概述

變壓(ya)(ya)(ya)(ya)器和互(hu)感器的(de)(de)(de)感應(ying)耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)是保證變壓(ya)(ya)(ya)(ya)器質量符合國家標準的(de)(de)(de)一(yi)項重(zhong)要試(shi)驗(yan)(yan)。變壓(ya)(ya)(ya)(ya)器繞(rao)組的(de)(de)(de)匝間(jian)(jian)、層間(jian)(jian)、段間(jian)(jian)及(ji)相間(jian)(jian)絕(jue)緣(yuan)的(de)(de)(de)縱(zong)絕(jue)緣(yuan)感應(ying)耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)，則是變壓(ya)(ya)(ya)(ya)器絕(jue)緣(yuan)試(shi)驗(yan)(yan)中的(de)(de)(de)重(zhong)要項目。三倍頻(pin)高壓(ya)(ya)(ya)(ya)發生器基于縱(zong)絕(jue)緣(yuan)試(shi)驗(yan)(yan)中的(de)(de)(de)特殊性，需要通(tong)過施加倍頻(pin)電(dian)源裝置，以提高繞(rao)組間(jian)(jian)絕(jue)緣(yuan)的(de)(de)(de)試(shi)驗(yan)(yan)電(dian)壓(ya)(ya)(ya)(ya)，從而(er)達到(dao)耐壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)的(de)(de)(de)目的(de)(de)(de)。

程控式三倍頻高壓發生器

工作原理(li)

是(shi)由三(san)臺(tai)單相(xiang)(xiang)變(bian)(bian)壓(ya)組成(cheng)，三(san)臺(tai)單相(xiang)(xiang)變(bian)(bian)壓(ya)器的一次(ci)(ci)繞組接(jie)(jie)成(cheng)星形，二次(ci)(ci)繞組接(jie)(jie)成(cheng)開(kai)口(kou)三(san)角形，因為加在一次(ci)(ci)繞組上的電壓(ya)較高，鐵芯飽和(he)，三(san)臺(tai)單相(xiang)(xiang)變(bian)(bian)壓(ya)器磁通(tong)中都有基頻(pin)分量和(he)三(san)倍頻(pin)分量，三(san)臺(tai)單相(xiang)(xiang)變(bian)(bian)壓(ya)器二次(ci)(ci)開(kai)口(kou)三(san)角形連接(jie)(jie)使基頻(pin)分量相(xiang)(xiang)抵消，從而實(shi)行開(kai)口(kou)三(san)角的倍頻(pin)電壓(ya)輸出，并(bing)通(tong)過繞組外接(jie)(jie)單相(xiang)(xiang)調(diao)壓(ya)器，即可(ke)實(shi)現三(san)倍頻(pin)電壓(ya)的調(diao)節。

程控式三倍頻高壓發生器

技術(shu)參數

 根據國(guo)家(jia)試(shi)驗(yan)標準，對(dui)電(dian)(dian)(dian)(dian)(dian)力變(bian)壓(ya)器及電(dian)(dian)(dian)(dian)(dian)壓(ya)互感器感應(ying)試(shi)驗(yan)電(dian)(dian)(dian)(dian)(dian)壓(ya)大(da)(da)致2-3倍(bei)大(da)(da)工作相電(dian)(dian)(dian)(dian)(dian)壓(ya)考(kao)慮。*，變(bian)壓(ya)器在額定(ding)頻(pin)率(lv)，額定(ding)電(dian)(dian)(dian)(dian)(dian)壓(ya)下，鐵芯(xin)接(jie)近(jin)飽和，若用工頻(pin)電(dian)(dian)(dian)(dian)(dian)源(yuan)在被試(shi)變(bian)壓(ya)器繞組兩(liang)端施加(jia)大(da)(da)于額定(ding)電(dian)(dian)(dian)(dian)(dian)壓(ya)的試(shi)驗(yan)電(dian)(dian)(dian)(dian)(dian)壓(ya)，則空(kong)載(zai)勵(li)磁(ci)電(dian)(dian)(dian)(dian)(dian)流會急劇增加(jia)，達(da)到不可(ke)允(yun)許的程度，從感應(ying)電(dian)(dian)(dian)(dian)(dian)勢的關系式可(ke)以(yi)看出，為了施加(jia)大(da)(da)于額定(ding)電(dian)(dian)(dian)(dian)(dian)壓(ya)的試(shi)驗(yan)電(dian)(dian)(dian)(dian)(dian)壓(ya)，而又(you)不使鐵芯(xin)飽和，可(ke)采(cai)用增加(jia)電(dian)(dian)(dian)(dian)(dian)源(yuan)頻(pin)率(lv)的辦法，必須用大(da)(da)于倍(bei)頻(pin)電(dian)(dian)(dian)(dian)(dian)源(yuan)發生器。