Optimization of the layout of neutral sections based on a differential evolution algorithm

Abstract

This paper researches optimizing schemes of the setting of neutral sections in order to minimize the delayed time that they cause. Local optimization rules are first put forward through the model of a train passing over a neutral section. Quantitative analyses indicate that the neutral section should be set in a section where the train runs at a constant speed of 150–300 km/h when passing over a neutral section. A differential evolution algorithm (DE) is then introduced to realize global optimization for the layouts of neutral sections along a whole railway line. What’s more, a simulation platform is developed, which can simulate the train’s operation off-line and obtain the optimal layout scheme for neutral sections on a given railway line. Finally, a case study of the Beijing–Shanghai high-speed railway line is conducted on the basis of a simulation platform. Simulation results show that, with the optimal neutral section setting scheme, a train’s running time is reduced by 372 seconds in comparison with the original neutral section setting scheme.