摘要
兰新线风沙环境影响动车组车顶绝缘子表面污秽分布,污秽在湿润气候条件下可致使动车组发生"趴窝"故障。为此在闭式风洞内试验分析时速200 km/h工况下积污时间对动车组车顶环氧树脂绝缘子表面污秽分布的影响规律。结果表明:绝缘子表面污秽呈现出扇形不均匀分布,背风面污秽密度值最大,除7号伞外,上表面污秽密度大于下表面;积污时间在2~20 h变化过程中,伞上表面背风面污秽密度随积污时间的延长而增加,污秽密度在积污时间为20 h时趋于饱和,值为5.6 mg/cm^2;以背风面污秽密度为基准,积污持续时间越长,迎风面及侧风面伞裙上表面污秽密度同背风面污秽密度相对比值越小。该研究结果可为兰新线风沙环境条件下绝缘子闪络试验模拟及结果优化设计提供依据。
Sand environment along Lanzhou-Xinjiang high-speed affects the contamination distribution on the roof insulator surface of electric multiple units(EMU), which can result in EMU ‘break down’ faults under humid climate conditions. In a closed wind tunnel, the contamination time on the surface contamination distribution of the EMU roof epoxy resin insulator at the speed 200 km/h were experimentally investigated. The results show that, the contamination distribution on insulator surfaces tends to be in fan-shaped non-uniform distribution, leeward contamination density is the heaviest, and the contamination density of top surface is greater than that of the bottom except the 7th sheath. From 2 h to 20 h, the top surface contamination density of the leeward side increases with the contamination time increasing. When the time is 20 h, the pollution density tends to be saturated and the value can be up to 5.6 mg/cm^2. When the leeward side number is taken as a reference, the ratio of the windward and the crossward side density to the leeward side becomes smaller with a prolongated contamination duration. The research results can provide the basis for insulator flashover tests and insulator structure optimization design under the wind sand environment of Lanzhou-Xinjiang high speed railway.
作者
马建桥
孙振龙
律方成
陈坤
何一川
田铭兴
MA Jianqiao;SUN Zhenlong;LU Fangcheng;CHEN Kun;HE Yichuan;TIAN Mingxing(College of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,China;Rail Transit Electrical Automation Engineering Laboratory of Gansu Province,Lanzhou 730070,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第3期1005-1012,共8页
High Voltage Engineering
基金
国家重点研发计划(2016YFB1200403)
甘肃省教育厅项目资助计划(2018A-025)
国家自然科学基金(51767014,51867013)
甘肃省科技计划(17JR5RA083).
关键词
动车组
环氧树脂绝缘子
高速气流
污秽分布
风洞试验
electric multiple units
epoxy insulator
high speed airflow
pollution distribution
wind tunnel experiment
作者简介
通信作者:马建桥,1982—,男,博士,副教授,主要从事电气设备绝缘、电气化铁路接触网、动车组绝缘设备优化设计等方面的研究,E-mail:gndxmajq@126.com
