基于分布式光纤传感的输电线路覆冰预警研究

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中图分类号：TM726.3 文献标志码：A 文章编号：1008-0562（2025）04-0481-07

Research on icing warning of transmission lines based on distributed fiber optic sensing

WANGShuai，XUQinyun，LIN Shenghai

（CollgeofInformation Technology，Qingdao UniversityofScienceand Technology，Qingdao 2660oo，China）

Abstract：To achievequantitative monitoringof the icing stateon transmision lines，the theoretical relationship between Brillouin frequency shift and icing thickness was derived through theoretical modeling and simulation experiments based on the Brillouin scattering principle and mechanical analysis of suspended cables.The accuracy of this relationship was experimentally verified.The results indicate a monotonic increasing relationship between icing thicknessand Brilouin frequency shift. Under experimental conditions，the measurement error for icing thickness was 12.48% ，and the strain threshold range for icing warnings was 1.5×10-3ε～2.0×10-3ε Direct observation of transmisson line strain values can simplify the icing warning process.The research conclusions provide an effective reference for applying distributed optical fiber sensing technology to icing monitoring in transmission lines.

Keywords：transmission line;distributed fiberoptic sensing;Brilouin optical time-domain reflectometer;optical fiber strain; icing warning; Brillouin frequency shift; quantitative monitoring

0引言

输电线路是电力传输网络的重要组成部分，覆冰会导致线路机械和电气性能下降，引起线路跳闸、断线、倒塔等事故[。（剩余10008字）