Review on Foreign Object Intrusion Detection and Hanging Foreign Object Removal Methods for Overhead Contact Line
As the operating miles of high-speed railway increase,incidents of foreign object intrusion are gradually grow-ing,which have become one of the main factors affecting the safety performance of high-speed railways.The research is insufficient in terms of intrusion detection and hanging foreign object removal methods with respect to overhead contact line,while similar work on power transmission lines is considerably fruitful.Therefore,this paper provided a detailed re-view of existing research on intrusion detection technologies,from the perspectives of detection principles,detection methods and their applications in railway system,with a focus on analyzing the applicable scenarios,advantages and dis-advantages of different methods.Drawing on the works on hanging foreign body removal technologies in power systems,this paper investigated the principles and characteristics of hanging foreign body removal technologies,as well as the possibilities and limitations of their applications in overhead contact line.Combined with catenary characteristics and op-eration and maintenance requirements,the development direction of foreign object detection and removal technologies for overhead contact line was discussed from the three aspects of long-distance real-time detection,long-distance rapid re-moval,and miniaturization and light-weighting of detection and removal devices.