超高压直流输电线路故障测距原理研究及软件开发.docx

超高压直流输电线路故障测距原理研究及软件开发
Abstract
Withtheincreasingdemandforelectricity,highvoltageandultra-highvoltagedirectcurrenttransmissionlinesareplayinganincreasinglyimportantroleinpowertransmission.However,faultsinthesetransmissionlineswillseriouslyaffectthestabilityandreliabilityofthepowergrid.Thedistancemeasurementoftransmissionlinefaultsprovidesanimportantbasisfortimelyandaccuratetroubleshooting.Thispaperstudiestheprinciplesoffaultdistancemeasurementforultra-highvoltagedirectcurrenttransmissionlinesanddevelopscorrespondingsoftwareforpracticalapplication.
Introduction
Asakeycomponentofthemodernpowersystem,ultra-highvoltagedirectcurrenttransmissionlineshavetheadvantagesoflongtransmissiondistance,largetransmissioncapacity,andlowloss,andhavebeenwidelyusedinpowertransmission.However,duetovariousreasonssuchaslightningstrikes,insulationaging,andequipmentfailures,transmissionlinefaultsareinevitableinactualoperation,whichseriouslyaffectsthestabilityandreliabilityofthepowergrid.Therefore,itisnecessarytoquicklyandaccuratelylocatethelocationofthefaultafterthefaultoccurs,soastominimizetheimpactofthefaultonthepowergrid.
Faultlocationmainlyincludestwotypes:distancemeasurementandanglemeasurement.Faultdistancemeasurementisthemostcommonlyusedmethodbecauseitissimpleandpractical,anditsaccuracyisalsohigh.Theultra-highvoltagedirectcurrenttransmissionlinehasaverycomplexstructure,andthefaultdistancemeasurementmethodisdifferentfromthatoftraditionalalternatingcurrenttransmissionlines.Atpresent,manyscholarshavecarriedoutresearchonthefaultdistancemeasurementmethodofultra-highvoltagedirectcurrenttransmissionlines,andhavemadesignificantprogressinpractice.
Intheprocessoffaultdistancemeasurementforultra-highvoltagedirectcurrenttransmissionlines,softwaredevelopmentisveryimportant.Itcanhelppowergridpersonnelquicklyandaccuratelylocatethefaultthroughcomputersimulationmodelingandcalculation,whichisofgreatpracticalsignificance.
PrinciplesofFaultDistanceMeasurementforUltraHighVoltageDirectCurrentTransmissionLin