本文選題：g參數(shù)法 + 棒-板間隙　； 參考：《中國電機工程學報》2017年10期

【摘要】：IEC 60060-1推薦的g參數(shù)法常用于海拔2000m及以下地區(qū)輸電系統(tǒng)放電電壓海拔校正。然而,隨著遠距離、大容量輸電技術的發(fā)展,中國已建和在建的很多輸電工程途經(jīng)地區(qū)的海拔高度將超過3000m,最高甚至超過5000m。為分析g參數(shù)法在高海拔地區(qū)的適用性,該文基于g參數(shù)法對海拔55、2200、3000、4300和5000m地區(qū),2~9m棒-板間隙50%操作沖擊放電電壓進行了海拔校正分析,結果表明:同一海拔高度下,隨著間隙距離的增大,校正因數(shù)相對誤差呈下降趨勢;隨著海拔高度的增加,校正因數(shù)的相對誤差越來越大,且指數(shù)因子m、w取值的分散性也逐漸增大,當海拔超過3000m時,g參數(shù)法不再適用于棒-板長空氣間隙操作沖擊放電電壓海拔校正。最后,綜合考慮氣象條件,文中提出了一種可用于不同海拔地區(qū)4~9m間隙距離U_(50)的計算方法,并選取麥夸特法進行數(shù)據(jù)擬合,給出了計算公式中參數(shù)m_1、m_2、m_3的推薦值,分別為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.
【作者單位】： 華北電力大學電氣與電子工程學院;中國電力科學研究院;國家電網(wǎng)公司;
【分類號】：TM85

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