负载特性对弓网电弧能量的影响

Pantograph Arc's Energy Characters Under Various Load

随着列车运行速度的提高,弓网离线现象愈来愈严重,弓网电弧频繁发生,弓网电弧烧蚀受电弓滑板和接触网导线,其烧蚀程度与弓网电弧能量的大小密切相关。利用弓网电弧模拟试验系统研究不同负载功率因数、牵引电流时弓网电弧的电压电流,分析弓网电弧的平均燃弧时间与牵引电流和负载功率因数的关系、弓网电弧能量与负载功率因数的关系。研究结果表明:电弧的平均燃弧时间随着牵引电流的增大呈指数增长,且感性负载的燃弧时间较阻性负载的长;随着负载功率因数的增大,弓网电弧的能量逐渐减小。

Due to the increasing speed of the locomotive,the pantograph-catenary disconnection was getting worse,and the pantograph arc occured frequently.The pantograph arc etched the pantograph slider and contact wire,and the etching level was influenced by arcing energy.In this paper,the arc voltage and current of different traction current and power factor was measured by pantograph-catenary arcing test system.The relationship between average arcing duration and traction current,power factor of load was analyzed,as well as the arc energy affected by power factor of load was studied.The results showed that the average arcing duration becomes longer in index with traction current increasing;the arcing duration with inductive load is longer than with resistive load;the arc energy decreases with the rising of load power factor.