本文關(guān)鍵詞：等離子體射流快速改性促進表面電荷衰減　出處：《電工技術(shù)學(xué)報》2017年16期 　論文類型：期刊論文

  更多相關(guān)文章： 等離子體射流 薄膜沉積 表面電荷 環(huán)氧樹脂 閃絡(luò)電壓

【摘要】：隨著高壓直流輸電迅猛發(fā)展,絕緣材料在直流電壓下表面電荷積聚現(xiàn)象嚴重威脅直流輸電系統(tǒng)的安全可靠運行。為加快絕緣材料表面電荷的消散,采用大氣壓等離子體射流,以TEOS為前驅(qū)物,在環(huán)氧樹脂表面沉積SiO_x薄膜。對改性前后材料表面化學(xué)組成、表面電導(dǎo)率、表面電荷特性、表面陷阱分布以及耐壓特性進行多參數(shù)測量,研究等離子體射流改性前后環(huán)氧樹脂表面特性。實驗結(jié)果表明:等離子體處理在環(huán)氧樹脂表面引入大量以Si-O-Si及Si-OH基團為主的無機基團,且表面電導(dǎo)率提高2個數(shù)量級。隨著改性時間的延長,表面電荷的初始積聚量減少,消散速度加快,陷阱能級深度變淺;沿面閃絡(luò)電壓呈現(xiàn)先增后降的趨勢,在改性180s時閃絡(luò)電壓提高到最高值9.0k V。研究結(jié)果表明:通過大氣壓等離子體射流在聚合物表面沉積薄膜能夠提高環(huán)氧樹脂絕緣性能,為其工程應(yīng)用提供了有效的改性方法。
[Abstract]:With the rapid development of HVDC transmission, the phenomenon of surface charge accumulation at DC voltage seriously threatens the safe and reliable operation of HVDC system. SiO_x films were deposited on epoxy resin surface by atmospheric pressure plasma jet and TEOS as precursor. The surface chemical composition, surface conductivity and surface charge characteristics of the materials before and after modification were studied. The surface trap distribution and voltage characteristics are measured with multiple parameters. The surface characteristics of epoxy resin before and after plasma jet modification were studied. The experimental results showed that a large number of inorganic groups, mainly Si-O-Si and Si-OH groups, were introduced into the surface of epoxy resin by plasma treatment. The surface conductivity increases by two orders of magnitude. With the increase of modification time, the initial accumulation of surface charge decreases, the velocity of dissipation accelerates, and the depth of trap energy level becomes shallow. The flashover voltage along the surface increases first and then drops. The flashover voltage was increased to a maximum value of 9.0kV at 180s. The results show that the insulating properties of epoxy resin can be improved by deposition of films on polymer surface by atmospheric pressure plasma jet. It provides an effective modification method for its engineering application.
【作者單位】： 華北電力大學(xué)電氣與電子工程學(xué)院;中國科學(xué)院電工研究所;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金面上項目(11575194) 國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)(2014CB239505-3) 中央高�；究蒲袠I(yè)務(wù)費專項資金(2016ZZD07) 河北省自然科學(xué)基金面上項目(E2015502081)資助
【分類號】：TM21
【正文快照】： 0引言直流輸電具有系統(tǒng)穩(wěn)定、調(diào)節(jié)快速、運行可靠、造價便宜等優(yōu)點,適用于大容量遠距離輸電[1]。在我國電力系統(tǒng)不斷發(fā)展及直流輸電電壓等級不斷提高的時代背景下,高壓設(shè)備的絕緣問題面臨日益嚴峻的挑戰(zhàn)。在直流電場下絕緣材料表面更易產(chǎn)生電荷積聚現(xiàn)象,由此引起電場畸變、誘

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