标题：Characteristics of Secondary AC Arc Column Motion Near Power Transmission-Line Insulator String
作者：Li, Qingmin; Cong, Haoxi; Sun, Qiuqin; Xing, Jinyuan; Chen, Quan
作者机构：[Li, Qingmin; Xing, Jinyuan] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China.; [Con 更多
通讯作者地址：[Li, QM]North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China.
来源：IEEE TRANSACTIONS ON POWER DELIVERY
关键词：Arc column form; arc plasma; motion characteristics; secondary arc; wind; effect
摘要：Power system secondary ac arcs are plasma discharges in free space with dimensions in meters. The motion of secondary arcs was investigated experimentally using high-speed video on a 1-m scale with a 3-MVA source. The measurements that were evaluated imposed forces, including wind, effects of the arc root, as well as early-stage horizontal and late-stage vertical movement. Partial short circuits of the arc column were observed. The arc column elongated with the de-ionization effect being increased. The column approached a maximum length before the arc extinction. An arc chain model was applied to establish the governing velocity equation. Based on the proposed model, simulations agreed well with the physical experiments.