?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> mayisoft 继电保护各类故障分析及故障举?中国工业电器?/title><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /><meta name="description" content="继电保护装置是电力系统密不可分的一部分,是保障电力设备安全和防止、限制电力系统大面积停电的最基本、最重要、最有效的技术手段。实践证明,继电保护一旦发生不正确动作,往往会扩大事故,酿成严重后果。一??.."><meta name="keywords" content="继电保护各类故障分析及故障举?> <link href="/style/Template/public.css" rel="stylesheet" type="text/css" /> <link href="/style/Template/tech.css" rel="stylesheet" type="text/css" /> <!-- Google Tag Manager --> <noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-9RQX" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <!-- End Google Tag Manager --> </head> <body> <div id="" class="tech_box"> <!-- header begin --> <div id="" class="header"> <div id="" class="head_top_nav"> <div id="" class="index_home"><a href="http://salescamper.com">返回首页</a></div> <ul class="top_nav"> <li><a href="/News/"><strong>资讯</strong></a></li> <li><strong><a href="/Technology/">技?/a></strong></li> <li><strong><a href="/ProductCenter/">产品</a></strong></li> <li><strong><a href="/Exhibition/">展会</a></strong></li> <li><strong><a href="/Brand/">品牌</a></strong></li> <li><strong></strong></li> <li><a href="/Topic/">专题</a></li> <li><a href="/Video/">视频</a></li> <li><a href="/Activity/ExcellentCompany/" target="_blank">活动</a></li> <li><a href="/Material/MaterialList0/">下载</a></li> <li><a href="/Article/ArticleList8/">论文</a></li> <li><a href="/Article/ArticleList31/">行情</a></li> <li><a href="/Article/ArticleList11/">培训</a></li> <li><a href="/Article/ArticleList5/">访谈</a></li> <li><a href="/Article/ArticleList9/">应用</a></li> <li></li> <li class="nav_font"><a href="/Telents/">人才</a></li> <li class="nav_font"></li> <li class="nav_font"></li> </ul> </div> <div id="" class="header_cen"> <div id="" class="logo"> <a href="http://salescamper.com/"> <img src="/images/temp/logo.png" width="153" height="40" alt="中国工业电器? /> </a> </div> <div id="" class="header_nav"> <ul class="nav_font1"><li></li><li></li><li><a href="http://wyq.cnelc.com/">稳压?/a><a href="http://bpq.cnelc.com/">变频?/a><a href="http://salescamper.com/setMap.html">更多>></a></li></ul><ul><li style="font-weight: bold;"></li><li></li><li></li></ul><ul><li style="font-weight: bold;"></li><li></li></ul> </div> </div> <div id="" class="top_ad_search"> <div class="top_ad" id="TechDetailsAdPostion1"><img style="display:none" src="/images/temp/ad17.gif" onload="getAdvertisement('TechnologyDetails','TechDetailsAdPostion1')" /></div> <div id="" class="top_search"> <div id="" style="float:left; 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</p> <p style="text-indent:2em;"> ?元件损坏的影响?</p> <p style="text-indent:2em;"> 2.装置元器件的损?</p> <p style="text-indent:2em;"> 1)三极管击穿导致保护出口动作 </p> <p style="text-indent:2em;"> 2)三极管漏电流过大导致误发信?</p> <p style="text-indent:2em;"> 3.回路绝缘的损坏 </p> <p style="text-indent:2em;"> 1?回路中接地易引起开关跳?</p> <p style="text-indent:2em;"> 2?绝缘击穿造成的跳?</p> <p style="text-indent:2em;"> 如:一套运行的发电机保护,在机箱后部跳闸插件板的背板接线相距很近,在跳闸触点出线处相距只有2mm,由于带电导体的静电作用,将灰尘吸到了接线焊点的周围,因天气潮湿两焊点之间形成导电通道,绝缘击穿,造成发电机跳闸停机事故?</p> <p style="text-indent:2em;"> 3?不易检查的接地?</p> <p style="text-indent:2em;"> 在二次回路中,电源馈线屏里电缆接地比较常见,但此处的接地点不容易被发现?</p> <p style="text-indent:2em;"> 4.接线错?</p> <p style="text-indent:2em;"> 1?接线错误导致保护拒动 </p> <p style="text-indent:2em;"> 2?接线错误导致保护误动 </p> <p style="text-indent:2em;"> 5.抗干扰性能?</p> <p style="text-indent:2em;"> 运行经验证明晶体管保护、集成电路保护以及微机保护的抗干扰性能与电磁型、整流型的保护相比较差。