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首頁>產品中心>直流系統接地查找儀>直流系統接地故障測試儀>ZFZL-V直流(liu)系統接地(di)故障測試(shi)儀
ZFZL-V直流系統接地故障測試儀

發布時間:2022-11-11

簡要描述:

ZFZL-V直流系統(tong)(tong)接地(di)故障測試儀(yi):本(ben)裝置以系統(tong)(tong)安全為首要(yao)(yao)前提,按行業標準(zhun)的zui高要(yao)(yao)求,以可(ke)靠的低(di)頻信號方式進行檢測,并在現場進行了大量的實際應用,對系統(tong)(tong)無任(ren)何影響。

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ZFZL-V直流系統接地故障測試儀

ZFZL-V直流系統接地故障測試儀

一、 概 述

直(zhi)流(liu)系(xi)(xi)(xi)(xi)統(tong)(tong)接(jie)(jie)地(di)是一(yi)種易發生(sheng)(sheng)且對電(dian)力系(xi)(xi)(xi)(xi)統(tong)(tong)危害較(jiao)大(da)的故(gu)障。直(zhi)流(liu)系(xi)(xi)(xi)(xi)統(tong)(tong)正極接(jie)(jie)地(di),可能造成繼電(dian)保(bao)(bao)護(hu)誤動(dong),因為跳閘線圈接(jie)(jie)直(zhi)流(liu)電(dian)源負極,系(xi)(xi)(xi)(xi)統(tong)(tong)再有一(yi)點(dian)接(jie)(jie)地(di)或(huo)(huo)絕緣不(bu)(bu)良(liang),可能引(yin)起(qi)保(bao)(bao)護(hu)誤動(dong);直(zhi)流(liu)系(xi)(xi)(xi)(xi)統(tong)(tong)負極接(jie)(jie)地(di),系(xi)(xi)(xi)(xi)統(tong)(tong)再有一(yi)點(dian)接(jie)(jie)地(di)或(huo)(huo)絕緣不(bu)(bu)良(liang),可將跳閘回路(lu)(lu)或(huo)(huo)合閘回路(lu)(lu)短路(lu)(lu),造成保(bao)(bao)護(hu)拒動(dong),此時(shi)系(xi)(xi)(xi)(xi)統(tong)(tong)發生(sheng)(sheng)故(gu)障,保(bao)(bao)護(hu)的拒動(dong)必然導致(zhi)系(xi)(xi)(xi)(xi)統(tong)(tong)事故(gu)擴大(da),同(tong)時(shi)還(huan)可能燒(shao)(shao)壞(huai)繼電(dian)器(qi)的觸點(dian)或(huo)(huo)燒(shao)(shao)保(bao)(bao)險。

我公司(si)自主設計制(zhi)造的(de)(de)(de)(de)便攜(xie)式直流接(jie)地(di)(di)查找儀,能(neng)夠(gou)適用(yong)于任何電壓(ya)等(deng)級的(de)(de)(de)(de)直流系統(tong)(tong),配備了(le)高精度(du)的(de)(de)(de)(de)檢(jian)測鉗表,通過對(dui)多種信號的(de)(de)(de)(de)高效處理(li)(li)大(da)大(da)提高了(le)檢(jian)測范圍與抗干擾能(neng)力;采(cai)用(yong)了(le)先進計算方(fang)法和模糊控制(zhi)理(li)(li)論(lun),將被檢(jian)測支路的(de)(de)(de)(de)絕(jue)(jue)緣(yuan)程(cheng)度(du)以(yi)絕(jue)(jue)緣(yuan)指數及波形的(de)(de)(de)(de)形式表示出(chu)來,充分(fen)體(ti)現了(le)人(ren)工智(zhi)能(neng)的(de)(de)(de)(de)*性;對(dui)于接(jie)地(di)(di)點位(wei)(wei)置(zhi)的(de)(de)(de)(de)斷定,它們更是擁有準(zhun)(zhun)確(que)的(de)(de)(de)(de)判斷力,每次檢(jian)測都能(neng)夠(gou)指出(chu)接(jie)地(di)(di)點位(wei)(wei)置(zhi)相對(dui)檢(jian)測點的(de)(de)(de)(de)方(fang)向,從(cong)而快速、準(zhun)(zhun)確(que)地(di)(di)實(shi)現環路接(jie)地(di)(di)檢(jian)測。除(chu)此之外,用(yong)戶(hu)可以(yi)根據自身系統(tong)(tong)需(xu)要在絕(jue)(jue)緣(yuan)告警(jing)門(men)限(xian)值(zhi)范圍內訂制(zhi)合適的(de)(de)(de)(de)絕(jue)(jue)緣(yuan)告警(jing)門(men)限(xian)值(zhi)的(de)(de)(de)(de)設備,用(yong)戶(hu)只需(xu)要將鉗表上的(de)(de)(de)(de)檔位(wei)(wei)與檢(jian)測器(qi)上的(de)(de)(de)(de)量程(cheng)對(dui)應起來就能(neng)實(shi)現直流接(jie)地(di)(di)的(de)(de)(de)(de)檢(jian)測或者是絕(jue)(jue)緣(yuan)程(cheng)度(du)的(de)(de)(de)(de)分(fen)析。

