长大下坡运行下动车组牵引仿真算法研究及系统开发

Research on Traction Simulation Algorithm and System Developmentof Electric Multiple Units Under Long&Large Downhill Operation

针对线路仿真中缺少符合动车组制动特点的长大下坡道运行策略问题,提出复杂运行工况下动车组牵引仿真计算方法。基于误差评价的位移逼近算法和变步长迭代逼近算法求解精确的制动点,将传统空气制动的“惰行+制动”运行策略进行拓展,得到适合处理高速电制动长大下坡问题的牵引仿真算法。开发系统运用于实际线路。结果表明,系统提升了制动点求解精确性,能为牵引工程精细化设计提供数据支持。

Aiming at the lack of long and large downhill running strategies in line simulation that meet the braking characteristics of electric multiple units(EMUs),a simulation calculation method for traction of EMUs under complex operating conditions was proposed.The displacement approximation algorithm based on error evaluation and the variable step length iterative approximation algorithm solved the precise braking point,expanded the“coasting+braking”operating strategy of traditional air braking,and was suitable for handling the problem of high-speed electric braking on long and large downhill slopes.The traction simulation algorithm and the development system were applied to the actual lines.The final results show that the system has improved the accuracy of the braking point solution,and can provide data support for the refined design of traction engineering.