A Time-dependent Prediction Model of Rime Accretion on Transmission Line
Transmission line icing is one of the major natural disasters that affect the safe and stable operation of power system.It has great significance to study the influence of atmospheric environmental parameters on the icing process on conductor and to accurately predict the ice quality and shape.In this paper,the time step of ice prediction which directly affects the time cost and accuracy of prediction was taken into account.For the rime accretion problem,the real environmental parameters were re-determined in each step of prediction.The finite volume method(FVM)was used to solve the k-ε turbulence model based on the RNG method to obtain the airflow field.Lagrange method was utilized for calculating the trajectory of droplets on the basis of the airflow field obtained,and then the quality and shape of rime was predicted through the post-processing.The influence of each factor(airflow velocity,air temperature,liquid water content,median droplet volume diameter and diameter of conductor)on the rime accretion on conductor was studied and summarized.In order to validate the rime accretion prediction model in this paper,the natural icing experiment was carried out at the Natural Icing Test Station of Chongqing University at Xuefeng Mountain.The ice quality and ice shape of the experiment were consistent with the prediction results in this paper,which proved that the prediction model was accurate and effective.
Conductor rime accretion optimal time step ice shape ice quality Time-dependent parameter prediction
Fangyi Jiang Xingliang Jiang
College of Electrical Engeneering Chongqing University Chongqing,China
国际会议
重庆
英文
1-7
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）