不(bu)僅(jin)重(zhong)點(dian)解決(jue)了直流系統間接接地(di)(di)(di)、非金屬接地(di)(di)(di)、環路接地(di)(di)(di)、正(zheng)(zheng)負同時接地(di)(di)(di)、正(zheng)(zheng)負平衡(heng)接地(di)(di)(di)、多點(dian)接地(di)(di)(di)等疑難故障(zhang)的準確(que)檢(jian)測,并且還能準確(que)的顯示(shi)系統電壓、對地(di)(di)(di)電壓、接地(di)(di)(di)阻值,真正(zheng)(zheng)解決(jue)了運行及檢(jian)修(xiu)人員(yuan)的后顧之憂。

本裝置以系(xi)統(tong)安全為首(shou)要前提,按行業標準的zui高要求,以可(ke)靠(kao)的低頻信(xin)號方式進(jin)(jin)行檢測(ce),并在現場進(jin)(jin)行了(le)大量(liang)的實際應用,對系(xi)統(tong)無任何影(ying)響。

ZFZL-V直流系統接地故障測試儀

二、裝置構成及原理

2. 1 裝置的構(gou)成

該裝置由信(xin)號發生(sheng)器、故(gu)(gu)障檢測器和(he)信(xin)號采(cai)集器(鉗表(biao))三部分組成,信(xin)號發生(sheng)器與直流系統正(zheng)負母線和(he)地相(xiang)(xiang)連,當直流系統出現(xian)接地故(gu)(gu)障后,它會(hui)自(zi)動產生(sheng)一(yi)個低(di)頻小信(xin)號,故(gu)(gu)障檢測器與鉗表(biao)獨立于信(xin)號發生(sheng)器,故(gu)(gu)障檢測器與鉗表(biao)之間(jian)使用連接線相(xiang)(xiang)連,通過對待檢測支路(lu)漏電流信(xin)號的采(cai)集、分析(xi),從(cong)而判斷出該支路(lu)的絕緣情(qing)況。

2.2 裝(zhuang)置(zhi)的工作(zuo)原理

定(ding)位裝(zhuang)(zhuang)置的工作原理(li)是:當直流(liu)系(xi)(xi)統(tong)(tong)(tong)發生(sheng)(sheng)接(jie)地(di)(di)故障(zhang)或絕緣(yuan)降低(整(zheng)(zheng)個(ge)直流(liu)系(xi)(xi)統(tong)(tong)(tong)絕緣(yuan)電阻(zu)小(xiao)于報(bao)警(jing)整(zheng)(zheng)定(ding)值),直流(liu)系(xi)(xi)統(tong)(tong)(tong)電壓(ya)(ya)(ya)監(jian)測裝(zhuang)(zhuang)置發出(chu)警(jing)報(bao)時(shi),將信(xin)號(hao)(hao)發生(sheng)(sheng)器(qi)接(jie)入直流(liu)系(xi)(xi)統(tong)(tong)(tong)的正、負(fu)母(mu)線和(he)地(di)(di)之間。信(xin)號(hao)(hao)發生(sheng)(sheng)器(qi)自(zi)動判斷直流(liu)系(xi)(xi)統(tong)(tong)(tong)電壓(ya)(ya)(ya)等級(ji),自(zi)動判斷接(jie)地(di)(di)故障(zhang)的極(ji)性、接(jie)地(di)(di)程度,自(zi)動分析絕緣(yuan)監(jian)測平衡電橋(qiao)回(hui)路接(jie)線方式和(he)平衡電橋(qiao)電阻(zu)大小(xiao),形成信(xin)號(hao)(hao)輸出(chu)的智(zhi)能反饋,向直流(liu)正負(fu)母(mu)線和(he)地(di)(di)間,發射適宜系(xi)(xi)統(tong)(tong)(tong)檢測,對(dui)系(xi)(xi)統(tong)(tong)(tong)無影響的低頻信(xin)號(hao)(hao),并實時(shi)顯示(shi)系(xi)(xi)統(tong)(tong)(tong)電壓(ya)(ya)(ya)、正對(dui)地(di)(di)電壓(ya)(ya)(ya)、負(fu)對(dui)地(di)(di)電壓(ya)(ya)(ya)和(he)系(xi)(xi)統(tong)(tong)(tong)對(dui)地(di)(di)絕緣(yuan)總阻(zu)抗(kang)。

