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电弧是受电弓-接触网系统在滑动受流过程中的一种现象。电弧虽能维持电动列车取流的持续性,但对弓网系统会产生电气侵蚀,并对环境带来电磁干扰。作者依据瞬态热传导理论建立弓网系统电弧烧蚀模型,通过热传导计算,推导出温度与时间、距离之间的关系。在MATLAB环境下编制程序,分别对静止电弧和运动电弧在2种热流输入情况下接触线的热过程进行仿真计算。结果表明,静止电弧和运动电弧对接触线的电气侵蚀程度不同。静止电弧在极短的时间内就能引起铜接触线表面熔化。不同速度的运动电弧对接触线表面的侵蚀程度不同,列车运行速度越高,电弧对接触线表面的侵蚀程度越轻微。
Arc is pantograph - catenary system in the phenomenon of sliding flow. Although the arc can maintain the continuity of electric train intake, but the bow network system will produce electrical erosion, and environmental electromagnetic interference. Based on the theory of transient heat conduction, the author establishes the arc ablation model of bow-net system, and deduces the relationship between temperature and time and distance by heat conduction calculation. The program was programmed in MATLAB, and the thermal processes of the contact line of static arc and moving arc were simulated respectively under the condition of two heat flux inputs. The results show that static arc and moving arc have different degrees of electrical erosion on the contact lines. Quiescent arc in a very short period of time can cause the surface melting copper contact line. Different speeds of the arc on the surface of the contact line of erosion of different levels, the higher the speed of the train, the arc erosion of the contact surface of the more minor lines.