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href="/SonList-1408386.html" title="壓敏電阻測試儀">壓敏電阻測試儀</a></li> </div> </ul> </ul> </div> <div id="5hlvxzllpl3" class="page-right"> <div id="5hlvxzllpl3" class="onurl"> <a href="/"><img src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁</a>><a href="/article.html">技術(shù)文章</a> > 干式變壓器繞組直流電阻測量</div> <div id="5hlvxzllpl3" class="page-news"> <div id="5hlvxzllpl3" class="newshowheader"> <h1 class="nd_title">干式變壓器繞組直流電阻測量</h1> <div id="5hlvxzllpl3" class="article-info"> <span> 瀏覽：</span> 1219<span id="5hlvxzllpl3" class="split">|</span> <span id="publishtime">更新時間：2021-09-20</span> <span id="5hlvxzllpl3" class="split">|</span> </div> </div> <div id="5hlvxzllpl3" class="page-newshow"> <p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; text-indent: 2em;"><strong><span style="color:#181818;font-family:微軟雅黑, Arial, 宋體"><span style="font-size: 15px;">干式變壓器繞組直流電阻測量</span></span></strong><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; text-indent: 2em;"><strong><span style="color:#181818;font-family:微軟雅黑, Arial, 宋體"><span style="font-size: 15px;"></span></span></strong></p><p style="margin-top: 20px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: 20px; font-family: "Microsoft YaHei", Arial, ????, ????, sans-serif; text-indent: 2em; white-space: normal;"><strong><span style="text-indent: 2em;"><span style="font-family: "Microsoft YaHei", Arial, ????, ????, sans-serif; text-indent: 28px;">電力變壓器繞組變形測試儀</span></span></strong><span style="text-indent: 2em;"><span style="font-family: "Microsoft YaHei", Arial, ????, ????, sans-serif; text-indent: 28px;"></span>根據(jù)對變壓器內(nèi)部繞組特征參數(shù)的測量，采用目前世界發(fā)達國家正在開發(fā)完善的內(nèi)部故障頻率響應(yīng)分析(FRA)方法，對變壓器內(nèi)部故障作出準確判斷。</span></p><p style="margin-top: 20px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: 20px; font-family: "Microsoft YaHei", Arial, ????, ????, sans-serif; text-indent: 2em; white-space: normal;">變壓器設(shè)計制造完成后，其線圈和內(nèi)部結(jié)構(gòu)就確定下來，因此對一臺多繞組的變壓器線圈而言，如果電壓等級相同、繞制方法相同，則每個線圈對應(yīng)參數(shù)(Ci、Li)就應(yīng)該是確定的。因此每個線圈的頻域特征響應(yīng)也隨之確定，對應(yīng)的三相線圈之間其頻率圖譜具有一定可比性。</p><p style="margin-top: 20px; margin-bottom: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: 20px; font-family: "Microsoft YaHei", Arial, ????, ????, sans-serif; text-indent: 2em; white-space: normal;">變壓器在試驗過程中發(fā)生匝間、相間短路，或在運輸過程中發(fā)生沖撞，造成線圈相對位移，以及運行過程中在短路和故障狀態(tài)下因電磁拉力造成線圈變形，就會使變壓器繞組的分布參數(shù)發(fā)生變化。進而影響并改變變壓器原有的頻域特征，即頻率響應(yīng)發(fā)生幅度變化和諧振頻點偏移等。并根據(jù)響應(yīng)分析方法研制開發(fā)的變壓器繞組測試儀，就是這樣一種新穎的變壓器內(nèi)部故障無損檢測設(shè)備。它適用于63kV～500kV電力變壓器的內(nèi)部結(jié)構(gòu)故障檢測。</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; text-indent: 2em;"><strong><span style="color:#181818;font-family:微軟雅黑, Arial, 宋體"><span style="font-size: 15px;"><br/></span></span></strong><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">一、繞組直流電阻測量的目的</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.1 繞組線連接處焊接或機械連接是否良好，是否有焊接或連接不良</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.2 引線與外殼、引線與分接開關(guān)的連接是否良好</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.3 引線與引線的焊接或機械連接是否良好</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.4 導線的規(guī)格及電阻率是否符合要求</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.5 各相繞組的電阻是否平衡？</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">1.6 變壓器繞組的溫升是根據(jù)溫升試驗前繞組的冷阻和溫升試驗后端口電源的瞬時熱阻計算的，因此溫升試驗需要測量電阻。</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">二<span style="margin: 0px; padding: 0px; border: 0px; font: inherit; text-indent: 32px;">、</span>測量條件</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">2.1 應(yīng)記錄被測繞組的溫度和繞組端子間的電阻值，并用直流電測量</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">2.2 測量時應(yīng)注意盡量減少自感效應(yīng)的影響</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">2.3 量錢，變壓器在恒溫環(huán)境下靜止時間不少于3h</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">2.4 繞組溫度應(yīng)與繞組電阻同時測量</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">三、檢驗標準</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">A線%＜2%，A相%＜4%（SN＜1600KVA）</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">A%=(Rmax-Rmin)/R平*100%</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">四<span style="margin: 0px; padding: 0px; border: 0px; font: inherit; text-indent: 32px;">、</span>測量結(jié)果的計算</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">4.1 R0=Rm*(235+T1)/(235+T2) 銅 235 鋁 225</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">4.2 線相電阻轉(zhuǎn)換△接法 Y接法</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">五、測量時的注意事項</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">5.1 用于測量直流電阻的電流應(yīng)為額定電流的2%-10%，不超過額定電流的20%，以免電流引起繞組發(fā)熱溫度誤差。</p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24);"><br/></p><p style="margin-top: 2px; margin-bottom: 2px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: inherit; font-family: 微軟雅黑, Arial, 宋體; color: rgb(24, 24, 24); text-indent: 2em;">5.2 直流電路中有電流I時，變壓器鐵芯磁場斷開時會產(chǎn)生高壓，危及人身安全，損壞儀器。因此，必須使用放電電路，使電流從 I 緩慢流過電阻上的損耗。一個小時后斷開線路。</p> </div> <div id="5hlvxzllpl3" class="pagetb"> <p> 上一條：<a href="/Article-2785440.html">蓄電池內(nèi)阻測試儀使用注意事項</a></p> <p> 下一條：<a href="/Article-2785438.html">為什么做絕緣子測試以及測試的方法介紹</a></p> </div> </div> </div> </div> <div id="5hlvxzllpl3" class="footer"> <div id="5hlvxzllpl3" class="foot"> <p>Copyright © 2024 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