环球体育手机版官网

消息静态   News
接洽咱们   Contact
搜刮   Search

变压器绕组变形实验的功效简介

2014-09-05 09:39:44      点击:

  是(shi)按照电力行业规范DL/T9112004丈量变压器(qi)(qi)绕(rao)组变形(xing)的公用(yong)测试仪器(qi)(qi),电力(li)变压器(qi)(qi)在(zai)运转(zhuan)或运输进(jin)程(cheng)中不可防止地要(yao)蒙受各(ge)类毛病(bing)短(duan)(duan)路电流的打(da)击或物理撞击,在(zai)短(duan)(duan)路电流产生的壮大(da)电能源(yuan)感(gan)化下,变压器(qi)(qi)绕(rao)组可以(yi)或许(xu)落空不变性,致使部(bu)分歪曲、鼓包或移位等(deng)永远变形(xing)景象,如许(xu)将严峻影响变压器(qi)(qi)的宁(ning)静运转(zhuan),以(yi)是,查抄变压器(qi)(qi)的绕(rao)组环(huan)境是不可少的。

判(pan)定变(bian)压器绕(rao)组(zu)环境的测(ce)试道理有低电(dian)压短路阻抗法(fa)和频(pin)次呼(hu)应法(fa)。

频次呼应法道理

     频次(ci)(ci)(ci)呼(hu)应(ying)(ying)法便是(shi)用(yong)扫描产生器将一组(zu)(zu)(zu)(zu)差别频次(ci)(ci)(ci)的(de)(de)(de)正弦波电(dian)压(ya)(ya)加(jia)到变(bian)(bian)(bian)(bian)压(ya)(ya)器绕(rao)(rao)组(zu)(zu)(zu)(zu)的(de)(de)(de)一端而后收罗绕(rao)(rao)组(zu)(zu)(zu)(zu)两头的(de)(de)(de)端口(kou)特(te)(te)(te)色(se)参(can)数(shu),如输人、输入阻抗和电(dian)压(ya)(ya)、电(dian)传播输比(bi)(bi)的(de)(de)(de)频次(ci)(ci)(ci)呼(hu)应(ying)(ying)曲线等,经(jing)由过程(cheng)阐发(fa)端口(kou)参(can)数(shu)的(de)(de)(de)频次(ci)(ci)(ci)图(tu)(tu)谱特(te)(te)(te)色(se),来判定绕(rao)(rao)组(zu)(zu)(zu)(zu)的(de)(de)(de)布(bu)(bu)局特(te)(te)(te)色(se),若(ruo)是(shi)绕(rao)(rao)组(zu)(zu)(zu)(zu)产生变(bian)(bian)(bian)(bian)形,就(jiu)会(hui)使散布(bu)(bu)电(dian)容和电(dian)感产生变(bian)(bian)(bian)(bian)更,反应(ying)(ying)到端口(kou)参(can)数(shu)的(de)(de)(de)频次(ci)(ci)(ci)图(tu)(tu)谱也会(hui)产生变(bian)(bian)(bian)(bian)更,对同范例的(de)(de)(de)变(bian)(bian)(bian)(bian)压(ya)(ya)器绕(rao)(rao)组(zu)(zu)(zu)(zu),因为(wei)绕(rao)(rao)组(zu)(zu)(zu)(zu)布(bu)(bu)局的(de)(de)(de)近似(si)性,其测得的(de)(de)(de)频次(ci)(ci)(ci)呼(hu)应(ying)(ying)曲线一定有可比(bi)(bi)性,以是(shi)频次(ci)(ci)(ci)呼(hu)应(ying)(ying)法是(shi)经(jing)由过程(cheng)毛病前后登科频次(ci)(ci)(ci)的(de)(de)(de)呼(hu)应(ying)(ying)曲线来判定变(bian)(bian)(bian)(bian)压(ya)(ya)器绕(rao)(rao)组(zu)(zu)(zu)(zu)变(bian)(bian)(bian)(bian)形水平的(de)(de)(de)。

功效特色:无线蓝(lan)牙接(jie)口,美国军用(yong)高精度芯片,测试速率快(kuai),集(ji)成电路(lu)板,不变机能好,靠得(de)住(zhu)性(xing)好,有(you)线性(xing)扫描(miao)和分段(duan)扫描(miao)两种手(shou)艺。

低电压短路阻抗(kang)法(fa)测试道理

    变(bian)(bian)(bian)(bian)压器(qi)(qi)短路(lu)(lu)阻抗是(shi)(shi)(shi)(shi)(shi)当(dang)负载阻抗为零时,变(bian)(bian)(bian)(bian)压器(qi)(qi)外部(bu)的(de)等效(xiao)阻抗、短路(lu)(lu)阻抗的(de)电(dian)(dian)抗份量,即短路(lu)(lu)电(dian)(dian)抗,便是(shi)(shi)(shi)(shi)(shi)绕(rao)(rao)组的(de)泄(xie)电(dian)(dian)抗,泄(xie)电(dian)(dian)抗是(shi)(shi)(shi)(shi)(shi)由绕(rao)(rao)组的(de)多(duo)少尺寸所(suo)决议的(de),对一(yi)台变(bian)(bian)(bian)(bian)压器(qi)(qi),当(dang)绕(rao)(rao)组变(bian)(bian)(bian)(bian)形(xing)、多(duo)少尺寸产生变(bian)(bian)(bian)(bian)更时,其短路(lu)(lu)电(dian)(dian)抗值也要变(bian)(bian)(bian)(bian)更,若是(shi)(shi)(shi)(shi)(shi)运转中的(de)变(bian)(bian)(bian)(bian)压器(qi)(qi)遭到了(le)短路(lu)(lu)电(dian)(dian)流(liu)的(de)打(da)击,为了(le)查抄其绕(rao)(rao)组是(shi)(shi)(shi)(shi)(shi)不是(shi)(shi)(shi)(shi)(shi)变(bian)(bian)(bian)(bian)形(xing),可(ke)将(jiang)短路(lu)(lu)前后的(de)短路(lu)(lu)电(dian)(dian)抗值加(jia)以(yi)(yi)比拟(ni),若是(shi)(shi)(shi)(shi)(shi)变(bian)(bian)(bian)(bian)更较大,则可(ke)以(yi)(yi)为绕(rao)(rao)组有较着变(bian)(bian)(bian)(bian)形(xing)。

普通在运(yun)转现场对电力变压器停(ting)止(zhi)低电压短(duan)路(lu)阻抗测试(shi),并(bing)与铭牌或短(duan)路(lu)毛病前所测值停(ting)止(zhi)比拟(ni),就可以或许判定严峻毛病短(duan)路(lu)电流形(xing)成的绕组有没有较着(zhe)变形(xing)。

错误(wu)谬(miu)误(wu):合(he)用于35000以下(xia)用阻抗法(fa),短路阻抗法(fa)丈量(liang)只能对(dui)变压(ya)器的定性丈量(liang),只能显(xian)现(xian)是(shi)不是(shi)有毛病,没(mei)法(fa)显(xian)现(xian)毛病波(bo)形。