用三支路法分析高压电气设备的tgδ  

Tgδ Analysis for High Voltage Equipments by Three-Branch Method

作　　者：刘炳尧[1] 江荣汉[1] 

机构地区：[1]湖南大学电气工程系

出　　处：《湖南大学学报（自然科学版）》1995年第6期99-104,108,共7页Journal of Hunan University:Natural Sciences

基　　金："八五"攻关课题

摘　　要：用三支路法在理论和实际两方面研究了电介质或电气设备绝缘的损耗因素，即介质损耗角正切，该法直接利用区分电导损耗和极化损耗的三条支路，从ｔｇδ的物理含义出发，推导了单层介质和双层介质的综合ｔｇδ表达式，给出了ｎ层串联介质的ｔｇδ表达式，并结合具体问题进行了讨论，该研究尤其适宜于有多层介质相串联的电容型产品，可用来说明电流互感器的ｔｇδ“回升”现象。The loss tangent of the dielectric or the insulation of the electrical equipments is studied using the three-branch method theoretically and practically. Based onthe physical definition we use three branches which express the conductive loss and polarization loss,deduce the synthetic formula of tlie tgδ for single-layer and multilayer dielectric,give the expression of the tgδ for n-layer series dielectric and discuss them com-bining concrete problems. This method is suitable for capacitance-type equipments specially and is also suitable for explaining the “retrace”phenomena of the capacitance current transformers.

关 键 词：三支路法 高电压 电气设备 损耗因数 

分 类 号：TM81[电气工程—高电压与绝缘技术]