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<h1 class="h1">柴油发电机并机差频电压原理及怎样获取</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2025-11-28　　访问量:51</div>
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<p>由人员进行并机使用时，通过观察仪表来检测并列条件。自动装置如何检测并机条件，特别是频率要素和相位因素<a href="http://www.szkcfdj.com" target="_blank">重庆康明斯发电机官网</a>，显然要找到一种能反映并联条件的信号<a href="http://www.szkcfdj.com" target="_blank">康明斯发电机组价格一览表</a><a href="http://www.szkcfdj.com" target="_blank">康明斯发电机生产厂家</a>，为此，首先引入差频电压的概念。</p><p>差频电压是指待并发电机电压与电网电压，在幅值相等的因素下，而频率存在区别时的这两个交流电压的差值信号。较简易的差频电压波形是直接合成的差频正弦波。YGb柴油发电机组_康明斯柴油发电机-重康动力</p><p>式中，Ug、Un分别为待并发电机电压和市电电压的高效值；ωg、ωn分别为待并发电机电压和电网电压的角频率；分别为发电机电压和电网电压的初相角。YGb柴油发电机组_cummins柴油发电机-重康动力</p><p>若将这两个电压经变压器进行相减，就能得到差频正弦波，如图1和图2所示。为简便起见，设变压器的变比为1：1。YGb柴油发电机组_康明斯柴油发电机-重康动力</p><p>&nbsp;从图1可见，Ud电压为 ug与 un瞬时值之差。若 ωBω，2U=2Un=Um，则差频电压为YGb康明斯发电机组_康明斯柴油发电机-重康动力</p><p>&nbsp; &nbsp; &nbsp; &nbsp;YGb康明斯发电机组_康明斯柴油发电机-重康动力</p><p>从差频电压 ud的表达式中可以看出，ud是一个幅值，即YGb康明斯发电机组_cummins柴油发电机-重康动力</p><p>以角转速(ωg-ωn)/2作正弦规律变化的调制电压，如图2(c)所示。YGb康明斯发电机组_康明斯柴油发电机-重康动力</p><p>在自动并机控制中需要差频电压包络线的瞬时值，它是将ud整流（取绝对值）、滤波（去掉高频(ωg+ωn)/2的成分）后的输出电压，称为差频脉动电压（图2）），并用ūd表示，即YGb康明斯发电机组_康明斯柴油发电机-重康动力</p><p>由相量图3也可求得差频电压。即按图中直角三角形关系得出YGb康明斯发电机组_康明斯柴油发电机-重康动力</p></div><a href="http://www.szkcfdj.com/" target="_blank">http://www.szkcfdj.com</a>
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