重庆大学学报：自然科学版2011，Vol.34Issue(7)：69-75,7.
110kV电压互感器瓷套交流冰闪特性及防冰闪措施
AC icing flashover performance of 110 kV potential transformer and the measures of anti-icing flashover
摘要
Abstract
The AC flashover performance of 110 kV iced potential transformer is investigated by testing in laboratory to analyze the influence degree of icing on the safe and reliable operation of power system.The results show that the AC flashover voltage of 110 kV iced potential transformer decreases with the ice amount increasing.The relation between icing flashover voltage and ice amount accords with the negative exponential function law,and the characteristic index is in the range of 0.085~0.100.Meanwhile,the relation between icing flashover voltage and ice thickness accords with the negative power function law,and the characteristic index is in the range of 0.40~0.55.The flashover voltage of 110 kV iced bushing is related to the pollution before icing.The relation between icing flashover voltage and salt deposit density（SDD） accords with the negative power function law,and the characteristic index is in the range of 0.21~0.26.When the ice thickness is up to 25 mm and SDD is 0.08 mg/cm2 and above,the icing flashover occurs on the 110 kV potential transformer in service.The effective measures to prevent AC icing flashover of 110 kV potential transformer are to increase the height of the structure and install creepage extenders.The results can offer consults for the external insulation selection and design of substation in ice covered regions.关键词
互感器/交流/覆冰/闪络/增爬裙/防冰闪措施Key words
transformer/AC/ice/flashover/creepage extenders/measure of anti-icing flashover分类
信息技术与安全科学引用本文复制引用
张志劲,蒋兴良,胡建林,陈凌,刘兵,黄海舟..110kV电压互感器瓷套交流冰闪特性及防冰闪措施[J].重庆大学学报：自然科学版,2011,34(7):69-75,7.基金项目
国家重点基础研究发展计划资助项目 （）
国家自然科学基金青年基金资助项目 （）
