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1、变压器励磁涌流产生机理及抑制措施探讨中英文对照TransformerexcitationinrushcurrentmechanismandsuppressionmeasurestoexplorecontrastinbothChineseandEnglish摘要:变压器作为交流电力系统重要的电气设备,其正常运行直接关系着系统的安全。差动保护作为变压器主保护,励磁涌流是影响其正确动作与否的关键因素之一。文章分析了变压器励磁涌流及其特点,以单相变压器为例,分析了励磁涌流产生的机理,并给出了常见的抑制措施。Abstract:transformerasanim
2、portantofcommunicationpowersystemelectricalequipment,thenormaloperationofthesystemhasacloserelationshipwithsafety.Differentialprotectionfortransformermainprotection,excitationinrushcurrentisoneofthekeyfactorsaffectingthecorrectoperationornot.Excitationinrushcurrentoftransformer
3、isanalyzedanditscharacteristicsofasingle-phasetransformerasanexample,analyzedthemechanismofexcitationinrushcurrent,andtheinhibitionofcommonmeasuresisgiven. 关键词:变压器励磁涌流二次谐波间断角Keywords:transformerexcitationinrushcurrentsecondharmonicdiscontinuousAngle 1、变压器励磁涌流及特点1,transformere
4、xcitationinrushcurrentandthecharacteristic 变压器是一种依据电磁感应原理制造而成的静止元件,是交流输电系统中用于电压变换的重要电气设备。当合上断路器给变压器充电时,有时候,能够观察到变压器电流表的指针有很大摆动,随后,很快又返回到正常的空载电流值,这个冲击电流通常就被称为励磁涌流。Transformerisakindofbasedonelectromagneticinductionprincipleandstaticelement,isusedinactransmissionsystemvoltagetra
5、nsformationoftheimportantelectricalequipment.Whenclosethecircuitbreakertochargingtransformer,sometimes,canbeobservedintransformerammeterpointerhasgreatswing,thenquicklyreturntonormalno-loadcurrentvalue,theimpactcurrentisusuallyreferredtoastheexcitationinrushcurrent. 总的来说,变压器励磁
6、涌流有以下几个特点:第一,波形呈现尖顶形状,表明其中含有相当成分的非周期分量和高次谐波分量,其中高次谐波以二次和三次为主,并且,随着时间推移,某一相二次谐波含量可能超过基波分量的一半以上。第二,励磁涌流幅值与变压器空载投入的电压初相角直接相关。对于单相变压器来说,当电压过零点投入时,励磁涌流幅值最大。由于三相变压器各相间有120度相位差,所以涌流也不尽相同。第三,在最初几个波形中,涌流将出现间断角。第四,涌流衰减的时间常数与变压器阻抗、容量和铁心材料等都相关。Transformerexcitationinrushcurrent,onthewhole,
7、havethefollowingcharacteristics:first,thewaveforminspireshape,thatitcontainsquitetheaperiodiccomponentandhighharmoniccomponents,thehighharmonicsisgivenprioritytowithtwotimesandthreetimes,and,overtime,thesecondharmoniccontentcouldbemorethanonephaseofthefundamentalcomponentformor
8、ethanhalf.Second,excitationinrushcurrentamplitudeisdir