The icing of conductors and ground wires often leads to the disconnection of transmission lines in mountainous icing areas.The use of mature deicing technology for line deicing is one of the effective solutions.Aiming at the problem of safe service of mountain transmission lines in the icing areas,this paper quantitatively analyzes and evaluates the reliability of safe service of mountain transmission lines under threshold deicing mechanism.Using the first-order second moment method with truncated distribution,considering the lowest sag point and suspension point of transmission line,it studies the reliability of mountain transmission line under threshold deicing mechanism by selecting deicing threshold,height difference angle and span as research parameters.The results show that the height difference angle and span are the significant influence parameters of the failure probability of mountain transmission lines in safe service.When setting the deicing threshold of the studied line,it should focus on the values within 10~20 mm,which can take into account the service safety and deicing times.
维普
万方数据