基于g参数法的棒-板长空气间隙操作冲击电压海拔校正分析

发布时间：2018-05-01 08:41

本文选题：g参数法 + 棒-板间隙　；参考：《中国电机工程学报》2017年10期

【摘要】：IEC 60060-1推荐的g参数法常用于海拔2000m及以下地区输电系统放电电压海拔校正。然而,随着远距离、大容量输电技术的发展,中国已建和在建的很多输电工程途经地区的海拔高度将超过3000m,最高甚至超过5000m。为分析g参数法在高海拔地区的适用性,该文基于g参数法对海拔55、2200、3000、4300和5000m地区,2~9m棒-板间隙50%操作冲击放电电压进行了海拔校正分析,结果表明:同一海拔高度下,随着间隙距离的增大,校正因数相对误差呈下降趋势;随着海拔高度的增加,校正因数的相对误差越来越大,且指数因子m、w取值的分散性也逐渐增大,当海拔超过3000m时,g参数法不再适用于棒-板长空气间隙操作冲击放电电压海拔校正。最后,综合考虑气象条件,文中提出了一种可用于不同海拔地区4~9m间隙距离U_(50)的计算方法,并选取麦夸特法进行数据拟合,给出了计算公式中参数m_1、m_2、m_3的推荐值,分别为0.097、-0.068、0.446。
[Abstract]:The g parameter method recommended by IEC 60060-1 is often used to calibrate the discharge voltage of transmission system at an altitude of 2000m and below. However, with the development of long distance and large capacity transmission technology, the altitude of many transmission projects that have been built and under construction in China will exceed 3000m, or even more than 5000 mm. In order to analyze the applicability of the g parameter method in the high altitude region, the altitude correction analysis of 50% operating impulse discharge voltage of the rod-plate gap at 55x2200m 3000m and 5000m altitude is carried out based on the g parameter method. The results show that at the same altitude, With the increase of gap distance, the relative error of correction factor decreases, and with the increase of altitude, the relative error of correction factor becomes larger and larger, and the dispersion of index factor mw increases gradually. When the altitude is more than 3000 m, the g parameter method is no longer suitable for the altitude correction of impulse discharge voltage in rod-plate long air gap operation. Finally, considering the meteorological conditions, a method for calculating the distance between 4m and 9m at different elevations is presented, and the McQuat method is selected to fit the data. The recommended value of m1m2m3 in the calculation formula is given, which is 0.097- 0.0680.446.
【作者单位】：华北电力大学电气与电子工程学院;中国电力科学研究院;国家电网公司;
【分类号】：TM85

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