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</li> <li> <a id="ctl00_ProductClass_ProductClassRepeater_ctl167_Title" title=" 轴承感应加热器" class="maxLen" href="/pddetailthree/product/category-2949820-1.html" style="width:130px;"> 轴承感应加热器</a> </li> <li> <a id="ctl00_ProductClass_ProductClassRepeater_ctl168_Title" title="各种数字电桥" class="maxLen" href="/pddetailthree/product/category-2952893-1.html" style="width:130px;">各种数字电桥</a> </li> <li> <a id="ctl00_ProductClass_ProductClassRepeater_ctl169_Title" title=" 氧化锌避雷器" class="maxLen" href="/pddetailthree/product/category-2953156-1.html" style="width:130px;"> 氧化锌避雷器</a> </li> <li> <a id="ctl00_ProductClass_ProductClassRepeater_ctl170_Title" title=" 万能检测仪器" class="maxLen" href="/pddetailthree/product/category-2953580-1.html" style="width:130px;"> 万能检测仪器</a> </li> </ul> </div> <div id="n8qttzop7xpq" class="rightcontent"> <div id="n8qttzop7xpq" class="images20"> 技术文章 </div> <div id="n8qttzop7xpq" class="commontext hiddenRolling" style="text-align: center;"> <span id="ctl00_ArticleInfo_ArticleTitleLabel"><h1>微机继电?；さ脑硖氐?/h1></span> </div> <div id="n8qttzop7xpq" class="commontext hiddenRolling"> <span id="ctl00_ArticleInfo_ArticleInfoLabel" class=" yzeditor" style="WORD-BREAK: normal"><p><strong><span style="font-size: 18px">微机继电?；?/span></strong><span style="font-size: 18px">的原理特点</span></p><p><span style="font-size: 18px"><br /><strong>微机继电?；?/strong>的原理特点</span></p><p><span style="font-size: 18px"><br /> 假定输入信号中含有非周期分量、基波和高次谐波。这些算法本身具有很强的滤去高次谐波的功能，因此无需另设数字滤波器，但对非周期分量必须采取其他措施。由于电力系统中大量应用铁磁非线性元件，输电线路分布电容和串联、并联电容，以及电压互感器、电流互感器的暂态特性等因素的影响，使<strong>微机继电保护</strong>输入信号中还含有许多随机高频分量，它们起着干扰或噪声的作用。对此，可采用*小二乘曲线拟合算法或对计算结果采取平滑措施。上述种种算法都是先算出电压、电流的大小和相位，然后根据?；さ亩髋芯葑鹘徊降脑怂?，*终实现其?；すδ堋?/span></p><p><span style="font-size: 18px"> 也有一些算法将电量运算与?；ざ髋芯菰怂阒苯咏岷显谝黄穑缬美肷⒅抵苯邮迪值姆较蜃杩辜痰缙鞯乃惴?。实现以某种频率的正弦电量为基础的<strong>继电保护</strong>原理,必须将经A/D变换后的数字量再经一次滤波。由于数字滤波器精度高、可靠而且调整灵活，通过时分复用可使装置简化，因此微机?；ぶ衅毡椴捎檬致瞬ㄆ?。数字滤波器本身可理解为一个计算程序或算法，它将代表输入信号的数字时间序列转换为代表输出信号的数字时间序列，使信号按照预定的形式变化。微机继电保护中应根据电力系统信号的特点和?；ぴ淼囊笊杓啤⒀≡裣嘤Φ氖致瞬ㄆ?。数学滤波器的主要性能指标是频域特性、时延和计算量。</span><br /> </p><div id="n8qttzop7xpq" class="datumrelate">上一篇：<a href="/pddetailthree/tech/detail-886321.html">继电?；げ馐砸枪ぷ髟砑坝τ?/a><br />下一篇：<a href="/pddetailthree/tech/detail-886310.html">阐述六相微机继电保护测试仪特点及参数</a></div></span> </div> </div> </div> <div id="n8qttzop7xpq" class="classcontent"> <div id="n8qttzop7xpq" class="images51_2"> </div> <div id="n8qttzop7xpq" class="images54_2"> </div> </div> <div id="n8qttzop7xpq" class="PageTemplateControl_5" id="id_PageTemplateControl_7_container"> <div id="n8qttzop7xpq" class="share_PageTemplateControl_7_1" id="id_PageTemplateControl_7_0_container"> <div id="n8qttzop7xpq" class="bSubCon"> <div class="n8qttzop7xpq" 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