(晋城供电公司山西省晋城048000)
摘要:运行中的全封闭气体绝缘高压设备组合电器(GIS),由于内部导电杆电流磁场的电磁感应,在GIS外壳产生环流和涡流,会产生功率损耗,使得GIS外壳或其他零部件发热,本文应用电磁式电流互感器原理及其误差公式分析了GIS外壳环流的机理及现象,且应用互感器原理粗略计算了环流及其损耗,本方法机理简洁清晰,可用于计算感应电流及其损耗。计算表明GIS设备外壳分段绝缘是一种很好的解决方法。
关键词:全封闭气体绝缘高压设备组合电器(GIS);外壳;环流;损耗;分段绝缘
SimplifiedAnalysisandcalculationonCirculatingCurrentandPowerLossinEnclosureofGISBasedonPrincipleofCurrentTransformer
ZHOULin-wei
Abstract:thecirculatingcurrentandeddycurrent,inducedbyelectromagnetintheAContheconductorpolefixedintheenclosureGIS,cangeneratesomepowerloss.andheatonthemedalshellandothercomponents,Bytheprincipleofelectro-magneticcurrenttransformeranderrorcalculationequation,weanalyzedthephysicalphenomenonofthecirculatingcurrentintheenclosureofGIS,andsimplycalculatedthecirculatingcurrentanditspowerlossintheenclosure.Meanwhile,wediscussedtheinfluencesofcirculatingcurrentanditspowerlossontheoperationofGISandearthwire.Thecomputaionshowsthatsectionalinsulationshellisagoodsulation.
Keywords:GIS;medalshell;circulatingcurrent;powerloss;sectionalinsulation