發(fā)布時(shí)間：2018-12-17 08:53

【摘要】：伴隨中國(guó)城鎮(zhèn)化進(jìn)程的推進(jìn),電纜正逐步取代架空線(xiàn)而廣泛應(yīng)用于城市配電網(wǎng)絡(luò)。然而,隨著配網(wǎng)電纜規(guī)模的快速增長(zhǎng),電纜故障也日益頻發(fā)。配網(wǎng)電纜的運(yùn)行環(huán)境大都較為惡劣,部分電纜接頭長(zhǎng)期處于潮濕的環(huán)境,甚至直接浸泡在水中,電纜內(nèi)部很容易受潮,進(jìn)而引發(fā)電纜絕緣故障。為此搭建了恒壓負(fù)荷循環(huán)試驗(yàn)平臺(tái),選取3條嚴(yán)重受潮的10 kV XLPE電纜,利用恒壓負(fù)荷循環(huán)試驗(yàn)將受潮電纜中的潮氣和水分排出。通過(guò)測(cè)量潮氣和水分排出前后電纜的絕緣電阻和介質(zhì)損耗,得到絕緣電阻和介質(zhì)損耗隨潮氣排出的變化規(guī)律,從而獲得潮氣對(duì)電纜絕緣特性的影響機(jī)理。
[Abstract]:With the development of urbanization in China, cables are gradually replacing overhead lines and widely used in urban distribution networks. However, with the rapid growth of distribution network cable scale, cable failures are increasingly frequent. The operating environment of distribution network cable is mostly bad. Some cable connectors are in wet environment for a long time, even immerse directly in water. The internal cable is easy to be dampened, which leads to cable insulation failure. In this paper, a constant voltage load cycle test platform was set up, and three 10 kV XLPE cables with severe damp were selected, and the moisture and moisture in the cables were discharged by constant voltage load cycle test. By measuring the insulation resistance and dielectric loss of cables before and after moisture and moisture removal, the variation of insulation resistance and dielectric loss with moisture discharge is obtained, and the influence mechanism of moisture on cable insulation characteristics is obtained.
【作者單位】： 清華大學(xué)電機(jī)工程與應(yīng)用電子技術(shù)系;廣州供電局有限公司;清華大學(xué)深圳研究生院;
【分類(lèi)號(hào)】：TM247

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