本文選題：空間電荷 + 交聯(lián)副產(chǎn)物�。� 參考：《中國電機(jī)工程學(xué)報(bào)》2015年11期

【摘要】：為了研究交聯(lián)聚乙烯(cross-linked polyethylene,XLPE)在直流高壓下的空間電荷特性與材料內(nèi)部交聯(lián)副產(chǎn)物的關(guān)系,測試了3種經(jīng)過不同脫氣處理(0、24、72 h)的交聯(lián)聚乙烯試樣在直流預(yù)壓后的空間電荷分布,并通過氣相色譜 質(zhì)譜聯(lián)用儀測試了3種試樣內(nèi)部交聯(lián)副產(chǎn)物的殘余量。研究表明:隨著脫氣時(shí)間的延長,試樣內(nèi)部的交聯(lián)副產(chǎn)物種類沒有改變,但每種副產(chǎn)物的殘余量均明顯減少。未脫氣試樣在直流高壓下,靠近兩側(cè)電極處均積累了大量的異極性電荷,并且電荷量隨著電場升高明顯增多。試樣經(jīng)過脫氣處理后,內(nèi)部積累的空間電荷量明顯減少。低電場下電極附近僅觀察到少量的同極性電荷,當(dāng)電場升高后,異極性電荷逐漸代替同極性電荷成為主導(dǎo)。這說明,交聯(lián)聚乙烯材料內(nèi)部的異極性電荷主要來源于直流電場下交聯(lián)副產(chǎn)物的解離,并且電場越高,副產(chǎn)物解離形成的離子電荷越多。脫氣處理能有效減少交聯(lián)聚乙烯內(nèi)部交聯(lián)副產(chǎn)物的殘余量,進(jìn)而改善其空間電荷特性。
[Abstract]:In order to study the relationship between the space charge characteristics of cross-linked polyethylene (cross-linked polyethylene) under DC high voltage and the cross-linking by-products in the material, the space charge distribution of three kinds of cross-linked polyethylene samples after different degassing treatment (0 ~ 2472 h) was measured after DC preloading. The residual amount of crosslinked by-products in three samples was measured by gas chromatography-mass spectrometry (GC-MS). The results show that with the prolongation of the degassing time, the kinds of cross-linked by-products in the sample are not changed, but the residual amount of each by-product is obviously reduced. At DC high voltage, the undegassed sample accumulates a large amount of heteropolar charges near both electrodes, and the charge amount increases obviously with the increase of electric field. After degassing, the amount of space charge accumulated in the sample decreased obviously. Only a small amount of homopolar charge was observed near the electrode under low electric field, and when the electric field increased, the heteropolar charge gradually replaced the same polar charge as the dominant charge. The results show that the heteropolar charges in the cross-linked polyethylene materials are mainly derived from the dissociation of the cross-linked by-products under the DC electric field, and the higher the electric field, the more ionic charges formed by the dissociation of the by-products. Degassing treatment can effectively reduce the residual amount of cross-linking by-products and improve the space charge characteristics of crosslinked polyethylene.
【作者單位】： 上海交通大學(xué)電氣工程系;
【基金】：國家高技術(shù)研究發(fā)展計(jì)劃(2012AA030310) 國家自然科學(xué)基金項(xiàng)目(51277118)~~
【分類號(hào)】：TM75;TM21

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本文編號(hào)：2078028