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一(yi)、液體電介質品質的(de)(de)影響1.化學成分(fen)礦物油(you)(you)中各種成分(fen)含量的(de)(de)比例對油(you)(you)的(de)(de)理化性能有(you)(you)一(yi)定影響，對油(you)(you)的(de)(de)短時(shi)耐(nai)電強(qiang)度(du)則沒有(you)(you)明顯(xian)影響。2.含水(shui)量在一(yi)定溫度(du)下油(you)(you)內(nei)最(zui)多含有(you)(you)水(shui)分(fen)25℃時(shi)約為0.2g/L，70~80℃時(shi)約為0.5g/L。水(shui)在變壓器油(you)(you)中有(you)(you)兩種狀(zhuang)...

一、純凈液體(ti)電(dian)(dian)介(jie)質的擊穿(chuan)原理常用的液體(ti)介(jie)質主(zhu)要有(you)從石油提煉出來的礦物油——變壓器油、電(dian)(dian)容器油、電(dian)(dian)纜油等。純凈液體(ti)電(dian)(dian)介(jie)質的擊穿(chuan)屬于電(dian)(dian)擊穿(chuan)。在外(wai)電(dian)(dian)場足(zu)夠(gou)強時(shi)(shi)，電(dian)(dian)子(zi)在碰撞液體(ti)分子(zi)可(ke)引起游離(li)，使電(dian)(dian)子(zi)數倍增，形(xing)成電(dian)(dian)子(zi)崩。同時(shi)(shi)正(zheng)離(li)子(zi)在陰極附(fu)近(jin)形(xing)成空間電(dian)(dian)...

一、固體電(dian)介質(zhi)老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)的(de)(de)(de)類(lei)型電(dian)氣設備中的(de)(de)(de)絕緣在長(chang)期運行過程(cheng)中會發(fa)生一系列物(wu)理(li)變化(hua)(hua)(hua)(hua)和(he)化(hua)(hua)(hua)(hua)學變化(hua)(hua)(hua)(hua)，致使(shi)其電(dian)氣、機械及其他性能逐漸(jian)劣化(hua)(hua)(hua)(hua)，這(zhe)種現象統稱為絕緣的(de)(de)(de)老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)。固體介質(zhi)的(de)(de)(de)老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)可(ke)分為電(dian)老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)、熱老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)和(he)環境老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)三(san)類(lei)。1.電(dian)老(lao)(lao)(lao)化(hua)(hua)(hua)(hua)在電(dian)場的(de)(de)(de)作用下使(shi)介質(zhi)的(de)(de)(de)物(wu)理(li)、化(hua)(hua)(hua)(hua)...

一(yi)、提高固體(ti)(ti)擊(ji)穿電壓的方法(1)改進制造工藝，使(shi)介質盡可能做到均勻致密。(2)改進絕(jue)緣(yuan)設計，使(shi)電場分布均勻。(3)改善絕(jue)緣(yuan)的運行(xing)條件。二、提高固體(ti)(ti)擊(ji)穿電壓的具體(ti)(ti)措施(1)通過精選材料、改善工藝、真(zhen)空(kong)干(gan)燥、加(jia)強(qiang)浸漬(油、膠(jiao)、漆等)，以(yi)清除固體(ti)(ti)...

影響固體電(dian)(dian)介質(zhi)擊穿電(dian)(dian)壓(ya)的因素有(you)電(dian)(dian)壓(ya)作(zuo)用(yong)(yong)時間(jian)(jian)，電(dian)(dian)場(chang)均勻程度(du)、溫度(du)、受潮、累積(ji)效應、電(dian)(dian)壓(ya)種類(lei)和機械(xie)負荷(he)。1.電(dian)(dian)壓(ya)作(zuo)用(yong)(yong)時間(jian)(jian)固體電(dian)(dian)介質(zhi)的擊穿形式與電(dian)(dian)壓(ya)作(zuo)用(yong)(yong)時間(jian)(jian)密切相(xiang)關，如圖TYBZ01403003-1所示。如果(guo)電(dian)(dian)壓(ya)作(zuo)用(yong)(yong)時間(jian)(jian)很短(例(li)如0.1s以下(xia))，...

一(yi)、固(gu)體(ti)(ti)(ti)電(dian)(dian)介質的(de)擊穿特性固(gu)體(ti)(ti)(ti)介質的(de)擊穿與氣體(ti)(ti)(ti)、液體(ti)(ti)(ti)電(dian)(dian)介質相(xiang)比，主(zhu)要有以下不同：(1)固(gu)體(ti)(ti)(ti)電(dian)(dian)介質擊穿場強高。固(gu)體(ti)(ti)(ti)電(dian)(dian)介質擊穿場強一(yi)般比氣體(ti)(ti)(ti)和(he)液體(ti)(ti)(ti)電(dian)(dian)介質高，例如(ru)，在均勻電(dian)(dian)場中，云母的(de)工頻擊穿場強可達2000～3000kV/cm。(2)固(gu)體(ti)(ti)(ti)電(dian)(dian)介質絕...