Abstract
A distributed online fiber sensing system based on the phase-sensitive optical time domain reflectometer (Φ-OTDR) enhanced by the drawing tower fiber Bragg grating (FBG) array is presented and investigated experimentally for monitoring the galloping of overhead transmission lines. The chirped FBG array enhanced Φ-OTDR sensing system can be used to measure the galloping behavior of the overhead transmission lines (optical phase conductor or optical power ground wire), which are helpful for monitoring the frequency response characteristics of the ice-induced galloping, evaluating the motion tendencies of these cables, and avoiding the risk of flashover during galloping. The feasibility of the proposed online monitoring system is demonstrated through a series of experiments at the Special Optical Fiber Cable Laboratory of State Grid Corporation of China (Beijing, China). Results show that the proposed system is effective and reliable for the monitoring of galloping shape and characteristic frequency, which can predict the trend of destructive vibration behavior and avoid the occurrence of cable breaking and tower toppling accidents, and these features are essential for the safety operation in smart grids.
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Acknowledgment
This research is supported by the National Natural Science Foundation of China (Grant Nos. 61775173, 61975157, and 52071245) and the Science and Technology Project of State Grid Corporation of China (Research on the basic technology of the next generation intelligent optical cable based on grating array fiber sensor, Grant No. 5442XX190009).
Our acknowledgments go to Eng. Ke Song and Eng. Xin Xiong from Wuhan FLOES Co., Ltd. For their precious help with the technical support of the hardware and software. The authors would also like to acknowledge Dr. Xi Chen and Dr. Yandong Pang in the National Engineering Laboratory for Fiber Optic Sensing Technology for their valuable discussions on paper writing.
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Yan, Q., Zhou, C., Feng, X. et al. Galloping Vibration Monitoring of Overhead Transmission Lines by Chirped FBG Array. Photonic Sens 12, 220310 (2022). https://doi.org/10.1007/s13320-021-0651-4
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DOI: https://doi.org/10.1007/s13320-021-0651-4