高压电器2017，Vol.53Issue(11)：109-114,6.DOI:10.13296/j.1001-1609.hva.2017.11.018
高速气流对环氧树脂车顶绝缘子电痕深度影响的研究
Effects of Speedy Airflow on Trace Depth of Roof Epoxy Insulator
摘要
Abstract
Regarding the insulation performance degradation of the epoxy insulators on roof of high-speed trains due to surface discharge,a fluid model and a three-dimensional nonlinear transient electric-thermal coupling model of roof insulator for pantograph are established with the software Ansys to analyze the airflow and pressure distributions around the insulator,the variation of trace depth with airflow velocity and pressure in circumferential direction and along the creeping distance,and the effect of train speed on trace depth.The results show that:1)the movement of the train make airflow pressure distort,forming an uneven distribution;2)the trace depth is small in crosswind area but large in windward and leeward areas,where the minimum depth is in 50° direction of the crosswind area and the maximum depth is in 180° of the leeward area,and the trace depth is small on skirt edge but large on jacket;and 3)With train speed increasing,the trace depth slowly declines at first then decreases rapidly and returns to slow decline in the end,where the fastest decline rate of the trace depth appears in crosswind area,and the decline rate is higher in windward area than in the leeward area.关键词
车顶绝缘子/环氧树脂/电痕深度/高速气流/爬电距离Key words
roof insulator/epoxy/trace depth/speedy airflow/creeping distance引用本文复制引用
包健康,张血琴,高波,吴广宁..高速气流对环氧树脂车顶绝缘子电痕深度影响的研究[J].高压电器,2017,53(11):109-114,6.基金项目
国家自然科学基金项目(U1234202,51507146).Project Supported by National Natural Science Foundation of China(U1234202,51507146). （U1234202,51507146）
