3D Channel Tortuosity of Long Air Gap Discharge

摘要：

The geometric form of the leader trajectory is an interesting aspect of long air gap discharge research.In this paper, the 3-D discharge channel tortuosity in 3m rodplane gaps is obtained by following steps: Firstly, using two static cameras fixed orthogonally to record the face photo and the side photo of the discharge channel.Secondly, the 3-D discharge channel is reconstructed by employing image recognition technology.Thirdly, the discharge channel tortuosity in two-dimensional space and three-dimensional space are derived respectively, which satisfied the Gaussian distribution law.The statistical results indicate that the channel tortuosity will be conservatively estimated by using a two-dimensional method.Statistical results of the channel tortuosity with three-dimensional method indicate the following conclusions.The angle between the discharge channel segments and the gap axis meets the distribution of rational function and its average value and standard deviation is 23.8°and ±19.0°respectively; the angle between the adjacent channel segments also meets the distribution of rational function, and its average value and standard deviation is 13.3°and ±9.9°.

关键词： three-dimensional characteristics discharge channel rod-plane air gap positive switching impulse

作者: Shanqiang Gu Nianwen Xiang Jiahong Chen Weijiang Chen Shijun Xie Junjia He

作者单位: The State Grid Electric PowerResearch Institute,Wuhan 430074,China. State Grid Corporation of China,Beijing 100031,China. The State Key Laboratory ofAdvanced ElectromagneticEngineering and Technology,Huazhong University of The State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University

会议类型: 国际会议

会议名称: 第七届亚太防雷国际会议

会议地点: 成都

会议语种:英文

页码: 1-4

在线出版日期: 2011-11-01（万方平台首次上网日期，不代表论文的发表时间）