摘要
针对近年来我国输电线路频繁出现风偏闪络事故,分析认为暴雨是造成输电线路风偏闪络的原因之一。通过模拟降雨试验研究降雨强度、雨水电阻率、环境温度对棒-板(棒-棒)空气间隙交流放电特性的影响。试验结果表明:降雨强度、雨水电阻率均使棒-板(棒-棒)空气间隙交流放电电压降低,其中降雨强度对棒-板空气间隙交流放电电压的影响最明显;降雨强度I=2～14mm/min时,棒-板间隙距离d=0.4、0.6、0.7m的交流放电电压最大降低幅度分别为6.73%、6.54%、6.02%,而棒-棒间隙的最大降低幅度分别为2.66%、3.22%、3.07%;降雨强度对棒-板交流放电电压影响大,对棒-棒影响小;暴雨情况下环境温度的升高使棒-板空气间隙交流放电电压升高,其最大变化幅度为7.03%。
As flashover accidents because of strong wind thought to be one cause of flasbover between tower and and storm frequently appear in our country, storms are conducting wires in transmission lines. The influence of rainfall intensity,rainwater resistivity and air temperature on AC discharge characteristic of rod-plane（rod-rod） air gap is mainly investigated. The experimental result shows that, rainfall intensity and rainwater resistivity can reduce AC discharge voltage of rod-plane（rod-rod） air gap, and rainfall intensity has the most obvious effect on AC discharge voltage of rod-plane air gap; when rainfall intensity ranges from 2 to 14 mm/min, AC discharge voltage maximum reduction of 0. 4,0. 6,0. 7 m rod-plane gap is respectively 6. 73%, 6. 54%,6. 02%, and maximum reduction of rod-rod gap is respectively 2.66%,3.22 %,3.07%;the influence of rainfall intensity on AC discharge voltage of rod-plane is bigger than rod-rod＇s; AC discharge voltage of rod-plane air gap increases with the increase of air temperature, and the maximum amplitude is 7.03 %.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第1期52-58,共7页
Journal of Chongqing University
基金
国家重点基础研究计划资助项目(2009CB724503)
关键词
降雨强度
雨水电阻率
环境温度
电极结构
交流放电电压
rainfall intensity
rainwater resistivity
air temperature
pole structure
AC discharge voltage
