电力工程技术2026，Vol.45Issue(4)：101-111,11.DOI:10.12158/j.2096-3203.2026.04.011
强降雨环境下含零值绝缘子串雷电冲击放电特性影响规律
Characteristics and influence of lightning impulse discharge of zero-value insulator strings in heavy rainfall environment
摘要
Abstract
Heavy rainfall can bridge the sheds of insulators on transmission lines,substations,and converter stations with continuous water columns,leading to electric field distortion.At the same time,the porcelain insulator is easily deteriorated due to its own weight and wind load during long-term operation.The formation of zero-value insulators leads to the occurrence of rain flashover accidents.To investigate the lightning impulse discharge characteristics of porcelain insulator strings containing zero value insulators under heavy rainfall,lightning impulse tests are conducted on XWP2-160 porcelain insulator strings under various zero-value configurations.The results show that,both with and without zero-value insulators,the lightning rain flashover voltage of the porcelain insulator string decreases with the increase of rainfall intensity and rainwater conductivity.The flashover voltage of insulator strings without zero-value insulators is more significantly influenced by rainfall intensity and rainwater conductivity.As the number of zero-value insulators increases,the influence of rainfall intensity and rainwater conductivity on the lightning impulse flashover voltage becomes smaller.When zero-value insulators are located at different positions along the string,the lightning impulse flashover voltage gradually decreases with increasing rainfall intensity and rainwater conductivity,showing a tendency toward saturation.When the zero-value insulator is arranged at the high-voltage end,the rain flashover voltage is obviously greater than that at the middle and grounded end,and the degree of influence by the rainfall intensity and rainwater conductivity is also greater than that at the middle and grounded end.The research results can provide important guidance for the design and configuration of external insulation systems of transmission lines to cope with thunderstorms.关键词
强降雨/瓷绝缘子/零值绝缘子/雷电冲击闪络电压/放电特性/输电线路外绝缘Key words
heavy rain/porcelain insulator/zero value insulator/lightning impulse flashover voltage/discharge characteristics/external insulation of transmission lines分类
信息技术与安全科学引用本文复制引用
董冰冰,乔雨,姚夏..强降雨环境下含零值绝缘子串雷电冲击放电特性影响规律[J].电力工程技术,2026,45(4):101-111,11.基金项目
国家自然科学基金资助项目(52107142) （52107142）
中央高校基本科研业务费专项资金资助(JZ2023HGTB0242) （JZ2023HGTB0242）
