首页|The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire-cylinder gap
The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire-cylinder gap
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The corona discharge from transmission lines in high-altitude areas is more severe than at lower altitudes.The radio interference caused thereby is a key factor to be considered when designing transmission lines.To study the influence of altitude on negative corona characteristics,an experimental platform comprising a movable small corona cage was established:experiments were conducted at four altitudes in the range of 1120-4320 m,and data on the corona current pulse and radio interference level of 0.8-mm diameter fine copper wire under different negative voltages were collected.The experimental results show that the average amplitude,repetition frequency and average current of the corona current pulse increase with increasing altitude.The dispersion of pulse amplitude increases with increase in altitude,while the randomness of the pulse interval decreases continuously.Taking the average current as an intermediate variable,the relationship between radio interference level and altitude is obtained.The result of this research has some significance for understanding the corona discharge characteristics of ultra-high-voltage lines.
altitudenegative coronacorona current pulseradio interference level
何旺龄、魏宏宇、张胤禄、刘永聪、刘云鹏、万保权、周阳、王延召、干喆渊
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Hebe Key Laboratory of Green and Efficient New Electrical Materials and Equipment,North China Electric Power University,Baoding 071000,People's Republic of China
State Grid Suzhou Power Supply Company,Suzhou 215000,People's Republic of China
State Key Laboratory of Power Grid Environmental Protection(China Electric Power Research Institute),Wuhan 430000,People's Republic of China
Science and Technology Project of State Grid Corporation of China
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