盐雾对棒——板短空气间隙雷电冲击特性影响研究  

Influence of Salt Spray on the Breakdown Voltage of Rod-plate Short Air Gap Under Lighting Impulses

作　　者：刘云鹏[1] 钟正[1] 李利芬 王博闻[1] 耿江海[1] LIU Yunpeng;ZHONG Zheng;LI Lifen;WANG Bowen;GENG Jianghai(North China Electric Power University,Hebei Baoding 071003,China;Wuhan Branch of China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]华北电力大学,河北保定071003 [2]中国电力科学研究院有限公司武汉分院,武汉430074

出　　处：《高压电器》2018年第9期1-5,11,共6页High Voltage Apparatus

基　　金：国家电网公司科技资助项目(gy71-14-033);国家电网公司总部科技资助项目(高海拔地区盐湖等特殊地理环境下输电线路外绝缘特性研究)~~

摘　　要：目前国内雾霾天气对输电线路外绝缘的影响不容忽视,因此通过盐雾模拟雾霾天气,研究盐雾对短空气间隙雷电冲击击穿电压的影响具有重要实际意义。文中选择击穿电压最低的棒—板空气间隙为模型,分别对5、10、15 cm空气间隙,不同雾水电导率下进行雷电冲击电压击穿试验。结果表明,短空气间隙雷电冲击击穿电压受雾水电导率和空气间隙距离的共同影响,棒—板短空气间隙雷电冲击击穿电压随雾水电导率增大而减小,并且雾水电导率对击穿电压的影响程度随间隙距离增大而减小。通过粒子群算法(particleswarm optimization,PSO)对实验据进行拟合,得到了相应短空气间隙下雷电冲击击穿电压的计算公式。文中结论对如何加强雾霾环境下的输电线路外绝缘强度具有指导意义和重要参考价值。The influence of haze on the insulation of transmission line cannot be ignored. To reveal the influence of salt spray on breakdown voltage of air gap under lightning impulses, the rod-plane air gap model with the lowest breakdown voltage was adopted to conduct the voltage breakdown test under different haze conductivity. The sizes of the short air gaps of the model are 5, 10 and 15 cm, respectively. Results show that the breakdown voltage of the short air gaps is affected by the haze conductivity and the size of the air gap, the breakdown voltage decreases with the increase of haze conductivity, and the influence of the haze conductivity on the breakdown voltage gets weaker as the gap size increases. The particle swarm optimization was used to fit the experimental data, hence the calculation formula of the breakdown voltage under lighting impulses was obtained. This study may provide a reference for the en- hancement of external insulation of transmission line in haze environment.

关 键 词：高电导率雾 棒—板间隙 雷电冲击电压 击穿电压 

分 类 号：TM85[电气工程—高电压与绝缘技术]