关键词: 铁路运输, 列车最优操纵, 动态规划, 列车, 最小追踪间隔, 节能

Abstract:

Focusing on the characteristics of dense train tracking operation during the peak hour in urban rail transit, this paper takes both reducing traction energy consumption and improving line capacity as objectives in the train driving strategy optimization. The calculation method of traction energy consumption and minimum headway is given under the moving block system. Considering the constraint of safe running and punctual arriving, the twoobjective optimization model is constructed. A dynamic programming based approach combined with ε -constraint method is proposed to solve the model. A case study of Yizhuang urban rail line was executed and a set of Pareto solutions were achieved which reflecting the trade-off between those two objectives. The results showed that the multi-step braking strategy during the phase of entering a station can compress the minimum headway effectively. To reduce the increased running time because of the multi- step braking strategy, trains need to improve their velocity before the phase of entering a station to satisfy the constraint of punctual arriving, which consumes more traction energy.

Key words: railway transportation, optimum driving strategy, dynamic programming, train, minimum headway, energy saving