SST中辅助电源变压器的绝缘结构设计

打开文本图片集

中图分类号：TM41 文献标志码：A 文章编号：2095-2945（2025）19-0048-05

Abstract：Withtheimprovementofvoltagelevels，theinsulationproblemsofauxiliarypowertransformersusedfor independentpowersupplyinSolidStateTransformers（SSTs）havebecomeincreasinglyprominent.Iftheinsulationisnotproperly designed，seriouspartialdischargeswillbecausedresultinginisulationagingfailureandaffectingtheoraloperationof electricalequipment.Tothisend，theauthorhaveproposedatechnicalsolutionusingacombinationofmetalshieldedinsulated wiresandmagneticringsintheband.Itcannotonlyhomogenizetheelectricfielddistributionandincreasethelevelofpartial discharge，butalsoreducethevolumeocupiedbythetransformerandimprovethepowerdensityofthesystem.Bycomparing andanalyzingthecharactersticsoftheproposedauxiliarypowertransformerandtheexisting primaryauxiliarypowertransformer intermsofelectricfielddistributionandvolumeocupation，theproposedschemehasbeeverfiedintermsofoptimizingthe electric field distribution（reducing the maximum electric field value by 65 % ）and reducing the transformer volume（saving the occupied space and volume by about 1/3 ）

Keywords：solidstate transformer，insulationstructure;auxiliarypowersupply；transformer;electricfielddistribution

固态变压器（Solid State Transformer，SST），亦称电力电子变压器（PowerElectronicTransformer，PET），是一种融合电力电子技术与高频变压器的新型电力电子设备，兼具电气隔离、电压变换及功率调节与控制等多重功能优势[I-3]。（剩余4390字）