摘要
由人工污秽试验得出绝缘子污闪电压和海拔的关系及反映气压影响污闪电压程度的下降指数n后 ,用爬电比距法算出不同海拔、不同污秽等级下线路绝缘子串长及支柱绝缘子泄漏距离并用污耐受法校核 ,结果表明随海拔升高或气压降低 。
The insulator selection is one of the key problems faced by the 110 kV transmission line of Qinghai-Tibet railway. By using the artificial contamination test, not only the relationship between pollution flashover voltage and altitude, but also the decline exponent, which represents the impact degree that the altitude influence on the pollution voltage, are found out. Based on the experiment results, the length of suspension insulators and the leakage distant of the post insulators are calculated by the method of creepage distance rate under different altitude and different pollution level. The results show that the length of the suspension insulators and the leakage distant of the post insulators increase with the decrease of the air pressure, and the increasing degrees depend on the shape of insulators somehow.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第9期1-2,16,共3页
High Voltage Engineering
基金
国家自然科学基金资助项目 ( 90 2 10 0 3 0 )
关键词
绝缘子
高海拔
污闪电压
人工污秽试验
insulator high altitude pollution flashover voltage artificial contamination test
