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255);">高壓試驗(yàn)變壓器是發(fā)電廠和變電所的重要設(shè)置裝備安置之一。高壓試驗(yàn)變壓器的作用是多方面的不但能升高電壓把電能送到用電地域，還能把電壓丟失為各級(jí)運(yùn)用電壓，以滿意用電的必要?？傊龎号c降壓都有必要由變壓器來(lái)結(jié)束。在電力系統(tǒng)傳送電能的進(jìn)程中，一定會(huì)孕育發(fā)生電壓和功率兩部分消耗，在運(yùn)送共同功率時(shí)電壓消耗與電壓成反比，功率消耗與電壓的平方成反比。運(yùn)用變壓器行進(jìn)電壓，選擇了送電丟失。高壓試驗(yàn)變壓器是由繞在共同鐵芯上的兩個(gè)或兩個(gè)以上的線圈繞組構(gòu)成，繞組之間是通過(guò)交變磁場(chǎng)而接洽著并按電磁感到原理作業(yè)。高壓試驗(yàn)變壓器安排方位應(yīng)思量便于工作、查驗(yàn)和運(yùn)送，一同應(yīng)選擇安靜可靠的當(dāng)?shù)亍Ｔ谶\(yùn)用變壓器時(shí)有必要公平地選用變壓器的額定容量。變壓器空載工作時(shí)，需用較大的無(wú)功功率。這些無(wú)功功率要由供電系統(tǒng)供應(yīng)。變壓器的容量若選擇過(guò)大，不但添加了初出資，并且使變壓器持久處于空載或輕載工作，使空載消耗的比重增大，功率因數(shù)丟失，網(wǎng)絡(luò)消耗添加，多么工作既不經(jīng)濟(jì)</span>。變壓器容量選擇過(guò)小，會(huì)使變壓器持久過(guò)負(fù)荷，易損壞設(shè)置裝備安置。因此，變壓器的額定容量應(yīng)憑據(jù)用電負(fù)荷的必要舉行選擇，不宜過(guò)大或過(guò)小。<strong><span style="font-size: 14px;"><br/></span></strong></p><p><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">高壓試驗(yàn)變壓器作用：</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">① 產(chǎn)生工頻高電壓，使之作用于被測(cè)試設(shè)備的絕緣上，以考查被測(cè)試設(shè)備在長(zhǎng)時(shí)間工作電壓及瞬時(shí)內(nèi)過(guò)電壓下是否可靠工作。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">②試驗(yàn)研究高壓輸電線路氣體絕緣、電暈損耗、靜電感應(yīng)、長(zhǎng)串絕緣閃絡(luò)電壓、內(nèi)絕緣局部放電及帶電作業(yè)等項(xiàng)目必</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">另外試驗(yàn)研究高壓輸電線路的氣體絕緣。電暈放電損耗，靜電感應(yīng)，長(zhǎng)串絕緣之間高電壓。局部放電及帶電作業(yè)等項(xiàng)目的必須備品。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">直流高壓：沖擊高壓的電流，產(chǎn)生操作沖擊波。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">指標(biāo)：工頻輸出大大超過(guò)變壓器工頻電壓額定值，達(dá)幾百kv，幾千kv 2250kv-3000kv</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">高壓試驗(yàn)變壓器與電力變壓器運(yùn)行條件不同</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">原理相同，變化大，運(yùn)行條件不同</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">① 多數(shù)工作在容性負(fù)載下，電力變壓器一般工作在感性負(fù)荷下。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">② 所需試驗(yàn)功率不大，所以變壓器容量不很大，電力變壓容量很大。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">③ 工作時(shí)，經(jīng)常放電，電力變壓由電保護(hù)裝置。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">④ 電力變壓運(yùn)行受大氣和操作過(guò)電壓侵略，試驗(yàn)變壓器，但試品放電，工作時(shí)在繞組上產(chǎn)生梯度過(guò)電壓。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">⑤ 工作時(shí)間短，滿載運(yùn)行更短，耐壓試驗(yàn)1min，電力變壓器終年滿載運(yùn)行。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">⑥ 溫度低，電力變壓由需散熱冷卻。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">運(yùn)行條件有利，設(shè)計(jì)安全系數(shù)小，試驗(yàn)變壓器自身試驗(yàn)電壓僅為額定電壓105%-11%，電力變壓器試驗(yàn)電壓高。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">實(shí)驗(yàn)變壓器設(shè)計(jì)溫升也較低，故只在短時(shí)運(yùn)行如 5min</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">無(wú)暈試驗(yàn)變壓器：為滿足測(cè)量電力設(shè)備絕緣局部放電量的需要。有些試驗(yàn)變壓器本身局部放電量極小，dpc稱為一</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;"><img src="https://img77.chem17.com/9/20220219/637808564497716889269.gif" border="0" align="middle" bbbbb="294" height="188" style="margin: 0px; padding: 0px; border-width: 0px;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">試驗(yàn)電壓頻率，波形的影響交流耐壓試驗(yàn)——儀表測(cè)有效值工頻放電或擊穿——取電壓峰值。國(guó)家規(guī)定——試驗(yàn)電壓應(yīng)是45-65hz交流電壓。特殊試驗(yàn)，低與或高與這一范圍。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">波形為兩個(gè)半波相同的近似正弦波。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "microsoft yahei"; color: rgb(51, 51, 51); white-space: normal; background-color: rgb(255, 255, 255); text-indent: 25px; line-height: 30px;">為此必須重視試驗(yàn)變壓器輸出的電壓波形是否合乎要求。</p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" 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