

KEYWORDS: Lithium, Atmospheric modeling, Optical fibers, Composites, Fiber Bragg gratings, Sensors, Coating, Temperature metrology, Electromagnetic interference, Power supplies

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Heavy ice coating of overhead transmission lines created the serious threat on the safe operation of power grid. The measurement of conductor icing had been an effective and reliable methods to prevent potential risks, such as conductor breakage, insulator flashover and tower collapse. Because of the advantages of immunity to electromagnetic interference and no demand for power supply in site, the optical load cell has been widely applied in monitoring the ice coating of overhead transmission lines. In this paper, we have adopted the shearing structure with additional grooves as elastic element of load cell to detect the eccentric load. Then, two welding package fiber Bragg gratings (FBGs) were mounted onto the grooves of elastic element with a direction deviation of 90° to eliminate temperature effects on strain measurement without extra FBG. After that, to avoid the occurrence of load cell breakage in heavy load measurement, the protection part has been proposed and added to the elastic element. The results of tension experiments indicate that the resolution of the load cell is 7.78 N in the conventional measuring range (0–10 kN). And in addition, the load cell proposed in this paper also has a good performance in actual experiment in which the load and temperature change simultaneously.

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