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变压器绕组变形实验的功效简介

2014-09-05 09:39:44      点击:

  是按照电力行(xing)业规范DL/T9112004丈(zhang)量变(bian)(bian)(bian)压(ya)器绕(rao)(rao)组(zu)变(bian)(bian)(bian)形(xing)的(de)(de)公用测试仪(yi)器,电力(li)变(bian)(bian)(bian)压(ya)器在运转(zhuan)或运输(shu)进程中不可(ke)防止地要(yao)蒙(meng)受各类(lei)毛(mao)病短路电流的(de)(de)打击或物理(li)撞击,在短路电流产生的(de)(de)壮大(da)电能源感(gan)化(hua)下,变(bian)(bian)(bian)压(ya)器绕(rao)(rao)组(zu)可(ke)以(yi)或许落空不变(bian)(bian)(bian)性(xing),致(zhi)使部分歪曲(qu)、鼓包或移位(wei)等永(yong)远变(bian)(bian)(bian)形(xing)景象,如许将严峻影响变(bian)(bian)(bian)压(ya)器的(de)(de)宁静运转(zhuan),以(yi)是(shi),查抄变(bian)(bian)(bian)压(ya)器的(de)(de)绕(rao)(rao)组(zu)环(huan)境(jing)是(shi)不可(ke)少的(de)(de)。

判(pan)定(ding)变(bian)压器绕(rao)组环境的测试道理有低电压短路阻抗法和频次呼应法。

频(pin)次呼(hu)应法道理

     频(pin)(pin)(pin)次(ci)呼(hu)(hu)(hu)应(ying)(ying)法(fa)便是(shi)用扫描产(chan)(chan)(chan)生器将(jiang)一(yi)组差别频(pin)(pin)(pin)次(ci)的正(zheng)弦波(bo)电压(ya)加到变压(ya)器绕组的一(yi)端而(er)后收罗绕组两(liang)头的端口(kou)特(te)(te)色参数,如输(shu)(shu)人、输(shu)(shu)入(ru)阻抗(kang)和(he)电压(ya)、电传播(bo)输(shu)(shu)比(bi)的频(pin)(pin)(pin)次(ci)呼(hu)(hu)(hu)应(ying)(ying)曲线(xian)等,经由(you)过(guo)程阐发端口(kou)参数的频(pin)(pin)(pin)次(ci)图(tu)谱(pu)特(te)(te)色,来判定绕组的布(bu)局特(te)(te)色,若(ruo)是(shi)绕组产(chan)(chan)(chan)生变形(xing),就会(hui)使散布(bu)电容(rong)和(he)电感(gan)产(chan)(chan)(chan)生变更,反应(ying)(ying)到端口(kou)参数的频(pin)(pin)(pin)次(ci)图(tu)谱(pu)也会(hui)产(chan)(chan)(chan)生变更,对同范例(li)的变压(ya)器绕组,因为绕组布(bu)局的近似(si)性,其测得的频(pin)(pin)(pin)次(ci)呼(hu)(hu)(hu)应(ying)(ying)曲线(xian)一(yi)定有可比(bi)性,以是(shi)频(pin)(pin)(pin)次(ci)呼(hu)(hu)(hu)应(ying)(ying)法(fa)是(shi)经由(you)过(guo)程毛病前后登(deng)科频(pin)(pin)(pin)次(ci)的呼(hu)(hu)(hu)应(ying)(ying)曲线(xian)来判定变压(ya)器绕组变形(xing)水(shui)平的。

功(gong)效特色:无线蓝牙接口,美国军用高精度(du)芯片,测试(shi)速率快,集成(cheng)电路板,不变(bian)机(ji)能(neng)好,靠得(de)住性(xing)好,有(you)线性(xing)扫描和(he)分段(duan)扫描两(liang)种(zhong)手艺。

低(di)电压短路阻抗法测试道理

    变(bian)(bian)(bian)压(ya)器(qi)(qi)短(duan)路(lu)(lu)阻(zu)抗(kang)是(shi)(shi)当(dang)负(fu)载阻(zu)抗(kang)为(wei)零(ling)时,变(bian)(bian)(bian)压(ya)器(qi)(qi)外部的(de)(de)等效阻(zu)抗(kang)、短(duan)路(lu)(lu)阻(zu)抗(kang)的(de)(de)电(dian)(dian)抗(kang)份(fen)量,即短(duan)路(lu)(lu)电(dian)(dian)抗(kang),便是(shi)(shi)绕组(zu)(zu)的(de)(de)泄(xie)电(dian)(dian)抗(kang),泄(xie)电(dian)(dian)抗(kang)是(shi)(shi)由绕组(zu)(zu)的(de)(de)多少(shao)尺(chi)寸所决议的(de)(de),对一台变(bian)(bian)(bian)压(ya)器(qi)(qi),当(dang)绕组(zu)(zu)变(bian)(bian)(bian)形(xing)(xing)、多少(shao)尺(chi)寸产生变(bian)(bian)(bian)更时,其短(duan)路(lu)(lu)电(dian)(dian)抗(kang)值也(ye)要变(bian)(bian)(bian)更,若是(shi)(shi)运转中(zhong)的(de)(de)变(bian)(bian)(bian)压(ya)器(qi)(qi)遭(zao)到了(le)短(duan)路(lu)(lu)电(dian)(dian)流的(de)(de)打击(ji),为(wei)了(le)查抄(chao)其绕组(zu)(zu)是(shi)(shi)不是(shi)(shi)变(bian)(bian)(bian)形(xing)(xing),可将短(duan)路(lu)(lu)前后的(de)(de)短(duan)路(lu)(lu)电(dian)(dian)抗(kang)值加以(yi)(yi)比拟,若是(shi)(shi)变(bian)(bian)(bian)更较(jiao)(jiao)大,则(ze)可以(yi)(yi)为(wei)绕组(zu)(zu)有较(jiao)(jiao)着变(bian)(bian)(bian)形(xing)(xing)。

普通(tong)在运转(zhuan)现(xian)场对(dui)电(dian)力变(bian)压器停(ting)止低电(dian)压短路(lu)(lu)阻抗测试(shi),并与铭牌或短路(lu)(lu)毛(mao)(mao)病(bing)(bing)前所测值停(ting)止比(bi)拟,就(jiu)可以或许判定严峻毛(mao)(mao)病(bing)(bing)短路(lu)(lu)电(dian)流(liu)形成的绕组有没(mei)有较着变(bian)形。

错误谬误:合用(yong)于35000以下用阻抗法(fa),短路阻抗法(fa)丈(zhang)量(liang)只(zhi)能对变压器的定性丈(zhang)量(liang),只(zhi)能显现(xian)(xian)是(shi)不是(shi)有毛病,没法(fa)显现(xian)(xian)毛病波形(xing)。