故(gu)障(zhang)(zhang)檢測(ce)器檢測(ce)各回路(lu)(lu)對地絕緣的(de)直流信(xin)號漏(lou)電流,并模(mo)擬顯示接(jie)地回路(lu)(lu)絕緣狀態,判斷(duan)出接(jie)地故(gu)障(zhang)(zhang)回路(lu)(lu)(支路(lu)(lu)),并繼續沿故(gu)障(zhang)(zhang)回路(lu)(lu)(支路(lu)(lu))檢測(ce)出接(jie)地故(gu)障(zhang)(zhang),將故(gu)障(zhang)(zhang)點(dian)準確定(ding)位(wei)。

信號發生器、故(gu)障(zhang)檢(jian)(jian)測器均采用微計算(suan)機技術,具有(you)集成(cheng)程度(du)高,判斷速度(du)快,檢(jian)(jian)測靈(ling)(ling)敏(min)度(du)高、抗干(gan)(gan)擾能力強、故(gu)障(zhang)定位準(zhun)確等特(te)點(dian)。在(zai)軟件(jian)處理上利用了模糊控(kong)制理論和通信的(de)(de)噪(zao)聲理論,并(bing)依據直流系統(tong)的(de)(de)特(te)點(dian)優化了算(suan)法,即使系統(tong)有(you)大分布電(dian)容的(de)(de)干(gan)(gan)擾、電(dian)磁脈沖干(gan)(gan)擾和其它(ta)噪(zao)聲干(gan)(gan)擾的(de)(de)影(ying)響,也(ye)能準(zhun)確地(di)判斷出接(jie)地(di)故(gu)障(zhang)點(dian),為(wei)接(jie)地(di)故(gu)障(zhang)的(de)(de)查(cha)找(zhao)提(ti)供(gong)了有(you)力的(de)(de)保障(zhang)。在(zai)硬件(jian)上引(yin)進*的(de)(de)檢(jian)(jian)測傳感器,直流信號檢(jian)(jian)測靈(ling)(ling)敏(min)度(du)高達(da)0. 1mA,可檢(jian)(jian)測150K-500K接(jie)地(di)的(de)(de)檢(jian)(jian)測靈(ling)(ling)敏(min)度(du),使多點(dian)接(jie)地(di)、環路接(jie)地(di)、絕緣普遍降低等難以(yi)解(jie)決(jue)的(de)(de)問題迎刃而解(jie)。

 

三.裝(zhuang)置主要特點

1.高精度(du)采樣鉗(qian)表

該裝置采用了高分(fen)辨率(0. ;1mA)信號采樣直(zhi)流鉗(qian)表,能夠實現(xian)對多點接地,高阻接地點的定位(wei);

2. 接地點(dian)方向(xiang)顯示

該裝置(zhi)具(ju)有接地(di)點(dian)方(fang)向顯示(shi),可以高效(xiao)快(kuai)速的(de)處理復雜支路或(huo)環(huan)路中接地(di)點(dian)的(de)定位;

3. 具有絕緣指數顯(xian)示功能

絕(jue)(jue)緣指數是(shi)為(wei)分析待測(ce)支路絕(jue)(jue)緣程度(du)(du)而引入說(shuo)法,以(yi)0—100的(de)(de)數字形式來反映被測(ce)支路的(de)(de)絕(jue)(jue)緣程度(du)(du),數字越大表示絕(jue)(jue)緣越差,該指數結合高(gao)精度(du)(du)鉗表非常有(you)利于多點(dian)接(jie)地(di)與高(gao)阻(zu)接(jie)地(di)的(de)(de)檢測(ce)。