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href="/article.html">技術(shù)文章</a> > <span>該怎么維護高壓鼓風機發(fā)電機？</span> </div> <div id="zbbpzj5" class="clear"></div> </div>  <div id="npxjtpf" class="NyNews_Detail"> <h1 class="NyNewsDetail_Title">該怎么維護高壓鼓風機發(fā)電機？</h1> <div id="rtttt5b" class="NyNewsDetail_Tips"><img src="/skins/189514/images/time3.png" />更新時間：2024-01-30 <img src="/skins/189514/images/eye1.png" />瀏覽次數(shù)：1143</div> <div id="5tvttnv" class="NyNewsDetail_Con"> <div><span style="font-size: 16px;">　　高壓鼓風機發(fā)電機逆功率保護又稱功率方向保護。一般而言，高壓鼓風機發(fā)電機的功率方向應(yīng)該為由高壓鼓風機發(fā)電機流向母線，但是當高壓鼓風機發(fā)電機失磁或其他某種原因，高壓鼓風機發(fā)電機有可能變?yōu)殡妱訖C運行，即從系統(tǒng)中吸取有功功率。這就是逆功率。當逆功率達到一定值時，高壓鼓風機發(fā)電機的保護動作，或動作于發(fā)信號或動作于跳閘。<br /> </span></div><div><span style="font-size: 16px;">　　并網(wǎng)運行的汽輪高壓鼓風機發(fā)電機，在汽輪機的主汽門關(guān)閉之后，便作為同步電動機運行：吸收有功功率而拖著汽輪機轉(zhuǎn)動，可向系統(tǒng)發(fā)出無功功率，長期運行對汽輪機的葉片不利，高壓鼓風機發(fā)電機逆功率保護主要保護汽輪機不受損害。<br /> </span></div><div><span style="font-size: 16px;">　　對汽輪機逆功率保護的整定計算，就是要確定該保護的動作功率Pdz及動作延時t。 1、動作功率Pdz的整定汽輪高壓鼓風機發(fā)電機逆功率保護的動作功率可按下式計算： Pdz=(Krel*P1)/η Pdz-逆功率保護的動作功率 Krel-可靠系數(shù)，取0.8 P1-主汽門關(guān)閉后，汽輪機維持同步轉(zhuǎn)速旋轉(zhuǎn)所消耗的功率，該功率的大小除與汽輪機的結(jié)構(gòu)及容量有關(guān)之外，還與汽輪高壓鼓風機發(fā)電機的主蒸汽系統(tǒng)的結(jié)構(gòu)(管道結(jié)構(gòu)及有無旁路管道等)有關(guān)一般取額定功率的1.5~2% η-高壓鼓風機發(fā)電機拖動汽輪高壓鼓風機發(fā)電機旋轉(zhuǎn)時的效率，取0.98~0.99 所以：Pdz≈(1.2~1.6%)PN PN-高壓鼓風機發(fā)電機的額定功率。實際中，Pdz=可取1~1.5%PN。<br /> </span></div><div><span style="font-size: 16px;">　　2、動作延時高壓鼓風機發(fā)電機逆功率保護的動作延時，應(yīng)按照汽輪高壓鼓風機發(fā)電機主汽門關(guān)閉后允許運行的時間來整定，該允許時間一般為10~15min。計算及運行實踐表明，當汽輪機蒸汽系統(tǒng)有旁路管道時，允許運行時間還要長一些。因此，若按照汽輪機主汽門關(guān)閉之后允許運行的時間來整定保護的動作延時，可取5~10min。動作后作用于解列滅磁。另外，zui近投運的大型汽輪高壓鼓風機發(fā)電機，多采用逆功率保護去啟動程序跳閘回路，此時，動作時間通常取1~2s。對于程控逆功率保護，<br /> </span></div><div><span style="font-size: 16px;">　　由于動作時間短，在主汽門點閉后很短的時間內(nèi)，由于汽輪機及高壓鼓風機發(fā)電機的慣性，實際逆功率可能很小，因此逆功率的定值不應(yīng)大于1%PN。<br /> </span></div><div><span style="font-size: 16px;">　　上一條<br /> </span></div><div><span style="font-size: 16px;">　　國內(nèi)高壓風機技術(shù)的發(fā)展方向</span></div> </div> <div id="7xjttbl" class="NyPrevNext"> <ul> <li>上一篇：<a href="/Article-377590.html">中壓鼓風機出現(xiàn)了噪音，有哪些原因？</a></li> <li><a href="/article.html"><img src="/skins/189514/images/fhlb.png" /></a></li> <li>下一篇：<a href="/Article-377098.html">磨床吸塵器在磨床加工過程中起到了至關(guān)重要的作用</a></li> </ul> </div> </div>  </div> <div id="b7hnzh5" class="clear"></div> </div>   <div id="t7lzlp7" class="h_foot_box"> <div id="j7dnlrz" class="h_foot w1300 clear"> <div id="pxfp7nv" class="foot_t"> <div id="v7f7flj" class="foot_t_l"> <div id="f7jhrxf" class="foot_logo"><img src="/skins/189514/images/foot_logo.png" alt="ComName" /></div> <div id="dlhp75j" class="foot_nav"> <ul> <li><a href="/">首頁</a></li> <li><a href="/aboutus.html" rel="nofollow">關(guān)于我們</a></li> <li><a href="/products.html">產(chǎn)品中心</a></li> <li><a href="/news.html">新聞中心</a></li> <li><a href="/article.html">技術(shù)文章</a></li> <li><a href="/order.html" rel="nofollow">在線留言</a></li> <li><a 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