本文選題：電暈放電　切入點：離子遷移率　出處：《電工技術(shù)學(xué)報》2016年22期

【摘要】：低氣壓下離子遷移率是高海拔地區(qū)輸電線路導(dǎo)線電暈放電的關(guān)鍵參數(shù)之一,同時氮氣作為正電暈放電參與反應(yīng)的主要氣體,目前均作為常量對待,其測量結(jié)果對于建立考慮海拔因素的離子流、電暈損失等計算模型具有重要意義,因此對不同氣壓下氮氣正離子遷移率的測量顯得尤為重要。在已有研究的基礎(chǔ)上,自主設(shè)計了可模擬不同氮氣氣壓條件下離子遷移率測量平臺,并將離子門的動作方式由關(guān)閉—導(dǎo)通—關(guān)閉改進(jìn)為關(guān)閉—導(dǎo)通,從而得到幅值盡可能大的離子流波形。利用此平臺測量得到大氣條件下純氮氣環(huán)境離子的遷移率為1.113cm2V-1S-1,并通過試驗研究了氣壓在101.19~44.52k Pa范圍內(nèi)氮氣環(huán)境離子遷移率變化情況,研究發(fā)現(xiàn)氮氣正離子遷移率隨氣壓增大呈非線性減小且具有一定的飽和趨勢,最后提出了一種氮氣正離子遷移率隨氣壓變化的指數(shù)修正方法。
[Abstract]:Ion mobility is one of the key parameters of corona discharge of transmission line conductors in high altitude area under low pressure. Nitrogen, as the main gas in the reaction of positive corona discharge, is treated as a constant at present. The measured results are of great significance to the establishment of ion current and corona loss models, so it is very important to measure the mobility of nitrogen positive ions at different atmospheric pressure. An ion mobility measurement platform was designed to simulate the ion mobility under different nitrogen pressure, and the action mode of the ion gate was improved from closing-on-closing to closing-conducting. By using this platform, the ion mobility of pure nitrogen is 1.113cm2V-1S-1, and the variation of ion mobility in nitrogen environment in the range of 101.19 ~ 44.52kPa is studied by experiments. It is found that the nitrogen positive ion mobility decreases nonlinearly with the increase of atmospheric pressure and has a certain saturation trend. Finally, an exponential correction method of nitrogen positive ion mobility with air pressure is proposed.
【作者單位】： 華北電力大學(xué)河北省輸變電設(shè)備安全防御重點實驗室;國網(wǎng)長春供電公司;國網(wǎng)南京供電公司;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)(2011CB209401) 國家自然科學(xué)基金(51277073、51577069)資助項目
【分類號】：TM75

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本文編號：1667120