中国电机工程学报Issue(36)：6530-6535,6.DOI:10.13334/j.0258-8013.pcsee.2014.36.020
长空气间隙负极性操作冲击放电特性研究（III）-统计特性
Research on Typical Long Air Gaps With Negative Switching Impulses(III)-Statistical Character
摘要
Abstract
There are statistical parameters in long air gap discharge. Mathematical statistics and finite element simulation were both employed to research deeply on the discharge characteristics. Statistical results indicate that there’s a slightly influence of grounding rod height on the 50% discharge voltage of rod-rod air gaps; breakdown time is almost higher than the wave front time with 20/2500μs switching impulse and it is lower than the wave front time with 80/2500μs; the distribution of discharge voltage in 10m rod-plane gaps obeys the normal distribution; and the V-t characteristics of rod–rod gaps is lower than that of rod-plane. Calculation results indicate that nonuniform coefficient of electric field increases with increasing gap distance; the ratio of gap distance and nonuniform coefficient also increases with the gap distance but tends to level off, indicating a saturated discharge voltage with gap distance. The work conducted in this paper can provide preference to the insulation coordination designation of UHV transmission lines.关键词
长空气间隙/下电极高度/放电电压/假设检验/不均匀系数Key words
longair gaps/grounding rod height/discharge voltage/hypothesis testing/nonuniform coefficient分类
信息技术与安全科学引用本文复制引用
王羽,安韵竹,习山,蓝磊,戴敏,李志军,戴润东,叶奇明..长空气间隙负极性操作冲击放电特性研究（III）-统计特性[J].中国电机工程学报,2014,(36):6530-6535,6.基金项目
中国博士后科学基金(2014M560624)。China Postdoctoral Science Foundation(2014M560624) （2014M560624）
