高电压技术2013，Vol.39Issue(6)：1441-1446,6.DOI:10.3969/j.issn.1003-6520.2013.06.022
高海拔地区典型长空气间隙的操作冲击放电特性和海拔校正
Switching Impulse Discharge Characteristics and Altitude Corrections for Typical Long Air Gaps at High Altitude Areas
摘要
Abstract
Studying the discharge characteristics of rod-plane and rod-rod gaps and their altitude correction can not only provide references for choosing air gap distance in power projects at high altitude,but also be used for correcting air gap discharge voltages at higher altitude.Therefore,we performed standard switching impulse discharge characteristic tests for long rod-plate and rod-rod air gaps in areas at different altitudes,including 0 m,2 200 m,3 000 m,4 300 m,and 5 000 m.According to the test results,altitude correction factors of switching impulse discharge voltage were calculated and analyzed.The correction factors were calculated while extending the altitude scope of altitude correction method in IEC 60071-2 from 2 000 m to 5 000 m.Test results show that,as the altitude increases,the rod-plate and rod-rod gap switching impulse discharge voltages both get lower.The decrease of rod-rod gap discharge voltage is more remarkable than that of rod-plate gap.At 2 200 m altitude,the altitude correction factors calculated by IEC 60071-2 are basically the same as the test results.However,as the altitude increases,the difference between calculated results and experimental values becomes remarkable.At altitudes of 4 300 m and 5 000 m,with a gap distance around 2 m,the calculated results are more than 10％ lower than the test results.关键词
棒-板间隙/棒-棒间隙/典型电极/操作冲击/放电特性/海拔校正Key words
rod-plate gap/ rod-rod gap/ typical electrode/ switching impulse/ discharge characteristics/ altitude correction引用本文复制引用
丁玉剑,李庆峰,廖蔚明,曾嵘,宿志一..高海拔地区典型长空气间隙的操作冲击放电特性和海拔校正[J].高电压技术,2013,39(6):1441-1446,6.基金项目
国家重点基础研究发展计划(973计划)(2011CB209403) （973计划）
Project supported by National Basic Research Program of China(973 Program) (2011CB209403). （973 Program）
