Dynamic development model for long gap discharge streamer-leader system based on fractal theory  

作　　者：Jianghai GENG Quansheng WANG Xiaomin LIU Ping WANG Fangcheng LYU Yujian DING 耿江海;王权圣;刘晓敏;王平;律方成;丁玉剑(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,People’s Republic of China;China Electric Power Research Institute,Beijing 100192,People’s Republic of China)

机构地区：[1]Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,People’s Republic of China [2]China Electric Power Research Institute,Beijing 100192,People’s Republic of China

出　　处：《Plasma Science and Technology》2022年第9期68-76,共9页等离子体科学和技术（英文版）

基　　金：supported by the Natural Science Foundation of Hebei Province(No.E2021502025)。

摘　　要：Establishing a long air gap discharge model considering the streamer-leader transition and randomness of the discharge path is of great signiflcance to improve the accuracy of discharge characteristic prediction and optimize external insulation design.Based on fractal theory and thermal ionization theory of streamer-leader transition,this work establishes a dynamic development model for the long air gap discharge streamer-leader system,which includes streamer inception,streamer development,leader inception,development of streamer-leader system and flnal jump.The positive discharge process of a 3 m rod plate is simulated to obtain the fractal distribution of the discharge path and the law of leader development for comparison with the discharge test results.The results show that the simulation model is similar to test results in the development characteristics of leader path distribution,each stage time and leader velocity.Finally,a simulation calculation of a 50%breakdown voltage of the rod-plate gap and ball-plate gap is carried out,with results fairly consistent with test data,proving the effectiveness and practicality of the model.

关 键 词：long air gap fractal theory thermal ionization streamer-leader system simulation model 

分 类 号：TM721.1[电气工程—电力系统及自动化]