简介:摘要变压器的温度会受到各种因素的影响,如果变压器一直处于高温负荷状态,那么变压器中的上层油温会不断上升,最终达到甚至超过规定的限值。当变压器自身的降温散热方式无法达到降温的效果时,就需要借助临时辅助降温技术来控制变压器温度。本文主要将常用的临时辅助降温方法与喷淋辅助降温技术进行分析。
简介:摘要:随着电网规模的不断扩大,配网设备对电能质量的要求越来越高,其中变压器的使用频率更高。随着配电网规模的不断扩大,由于配电变压器工作环境恶劣,在运行中,变压器长期处于高负荷状态,可能会发生绝缘老化失效,导致变压器外壳出现划痕和松动等现象,如果在进行拆卸过程中不慎或发生故障无法进行维修操作,会对供电线路造成严重的影响。因此必须对变压器进行防腐处理和更换套管螺母。同时如果不对外壳进行处理,将会使内部的绝缘下降和变压器短路而发生爆炸等事故。套管螺母锈蚀会对配电变压器本身造成严重损伤,导致短路故障或绝缘失效而发生事故,因此更换损坏的变压器已成为配电变压器管理中必不可少的重要工作[1]。
简介:Capabilitiesofgas-analyticaltransformerdiagnosticstoclearupfailures,CapacitychangeofsolidinsulatorsundertheinfluenceofAChighvoltage,Chargeaccumulationcausedbystreamingelectrificationintransformeroil,Comparisonofdifferentneuralnetworksalgorithmsusedinthediagnosisandthermalageingpredictionoftransformeroil,ConductionofWaterClustersinModifiedAgedOil,DechlorinationofPolychlorinatedBiphenylsinIndustrialTransformerOilbyRadiolyticandPhotolyticMethods。
简介:Anumericalapproachtotheevaluationofuncertaintyinnonconventionalmeasurementsonpowersystems,Asimplemethodforcalculatingwindingtemperaturegradientinpowertransformers,Ageingandlife-managementofpowertransformers,Aninvestigationintotheinternalovervoltagesgeneratedbydisconnectorsingasinsulatedsubstations
简介:ApplicationofZig-ZagTransformersinaThree-wireThree-phaseDynamicSagCorrectorSystem,ApplyingTransformerConcepttoNon-isolatedVoltageRegulatorsSignificantlyImprovestheEfficiencyandTransientResponse,BDVRTECHNOLOGY-AMULTIFUNCTIONRIDE-THROUGHSYSTEMFORADJUSTABLESPEEDDRIVESOFCRITICALLOADS,Bi-directionalsingle-phasehalf-bridgerectifierforpowerqualitycompensation,ChoiceofUtilityFunctionsforAdaptiveCriticDesigns,CompactDSPApplicationforalOOkWDCPowerSupply,ComparisonaboutFiveCandidatesfor12VVRMTopology。
简介:ADC/ACconverterforsingle-phasegrid-connectedphotovoltaicsystems-IECON'02;ANEWZVTDC-TO-DCFULLBRIDGECONVERTER;AThree-PhaseAC/ACHigh-FrequencyLinkMatrixConverterforVSCFApplications;Analysisofeffectiveresistanceandeddy-currentlossesinmultiturnwindingofhigh-frequencymagneticcomponents;Bi-polarityphase-shiftedcontrolledvoltagemodeAC/ACconverterswithhighfrequencyaelink;Contactlesspowerandinformationtransmission;