简介:Anumericalapproachtotheevaluationofuncertaintyinnonconventionalmeasurementsonpowersystems,Asimplemethodforcalculatingwindingtemperaturegradientinpowertransformers,Ageingandlife-managementofpowertransformers,Aninvestigationintotheinternalovervoltagesgeneratedbydisconnectorsingasinsulatedsubstations
简介:1ATMSUBCOOLEDLIQUIDNITROGENCRYOGENICSYSTEMWITHGM-REFRIGERATORFORAHTSPOWERTRANSFORMER;Acontactlesselectricalenergytransmissionsystemforportable-telephonebatterychargers;Acurrent-basedsolutionfortransformerdifferentialprotection-PartⅡ:relaydescriptionandevaluation;Aforwardconvertertopologyemployingaresonantauxiliarycircuittoachievesoftswitchingandpowertransformerresetting;Anewmethodbasedonwaveletpackettransformationtoreducenarrowbandnoiseinon-sitePDmeasurement;ANewMethodfortheCalculationoftheHot-SpotTemperatureinPowerTransformersWithONANCooling;
简介:Analyticalmodelofironlossesinpowertransformers,ANN-basedharmonicrestraintdifferentialprotectionofpowertransformer,Applicationofradialbasisfunctionneuralnetworkfordifferentialrelayingofapowertransformer,Automaticdiagnosisoffaultlocationsinpowertransformerimpulsetestusingself-organizingmap,Back-upalgorithmforsinglepowerdistributiontransformercontingency,Chaosinpowertransformersincludingthecorehysteresis,Characterizationofvibrationsignalsusingcontinuouswavelettransformforconditionassessmentofon-loadtap-changers。
简介:摘要本文从非晶合金变压器的目前的状况和发展情况出发,随后阐述了非晶合金变压器的种类和特点,分析了目前推广非晶合金变压器的原因和有利条件,并指出阻碍其推广使用的问题。非晶合金变压器由于非晶材料的特殊性能,它比传统用硅钢片作为铁心的变压器空载损耗下降70%以上,空载电流下降约80%,是目前节能效果较理想的配电变压器,特别适用于农村电网和发展中地区等负载率较低的地方,这对于节约能源,响应国家的节能降耗政策是一个很好的设备。但同时非晶合金变压器在噪音、机械强度、抗短路能力等方面的问题又阻碍它的推广使用。随后本文还讨论非晶合金变压器的节能性,经济性和环保性,以及非晶合金变压器和传统变压器的不同之处和优缺点。