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交流滤波器最后断路器动作分析.docx

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交流滤波器最后断路器动作分析 Introduction Inelectricalpowersystems,communicationfiltersareusedtosuppresselectromagneticinterference(EMI)generatedbyradiofrequency(RF)communicationequipment.Communicationfiltersareusedtoseparatethecommunicationsignalsfromthepowersystemsignalsinordertoensurereliablecommunicationbetweendifferentdevices.Breakersareimportantprotectivedevicesinelectricalpowersystems,responsibleforinterruptingthefaultcurrentsthatmayoccurduringanelectricalfaultorevent.However,itisimportanttoanalyzethedynamicsofthecommunicationfiltersandthebreakersinordertounderstandhowtheyinteractandaffecteachotherduringafault.Thispaperdiscussestheanalysisofthedecommissioningofcommunicationfiltersandbreakersinelectricalpowersystems. CommunicationFilters CommunicationfiltersarepassivedevicesthatareusedtosuppressunwantedRFsignalswhileallowingdesiredsignalstopassthrough.Theyaretypicallypassive,consistingofinductors,capacitors,andresistorsthataredesignedtofilterspecificfrequencies.TheyareappliedtoRFcommunicationequipmentsuchasmodems,radios,andtelevisionstosuppressanynoisethatcouldinterferewiththecommunicationsignals.Communicationfilterscanalsobeusedinpowersystems,wheretheyareappliedtoprotectelectronicequipmentfromthepowersystemnoise. Breakers Breakersorcircuitbreakersareprotectivedevicesthatareusedtointerrupthighcurrentfaultsinelectricalpowersystems.Thebreakingoperationofabreakerinvolvesopeningthecontactsofthebreakertointerruptthecurrentflow.Theyareusedtoprotectdevicesandequipmentbydetachingthemfromthefaultcurrentbeforeitcancauseanydamage.Atypicalbreakercontainsamechanicalswitchandatrippingmechanismwhichcouldbeathermalbimetallicstriporanelectromagnet. InteractionofCommunicationFiltersandBreakers Communicationfiltersandbreakersarebothusedinelectricalpowersystems,andtherefore,theyinteractwitheachotherduringafaultcondition.Theinteractionbetweencommunicationfiltersandthebreakersisduetothefaultcurrentsflowingthroughthecommunicationfilters,whichcancauseproblemssuchasthecommunicationfiltersmalfunctio