中国电机工程学报Issue(31)：177-184,8.
操作冲击下正极性长间隙放电物理仿真模型
A Physical Model to Simulate Long Air Gap Discharge at Positive Switching Impulse Voltage
摘要
Abstract
Researches on the physical model of long air gap discharge under positive impulse are of great importance for the well design of the ultra-high voltage external insulation. In this paper, based on the mechanism of the positive spark in long air gaps, a physical model including the process of the first corona initiation and the streamer development, leader inception, the streamer-leader system propagation and final jump was proposed. The statistical delay of the first corona inception and the random behavior of the leader advancement were taken into account in the proposed model. Moreover, a commercial finite element soft was applied to compute the background potential distributions for the all kinds of typical configurations. The model was validated with experimental measures and a good agreement was obtained. The discharge characteristics of conductor-tower window air gap under switching impulse voltage were simulated by using the proposed model in this paper. It was concluded that the 50%breakdown voltage for the conductor-tower window configuration is between the rod-plane’s and the rod-rod’s, and the wave time front has a relatively strong influence on the 50% breakdown voltage, which presents a “U” like curve. Furthermore, 50% breakdown voltage is slightly affected by the parameter of the tower window width, and the 50%breakdown voltage appears high as the tower window width becomes narrow.关键词
正极性放电/长空气间隙/物理过程/仿真模型/导线-塔窗间隙Key words
positive discharge/long air gap/physical process/simulation model/conductor-tower window gap分类
信息技术与安全科学引用本文复制引用
谢耀恒,贺恒鑫,陈维江,何俊佳..操作冲击下正极性长间隙放电物理仿真模型[J].中国电机工程学报,2013,(31):177-184,8.基金项目
国家重点基础研究发展计划项目(973项目)(2011CB209403)。The National Basic Research Program of China(973 Program)(2011CB209403) （973项目）
