摘要
输电线路塔头空气间隙的大小与空气的密度、气压、湿度有关,而空气的密度、气压、湿度则又与海拔高度有关,因此空气间隙的取值需根据不同的海拔高度进行修正。采用比较法对三种目前常用的修正方法进行比较,并与试验数据进行对比。采用规程法进行操作过电压修正时,修正系数最大,IEEE法与聂氏法修正结果基本接近,且与试验数据符合度较高,故推荐采用IEEE法与聂氏法进行海拔修正。
The length of air gap of transmission line tower has relations to the density, pressure and humidity of air, which is related to the altitude, so that the length need to be corrected according to the altitude. Three commonly used correction methods are compares by test data. It is found that the regulation method gets the biggest correction coefficient when correcting the switching overvoltage, and the IEEE method and the Nie method have similar correction results which is consistent with test data. So it is suggested that the IEEE method and the Nie method be used at the altitude correction.
出处
《广西电力》
2012年第6期94-97,共4页
Guangxi Electric Power
关键词
高压线路
操作间隙
海拔修正
high voltage line, operation gap, altitude correction
