分段电弧模型下VFTO的计算与分析  

Calculation of Very Fast Transient Over-Voltage on the Condition of Segmental Arcing Model

作　　者：孟涛[1] 林莘[1] 徐建源[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110178

出　　处：《电工技术学报》2010年第9期69-73,共5页Transactions of China Electrotechnical Society

基　　金：教育部高等学校科技创新工程重大项目培育资金(707018);辽宁省教育厅优秀人才(2006R40);辽宁省教育厅科学技术研究(2008T134)资助项目

摘　　要：在快速暂态过电压(VFTO)的计算过程中,气体绝缘变电站(GIS)设备模型的选取直接影响计算结果的准确程度,其中隔离开关的电弧模型尤为重要。根据分布参数理论与电弧的动态物理过程,以及目前常用的两种电弧模型,提出了三段式的分段电弧模型,并结合某550kV电站的实际电路,详细计算了在三种电弧模型条件下GIS内部的VFTO,同时研究了不同电弧模型对GIS内部元件处VFTO极值、频谱特性及上升陡度的影响。结果表明,分段电弧模型能够较为准确地模拟隔离开关电弧的物理过程,对于VFTO的数值计算与特性分析是实用的。In computational process of very fast transient over-voltage,it is essential to find the exact model of the SF6-gas insulated substation. The arcing model of disconnector is particularly important. In the paper,the segmental arcing model,based on the distributed parameter theory and the physical process of arc,is proposed in comparison with the common arcing model in the nowadays. Moreover combined with a 550kV station and utilized the Fortran language and Matlab program,the VFTO is simulated in detail under the condition of varied arcing models. It is indicated that the physical process of arc is modeled precisely by the segmental arcing model. And it is useful during the calculation of VFTO.

关 键 词：隔离开关 电弧模型 气体绝缘变电站 快速暂态过电压 

分 类 号：TM501[电气工程—电器]