Abstract:Online monitoring systems for transmission lines are crucial for maintaining the stable operation of power systems. In this paper, traditional online icing-monitoring techniques for transmission lines were introduced, and the application of optical fiber sensors in this field was comprehensively summarized. Based on an analysis of the monitoring principles of quasi-distributed and distributed optical fiber sensing, the unique advantages of optical fiber sensing systems over traditional electronic sensors were explored. Additionally, a series of current issues such as limited monitoring range and high monitoring costs associated with optical fiber sensing systems were revealed. Therefore, we provided some potential research directions with respect to multidimensional data fusion and artificial intelligence algorithm correction technology for conductor icing-monitoring using optical fiber sensors. The purpose of this paper is to accelerate the development of online monitoring for icing transmission lines and the application of optical fiber sensing systems.