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class="newstit">干式变压器的差动?；ぴ?/h1> <div class="1zlx7hpjjv5" id="Context_news"> <div class="1zlx7hpjjv5" id="jiathis"> <div id="1zlx7hpjjv5" class="left">  <div class="1zlx7hpjjv5" id="bdshare" class="bdshare_t bds_tools get-codes-bdshare"> <span id="1zlx7hpjjv5" class="bds_more">分享到：</span> <a class="bds_qzone"></a> <a class="bds_tsina"></a> <a class="bds_tqq"></a> <a class="bds_renren"></a> <a class="shareCount"></a> </div> <script type="text/javascript" id="bdshare_js" data="type=tools&uid=91689" ></script> <script type="text/javascript" id="bdshell_js"></script> <script type="text/javascript"> document.getElementById("bdshell_js").src = "http://news.share.baidu.com/static/js/shell_v2.js?cdnversion=" + new Date().getHours(); </script>  </div> <div id="1zlx7hpjjv5" class="right">文章来源:<a href="">北京创联汇通电气</a> ????? 发布时间： 2020-11-14 09:12:06</div> </div> <div class="1zlx7hpjjv5" id="daodu"><span>导读：</span>来源：网络差动?；じ攀?差动?；な鞘淙隩A（电流互感器）的两端电流矢量差，当达到设定的动作值时启动动作元件。?；し段г谑淙隒T的两端之间的设备（可以是线路，发电机，电动 </div> <p><p style="width:100%"> 差动保护概述</p> 差动?；な鞘淙隩A（电流互感器）的两端电流矢量差，当达到设定的动作值时启动动作元件。保护范围在输入CT的两端之间的设备（可以是线路，发电机，电动机，干式变压器等电气设备）。差动?；ぴ? <p> </p> 差动?；な抢没舴虻缌鞫ɡ砉ぷ鞯?，当干式变压器正常工作或区外故障时，将其看作理想干式变压器，则流入干式变压器的电流和流出电流（折算后的电流）相等，差动继电器不动作。当干式变压器内部故障时，两侧（或三侧）向故障点提供短路电流，差动?；じ惺艿降亩蔚缌鞯暮驼扔诠收系愕缌鳎疃痰缙鞫?。差动保护原理简单、使用电气量单纯、?；し段魅?、动作不需延时，一直用于干式变压器做主?；?。另外干式变压器?；せ褂邢呗凡疃；?、母线差动?；さ鹊?。干式变压器差动?；な欠乐垢墒奖溲蛊髂诓抗收系闹鞅；?。其接线方式，按回路电流法原理，把干式变压器两侧电流互感器二次线圈接成环流，干式变压器正常运行或外部故障，如果忽略不平衡电流，在两个互感器的二次回路臂上没有差电流流入继电器，即：iJ=ibp=iI-iII=0。如果内部故障，如图ZD点短路，流入继电器的电流等于短路点的总电流。即：iJ=ibp=iI2+iII2。当流入继电器的电流大于动作电流，保护动作断路器跳闸。<img ratio="1.327659574468085" src="http://www.ywpw.cn/cpzs/pic/3777.jpg" style="width:100%" type="jpeg" /> <p style="width:100%"> </p> <p style="width:100%"> 【免责声明】文章为作者先立观点，不代表创联汇通干式变压器立场。如因作品内容、版权等存在问题，请于本文刊发30日内联系创联汇通干式变压器进行删除或洽谈版权使用事宜。</p> <p> </p> </p> <div class="1zlx7hpjjv5" id="prevnext"> <span>上一篇：<a href="/cpzs/2769.html">干式变压器的故障和?；づ渲?/a> </span>????? <span>下一篇：<a 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