高速铁路电分相电弧运动发展规律研究  

Research on the Development Laws of Articulated Phase Insulator Arc Movement in High-speed Railway

作　　者：韩正庆[1] 陈晨旭 沈睿 刘淑萍[1] 高仕斌[1] HAN Zhengqing;CHEN Chenxu;SHEN Rui;LIU Shuping;GAO Shibin(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan Province,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市611756

出　　处：《中国电机工程学报》2020年第10期3154-3162,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51777174);四川省科技计划项目(2019YJ0226)。

摘　　要：高速铁路普遍采用锚段关节式电分相结构,动车组带电闯分相时产生的长电弧在弓网物理场中的运动具有随机性。该文在接触网电流分布的基础上,采用链式电弧模型,计及电弧受到的磁场力、热浮力、空气阻力及行车气流作用,得到电弧链的运动轨迹变化,进而发现起弧初相角、起弧位置对电弧运动发展的影响规律。仿真结果表明,磁力对电弧的运动起主导作用,电弧运动受起弧位置影响尤为显著,但受起弧初相角影响不大;当起弧位置居于吊弦正下方时,电弧整体倾向于沿行车方向进行往复运动,当起弧位置位于吊弦前、吊弦后时,电弧呈现明显的下倾、上飘规律。该文研究揭示了电分相电弧会导致异相短路、对车顶短路、烧损承力索3种不同后果的原因。The articulated phase insulator is widely used in high-speed railway. Long arc occurs when electrical multiple units(EMUs) running through the phase insulator. The arc has a random movement in the coupled physics fields. Based on current distribution of overhead contact system, a chain arc model was used to obtain arc trajectory while taking into account the magnetic force, thermal buoyancy, air resistance and aerodynamic force on arc. Laws of arc movement development under different arcing phases and positions were studied. The simulation results show that the magnetic force dominates the movement of the arc, arcing position has an important impact on the development of arc movement and the influence of arcing phases is not significant, when the arcing position is directly below the dropper, the arc tends to reciprocate along the driving direction, and if the arcing position in front of or behind the dropper, the arc movement shows a clear downward and upward trend. This research explains the reasons for wrong-phase short-circuit fault, short-circuit fault with the roof of EMUs and burning out of messenger cable caused by articulated phase insulator arc.

关 键 词：高速铁路 电分相 链式电弧模型 电弧运动 

分 类 号：U225[交通运输工程—道路与铁道工程]