集成电路保护的抗干扰问题最为突出,用对讲机在保护屏附近使用,可能导致一些逻辑元件误动作,甚至使出口元件动作跳闸?</p> <p style="text-indent:2em;"> 在电力系统运行中,如操作干扰、冲击负荷干扰、变压器励磁涌流干扰、直流回路接地干扰、系统和设备故障干扰等非常普遍,解决这些问题必须采取抗干扰措施?</p> <p style="text-indent:2em;"> 6.误碰与误操作的问题 </p> <p style="text-indent:2em;"> 1?带电拔插件导致的保护出口动作 </p> <p style="text-indent:2em;"> 保护装置在运行中出现问题时,若继电保护人员带电拔插件,容易使保护装置的逻辑造成混乱,造成保护装置出口动作?</p> <p style="text-indent:2em;"> 2)带电事故处理将电源烧坏 </p> <p style="text-indent:2em;"> 工作人员在电源插件板没有停电的情况下,拔出插件进行更换,容易使电源插件烧坏?</p> <p style="text-indent:2em;"> 7.工作电源的问题 </p> <p style="text-indent:2em;"> 1?逆变稳压电源 </p> <p style="text-indent:2em;"> 逆变稳压电源存在的问题: </p> <p style="text-indent:2em;"> ①、波纹系数过高,可能造成逻辑的错误,导致保护误动作。要求将波纹系数控制在规定的范围以内?</p> <p style="text-indent:2em;"> ②、输出功率不足。电源的输出功率不够,会造成输出电压的下降,如果下降幅度过大,导致比较电路基准值的变化,充电电路时间变短等一系列的问题,影响到逻辑配合,甚至逻辑判断功能错误?</p> <p style="text-indent:2em;"> ③、稳压性能差。电压过高或过低都会对保护性能有影响?</p> <p style="text-indent:2em;"> ④、保护问题。电压降低或是电流过大时,快速退出保护并发出报警,可避免将电源损坏。但电源保护误动作时有发生,这种误动作后果是严重的,对无人值班的变电站危害更大?</p> <p style="text-indent:2em;"> 2?电池浮充供电的直流电?</p> <p style="text-indent:2em;"> 由于充电设备滤波稳压性能较差,所以保护电源很难保证波形的稳定性,即纹波系数严重超标?</p> <p style="text-indent:2em;"> 3?UPS供电的电?</p> <p style="text-indent:2em;"> 在分析对保护的影响时应考虑其交流成分、电压稳定能力、带负荷能力等问题?</p> <p style="text-indent:2em;"> 4?直流熔丝的配置问?</p> <p style="text-indent:2em;"> 直流系统的熔丝是按照从负荷到电源一级比一级熔断电流大的原则设置的,以保证回路上短路或过载时熔丝的选择性,若熔丝配置混乱,其后果是回路上过流时熔丝越级熔断?</p> <p style="text-indent:2em;"> 8.TV、TA及二次回路的问题 </p> <p style="text-indent:2em;"> 1?TV二次的问?</p> <p style="text-indent:2em;"> ?TV二次保险短路故障?</p> <p style="text-indent:2em;"> ?TV二次开路故障?</p> <p style="text-indent:2em;"> 2?TA二次的问?</p> <p style="text-indent:2em;"> ?因TA端子松动,使母差保护不平衡电流超标; </p> <p style="text-indent:2em;"> ②TA二次开路造成保护装置死机?</p> <p style="text-indent:2em;"> 9.保护性能的问?</p> <p style="text-indent:2em;"> 一是性能方面的问题,即装置的功能存在缺陷;二是特性方面的问题,即装置的特性存在缺陷?</p> <p style="text-indent:2em;"> 1?保护性能问题的实?</p> <p style="text-indent:2em;"> ?变压器差动保护躲不过励磁涌流?span id="sTxtPage" style="color:#FF0000;"></div><div id="" class="meneame"><span class="disabled">< </span><span class="current">1</span> <a href="AD100862782_2.html">2</a></div> <div id="" style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="关注有惊?" /></div> <div id="" class="news_bot_mes">中国工业电器网:此内容转载于合作媒体或互联网其它网站,中国工业电器网登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述!</br>新闻、技术文章投稿QQ?28246603 邮箱:news@cnelc.com</div> <h2 class="related">相关阅读</h2> <ul class="related_con"> <li>· <a href="/text/9/181019/AD100862782_1.html" target="_blank">继电保护各类故障分析及故障举?/a></li><li>· <a href="/text/32/181019/AD100862781_1.html" target="_blank">电气百科:heroes截止阀长时间使用时</a></li><li>· <a href="/text/32/181019/AD100862780_1.html" target="_blank">电气百科:小型喷雾干燥机蠕动泵的维护及保</a></li><li>· <a href="/text/32/181019/AD100862778_1.html" target="_blank">电气百科:紫外灯老化试验机常见故障的解决</a></li><li>· <a href="/text/1/181019/AD100862777_1.html" target="_blank">京东物流进军“个人快递”,并发布全球智?/a></li><li>· <a href="/text/32/181019/AD100862776_1.html" target="_blank">电气百科:低噪音空气泵注意事?/a></li><li>· <a href="/text/32/181019/AD100862775_1.html" target="_blank">电气百科:便携式地磅注意事项日常维护</a></li><li>· <a href="/text/1/181019/AD100862774_1.html" target="_blank">电气百科:并联电抗器现场技术问答知识点</a></li> </ul> </div> <!-- comments begin --> <div id="" class="comments"> <h4>网友评论<span>已有<span id="PeNum" style="float:left;"></span>人参与评?img src="/images/temp/comments.gif" width="65" height="20" onclick="HrefComment()" /></span></h4> <p style="padding-left:100px; 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