調頻式串聯諧振耐(nai)壓試驗裝置的重要(yao)性一、基本原理
耐壓(ya)試驗是(shi)利用電(dian)(dian)(dian)抗器的(de)電(dian)(dian)(dian)感與被(bei)試品電(dian)(dian)(dian)容組成LC串聯回路,調節變頻(pin)電(dian)(dian)(dian)源(yuan)輸出(chu)的(de)電(dian)(dian)(dian)壓(ya)頻(pin)率(lv),在被(bei)試品上獲得高(gao)電(dian)(dian)(dian)壓(ya),是(shi)當前高(gao)電(dian)(dian)(dian)壓(ya)試驗的(de)一(yi)種新方法,深受專家好評,在國(guo)內外已(yi)經得到廣泛(fan)的(de)使(shi)用。
根據諧(xie)振(zhen)(zhen)原理(li),我們知(zhi)道當電抗(kang)(kang)器L的感抗(kang)(kang)值Xl與回(hui)路中(zhong)(zhong)的容(rong)抗(kang)(kang)值Xc相等(deng)時,回(hui)路達到諧(xie)振(zhen)(zhen)狀態,此時回(hui)路中(zhong)(zhong)僅回(hui)路電阻R消耗有功(gong)功(gong)率(lv),而(er)無功(gong)功(gong)率(lv)則在(zai)電抗(kang)(kang)器與試(shi)品(pin)電容(rong)之(zhi)間來回(hui)振(zhen)(zhen)蕩(dang),從而(er)在(zai)試(shi)品(pin)上產生高壓(ya)。
調頻式串聯諧振(zhen)耐壓試驗(yan)裝置的重要性(xing)二、系(xi)統構成
全(quan)套試驗系(xi)統(tong)由調頻電源主機(ji)、電抗器、分(fen)壓器、激(ji)勵變壓器和補償(chang)電容器(可選器件(jian))組成,接入被試品后組成一(yi)個諧振系(xi)統(tong)進(jin)行交流耐壓實(shi)驗。
調(diao)頻(pin)式串(chuan)聯諧振耐壓試驗(yan)裝(zhuang)置的重要性(xing)主機: 就(jiu)是(shi)一臺幅值(zhi)和頻率(lv)可調(diao)的(de)正弦波交流調(diao)頻電源,給諧(xie)振回(hui)路提(ti)供(gong)激(ji)勵源,同(tong)時(shi)提(ti)供(gong)電壓顯(xian)示、電流顯(xian)示、計時(shi)、保護、報(bao)警等功(gong)能。
調頻式串聯諧振(zhen)耐壓試驗裝置的重要性(xing)電(dian)(dian)(dian)(dian)抗(kang)器:就是一(yi)個大(da)電(dian)(dian)(dian)(dian)感線(xian)圈,與被(bei)試(shi)品(相當(dang)于電(dian)(dian)(dian)(dian)容)構(gou)成回(hui)路,可配置電(dian)(dian)(dian)(dian)抗(kang)器多節電(dian)(dian)(dian)(dian)抗(kang)器,使用時通過不同(tong)(tong)的串聯(lian)(lian)、并聯(lian)(lian)組合(he)、實現(xian)不同(tong)(tong)的電(dian)(dian)(dian)(dian)感量以(yi)適(shi)用不同(tong)(tong)的試(shi)驗(yan)條(tiao)件。
分(fen)壓(ya)器(qi):內部(bu)通過電(dian)容器(qi)分(fen)壓(ya),從試品上高電(dian)壓(ya)分(fen)得低(di)電(dian)壓(ya)供(gong)主機測(ce)量、控制使用。
勵磁(ci)變(bian)壓(ya)器:隔離(li)主機電源與諧振回路電源,并(bing)升高主機的輸出(chu)電壓(ya)。
補(bu)償(chang)電(dian)容(rong)(rong)器:當試品(pin)電(dian)容(rong)(rong)量很小時,如果要實現系統諧(xie)振可(ke)能要求的電(dian)源(yuan)頻率超出(chu)試驗標準的規(gui)定,可(ke)在試品(pin)上(shang)并聯一(yi)個補(bu)償(chang)電(dian)容(rong)(rong),以(yi)實現試驗要求,稱此電(dian)容(rong)(rong)器為補(bu)償(chang)電(dian)容(rong)(rong)器。
調頻式串(chuan)聯諧振耐(nai)壓試驗裝置的重要(yao)性三、主要技術性能
功率電源電壓:AC380V±10%、50Hz;
儀(yi)器電源:220V±10%、50Hz;
諧振輸出容量:200kVA;
儀器額定電壓:0~200kV;
輸(shu)出(chu)頻率范圍:30~300Hz;
輸出電壓(ya)波(bo)形:正弦波(bo),波(bo)形畸變率(lv)<0.5%;
頻率(lv)調節靈敏度:0.1Hz,不穩(wen)定度≤0.05%;
系統噪聲:≤60db;
9、系統測(ce)量精(jing)度:<1級;
10.輸(shu)出電壓不穩定:<0.5%;
11.保護響應時間:1us;
12.電(dian)感非線(xian)性(xing)度:≤0.05%;;
13.滿功率(lv)輸出下,連續工作時間為(wei)60min
14.環境溫度:-15℃~+50℃;
15.相對濕度:≤90%RH;
16.海拔(ba)高度(du):≤2000米。
