本文選題：油紙絕緣 + 回復(fù)電壓�。� 參考：《高壓電器》2017年11期

【摘要】：變壓器絕緣紙中水分會加速油紙絕緣的老化,縮短變壓器壽命,因此,準(zhǔn)確診斷變壓器絕緣紙老化狀態(tài)以及水分含量對變壓器安全運行具有重要意義。文中通過測試分析不同水分、不同聚合度的絕緣油紙回復(fù)電壓曲線,研究發(fā)現(xiàn)當(dāng)絕緣紙?zhí)幱诘退趾繝顟B(tài)(0.5%≤Mp3%)時,回復(fù)電壓參數(shù)隨水分含量改變變化較快,當(dāng)絕緣紙?zhí)幱诟咚趾繝顟B(tài)(3%≤Mp≤5%)時,回復(fù)電壓4個參數(shù)值基本保持穩(wěn)定。回復(fù)電壓最大值、初始斜率隨絕緣紙水分含量呈負(fù)指數(shù)規(guī)律增長,而中心時間常數(shù)和回復(fù)電壓半衰期呈負(fù)指數(shù)規(guī)律減小,4個參數(shù)隨水分改變的變化幅度均隨絕緣紙聚合度線性變化,通過數(shù)據(jù)擬合得到回復(fù)電壓特征參量與絕緣紙聚合度、水分含量的表達(dá)式。回復(fù)電壓半衰期與絕緣紙水分含量及老化狀態(tài)關(guān)系密切,能作為反映固體絕緣紙微水含量和聚合度的有效特征參量。
[Abstract]:Moisture in insulation paper of transformer will accelerate the aging of oil-paper insulation and shorten the life of transformer. Therefore, it is of great significance to accurately diagnose the aging state and moisture content of transformer insulator paper for the safe operation of transformer. Through testing and analyzing the recovery voltage curve of insulating oil paper with different moisture content and different polymerization degree, it is found that when the insulation paper is in the state of low moisture content (0.5% 鈮，

本文編號：1861458