摘要
污秽绝缘子的闪络电压Ｕ和大气压力户之间的关系为Ｕ＝Ｕ。（Ｐ／ｐ０）ｎ，Ｕ０是该污秽绝缘子在标准大气压户。下的闪络电压。作者用固体污层人工污秽试验方法研究了不同形状绝缘子在不同污秽度下以及在不同大气压力下的污闪电压，并研究了在交流和直流电压分别作用下的污闪电压差别。试验结果表明，上述公式中的指数ｎ在交流电压下的数值大于直流电压。对于形状简单的绝缘子ｎ值不受污秽程度影响，对于形状复杂的绝缘子ｎ值受污秽程度的影响。ｎ值变化的原因在于绝缘子伞裙间的电弧桥络现象。
he relationship between the flashover voltage U of the polluted insulator andthe air pressure p is usually expressed by a formula where U0 is the flashovervoltage of the polluted insulator at the standard atmospheric pressure P0 In this paper several types of insulators with different shapes were tested by the artificial solid pollution layermethod at different air pressures and at different pollution degrees under both AC and DCvoltages. The test results showed that the exponent n at above formula was larger under acvoltage than that under DC voltage. For the insulators with simple shape the exponent n isnot influenced by the pollution degree, but for the insulators with complex shape the value nwas effected by the pollution degree. The reason of n changing is the arcbridging phenomenon between sheds or ribs of insulators at different air pressures.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1995年第1期17-24,共8页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
绝缘子
低气压
污闪特性
污闪电压
insulator
pollution
flashover voltage
low air pressure
