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href="/article.html">技術(shù)文章</a> > 互感器勵磁特性曲線測量周期及標(biāo)準(zhǔn)要求</div> <div id="quimsyk" class="inpage_content"> <div id="quimsyk" class="nr_main_box"> <h1 class="inside_rnewtil">互感器勵磁特性曲線測量周期及標(biāo)準(zhǔn)要求</h1> <div id="quimsyk" class="inside_rnewtime">點(diǎn)擊次數(shù)：1832 更新時間：2023-05-15</div> <div id="quimsyk" class="inside_rnewcon"><p><span style="font-size: 16px;">互感器勵磁特性曲線測量周期及標(biāo)準(zhǔn)要求<br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">互感器交接試驗(yàn)中測量電流互感器的勵磁特性曲線，應(yīng)符合下列規(guī)定：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">1、當(dāng)繼電保護(hù)對電流互感器的勵磁特性有要求時，應(yīng)進(jìn)行勵磁特性曲線測量；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">2、當(dāng)電流互感器為多抽頭時，應(yīng)測量當(dāng)前擬定使用的抽頭或最大變比的抽頭。測量后應(yīng)核對是否符合產(chǎn)品技術(shù)條件要求；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">3、當(dāng)勵磁特性測量時施加的電壓高于繞組允許值(電壓峰值 4.5kV)，應(yīng)降低試驗(yàn)電源頻率；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">4、330kV及以上電壓等級的獨(dú)立式、GIS和套管式電流互感器，線路容量為300MW及以上容量的母線電流互感器及各種電壓等級的容量超過1200MW的變電站帶暫態(tài)性能的電流互感器，其具有暫態(tài)特性要求的繞組，應(yīng)根據(jù)銘牌參數(shù)采用交流法(低頻法)或直流法測量其相關(guān)參數(shù)，并應(yīng)核查是否滿足相關(guān)要求。</span></p><p style="text-align: center"><img style="max-width: 800px; max-height: 300%; width: 547px; height: 390px;" src="https://img63.chem17.com/9/20230515/638197330198525427780.jpg" title="02A077A14C7DEF2010979E6CF555AAFE.jpg" alt="02A077A14C7DEF2010979E6CF555AAFE.jpg" width="547" height="390"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">互感器交接試驗(yàn)中電磁式電壓互感器的勵磁曲線測量，應(yīng)符合下列規(guī)定：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">1、用于勵磁曲線測量的儀表應(yīng)為方均根值表，當(dāng)發(fā)生測量結(jié)果與出廠試驗(yàn)報(bào)告和型式試驗(yàn)報(bào)告相差大于30%時，應(yīng)核對使用的儀表種類是否正確;</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">2、勵磁曲線測量點(diǎn)應(yīng)包括額定電壓的20%、50%、80%、100%和120%;</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">3、對于中性點(diǎn)直接接地的電壓互感器，最高測量點(diǎn)應(yīng)為150%;</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">4、對于中性點(diǎn)非直接接地系統(tǒng)，半絕緣結(jié)構(gòu)電磁式電壓互感器最高測量點(diǎn)應(yīng)為 190%，全絕緣結(jié)構(gòu)電磁式電壓互感器最高測量點(diǎn)應(yīng)為120%。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">互感器交接試驗(yàn)中電容式電壓互感器(CVT)檢測，應(yīng)符合下列規(guī)定：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">1、CVT 電容分壓器電容量與額定電容值比較不宜超過5%~10%，介質(zhì)損耗因數(shù) tano’不應(yīng)大于0.2%；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">2、疊裝結(jié)構(gòu) CVT 電磁單元因結(jié)構(gòu)原因不易將中壓連線引出時，可不進(jìn)行電容量和介質(zhì)損耗因數(shù)(tan 的測試，但應(yīng)進(jìn)行誤差試驗(yàn):當(dāng)誤差試驗(yàn)結(jié)果不滿足誤差限值要求時，應(yīng)斷開電磁單元中壓連接線，檢測電磁單元各部件及電容分壓器的電容量和介質(zhì)損耗因數(shù)(tan&) ;</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">3、CVT 電容式電壓互感器誤差試驗(yàn)應(yīng)在支架(柱)上進(jìn)行;</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">4、當(dāng)電磁單元結(jié)構(gòu)許可，電磁單元檢查應(yīng)包括中間變壓器的勵磁曲線測量、補(bǔ)償電抗器感抗測量、阻尼器和限幅器的性能檢查，交流耐壓試驗(yàn)按照電磁式電壓互感器，施加電壓應(yīng)按出廠試驗(yàn)的80%執(zhí)行。</span></p></div> <div id="quimsyk" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a 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