在電(dian)(dian)(dian)力試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)人員的(de)(de)(de)印(yin)象中,像電(dian)(dian)(dian)纜(lan)(lan)(lan)這樣(yang)的(de)(de)(de)大(da)容量的(de)(de)(de)電(dian)(dian)(dian)氣設備(bei),在做(zuo)耐(nai)(nai)(nai)壓(ya)的(de)(de)(de)時候,是(shi)需(xu)要(yao)使(shi)用到(dao)串(chuan)(chuan)聯(lian)諧(xie)振(zhen)(zhen)(zhen)交(jiao)(jiao)流(liu)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi)的(de)(de)(de)。但并(bing)不(bu)是(shi)所有(you)的(de)(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)做(zuo)耐(nai)(nai)(nai)壓(ya)都需(xu)要(yao)使(shi)用到(dao)串(chuan)(chuan)聯(lian)諧(xie)振(zhen)(zhen)(zhen)。這需(xu)要(yao)根(gen)據被試(shi)(shi)(shi)(shi)(shi)(shi)品(pin):電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)參數來決定(ding)。比如(ru)要(yao)搞清楚被試(shi)(shi)(shi)(shi)(shi)(shi)品(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)長(chang)度(du),電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)截面(mian)積有(you)多大(da),電(dian)(dian)(dian)壓(ya)等級有(you)多大(da)。如(ru)果電(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)(de)長(chang)度(du)并(bing)沒有(you)特(te)別長(chang),電(dian)(dian)(dian)容量不(bu)是(shi)特(te)別大(da)的(de)(de)(de)情況下(xia),做(zuo)耐(nai)(nai)(nai)壓(ya)不(bu)一定(ding)非要(yao)使(shi)用串(chuan)(chuan)聯(lian)諧(xie)振(zhen)(zhen)(zhen),也可(ke)以選擇(ze)工頻(pin)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi),也就是(shi)常規的(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)變壓(ya)器和(he)一臺升壓(ya)控(kong)制臺,也可(ke)以完成(cheng)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)。被試(shi)(shi)(shi)(shi)(shi)(shi)品(pin)電(dian)(dian)(dian)纜(lan)(lan)(lan)長(chang)度(du)較短的(de)(de)(de)情況下(xia),除了(le)可(ke)以使(shi)用工頻(pin)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi)做(zuo)耐(nai)(nai)(nai)壓(ya)之外,還可(ke)以根(gen)據試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)目的(de)(de)(de)來選擇(ze),如(ru)果電(dian)(dian)(dian)纜(lan)(lan)(lan)需(xu)要(yao)做(zuo)直流(liu)耐(nai)(nai)(nai)壓(ya)以及泄露電(dian)(dian)(dian)流(liu)的(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)就可(ke)以選擇(ze)直流(liu)高(gao)壓(ya)發生(sheng)器。但如(ru)果電(dian)(dian)(dian)纜(lan)(lan)(lan)長(chang)度(du)比較長(chang),電(dian)(dian)(dian)容量比較大(da)的(de)(de)(de)情況下(xia),選擇(ze)串(chuan)(chuan)聯(lian)諧(xie)振(zhen)(zhen)(zhen)交(jiao)(jiao)流(liu)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi)是(shi)更為理(li)想(xiang)的(de)(de)(de)電(dian)(dian)(dian)纜(lan)(lan)(lan)耐(nai)(nai)(nai)壓(ya)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)裝(zhuang)置(zhi)。
串(chuan)聯諧(xie)振交流耐(nai)(nai)壓(ya)(ya)(ya)試(shi)(shi)(shi)驗裝置適用于(yu)大(da)容量電氣設備的交流耐(nai)(nai)壓(ya)(ya)(ya)試(shi)(shi)(shi)驗,可以(yi)有效(xiao)的找出(chu)被試(shi)(shi)(shi)品(pin)的絕緣弱點,并且試(shi)(shi)(shi)驗過(guo)程可靠(kao)穩定。且試(shi)(shi)(shi)驗模式(shi)靈活(huo),多臺電抗器可根據現場試(shi)(shi)(shi)驗需求,自(zi)由靈活(huo)搭配(pei)使用,試(shi)(shi)(shi)驗操作(zuo)簡便,有全(quan)自(zi)動(dong)升壓(ya)(ya)(ya),半自(zi)動(dong)升壓(ya)(ya)(ya)以(yi)及手動(dong)升壓(ya)(ya)(ya)模式(shi)可以(yi)供試(shi)(shi)(shi)驗人(ren)員(yuan)選擇。是電纜做耐(nai)(nai)壓(ya)(ya)(ya)大(da)部(bu)分試(shi)(shi)(shi)驗人(ren)員(yuan)的選擇!